Spring Boot常见企业开发场景应用自动配置原理结构分析

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读者应具备:

  • Spring SpringMVC服务器端开发基础

  • Maven基础

本篇主要介绍Spring Boot在企业开发中常见场景的使用、以及Spring Boot的基本原理结构。

以下为本篇设计的技术应用场景:

  1. 构建Spring Java程序

  2. 构建JUnit测试用例

  3. 构建Spring JDBC Template应用程序操作数据库

  4. 构建Servlet、JSP程序

  5. 构建SSH应用(Spring、Spring MVC、Hibernate)

  6. 构建SSM应用(Spring、Spring MVC、MyBatis)

  7. 构建SSJPA应用(Spring、Spring MVC、Spring Data JPA)

  8. 构建FreeMarker应用程序

  9. 构建基于Redis缓存应用程序

  10. 构建基于ActiveMQ消息队列应用程序

  11. 构建基于Spring Security访问控制应用程序

  12. 构建基于Dubbox分布式架构应用程序

介绍完应用场景后,再来了解下Spring Boot的基本原理结构。

引言

如果读者写过稍微复杂一些的Spring程序,那么你一定曾经编写过那铺天盖地的各类配置文件。例如:

  • applicationContext-dao.xml(针对DAO的配置——数据源、持久层框架与spring整合bean)

  • applicationContext-tx.xml(针对事务的配置)

  • applicationContext-amq.xml(针对ActiveMQ的配置)

  • applicationContext-webservice.xml(针对WebService发布的配置)

  • applicationContext-redis.xml(针对操作Redis的配置)

  • applicationContext-security.xml(针对Spring Security的配置)

  • applicationContext-freemarker.xml(针对FreeMarker模板引擎的相关配置)

  • springmvc.xml(Spring MVC的配置)

  • ...

除此之外,我们还要维护大量的依赖。最坑的是,不同的版本框架之间可能会存在不兼容的问题。或许,我们早已习惯了这些配置,但我们今天要学习是以一种崭新的开发方式来开发Spring应用程序。它将掀起一场推翻Spring过去统治的轻量级JavaEE企业应用世界的技术革命。

而这一场技术革命原动力就是我今天要呈现给大家的——Spring Boot。

本篇目标

  • 介绍如何使用Spring Boot开发基于各类技术框架的应用程序

  • 了解Spring Boot自动配置原理、结构

目录

Spring Boot常见企业开发场景应用、自动配置原理结构分析引言本篇目标目录环境准备Spring Java配置Spring Boot基本编程模型导入依赖导入配置编码常见企业开发场景应用构建Spring Java应用程序构建Junit测试用例构建Spring JDBC Template应用程序操作数据库构建Servlet、JSP程序构建SSH应用程序(Spring、Spring MVC、Hibernate)构建SSM应用(Spring、Spring MVC、MyBatis)构建SSJPA应用(Spring、Spring MVC、Spring Data JPA)构建FreeMarker应用程序构建基于Redis缓存应用程序构建基于ActiveMQ消息队列应用程序构建基于Dubbox分布式架构应用程序启动ZooKeeper编写服务提供者编写服务消费者Spring Boot自动配置原理结构分析结尾

环境准备

编译环境:1.7+

构建工具:Maven

数据库:mysql 5.x

开发环境:推荐使用IDEA或者STS

  • 在mysql中创建一个名字为springboot的数据库

  • 使用如下脚本创建表结构

 create table `t_user` (
 `id` int (11),
 `username` varchar (765),
 `password` varchar (300)
 );
 insert into `t_user` (`id`, `username`, `password`) values('2','zhangsan','000');
 insert into `t_user` (`id`, `username`, `password`) values('3','lisi','000');
 insert into `t_user` (`id`, `username`, `password`) values('4','wangwu','000');
 insert into `t_user` (`id`, `username`, `password`) values('5','zhaoliu','000');
 insert into `t_user` (`id`, `username`, `password`) values('6','张北','110');
 insert into `t_user` (`id`, `username`, `password`) values('7','江南','000000');
 insert into `t_user` (`id`, `username`, `password`) values('8','江北','123123');

Spring Java配置

SPring Java配置是Spring 3.0所推荐的配置方式。因为,XML的可读性确实不怎么样,我们一边要编写Java代码,一边要编写XML配置文件。所以,从Spring 3.0开始,推荐使用Java配置+注解方式来编写Spring程序。

接下来,我给大家演示一个比较简单的案例——从数据库中更新一条用户数据、查询一条用户数据。为了简单起见,使用Spring JDBC Template来操作数据库。

  1. 首先创建一个Maven工程,往pom.xml中导入Spring、MySql相关依赖

 <dependencies>
 <dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-context</artifactId>
 <version>4.2.4.RELEASE</version>
 </dependency>
 <dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-jdbc</artifactId>
 <version>4.2.4.RELEASE</version>
 </dependency>
 <dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-test</artifactId>
 <version>4.2.4.RELEASE</version>
 </dependency>
 <dependency>
 <groupId>mysql</groupId>
 <artifactId>mysql-connector-java</artifactId>
 <version>5.1.6</version>
 </dependency>
 <dependency>
 <groupId>junit</groupId>
 <artifactId>junit</artifactId>
 <version>4.12</version>
 </dependency>
 <dependency>
 <groupId>c3p0</groupId>
 <artifactId>c3p0</artifactId>
 <version>0.9.1</version>
 </dependency>
 </dependencies>
 <build>
 <plugins>
 <plugin>
 <groupId>org.apache.maven.plugins</groupId>
 <artifactId>maven-compiler-plugin</artifactId>
 <version>3.1</version>
 <configuration>
 <source>1.7</source>
 <target>1.7</target>
 </configuration>
 </plugin>
 </plugins>
 </build>
  1. 创建Java实体类,

 /**
  * 用户表
  */
 public class User 
 
 private Integer id;
 private String username;// 用户名
 private String password;// 密码
 
 public User() 
 
 
 public User(int id, String username, String password) 
 this.id = id;
 this.username = username;
 this.password = password;
 
 
 public Integer getId() 
 return id;
 
 
 public void setId(Integer id) 
 this.id = id;
 
 
 public String getUsername() 
 return username;
 
 
 public void setUsername(String username) 
 this.username = username;
 
 
 public String getPassword() 
 return password;
 
 
 public void setPassword(String password) 
 this.password = password;
 
 
 @Override
 public String toString() 
 return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
 
 
  1. 写到这,如果大家比较熟悉Spring开发的话,肯定是要开始编写spring配置文件了,并且在配置文件中,创建需要用于操作数据库的Bean。但这儿,我们要使用Java配置来创建Bean。以前在XML文件中创建Bean的配置,现在都写在Java代码中了。以下为Java配置:

 /**
  * @Configuration注解表示这是一个配置类
  * @author FengZhou
  *
  */
 @Configuration
 public class Conf 
 
 /**
  * 创建一个C3P0数据源
  * @return
  * @throws PropertyVetoException
  */
 @Bean
 public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
 ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
 comboPooledDataSource.setDriverClass("com.mysql.jdbc.Driver");
 comboPooledDataSource.setJdbcUrl("jdbc:mysql:///springboot");
 comboPooledDataSource.setUser("root");
 comboPooledDataSource.setPassword("000000");
 
 return comboPooledDataSource;
 
 
 /**
  * 创建一个用于操作数据库的JdbcTemplate
  * @return
  * @throws PropertyVetoException
  */
 @Bean
 public JdbcTemplate jdbcTempalte() throws PropertyVetoException 
 JdbcTemplate jdbcTemplate = new JdbcTemplate();
 jdbcTemplate.setDataSource(c3p0DataSource());
 
 return jdbcTemplate;
 
 

@Configuration这个注解标识,当前修饰的类就是一个配置类。你可以把它认为被@Configuration修饰的类就是一个配置文件。

@Bean这个注解表示Spring会自动执行被它修饰的方法,并且将此方法的返回对象放入到Spring IOC容器中。

上述代码创建了两个Bean,分别是C3P0的数据源和用于操作数据的JdbcTemplate。

  1. 编写测试用例

 
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes=Conf.class)// 加载Java配置
 public class JdbcTemplateTest01 
 
 @Autowired
 private JdbcTemplate jdbcTemplate;
 
 @Test
 public void test01() 
         // 执行一条更新语句
 jdbcTemplate.execute("update t_user t set t.username='zhaosi' where t.id = 1");
 
 
 @Test
 public void test02() 
         // 查询一条数据
 jdbcTemplate.query("select * from t_user where id = 2", BeanPropertyRowMapper.newInstance(User.class));
 
 
 

本次的测试用例,不再有applicationContext.xml配置文件,而是使用一个Java配置类代替了这个配置文件。

Spring Boot基本编程模型

接下来,我们要开始使用Spring Boot开发应用程序。Spring Boot的基本开发模型如下:

导入依赖

1、添加起步依赖(这个起步依赖不是具体的JAR包,而是你要开发什么样的功能,就使用什么样的起步依赖)——注意:可以把起步依赖看成一个Spring Boot封装过的特殊依赖,这个依赖也是具备有传递性特征的

2、导入其他关联依赖(数据库驱动、JSTL等)

导入配置

1、配置application.properties或者application.yml

2、编写Java自定义配置

编码

1、编写Main入口,并加载SpringBoot自动配置

2、编写业务代码

a)        获取Spring Boot自动配置生成的BEAN Template

b)        使用BEAN Template来执行业务操作

大家可以先不用了解Spring Boot开发的具体细节,只需要重点记住这几个重点:

  • 导入依赖

  • 导入配置

  • 编写代码

这个过程其实和我们之前的Spring开发并没有太大区别。

常见企业开发场景应用

构建Spring Java应用程序

第一个应用不涉及到数据库的操作。我们的目标是使用Spring Boot来编写一个简单的Java程序。这个Java程序只是通过Spring Boot来创建一个Spring IOC容器,并从调用容器中Bean的方法。

  1. 导入Spring Boot依赖

    还记得前面的代码吗?我们在创建Maven项目后,需要往pom.xml中导入很多的以来。而使用了Spring Boot之后呢?

     <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>1.5.14.RELEASE</version>
     </parent>
     
     <dependencies>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter</artifactId>
     </dependency>
     </dependencies>

    yup. 你没看错,就只有这么几行。这个以spring-boot-starter开头的依赖称作起步依赖。可以把它看成是Spring Boot应用程序必须要导入的依赖。它里面封装了很多的其他的依赖。这里,我们需要开发Spring应用程序,只需要导入一个spring-boot-starter即可。

  2. 编写DAO接口和实现

     public interface UserDao 
     
     /**
      * 根据ID获取用户
      * @param id
      * @return
      */
     User get(int id);
     
     

    为了简单,这里就先不从数据中查询数据,直接构建一些User对象来操作(User实体类之前已经给出)

     @Repository
     public class UserDaoImpl implements UserDao
     
     private ArrayList<User> userList = new ArrayList<User>();
     
     public UserDaoImpl() 
             // 往数组中添加一些模拟测试数据
     userList.add(new User(1, "zhangsan", "000"));
     userList.add(new User(2, "lisi", "000"));
     userList.add(new User(3, "wangwu", "000"));
     userList.add(new User(4, "zhaoliu", "000"));
     
     
     @Override
     public User get(int id) 
     for (User user : userList) 
     if(user.getId().equals(id)) 
     return user;
     
     
     
     return null;
     
     
     
  3. 编写服务接口和实现类

     public interface UserService 
     
     /**
      * 根据ID获取用户
      * @param i
      * @return
      */
     User get(int id);
     
     
     @Service
     public class UserServiceImpl implements UserService
     
     @Autowired
     private UserDao userDao;
     
     @Override
     public User get(int id) 
     return userDao.get(id);
     
     
     
  4. 编写Spring Boot应用程序入口

    @SpringBootApplication
    public class Application 
    
    	public static void main(String[] args) 
    		ConfigurableApplicationContext context = SpringApplication.run(Application.class);
    		UserService userService = context.getBean(UserService.class);
    		
    		User user = userService.get(1);
    		System.out.println(user);
    	
    

    注意:

    要在main所在的Applcation类上添加@SpringBootApplication注解,这个注解会启动Spring Boot的自动配置。然后使用SpringApplication.run可以创建一个Spring IOC工厂,它的返回值就是我们熟知的ApplicationContext。然后,我们就可以获取IOC工厂的Bean了。

构建Junit测试用例

要构建基于Spring Boot的测试用例,还需要额外引入另一个起步依赖。

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
		</dependency>

编写测试用例如下:

@RunWith(SpringRunner.class)
@SpringBootTest(classes=Application.class)
public class UserServiceImplTest 

	@Autowired
	private UserService userService;
	
	@Test
	public void testGet() 
		User user = userService.get(2);
		System.out.println(user);
	

使用@SpringBootTest替代之前的@ContextConfiguration,直接加载Spring Boot的入口类即可。

构建Spring JDBC Template应用程序操作数据库

接下来,我将使用Spring Boot来使用JDBC Template操作数据库。

导入起步依赖

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.14.RELEASE</version>
</parent>	
<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.6</version>
		</dependency>
		<dependency>
			<groupId>c3p0</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.1</version>
		</dependency>
	</dependencies>

因为,这里需要使用到mysql驱动以及c3p0连接池,所以多导入了两个依赖

重新编写DAO

public interface UserDao 
	/**
	 * 根据ID获取用户
	 * @param id
	 * @return
	 */
	User get(int id);



@Repository
public class UserDaoImpl implements UserDao

	@Autowired
	private JdbcTemplate jdbcTemplate;

	@Override
	public User get(int id) 
		return jdbcTemplate.queryForObject("select * from t_user t where t.id = ?",BeanPropertyRowMapper.newInstance(User.class),id);
	

编写Service

public interface UserService 

	/**
	 * 根据ID获取用户
	 * @param i
	 * @return
	 */
	User get(int id);


@Service
public class UserServiceImpl implements UserService
	
	@Autowired
	private UserDao userDao;

	@Override
	public User get(int id) 
		return userDao.get(id);
	

编写配置文件application.properties

c3p0.driverClass=com.mysql.jdbc.Driver
c3p0.jdbcUrl=jdbc:mysql:///springboot
c3p0.user=root
c3p0.password=000000

注意:这个配置文件中以c3p0开头的,其实是自定义的配置。一会我们需要指定这个前缀来进行加载

编写启动类

@SpringBootApplication
public class Application 
	
	@Bean(name="datasource")
	@Primary
	@ConfigurationProperties(prefix="c3p0")
	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
		return new ComboPooledDataSource();
	

	public static void main(String[] args) 
		ConfigurableApplicationContext context = SpringApplication.run(Application.class);
		UserService userService = context.getBean(UserService.class);
		
		User user = userService.get(2);
		System.out.println(user);
	

注意@ConfigurationProperties(prefix="c3p0")这个注解,这个注解表示,将application.properties配置文件中的以c3p0开头的配置信息注入到ComboPooledDataSource这个对象上面。而在application.properties中的配置c3p0.driverClass=com.mysql.jdbc.Driver,相当于就是在进行属性注入。这里指的是:将com.mysql.jdbc.Driver注入到ComboPooledDataSource Bean的driverClass属性。

这种加载配置的方法,真的是不服不行。要比之前简单了很多。

构建Servlet、JSP程序

接下来我们要来使用Spring Boot来做最简单的Web开发(虽然我们开发不一定会用到,但我们还是来体验体验,毕竟这是我们的曾经啊...)

  1. 导入Spring Boot起步依赖

 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>1.5.14.RELEASE</version>
 </parent>
 
 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-jdbc</artifactId>
 </dependency>
 <dependency>
 <groupId>org.apache.tomcat.embed</groupId>
 <artifactId>tomcat-embed-jasper</artifactId>
 <scope>provided</scope>
 </dependency>
 <dependency>
 <groupId>mysql</groupId>
 <artifactId>mysql-connector-java</artifactId>
 <version>5.1.6</version>
 </dependency>
 <dependency>
 <groupId>c3p0</groupId>
 <artifactId>c3p0</artifactId>
 <version>0.9.1</version>
 </dependency>
 <dependency>
 <groupId>javax.servlet</groupId>
 <artifactId>jstl</artifactId>
 </dependency>
 </dependencies>

注意:使用Spring Boot开发JSP应用程序,一定要加载下面的依赖

<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
    <scope>provided</scope>
</dependency>
  1. 编写DAO

     public interface UserDao 
     
     /**
      * 根据ID获取用户
      * @param id
      * @return
      */
     User get(int id);
     
     
     @Repository
     public class UserDaoImpl implements UserDao
     
     @Autowired
     private JdbcTemplate jdbcTemplate;
     
     @Override
     public User get(int id) 
     return jdbcTemplate.queryForObject("select * from t_user t where t.id = ?",BeanPropertyRowMapper.newInstance(User.class),id);
     
     
     
  2. 编写Service

     public interface UserService 
     
     /**
      * 根据ID获取用户
      * @param i
      * @return
      */
     User get(int id);
     
     /**
      * 查询所有用户
      * @return
      */
     List<User> findAll();
     
     
     @Service
     @Transactional
     public class UserServiceImpl implements UserService
     
     @Autowired
     private UserDao userDao;
     
     @Override
     public User get(int id) 
     return userDao.get(id);
     
     
  3. 编写Servlet | 这里使用的是注解方式定义Servlet,这种方式更加容易与Spring进行整合。

    @WebServlet(name="UserServlet", urlPatterns="/user/findUserList")
    public class UserServlet extends HttpServlet
    
    	@Autowired
    	private UserService userService;
    	
    	@Override
    	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException 
    		doPost(req, resp);
    	
    
    	@Override
    	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException 
    		List<User> users = userService.findAll();
    		req.setAttribute("list", users);
    		req.getRequestDispatcher("/index.jsp").forward(req, resp);
    	
    

    urlPatterns配置了这个Servlet被访问的URL

  4. 编写JSP页面

    <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>JSP测试</title>
    </head>
    <body>
    	<table border=1>
    		<tr>
    			<th>ID</th>
    			<th>用户名</th>
    			<th>密码</th>
    		</tr>
    		
    		<c:forEach items="$list" var="user">
    		<tr>
    			<td>$user.id</td>
    			<td>$user.username</td>
    			<td>$user.password</td>
    		</tr>
    		</c:forEach>
    	</table>
    </body>
    </html>
  5. 编写入口

    @SpringBootApplication
    @ServletComponentScan
    public class Application 
    	
    	@Bean(name="datasource")
    	@ConfigurationProperties(prefix="c3p0")
    	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
    		return new ComboPooledDataSource();
    	
    
    	public static void main(String[] args) 
    		SpringApplication.run(Application.class);
    	
    

    注意:一定要在Application类上加上@ServletComponentScan注解,否则Servlet是不会被加载的。

  6. 编写配置文件

    server.port=10086
    server.context-path=/
    
    c3p0.driverClass=com.mysql.jdbc.Driver
    c3p0.jdbcUrl=jdbc:mysql:///springboot
    c3p0.user=root
    c3p0.password=000000

    server.port配置的是web应用访问的端口号,server.context-path=/是应用访问的根路径

  7. 访问http://localhost:10086/user/findUserList测试应用。如果应用执行成功应该可以看到用户数据

构建SSH应用程序(Spring、Spring MVC、Hibernate)

  1. 导入依赖

    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.5.14.RELEASE</version>
    	</parent>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-jdbc</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.tomcat.embed</groupId>
    			<artifactId>tomcat-embed-jasper</artifactId>
    			<scope>provided</scope>
    		</dependency>
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    			<version>5.1.6</version>
    		</dependency>
    		<dependency>
    			<groupId>c3p0</groupId>
    			<artifactId>c3p0</artifactId>
    			<version>0.9.1</version>
    		</dependency>
    		<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>jstl</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-devtools</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-data-jpa</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-actuator</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-tx</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>javassist</groupId>
    			<artifactId>javassist</artifactId>
    			<version>3.11.0.GA</version>
    		</dependency>
    	</dependencies>
  2. 使用JPA注解修饰User实体类

    @Entity
    @Table(name="t_user")
    public class User 
    
    	@Id
    	@GeneratedValue(strategy=GenerationType.IDENTITY)
    	private Integer id;
    	private String username;
    	private String password;
    	
    	public User() 
    	
    
    	public User(Integer id, String username, String password) 
    		this.id = id;
    		this.username = username;
    		this.password = password;
    	
    
    	public User(String username, String password) 
    		this(null, username, password);
    	
    
    	public Integer getId() 
    		return id;
    	
    
    	public void setId(Integer id) 
    		this.id = id;
    	
    
    	public String getUsername() 
    		return username;
    	
    
    	public void setUsername(String username) 
    		this.username = username;
    	
    
    	public String getPassword() 
    		return password;
    	
    
    	public void setPassword(String password) 
    		this.password = password;
    	
    
    	@Override
    	public String toString() 
    		return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
    	
    
  3. 编写DAO

    public interface UserDao 
    
    	User get(int id);
    	List<User> findAll();
    	void add(User user);
    
    
    
    @Repository
    public class UserDaoImpl extends HibernateDaoSupport implements UserDao
    	// 注入SessionFactory
    	@Autowired
    	public void autoWiredFactory(SessionFactory sessionFactory) 
    		super.setSessionFactory(sessionFactory);
    	
    	
    	@Override
    	public User get(int id) 
    		return getHibernateTemplate().get(User.class, id);
    	
    
    	@Override
    	public List<User> findAll() 
    		return getHibernateTemplate().findByExample(new User());
    	
    
    	@Override
    	public void add(User user) 
    		getHibernateTemplate().save(user);
    	
    
  4. 编写Service

    public interface UserService 
    
    	/**
    	 * 根据ID获取用户
    	 * @param i
    	 * @return
    	 */
    	User get(int id);
    
    	/**
    	 * 查询所有用户
    	 * @return
    	 */
    	List<User> findAll();
    
    	/**
    	 * 新增用户
    	 * @param user
    	 */
    	void add(User user);
    
    
    
    
    @Service
    @Transactional
    public class UserServiceImpl implements UserService
    	
    	@Autowired
    	private UserDao userDao;
    
    	@Override
    	public User get(int id) 
    		return userDao.get(id);
    	
    
    	@Override
    	public List<User> findAll() 
    		return userDao.findAll();
    	
    
    	@Override
    	public void add(User user) 
    		userDao.add(user);
    	
    
    
  5. 编写Controller/Handler

    @Controller
    @RequestMapping("/user")
    public class UserController 
    
    	@Autowired
    	private UserService userService;
    	
    	@RequestMapping("/findUserList")
    	public String findUserList(Model model) 
    		List<User> list = userService.findAll();
    		model.addAttribute("list", list);
    		
    		return "/index.jsp";
    	
    
  6. JSP页面参见Servlet/JSP案例

  7. 编写Spring Boot入口

    @SpringBootApplication
    public class Application 
    
    	public static void main(String[] args) 
    		SpringApplication.run(Application.class);
    	
    	
    	@Bean
    	@ConfigurationProperties(prefix="c3p0")
    	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
    		return new ComboPooledDataSource();
    	
    	
    	@Bean
    	@ConfigurationProperties(prefix="hibernate")
    	public LocalSessionFactoryBean sessionFactory() throws PropertyVetoException 
    		LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
    		sessionFactoryBean.setDataSource(c3p0DataSource());
    		
    		return sessionFactoryBean;
    	
    	
    	@Bean
    	public HibernateTransactionManager transactionManager() throws PropertyVetoException 
    		HibernateTransactionManager tx = new HibernateTransactionManager();
    		tx.setSessionFactory(sessionFactory().getObject());
    		
    		return tx;
    	
    

    注意:此处因为Hibernate没有Starter起步依赖,所以我使用了Java配置来整合Hibernate。第一个Bean是C3P0数据源,第二个Bean是SessionFactory,第三个Bean是事务管理器。

  8. 编写配置文件

    server.port=10086
    server.context-path=/
    
    c3p0.driverClass=com.mysql.jdbc.Driver
    c3p0.jdbcUrl=jdbc:mysql:///springboot
    c3p0.user=root
    c3p0.password=000000
    
    hibernate.packagesToScan=com.itheima.springboot.entity

构建SSM应用(Spring、Spring MVC、MyBatis)

为了简单起见,这里使用逆向工程生成实体类、Mapper接口、Mapper映射文件。因为查询实体、映射文件的代码比较长,这里就不把代码贴上来了,大家自己使用逆向工程生成下就OK。

  1. 导入依赖

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.14.RELEASE</version>
    </parent>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
    
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
    
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>
    
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
    
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
    </dependencies>
  2. Service代码

    public interface UserService 
    
    	/**
    	 * 根据ID获取用户
    	 * @param i
    	 * @return
    	 */
    	TUser get(int id);
    
    	/**
    	 * 查询所有用户
    	 * @return
    	 */
    	List<TUser> findAll();
    
    	/**
    	 * 新增用户
    	 * @param user
    	 */
    	void add(TUser user);
    
    
    @Service
    @Transactional
    public class UserServiceImpl implements UserService
    	
    	@Autowired
    	private TUserMapper userMapper;
    
    	@Override
    	public TUser get(int id) 
    		return userMapper.selectByPrimaryKey(id);
    	
    
    	@Override
    	public List<TUser> findAll() 
    		return userMapper.selectByExample(null);
    	
    
    	@Override
    	public void add(TUser user) 
    		userMapper.insert(user);
    	
    
  3. Controller代码

    @Controller
    @RequestMapping("/user")
    public class UserController 
    
    	@Autowired
    	private UserService userService;
    	
    	@RequestMapping("/findUserList")
    	public String findUserList(Model model) 
    		List<TUser> list = userService.findAll();
    		model.addAttribute("list", list);
    		
    		return "/index.jsp";
    	
    
    
  4. Spring Boot入口应用

    @SpringBootApplication
    @MapperScan(basePackages="com.itheima.springboot.mapper")
    public class Application 
    
    	public static void main(String[] args) 
    		SpringApplication.run(Application.class);
    	
    

    注意:Spring Boot整合MyBatis需要在Application类上添加@MapperScan,否则不会为Mapper创建代理对象,执行程序失败。

  5. 配置文件

    server.port=10086
    server.context-path=/
    
    #数据库配置
    spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    spring.datasource.url=jdbc:mysql:///springboot
    spring.datasource.username=root
    spring.datasource.password=000000

    这里使用默认的数据源,如果想要使用其他的数据源参照之前的配置即可

  6. 访问http://localhost:10086/user/findUserList

构建SSJPA应用(Spring、Spring MVC、Spring Data JPA)

  1. 导入Maven依赖

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.14.RELEASE</version>
    </parent>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1</version>
        </dependency>
    </dependencies>

    注意:导入了spring-boot-starter-data-jpa依赖

  2. 编写Java实体类,参考SSH整合JPA实体类

  3. 编写DAO

    public interface UserRepository extends JpaRepository<User, Integer>
    

    (这个代码是真的喜欢)

  4. 编写Service

    public interface UserService 
    
    	/**
    	 * 根据ID获取用户
    	 * @param i
    	 * @return
    	 */
    	User get(int id);
    
    	/**
    	 * 查询所有用户
    	 * @return
    	 */
    	List<User> findAll();
    
    	/**
    	 * 新增用户
    	 * @param user
    	 */
    	void add(User user);
    
    
    
  5. 编写Controller

    @Controller
    @RequestMapping("/user")
    public class UserController 
    
    	@Autowired
    	private UserService userService;
    
    	@RequestMapping("/findUserList")
    	public String findUserList(Model model) 
    		List<User> list = userService.findAll();
    		model.addAttribute("list", list);
    		
    		return "/index.jsp";
    	
    
  6. 编写入口

    @SpringBootApplication
    public class Application 
    
    	public static void main(String[] args) 
    		SpringApplication.run(Application.class);
    	
    	
    	@Bean(name="datasource")
    	@Primary
    	@ConfigurationProperties(prefix="c3p0")
    	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
    		return new ComboPooledDataSource();
    	
    
  7. 配置文件

    server.port=10086
    server.context-path=/
    
    c3p0.driverClass=com.mysql.jdbc.Driver
    c3p0.jdbcUrl=jdbc:mysql:///springboot
    c3p0.user=root
    c3p0.password=000000

构建FreeMarker应用程序

  1. 导入依赖

    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.5.14.RELEASE</version>
    	</parent>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-data-jpa</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    			<version>5.1.6</version>
    		</dependency>
    		<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>jstl</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.tomcat.embed</groupId>
    			<artifactId>tomcat-embed-jasper</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>c3p0</groupId>
    			<artifactId>c3p0</artifactId>
    			<version>0.9.1</version>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-freemarker</artifactId>
    		</dependency>
    	</dependencies>

    多导入了spring-boot-starter-freemarker起步依赖

  2. 编写DAO

    public interface UserRepository extends JpaRepository<User, Integer>
    
  3. 编写Service

    public interface UserService 
    
    	/**
    	 * 根据ID获取用户
    	 * @param i
    	 * @return
    	 */
    	User get(int id);
    
    	/**
    	 * 查询所有用户
    	 * @return
    	 */
    	List<User> findAll();
    
    	/**
    	 * 新增用户
    	 * @param user
    	 */
    	void add(User user);
    
    
    
    @Service
    @Transactional
    public class UserServiceImpl implements UserService
    	
    	@Autowired
    	private UserRepository userRepository;
    
    	@Override
    	public User get(int id) 
    		return userRepository.findOne(id);
    	
    
    	@Override
    	public List<User> findAll() 
    		return userRepository.findAll();
    	
    
    	@Override
    	public void add(User user) 
    		userRepository.save(user);
    	
    
  4. 编写Controller

    @Controller
    @RequestMapping("/user")
    public class UserController 
    	// 静态页面输出到的目录
    	@Value("$freemarker.output_path")
    	private String OUTPUT_PATH;
    
    	@Autowired
    	private UserService userService;
        // 获取FreeMarker配置类
    	@Autowired
    	private Configuration configuration;
    	
    	@RequestMapping("/genPage")
    	@ResponseBody
    	public Map genPage() throws Exception 
    		List<User> list = userService.findAll();
    		
    		Map model = new HashMap<String, Object>();
    		model.put("list", list);
    		
    		Template template = configuration.getTemplate("user_list.ftl");
    		template.process(model, new FileWriter(OUTPUT_PATH + "userList.html"));
    	
    		Map result = new HashMap<String, Object>();
    		result.put("success", true);
    		result.put("message", "生成页面成功!");
    		
    		return result;
    	
    
  5. 编写入口

    @SpringBootApplication
    public class Application 
    
    	public static void main(String[] args) 
    		SpringApplication.run(Application.class);
    	
    	
    	@Bean(name="datasource")
    	@Primary
    	@ConfigurationProperties(prefix="c3p0")
    	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
    		return new ComboPooledDataSource();
    	
    
  6. 编写配置文件

    server.port=10086
    server.context-path=/
    # FreeMarker静态页面输出目录
    freemarker.output_path=G:/workspace/free_test/t49/src/main/webapp/
    
    c3p0.driverClass=com.mysql.jdbc.Driver
    c3p0.jdbcUrl=jdbc:mysql:///springboot
    c3p0.user=root
    c3p0.password=000000
  7. 编写FreeMarker模板,此模板默认放在classpath下的template/user_list.ftl中

    <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>JSP测试</title>
    </head>
    <body>
    	<table border=1>
    		<tr>
    			<th>ID</th>
    			<th>用户名</th>
    			<th>密码</th>
    		</tr>
    		
    		<#list list as user>
    			<tr>
    				<td>$user.id</td>
    				<td>$user.username</td>
    				<td>$user.password</td>
    			</tr>
    		</#list>
    	</table>
    </body>
    </html>
  8. 访问http://localhost:10086/user/genPage,然后检查HTML页面是否生成

构建基于Redis缓存应用程序

  1. 导入依赖

     <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>1.5.14.RELEASE</version>
     </parent>
     
     <properties>
     <java.version>1.8</java.version>
     </properties>
     
     <dependencies>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
     </dependency>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-data-jpa</artifactId>
     </dependency>
     <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <version>5.1.6</version>
     </dependency>
     <dependency>
     <groupId>javax.servlet</groupId>
     <artifactId>jstl</artifactId>
     </dependency>
     <dependency>
     <groupId>org.apache.tomcat.embed</groupId>
     <artifactId>tomcat-embed-jasper</artifactId>
     </dependency>
     <dependency>
     <groupId>c3p0</groupId>
     <artifactId>c3p0</artifactId>
     <version>0.9.1</version>
     </dependency>
     
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-data-redis</artifactId>
     </dependency>
     </dependencies>

    要开发导入Redis起步依赖spring-boot-starter-data-redis

  2. 编写DAO

     public interface UserRepository extends JpaRepository<User, Integer>
     
  3. 编写Service

    public interface UserService 
    
    	/**
    	 * 根据ID获取用户
    	 * @param i
    	 * @return
    	 */
    	User get(int id);
    
    	/**
    	 * 查询所有用户
    	 * @return
    	 */
    	List<User> findAll();
    
    	/**
    	 * 新增用户
    	 * @param user
    	 */
    	void add(User user);
    
    
    
    @Service
    @Transactional
    public class UserServiceImpl implements UserService
    	
    	@Autowired
    	private UserRepository userRepository;
    	@Autowired
    	private RedisTemplate redisTemplate;
    
    	@Override
    	public User get(int id) 
    		return userRepository.findOne(id);
    	
    
    	@Override
    	public List<User> findAll() 
    		Long size = redisTemplate.boundListOps("userList").size();
    		List<User> userList = redisTemplate.boundListOps("userList").range(0, size);
    		
    		if(userList == null || size == 0) 
    			System.out.println("从数据库中获取数据...");
    			userList = userRepository.findAll();
    			System.out.println("将数据放入缓存...");
    			redisTemplate.boundListOps("userList").rightPushAll(userList.toArray(new User[0]));
    			return userList;
    		
    		else 
    			System.out.println("从缓存中获取数据...");
    			return userList;
    		
    	
    
    	@Override
    	public void add(User user) 
    		userRepository.save(user);
    	
    
    
  4. 编写Controller

    @Controller
    @RequestMapping("/user")
    public class UserController 
    
    	@Value("$freemarker.output_path")
    	private String OUTPUT_PATH;
    
    	@Autowired
    	private UserService userService;
    	
    	@RequestMapping("/findUserList")
    	public String findUserList(Model model) 
    		List<User> list = userService.findAll();
    		model.addAttribute("list", list);
    		
    		return "/index.jsp";
    	
    
    
  5. 编写Spring Boot入口

    @SpringBootApplication
    public class Application 
    
    	public static void main(String[] args) 
    		SpringApplication.run(Application.class);
    	
    	
    	@Bean(name="datasource")
    	@Primary
    	@ConfigurationProperties(prefix="c3p0")
    	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
    		ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
    		
    		return comboPooledDataSource;
    	
    
  6. 编写配置文件

    server.port=10086
    server.context-path=/
    
    c3p0.driverClass=com.mysql.jdbc.Driver
    c3p0.jdbcUrl=jdbc:mysql:///springboot
    c3p0.user=root
    c3p0.password=000000
  7. 启动Redis

  8. 访问http://localhost:10086/user/findUserList,注意控制台的变化

构建基于ActiveMQ消息队列应用程序

  1. 导入依赖

     <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>1.5.14.RELEASE</version>
     </parent>
     
     <dependencies>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
     </dependency>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-data-jpa</artifactId>
     </dependency>
     <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <version>5.1.6</version>
     </dependency>
     <dependency>
     <groupId>javax.servlet</groupId>
     <artifactId>jstl</artifactId>
     </dependency>
     <dependency>
     <groupId>org.apache.tomcat.embed</groupId>
     <artifactId>tomcat-embed-jasper</artifactId>
     </dependency>
     <dependency>
     <groupId>c3p0</groupId>
     <artifactId>c3p0</artifactId>
     <version>0.9.1</version>
     </dependency>
     
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-freemarker</artifactId>
     </dependency>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-activemq</artifactId>
     </dependency>
     <dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>fastjson</artifactId>
     <version>1.2.28</version>
     </dependency>
     </dependencies>

    这里导入了ActiveMQ的起步依赖

  2. 编写DAO

    public interface UserRepository extends JpaRepository<User, Integer>
    
  3. 编写Service

    public interface UserService 
    
    	/**
    	 * 根据ID获取用户
    	 * @param i
    	 * @return
    	 */
    	User get(int id);
    
    	/**
    	 * 查询所有用户
    	 * @return
    	 */
    	List<User> findAll();
    
    	/**
    	 * 新增用户
    	 * @param user
    	 */
    	void add(User user);
    
    
    
    @Service
    @Transactional
    public class UserServiceImpl implements UserService
    	
    	@Autowired
    	private UserRepository userRepository;
    
    	@Override
    	public User get(int id) 
    		return userRepository.findOne(id);
    	
    
    	@Override
    	public List<User> findAll() 
    		return userRepository.findAll();
    	
    
    	@Override
    	public void add(User user) 
    		userRepository.save(user);
    	
    
    
  4. 编写Controller

    @Controller
    @RequestMapping("/user")
    public class UserController 
    	
    	@Autowired
    	private UserService userService;
    	@Autowired
    	private JmsTemplate jmsTemplate;
    	
    	@RequestMapping("/findUserList")
    	public String findUserList(Model model) 
    		List<User> list = userService.findAll();
    		model.addAttribute("list", list);
    		
    		return "/index.jsp";
    	
    	
    	@RequestMapping("/add")
    	public String add(User user) 
    		userService.add(user);
    		final List<User> userList = userService.findAll();
    		
    		jmsTemplate.send("queue_page", new MessageCreator() 
    			
    			@Override
    			public Message createMessage(Session session) throws JMSException 
    				return session.createTextMessage(JSON.toJSONString(userList));
    			
    		);
    		
    		return "redirect:/user/findUserList";
    	
    

    在添加一个用户,往AMQ中发送一条queue消息

  5. 编写Listener

    @Component
    public class PageGeneratorListener 
    
    	@Value("$freemarker.output_path")
    	private String OUTPUT_PATH;
    	@Autowired
    	private Configuration configuration;
    	
    	@JmsListener(destination="queue_page")
    	public void genHtml(String userListStr) throws Exception 
    		Template template = configuration.getTemplate("user_list.ftl");
    		List<User> userList = JSON.parseArray(userListStr, User.class);
    		
    		Map map = new HashMap<String, Object>();
    		map.put("list", userList);
    		
    		template.process(map, new FileWriter(OUTPUT_PATH + "user_list.html"));
    	
    

    监听AMQ中queue_page队列的消息,如果接收到消息,使用FreeMarker重新生成一个HTML页面在服务器端

  6. 编写入口

    @SpringBootApplication
    public class Application 
    
    	public static void main(String[] args) 
    		SpringApplication.run(Application.class);
    	
    	
    	@Bean(name="datasource")
    	@Primary
    	@ConfigurationProperties(prefix="c3p0")
    	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
    		ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
    		
    		return comboPooledDataSource;
    	
    
  7. 编写配置文件

    server.port=10086
    server.context-path=/
    
    freemarker.output_path=G:/workspace/free_test/t51/src/main/webapp/
    
    spring.activemq.broker-url=tcp://localhost:61616
    spring.activemq.user=admin
    spring.activemq.password=admin
    
    c3p0.driverClass=com.mysql.jdbc.Driver
    c3p0.jdbcUrl=jdbc:mysql:///springboot
    c3p0.user=root
    c3p0.password=000000

    构建基于Spring Security访问控制应用程序

    1. 导入依赖

      	<parent>
      		<groupId>org.springframework.boot</groupId>
      		<artifactId>spring-boot-starter-parent</artifactId>
      		<version>1.5.14.RELEASE</version>
      	</parent>
      
      	<dependencies>
      		<dependency>
      			<groupId>org.springframework.boot</groupId>
      			<artifactId>spring-boot-starter-web</artifactId>
      		</dependency>
      		<dependency>
      			<groupId>org.springframework.boot</groupId>
      			<artifactId>spring-boot-starter-data-jpa</artifactId>
      		</dependency>
      		<dependency>
      			<groupId>mysql</groupId>
      			<artifactId>mysql-connector-java</artifactId>
      			<version>5.1.6</version>
      		</dependency>
      		<dependency>
      			<groupId>javax.servlet</groupId>
      			<artifactId>jstl</artifactId>
      		</dependency>
      		<dependency>
      			<groupId>org.apache.tomcat.embed</groupId>
      			<artifactId>tomcat-embed-jasper</artifactId>
      		</dependency>
      		<dependency>
      			<groupId>org.springframework.boot</groupId>
      			<artifactId>spring-boot-starter-security</artifactId>
      		</dependency>
      		<dependency>
      			<groupId>c3p0</groupId>
      			<artifactId>c3p0</artifactId>
      			<version>0.9.1</version>
      		</dependency>
      		<dependency>
      			<groupId>org.apache.commons</groupId>
      			<artifactId>commons-lang3</artifactId>
      			<version>3.4</version>
      		</dependency>
      	</dependencies>

      导入了Spring Security的起步依赖spring-boot-starter-security

    2. 编写DAO

      public interface UserRepository extends JpaRepository<User, Integer>
      	// 根据用户名查询用户
      	User findByUsername(String username);
      
    3. 编写Service

      public interface UserService 
      
      	/**
      	 * 根据ID获取用户
      	 * @param i
      	 * @return
      	 */
      	User get(int id);
      
      	/**
      	 * 查询所有用户
      	 * @return
      	 */
      	List<User> findAll();
      
      	/**
      	 * 新增用户
      	 * @param user
      	 */
      	void add(User user);
      
      
      
      @Service
      @Transactional
      public class UserServiceImpl implements UserService
      	
      	@Autowired
      	private UserRepository userRepository;
      
      	@Override
      	public User get(int id) 
      		return userRepository.findOne(id);
      	
      
      	@Override
      	public List<User> findAll() 
      		return userRepository.findAll();
      	
      
      	@Override
      	public void add(User user) 
      		userRepository.save(user);
      	
      
      
    4. 编写Spring Security登录验证用户服务

      @Service
      @Transactional
      public class AuthUserService implements UserDetailsService 
      	
      	@Autowired
      	private UserRepository userRepository;
      	
      	@Override
      	public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException 
      		
      		if(StringUtils.isNotBlank(username)) 
                  // 从数据库中获取用户
      			User user = userRepository.findByUsername(username);
      			
      			if(user != null) 
                      // 创建用户、加载角色
      				List<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
      				authorities.add(new SimpleGrantedAuthority("ROLE_USER"));
      			
      			return new org.springframework.security.core.userdetails.User(
      				username, user.getPassword(), authorities);
      			
      			else 
      				throw new UsernameNotFoundException("用户名不存在");
      			
      		
      		
      		return null;
      	
      
    5. 编写Controller

      @Controller
      @RequestMapping("/user")
      public class UserController 
      	
      	@Autowired
      	private UserService userService;
      	
      	@RequestMapping("/findUserList")
      	public String findUserList(Model model) 
      		List<User> list = userService.findAll();
      		model.addAttribute("list", list);
      		
      		return "/index.jsp";
      	
      	
      	@RequestMapping("/add")
      	public String add(User user) 
      		userService.add(user);
      		
      		return "redirect:/user/findUserList";
      	
      
    6. 编写应用入口

      @SpringBootApplication
      public class Application 
      
      	public static void main(String[] args) 
      		SpringApplication.run(Application.class);
      	
      	
      	@Bean(name="datasource")
      	@Primary
      	@ConfigurationProperties(prefix="c3p0")
      	public ComboPooledDataSource c3p0DataSource() throws PropertyVetoException 
      		ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
      		
      		return comboPooledDataSource;
      	
      
    7. 编写配置文件

       server.port=10086
       server.context-path=/
       
       freemarker.output_path=G:/workspace/free_test/t51/src/main/webapp/
       
       c3p0.driverClass=com.mysql.jdbc.Driver
       c3p0.jdbcUrl=jdbc:mysql:///springboot
       c3p0.user=root
       c3p0.password=000000
    8. 编写页面

       <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
       <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
       <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
       <html>
       <head>
       <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
       <title>JSP测试</title>
       </head>
       <body>
       <table border="1">
       <form action="<%=request.getContextPath()%>/user/add" method="post">
       <tr>
       <td>用户名:<input type="text" name="username"/></td>
       <td>密码:<input type="text" name="password"/></td>
       <td><input type="submit" value="新增"/></td>
       </tr>
       </form>
       </table>
       
       <table border=1>
       <tr>
       <th>ID</th>
       <th>用户名</th>
       <th>密码</th>
       </tr>
       
       <c:forEach items="$list" var="user">
       <tr>
       <td>$user.id</td>
       <td>$user.username</td>
       <td>$user.password</td>
       </tr>
       </c:forEach>
       </table>
       </body>
       </html>
    9. 访问http://localhost:10086/user/findUserList,弹出登录对话框,输入数据库中任意的用户名和密码登录即可。

构建基于Dubbox分布式架构应用程序

启动ZooKeeper

编写服务提供者

  1. 导入依赖

     <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>1.5.14.RELEASE</version>
     </parent>
     
     <dependencies>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
     </dependency>
     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-data-jpa</artifactId>
     </dependency>
     <dependency>
     <groupId>com.cjoop</groupId>
     <artifactId>spring-boot-starter-dubbox</artifactId>
     <version>0.0.1</version>
     </dependency>
     <dependency>
     <groupId>org.apache.zookeeper</groupId>
     <artifactId>zookeeper</artifactId>
     <version>3.4.7</version>
     </dependency>
     <dependency>
     <groupId>com.github.sgroschupf</groupId>
     <artifactId>zkclient</artifactId>
     <version>0.1</version>
     </dependency>
     <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <version>5.1.6</version>
     </dependency>
     <dependency>
     <groupId>javax.servlet</groupId>
     <artifactId>jstl</artifactId>
     </dependency>
     <dependency>
     <groupId>org.apache.tomcat.embed</groupId>
     <artifactId>tomcat-embed-jasper</artifactId>
     </dependency>
     <dependency>
     <groupId>c3p0</groupId>
     <artifactId>c3p0</artifactId>
     <version>0.9.1</version>
     </dependency>
     <dependency>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-lang3</artifactId>
     <version>3.4</version>
     </dependency>
     </dependencies>

    这里导入了Dubbox的起步依赖,这样配置起来很方便。

  2. 导入实体类,注意因为要在网络上传输,所以要实现Serializable接口

    @Entity
    @Table(name="t_user")
    public class User implements Serializable
    
    	@Id
    	@GeneratedValue(strategy=GenerationType.IDENTITY)
    	private Integer id;
    	private String username;
    	private String password;
    	
    	public User() 
    	
    
    	public User(Integer id, String username, String password) 
    		this.id = id;
    		this.username = username;
    		this.password = password;
    	
    
    	public User(String username, String password) 
    		this(null, username, password);
    	
    
    	public Integer getId() 
    		return id;
    	
    
    	public void setId(Integer id) 
    		this.id = id;
    	
    
    	public String getUsername() 
    		return username;
    	
    
    	public void setUsername(String username) 
    		this.username = username;
    	
    
    	public String getPassword() 
    		return password;
    	
    
    	public void setPassword(String password) 
    		this.password = password;
    	
    
    	@Override
    	public String toString() 
    		return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
    	
    
  3. 编写DAO

    public interface UserRepository extends JpaRepository<User, Integer>
    
    	User findByUsername(String username);
    
    
  4. <

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