SpringBoot

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SpringBoot

一、 Spring介绍

1.1、SpringBoot简介

在您第1次接触和学习Spring框架的时候,是否因为其繁杂的配置而退却了?在你第n次使用Spring框架的时候,是否觉得一堆反复黏贴的配置有一些厌烦?那么您就不妨来试试使用Spring Boot来让你更易上手,更简单快捷地构建Spring应用!

Spring Boot让我们的Spring应用变的更轻量化。比如:你可以仅仅依靠一个Java类来运行一个Spring引用。你也可以打包你的应用为jar并通过使用java -jar来运行你的Spring Web应用。

Spring Boot的主要优点:

为所有Spring开发者更快的入门

开箱即用,提供各种默认配置来简化项目配置

内嵌式容器简化Web项目

没有冗余代码生成和XML配置的要求

本章主要目标完成Spring Boot基础项目的构建,并且实现一个简单的Http请求处理,通过这个例子对Spring Boot有一个初步的了解,并体验其结构简单、开发快速的特性。

1.2、系统要求:

Java 7及以上

Spring Framework 4.1.5及以上

本文采用Java 1.8.0_73Spring Boot 1.3.2调试通过。

二、快速入门

 

2.1、创建一个Maven工程

名为”springboot-helloworld” 类型为Jar工程项目

 

2.2、pom文件引入依赖

<parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>1.3.3.RELEASE</version>

    </parent>

    <dependencies>

      <!—SpringBoot web 组件 -->

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

    </dependencies>

 

spring-boot-starter-parent作用

在pom.xml中引入spring-boot-start-parent,spring官方的解释叫什么stater poms,它可以提供dependency management,也就是说依赖管理,引入以后在申明其它dependency的时候就不需要version了,后面可以看到。

spring-boot-starter-web作用

springweb 核心组件

spring-boot-maven-plugin作用

 如果我们要直接Main启动spring,那么以下plugin必须要添加,否则是无法启动的。如果使用maven 的spring-boot:run的话是不需要此配置的。(我在测试的时候,如果不配置下面的plugin也是直接在Main中运行的。)

 

2.3、编写HelloWorld服务

创建package命名为com.itmayiedu.controller(根据实际情况修改)

创建HelloController类,内容如下

 

 

@RestController

@EnableAutoConfiguration

publicclass HelloController

     @RequestMapping("/hello")

     public String index()

          return"Hello World";

        

publicstaticvoid main(String[] args)

          SpringApplication.run(HelloController.class, args);

    

2.4、@RestController

在上加上RestController 表示修饰该Controller所有的方法返回JSON格式,直接可以编写

Restful接口

2.5、@EnableAutoConfiguration

注解:作用在于让 Spring Boot   根据应用所声明的依赖来对 Spring 框架进行自动配置
        这个注解告诉Spring Boot根据添加的jar依赖猜测你想如何配置Spring。由于spring-boot-starter-web添加了Tomcat和Spring MVC,所以auto-configuration将假定你正在开发一个web应用并相应地对Spring进行设置。

2.6 SpringApplication.run(HelloController.class, args);

   标识为启动类

2.7、SpringBoot启动方式1

Springboot默认端口号为8080

 

@RestController

@EnableAutoConfiguration

publicclass HelloController

     @RequestMapping("/hello")

     public String index()

          return"Hello World";

        

publicstaticvoid main(String[] args)

          SpringApplication.run(HelloController.class, args);

    

 

 

启动主程序,打开浏览器访问http://localhost:8080/index,可以看到页面输出Hello World

2.8、SpringBoot启动方式2

@ComponentScan(basePackages = "com.itmayiedu.controller")---控制器扫包范围

@ComponentScan(basePackages = "com.itmayiedu.controller")

@EnableAutoConfiguration

public class App

      public static void main(String[] args)

            SpringApplication.run(App.class, args);

     

 

 

 

三、 Web开发

3.1、静态资源访问

在我们开发Web应用的时候,需要引用大量的js、css、图片等静态资源。

默认配置

Spring Boot默认提供静态资源目录位置需置于classpath下,目录名需符合如下规则:

/static

/public

/resources

/META-INF/resources

举例:我们可以在src/main/resources/目录下创建static,在该位置放置一个图片文件。启动程序后,尝试访问http://localhost:8080/D.jpg。如能显示图片,配置成功。

技术图片

在进行行的时候,springboot默认他自动加上了static文件夹

 

3.2、全局捕获异常

@ExceptionHandler 表示拦截异常

  • @ControllerAdvice 是 controller 的一个辅助类,最常用的就是作为全局异常处理的切面类
  • @ControllerAdvice 可以指定扫描范围
  • @ControllerAdvice 约定了几种可行的返回值,如果是直接返回 model 类的话,需要使用 @ResponseBody 进行 json 转换
  • 返回 String,表示跳到某个 view
  • 返回 modelAndView
  • 返回 model + @ResponseBody

 

@ControllerAdvice

public class GlobalExceptionHandler

     @ExceptionHandler(RuntimeException.class)

     @ResponseBody

     public Map<String, Object> exceptionHandler()

          Map<String, Object> map = new HashMap<String, Object>();

          map.put("errorCode", "101");

          map.put("errorMsg", "系統错误!");

          return map;

    

 技术图片

 

3.3、渲染Web页面

 

渲染Web页面

在之前的示例中,我们都是通过@RestController来处理请求,所以返回的内容为json对象。那么如果需要渲染html页面的时候,要如何实现呢?

模板引擎

在动态HTML实现上Spring Boot依然可以完美胜任,并且提供了多种模板引擎的默认配置支持,所以在推荐的模板引擎下,我们可以很快的上手开发动态网站。

Spring Boot提供了默认配置的模板引擎主要有以下几种:

  • Thymeleaf
  • FreeMarker
  • Velocity
  • Groovy
  • Mustache

Spring Boot建议使用这些模板引擎,避免使用JSP,若一定要使用JSP将无法实现Spring Boot的多种特性,具体可见后文:支持JSP的配置

当你使用上述模板引擎中的任何一个,它们默认的模板配置路径为:src/main/resources/templates。当然也可以修改这个路径,具体如何修改,可在后续各模板引擎的配置属性中查询并修改。

3.4、使用Freemarker模板引擎渲染web视图

3.4.1、pom文件引入:

<!-- 引入freeMarker的依赖包. -->

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-freemarker</artifactId>

</dependency>

3.4.2、后台代码

在src/main/resources/创建一个templates文件夹,后缀为*.ftl

     @RequestMapping("/index")

      public String index(Map<String, Object> map)

          map.put("name","美丽的天使...");

            return"index";

     

 技术图片

3.4.3、前台代码

 

<!DOCTYPE html>

<html>

<head lang="en">

<meta charset="UTF-8" />

<title></title>

</head>

<body>

        $name

</body>

</html>

 

技术图片

 

3.4.4、Freemarker其他用法

@RequestMapping("/index")

      public String index(Map<String, Object> map)

          map.put("name","###蚂蚁课堂###");

          map.put("sex",1);

          List<String> userlist=new ArrayList<String>();

          userlist.add("余胜军");

          userlist.add("张三");

          userlist.add("李四");

          map.put("userlist",userlist);

          return"index";

     

<!DOCTYPE html>

<html>

<head lang="en">

<meta charset="UTF-8" />

<title>首页</title>

</head>

<body>

       $name

       <#if sex==1>

           

      <#elseif sex==2>

           

     <#else>

        其他     

      

       </#if>

      

      <#list userlist as user>

        $user

      </#list>

</body>

</html>

 

3.4.5、Freemarker配置

新建application.properties文件

########################################################

###FREEMARKER (FreeMarkerAutoConfiguration)

########################################################

spring.freemarker.allow-request-override=false

spring.freemarker.cache=true

spring.freemarker.check-template-location=true

spring.freemarker.charset=UTF-8

spring.freemarker.content-type=text/html

spring.freemarker.expose-request-attributes=false

spring.freemarker.expose-session-attributes=false

spring.freemarker.expose-spring-macro-helpers=false

#spring.freemarker.prefix=

#spring.freemarker.request-context-attribute=

#spring.freemarker.settings.*=

spring.freemarker.suffix=.ftl

spring.freemarker.template-loader-path=classpath:/templates/

#comma-separated list

#spring.freemarker.view-names= # whitelist of view names that can be resolved

 

3.5、使用JSP渲染Web视图

3.5.1、pom文件引入以下依赖

<parent>

          <groupId>org.springframework.boot</groupId>

          <artifactId>spring-boot-starter-parent</artifactId>

          <version>1.3.3.RELEASE</version>

     </parent>

     <dependencies>

          <!-- SpringBoot 核心组件 -->

          <dependency>

               <groupId>org.springframework.boot</groupId>

               <artifactId>spring-boot-starter-web</artifactId>

          </dependency>

          <dependency>

               <groupId>org.springframework.boot</groupId>

               <artifactId>spring-boot-starter-tomcat</artifactId>

          </dependency>

          <dependency>

               <groupId>org.apache.tomcat.embed</groupId>

               <artifactId>tomcat-embed-jasper</artifactId>

          </dependency>

     </dependencies>

 

3.5.2、在application.properties创建以下配置

spring.mvc.view.prefix=/WEB-INF/jsp/

spring.mvc.view.suffix=.jsp

 

3.5.3、后台代码

@Controller

publicclass IndexController

      @RequestMapping("/index")

      public String index()

            return"index";

     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

四、 数据访问

4.1、springboot整合使用JdbcTemplate

4.1.1 pom文件引入

<parent>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-parent</artifactId>

            <version>1.5.2.RELEASE</version>

      </parent>

      <dependencies>

            <dependency>

                  <groupId>org.springframework.boot</groupId>

                  <artifactId>spring-boot-starter-jdbc</artifactId>

            </dependency>

            <dependency>

                  <groupId>mysql</groupId>

                  <artifactId>mysql-connector-java</artifactId>

                  <version>5.1.21</version>

            </dependency>

            <dependency>

                  <groupId>org.springframework.boot</groupId>

                  <artifactId>spring-boot-starter-test</artifactId>

                  <scope>test</scope>

            </dependency>

            <dependency>

                  <groupId>org.springframework.boot</groupId>

                  <artifactId>spring-boot-starter-web</artifactId>

            </dependency>

      </dependencies>

4.1.2 application.properties新增配置

spring.datasource.url=jdbc:mysql://localhost:3306/test

spring.datasource.username=root

spring.datasource.password=root

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

 

 

4.1.3 UserService类

@Service

publicclass UserServiceImpl implements UserService

      @Autowired

      private JdbcTemplate jdbcTemplate;

      publicvoid createUser(String name, Integer age)

            System.out.println("ssss");

            jdbcTemplate.update("insert into users values(null,?,?);", name, age);

     

 

4.1.4 App类

@ComponentScan(basePackages = "com.itmayiedu")

@EnableAutoConfiguration

publicclass App

    publicstaticvoid main(String[] args)

        SpringApplication.run(App.class, args);

   

 

注意: spring-boot-starter-parent要在1.5以上

4.2、springboot整合使用mybatis

4.2.1、pom文件引入

  <parent>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-parent</artifactId>

            <version>1.3.2.RELEASE</version>

            <relativePath /> <!-- lookup parent from repository -->

      </parent>

      <dependencies>

            <dependency>

                  <groupId>org.springframework.boot</groupId>

                  <artifactId>spring-boot-starter</artifactId>

            </dependency>

            <dependency>

                  <groupId>org.springframework.boot</groupId>

                  <artifactId>spring-boot-starter-test</artifactId>

                  <scope>test</scope>

            </dependency>

            <dependency>

                  <groupId>org.mybatis.spring.boot</groupId>

                  <artifactId>mybatis-spring-boot-starter</artifactId>

                  <version>1.1.1</version>

            </dependency>

            <dependency>

                  <groupId>mysql</groupId>

                  <artifactId>mysql-connector-java</artifactId>

                  <version>5.1.21</version>

            </dependency>

            <dependency>

                  <groupId>org.springframework.boot</groupId>

                  <artifactId>spring-boot-starter-web</artifactId>

            </dependency>

      </dependencies>

 

4.2.2、配置文件引入

spring.datasource.url=jdbc:mysql://localhost:3306/test

spring.datasource.username=root

spring.datasource.password=root

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

 

 

4.2.3、Mapper代码

publicinterface UserMapper

      @Select("SELECT * FROM USERS WHERE NAME = #name")

      User findByName(@Param("name") String name);

      @Insert("INSERT INTO USERS(NAME, AGE) VALUES(#name, #age)")

      int insert(@Param("name") String name, @Param("age") Integer age);

 

 

4.2.4、启动方式

@ComponentScan(basePackages = "com.itmayiedu")

@MapperScan(basePackages = "com.itmayiedu.mapper")

@SpringBootApplication

public class App

     public static void main(String[] args)

          SpringApplication.run(App.class, args);

    

 

 

4.3、springboot整合使用springjpa

4.3.1 pom文件引入依赖

<parent>

          <groupId>org.springframework.boot</groupId>

          <artifactId>spring-boot-starter-parent</artifactId>

          <version>1.4.2.RELEASE</version>

     </parent>

     <dependencies>

          <dependency>

               <groupId>org.springframework.boot</groupId>

               <artifactId>spring-boot-starter-data-jpa</artifactId>

          </dependency>

          <dependency>

               <groupId>mysql</groupId>

               <artifactId>mysql-connector-java</artifactId>

               <version>5.1.21</version>

          </dependency>

          <dependency>

               <groupId>org.springframework.boot</groupId>

               <artifactId>spring-boot-starter-web</artifactId>

          </dependency>

     </dependencies>

 

4.3.2 创建User实体类

@Entity(name = "users")

public class User

      @Id

      @GeneratedValue

      private Integer id;

      @Column

      private String name;

      @Column

      private Integer age;

      // ..get/set方法

 

4.3.3 创建UserDao

public interface UserDao extends JpaRepository<User, Integer>

 

4.3.4 创建IndexController

@RestController

publicclass IndexController

      @Autowired

      private UserDao userDao;

      @RequestMapping("/index")

      public String index(Integer id)

            User findUser = userDao.findOne(id);

            System.out.println(findUser.getName());

            return"success";

     

4.3.5 启动项目

@ComponentScan(basePackages = "com.itmayiedu" )

@EnableJpaRepositories(basePackages = "com.itmayiedu.dao")

@EnableAutoConfiguration

@EntityScan(basePackages = "com.itmayiedu.entity")

public class App

      public static void main(String[] args)

            SpringApplication.run(App.class, args);

     

 

 

 

 

4.4、springboot整合多数据源

同学们思考下,你们在项目中有使用到多数据源吗?

 

 

4.4.1配置文件中新增两个数据源

spring.datasource.test1.driverClassName = com.mysql.jdbc.Driver

spring.datasource.test1.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8

spring.datasource.test1.username = root

spring.datasource.test1.password = root

 

spring.datasource.test2.driverClassName = com.mysql.jdbc.Driver

spring.datasource.test2.url = jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8

spring.datasource.test2.username = root

spring.datasource.test2.password = root

 

4.4.2配置文件中新增两个数据源

@Configuration// 注册到springboot容器中

@MapperScan(basePackages = "com.itmayiedu.user1", sqlSessionFactoryRef = "test1SqlSessionFactory")

publicclass DataSource1Config

 

      /**

       *

       * @methodDesc: 功能描述:(配置test1数据库)

       * @author: 余胜军

       * @param: @return

       * @createTime:2017917下午3:16:44

       * @returnType:@return DataSource

       * @copyright:上海每特教育科技有限公司

       * @QQ:644064779

       */

      @Bean(name = "test1DataSource")

      @Primary

      @ConfigurationProperties(prefix = "spring.datasource.test1")

      public DataSource testDataSource()

            return DataSourceBuilder.create().build();

     

 

      /**

       *

       * @methodDesc: 功能描述:(test1 sql会话工厂)

       * @author: 余胜军

       * @param: @param

       *             dataSource

       * @param: @return

       * @param: @throws

       *             Exception

       * @createTime:2017917下午3:17:08

       * @returnType:@param dataSource

       * @returnType:@return

       * @returnType:@throws Exception SqlSessionFactory

       * @copyright:上海每特教育科技有限公司

       * @QQ:644064779

       */

      @Bean(name = "test1SqlSessionFactory")

      @Primary

      public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource)

                  throws Exception

            SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

            bean.setDataSource(dataSource);

//          bean.setMapperLocations(

//                       new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test1/*.xml"));

            returnbean.getObject();

     

 

      /**

       *

       * @methodDesc: 功能描述:(test1 事物管理)

       * @author: 余胜军

       * @param: @param

       *             dataSource

       * @param: @return

       * @param: @throws

       *             Exception

       * @createTime:2017917下午3:17:08

       * @returnType:@param dataSource

       * @returnType:@return

       * @returnType:@throws Exception SqlSessionFactory

       * @copyright:上海每特教育科技有限公司

       * @QQ:644064779

       */

      @Bean(name = "test1TransactionManager")

      @Primary

      public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource)

            returnnew DataSourceTransactionManager(dataSource);

     

 

      @Bean(name = "test1SqlSessionTemplate")

      public SqlSessionTemplate testSqlSessionTemplate(

                  @Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception

            returnnew SqlSessionTemplate(sqlSessionFactory);

     

 

 

4.4.2创建分包Mapper

public interface User1Mapper

     @Insert("insert into users values(null,#name,#age);")

     public int addUser(@Param("name") String name, @Param("age") Integer age);

4.4.3启动项目

@ComponentScan(basePackages = "com.itmayiedu")

@EnableAutoConfiguration

publicclass App

      publicstaticvoid main(String[] args)

            SpringApplication.run(App.class, args);

     

 

 

 

 

 

No qualifying bean of type [javax.sql.DataSource] is defined: expected single matching bean but found 2: test1DataSource,test2DataSource

五、 事物管理

5.1.1springboot整合事物管理

 springboot默认集成事物,只主要在方法上加上@Transactional即可

5.1.2SpringBoot分布式事物管理

使用springboot+jta+atomikos 分布式事物管理

5.1.2.1新增配置文件信息

<dependency>

      <groupId>org.springframework.boot</groupId>

      <artifactId>spring-boot-starter-jta-atomikos</artifactId>

</dependency>

 

5.1.2.2新增配置文件信息

# Mysql 1

mysql.datasource.test.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8

mysql.datasource.test.username = root

mysql.datasource.test.password = root

 

mysql.datasource.test.minPoolSize = 3

mysql.datasource.test.maxPoolSize = 25

mysql.datasource.test.maxLifetime = 20000

mysql.datasource.test.borrowConnectionTimeout = 30

mysql.datasource.test.loginTimeout = 30

mysql.datasource.test.maintenanceInterval = 60

mysql.datasource.test.maxIdleTime = 60

mysql.datasource.test.testQuery = select1

 

 

# Mysql 2

mysql.datasource.test2.url =jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8

mysql.datasource.test2.username =root

mysql.datasource.test2.password =root

 

mysql.datasource.test2.minPoolSize = 3

mysql.datasource.test2.maxPoolSize = 25

mysql.datasource.test2.maxLifetime = 20000

mysql.datasource.test2.borrowConnectionTimeout = 30

mysql.datasource.test2.loginTimeout = 30

mysql.datasource.test2.maintenanceInterval = 60

mysql.datasource.test2.maxIdleTime = 60

mysql.datasource.test2.testQuery = select1

 

 

5.1.2.3 读取配置文件信息

package com.itmayiedu.config;

 

import org.springframework.boot.context.properties.ConfigurationProperties;

 

@ConfigurationProperties(prefix = "mysql.datasource.test")

publicclass DBConfig1

 

      private String url;

      private String username;

      private String password;

      privateintminPoolSize;

      privateintmaxPoolSize;

      privateintmaxLifetime;

      privateintborrowConnectionTimeout;

      privateintloginTimeout;

      privateintmaintenanceInterval;

      privateintmaxIdleTime;

      private String testQuery;

package com.itmayiedu.config;

 

import org.springframework.boot.context.properties.ConfigurationProperties;

 

@ConfigurationProperties(prefix = "mysql.datasource.test1")

publicclass DBConfig2

 

      private String url;

      private String username;

      private String password;

      privateintminPoolSize;

      privateintmaxPoolSize;

      privateintmaxLifetime;

      privateintborrowConnectionTimeout;

      privateintloginTimeout;

      privateintmaintenanceInterval;

      privateintmaxIdleTime;

      private String testQuery;

 

 

 

 

5.1.2.4 创建多数据源

@Configuration

// basePackages 最好分开配置如果放在同一个文件夹可能会报错

@MapperScan(basePackages = "com.itmayiedu.test01", sqlSessionTemplateRef = "testSqlSessionTemplate")

publicclass TestMyBatisConfig1

 

      // 配置数据源

      @Primary

      @Bean(name = "testDataSource")

      public DataSource testDataSource(DBConfig1 testConfig) throws SQLException

            MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();

            mysqlXaDataSource.setUrl(testConfig.getUrl());

            mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

            mysqlXaDataSource.setPassword(testConfig.getPassword());

            mysqlXaDataSource.setUser(testConfig.getUsername());

            mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

 

            AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();

            xaDataSource.setXaDataSource(mysqlXaDataSource);

            xaDataSource.setUniqueResourceName("testDataSource");

 

            xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());

            xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());

            xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());

            xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());

            xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());

            xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());

            xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());

            xaDataSource.setTestQuery(testConfig.getTestQuery());

            returnxaDataSource;

     

 

      @Bean(name = "testSqlSessionFactory")

      public SqlSessionFactory testSqlSessionFactory(@Qualifier("testDataSource") DataSource dataSource)

                  throws Exception

            SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

            bean.setDataSource(dataSource);

            returnbean.getObject();

     

 

      @Bean(name = "testSqlSessionTemplate")

      public SqlSessionTemplate testSqlSessionTemplate(

                  @Qualifier("testSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception

            returnnew SqlSessionTemplate(sqlSessionFactory);

     

 

package com.itmayiedu.datasource;

 

import java.sql.SQLException;

 

import javax.sql.DataSource;

 

import org.apache.ibatis.session.SqlSessionFactory;

import org.mybatis.spring.SqlSessionFactoryBean;

import org.mybatis.spring.SqlSessionTemplate;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import com.atomikos.jdbc.AtomikosDataSourceBean;

import com.itmayiedu.config.DBConfig1;

import com.mysql.jdbc.jdbc2.optional.MysqlXADataSource;

 

@Configuration

// basePackages 最好分开配置如果放在同一个文件夹可能会报错

@MapperScan(basePackages = "com.itmayiedu.test02", sqlSessionTemplateRef = "test2SqlSessionTemplate")

publicclass TestMyBatisConfig2

 

      // 配置数据源

      @Bean(name = "test2DataSource")

      public DataSource testDataSource(DBConfig1 testConfig) throws SQLException

            MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();

            mysqlXaDataSource.setUrl(testConfig.getUrl());

            mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

            mysqlXaDataSource.setPassword(testConfig.getPassword());

            mysqlXaDataSource.setUser(testConfig.getUsername());

            mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

 

            AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();

            xaDataSource.setXaDataSource(mysqlXaDataSource);

            xaDataSource.setUniqueResourceName("test2DataSource");

 

            xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());

            xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());

            xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());

            xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());

            xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());

            xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());

            xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());

            xaDataSource.setTestQuery(testConfig.getTestQuery());

            returnxaDataSource;

     

 

      @Bean(name = "test2SqlSessionFactory")

      public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource)

                  throws Exception

            SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

            bean.setDataSource(dataSource);

            returnbean.getObject();

     

 

      @Bean(name = "test2SqlSessionTemplate")

      public SqlSessionTemplate testSqlSessionTemplate(

                  @Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception

            returnnew SqlSessionTemplate(sqlSessionFactory);

     

 

5.1.2.4 启动加载配置

@EnableConfigurationProperties(value = DBConfig1.class, DBConfig2.class )

 

 

六、 日志管理

6.1使用log4j记录日志

6.1.2新建log4j配置文件

#log4j.rootLogger=CONSOLE,info,error,DEBUG

log4j.rootLogger=info,error,CONSOLE,DEBUG

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender    

log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout    

log4j.appender.CONSOLE.layout.ConversionPattern=%dyyyy-MM-dd-HH-mm[%t][%c][%p]-%m%n    

log4j.logger.info=info

log4j.appender.info=org.apache.log4j.DailyRollingFileAppender

log4j.appender.info.layout=org.apache.log4j.PatternLayout    

log4j.appender.info.layout.ConversionPattern=%dyyyy-MM-dd-HH-mm[%t][%c][%p]-%m%n 

log4j.appender.info.datePattern=‘.‘yyyy-MM-dd

log4j.appender.info.Threshold = info  

log4j.appender.info.append=true  

#log4j.appender.info.File=/home/admin/pms-api-services/logs/info/api_services_info

log4j.appender.info.File=/Users/dddd/Documents/testspace/pms-api-services/logs/info/api_services_info

log4j.logger.error=error 

log4j.appender.error=org.apache.log4j.DailyRollingFileAppender

log4j.appender.error.layout=org.apache.log4j.PatternLayout    

log4j.appender.error.layout.ConversionPattern=%dyyyy-MM-dd-HH-mm[%t][%c][%p]-%m%n 

log4j.appender.error.datePattern=‘.‘yyyy-MM-dd

log4j.appender.error.Threshold = error  

log4j.appender.error.append=true  

#log4j.appender.error.File=/home/admin/pms-api-services/logs/error/api_services_error

log4j.appender.error.File=/Users/dddd/Documents/testspace/pms-api-services/logs/error/api_services_error

log4j.logger.DEBUG=DEBUG

log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender

log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout    

log4j.appender.DEBUG.layout.ConversionPattern=%dyyyy-MM-dd-HH-mm[%t][%c][%p]-%m%n 

log4j.appender.DEBUG.datePattern=‘.‘yyyy-MM-dd

log4j.appender.DEBUG.Threshold = DEBUG  

log4j.appender.DEBUG.append=true  

#log4j.appender.DEBUG.File=/home/admin/pms-api-services/logs/debug/api_services_debug

log4j.appender.DEBUG.File=/Users/dddd/Documents/testspace/pms-api-services/logs/debug/api_services_debug

 

 

 

6.2使用AOP统一处理Web请求日志

6.2.1POM文件新增依赖

    <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-aop</artifactId>

    </dependency>

 

6.2.2POM文件新增依赖

@Aspect

@Component

publicclass WebLogAspect

      private Logger logger = LoggerFactory.getLogger(getClass());

      @Pointcut("execution(public * com.itmayiedu.controller..*.*(..))")

      publicvoid webLog()

     

      @Before("webLog()")

      publicvoid doBefore(JoinPoint joinPoint) throws Throwable

            // 接收到请求,记录请求内容

            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();

            HttpServletRequest request = attributes.getRequest();

            // 记录下请求内容

            logger.info("URL : " + request.getRequestURL().toString());

            logger.info("HTTP_METHOD : " + request.getMethod());

            logger.info("IP : " + request.getRemoteAddr());

            Enumeration<String> enu = request.getParameterNames();

            while (enu.hasMoreElements())

                  String name = (String) enu.nextElement();

                  logger.info("name:,value:", name, request.getParameter(name));

           

     

      @AfterReturning(returning = "ret", pointcut = "webLog()")

      publicvoid doAfterReturning(Object ret) throws Throwable

            // 处理完请求,返回内容

            logger.info("RESPONSE : " + ret);

     

 

 

七、 缓存支持

7.1注解配置与EhCache使用

7.1.1 pom文件引入

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-cache</artifactId>

</dependency>

 

7.1.2新建ehcache.xml 文件

<?xml version="1.0" encoding="UTF-8"?>

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"

    updateCheck="false">

    <diskStore path="java.io.tmpdir/Tmp_EhCache" />

 

    <!-- 默认配置 -->

    <defaultCache maxElementsInMemory="5000" eternal="false"

        timeToIdleSeconds="120" timeToLiveSeconds="120"

        memoryStoreEvictionPolicy="LRU" overflowToDisk="false" />

 

    <cache name="baseCache" maxElementsInMemory="10000"

        maxElementsOnDisk="100000" />

 

</ehcache>

配置信息介绍

  1.     <!--  
  2.        name:缓存名称。  
  3.        maxElementsInMemory:缓存最大个数。  
  4.        eternal:对象是否永久有效,一但设置了,timeout将不起作用。  
  5.        timeToIdleSeconds:设置对象在失效前的允许闲置时间(单位:秒)。仅当eternal=false对象不是永久有效时使用,可选属性,默认值是0,也就是可闲置时间无穷大。  
  6.        timeToLiveSeconds:设置对象在失效前允许存活时间(单位:秒)。最大时间介于创建时间和失效时间之间。仅当eternal=false对象不是永久有效时使用,默认是0.,也就是对象存活时间无穷大。  
  7.        overflowToDisk:当内存中对象数量达到maxElementsInMemory时,Ehcache将会对象写到磁盘中。  
  8.        diskSpoolBufferSizeMB:这个参数设置DiskStore(磁盘缓存)的缓存区大小。默认是30MB。每个Cache都应该有自己的一个缓冲区。  
  9.        maxElementsOnDisk:硬盘最大缓存个数。  
  10. 10.        diskPersistent:是否缓存虚拟机重启期数据 Whether the disk store persists between restarts of the Virtual Machine. The default value is false.  
  11. 11.        diskExpiryThreadIntervalSeconds:磁盘失效线程运行时间间隔,默认是120秒。  
  12. 12.        memoryStoreEvictionPolicy:当达到maxElementsInMemory限制时,Ehcache将会根据指定的策略去清理内存。默认策略是LRU(最近最少使用)。你可以设置为FIFO(先进先出)或是LFU(较少使用)。  
  13. 13.        clearOnFlush:内存数量最大时是否清除。  
  14. 14.     --> 

 

 

 

 

7.1.3代码使用Cacheable

@CacheConfig(cacheNames = "baseCache")

publicinterface UserMapper

      @Select("select * from users where name=#name")

      @Cacheable

      UserEntity findName(@Param("name") String name);

7.1.4清除缓存

@Autowired

private CacheManager cacheManager;

@RequestMapping("/remoKey")

publicvoid remoKey()

      cacheManager.getCache("baseCache").clear();

 

 

 

 

使用Redis做集中式缓存

 

八、 其他内容

 

8.1、使用@Scheduled创建定时任务

在Spring Boot的主类中加入@EnableScheduling注解,启用定时任务的配置

@Component

public class ScheduledTasks

    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");

    @Scheduled(fixedRate = 5000)

    public void reportCurrentTime()

        System.out.println("现在时间:" + dateFormat.format(new Date()));

   

 

 

8.2、使用@Async实现异步调用

启动加上@EnableAsync ,需要执行异步方法上加入 @Async

8.3、自定义参数

配置文件值

name=itmayiedu.com

 

配置文件值

      @Value("$name")

      private String name;

@ResponseBody

      @RequestMapping("/getValue")

      public String getValue()

            returnname;

     

 

8.4、多环境配置

spring.profiles.active=pre

 

application-dev.properties:开发环境

application-test.properties:测试环境

application-prod.properties:生产环境

8.5、修改端口号

server.port=8888

server.context-path=/itmayiedu

8.6、SpringBoot yml 使用

创建application.yml

server:

  port:  8090

  context-path: /itmayiedu

 

 

8.7、发布打包

使用mvn package 打包

使用java –jar 包名

如果报错没有主清单,在pom文件中新增

  <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>1.8</source>

                    <target>1.8</target>

                </configuration>

            </plugin>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

                <configuration>

                    <maimClass>com.itmayiedu.app.App</maimClass>

                </configuration>

                <executions>

                    <execution>

                         <goals>

                             <goal>repackage</goal>

                         </goals>

                    </execution>

                </executions>

 

            </plugin>

        </plugins>

    </build>

 

 

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