SSM整合

Posted 2021-08-07 m0_56426304

目录

SSM 整合

环境准备

整合步骤

---

SSM 整合

环境准备

1 创建数据库和表结构

create database ssm;
create table account(
id int primary key auto_increment,
name varchar(100),
money double(7,2),
);

2 创建 Maven 工程

创建子模块：

ssm_domain     jar

ssm_dao          jar

ssm_service     jar

ssm_web          war

3 导入坐标并建立依赖

注意 MyBatis 和 Spring 的版本对应关系：

<project
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itheima</groupId>
<artifactId>ssm</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<properties>
<spring.version>5.0.2.RELEASE</spring.version>
<slf4j.version>1.6.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
<shiro.version>1.2.3</shiro.version>
<mysql.version>5.1.6</mysql.version>
<mybatis.version>3.4.5</mybatis.version>
</properties>
<dependencies>
<!-- spring -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.8</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- log start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- log end -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
<finalName>ssm</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
<showWarnings>true</showWarnings>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<modules>
<module>ssm_domain</module>
<module>ssm_dao</module>
<module>ssm_service</module>
<module>ssm_web</module>
</modules>
</project>

4 编写实体类

/**
* 账户的实体类
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
public class Account implements Serializable {
private Integer id;
private String name;
private Float money;
public Integer getId() {
return id;
}
public void setId(Integer id) { this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Float getMoney() {
return money;
}
public void setMoney(Float money) {
this.money = money;
}
@Override
public String toString() {
return "Account [id=" + id + ", name=" + name + ", money=" + money + "]";
}
}

5 编写业务层接口

/**
* 账户的业务层接口
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
public interface IAccountService {
/**
* 保存账户
* @param account
*/
void saveAccount(Account account);
/**
* 查询所有账户
* @return
*/
List<Account> findAllAccount();
}

6 编写持久层接口

/**
* 账户的持久层接口
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
public interface IAccountDao {
/**
* 保存
* @param account
*/
void save(Account account);
/**
* 查询所有
* @return
*/
List<Account> findAll();
}

整合步骤

1 保证 Spring 框架在 web 工程中独立运行

1.1 第一步：编写 spring 配置文件并导入约束

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置 spring 创建容器时要扫描的包 -->
<context:component-scan base-package="com.itheima">
<!--制定扫包规则，不扫描@Controller 注解的 JAVA 类，其他的还是要扫描 -->
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
</context:component-scan>
</beans>

1.2 第二步：使用注解配置业务层和持久层

/**
* 账户的业务层实现类
*/
@Service("accountService")
public class AccountServiceImpl implements IAccountService {
@Autowired
private IAccountDao accountDao;
@Override
public List<Account> findAllAccount() {
return accountDao.findAllAccount();
}
@Override
public void saveAccount(Account account) {
accountDao.saveAccount
}
}

持久层实现类代码：

此时不要做任何操作，就输出一句话。目的是测试 spring 框架搭建的结果。

/**
* 账户的持久层实现类
*/
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {
@Override
public List<Account> findAllAccount() {
System.out.println("查询了所有账户");
return null;
}
@Override
public void saveAccount(Account account) {
System.out.println("保存了账户");
}
}

1.3 第三步：测试 spring 能否独立运行

/**
* 测试 spring 环境搭建是否成功
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
public class Test01Spring {
public static void main(String[] args) {
ApplicationContext
ac
=
new
ClassPathXmlApplicationContext("applicationContext.xml");
IAccountService as = ac.getBean("accountService",IAccountService.class);
as.findAllAccount();
}
}

2 保证 SpringMVC 在 web 工程中独立运行

   2.1 第一步：在 web.xml 中配置核心控制器（ DispatcherServlet ）

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>ssm_web</display-name>
<!-- 配置 spring mvc 的核心控制器 -->
<servlet>
<servlet-name>springmvcDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置初始化参数，用于读取 springmvc 的配置文件 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!-- 配置 servlet 的对象的创建时间点：应用加载时创建。取值只能是非 0 正整数，表示启动顺
序 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvcDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 配置 springMVC 编码过滤器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-cla
ss>
<!-- 设置过滤器中的属性值 -->
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<!-- 启动过滤器 -->
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<!-- 过滤所有请求 -->
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>

  2.2 第二步：编写 SpringMVC 的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置创建 spring 容器要扫描的包 -->
<context:component-scan base-package="com.itheima">

<!-- 制定扫包规则 ,只扫描使用@Controller 注解的 JAVA 类 -->
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
</context:component-scan>

<!-- 配置视图解析器 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="prefix" value="/WEB-INF/pages/"></property>

<property name="suffix" value=".jsp"></property>
</bean>

<mvc:annotation-driven></mvc:annotation-driven>
</beans>

  2.3 第三步：编写 Controller 和 jsp 页面

jsp 代码：

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>主页</title>
</head>
<body>
<a href="account/findAllAccount">访问查询账户</a>
</body>
</html>

控制器代码：

/**
* 账户的控制器
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
@Controller("accountController")
@RequestMapping("/account")
public class AccountController {
@RequestMapping("/findAllAccount")
public String findAllAccount() {
System.out.println("执行了查询账户");
return "success";
}
}

3 整合 Spring 和 SpringMVC

  3.1 第一步：配置监听器实现启动服务创建容器

<!-- 配置 spring 提供的监听器，用于启动服务时加载容器 。
该间监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件 -->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<!-- 手动指定 spring 配置文件位置 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

4 保证 MyBatis 框架在 web 工程中独立运行

  4.1 第一步：编写 AccountDao 映射配置文件

注意：我们使用代理 dao 的方式来操作持久层，所以此处 Dao 的实现类就是多余的了。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itheima.dao.IAccountDao">
<!-- 查询所有账户 -->
<select id="findAll" resultType="com.itheima.domain.Account">
select * from account
</select>
<!-- 新增账户 -->
<insert id="save" parameterType="com.itheima.domain.Account">
insert into account(name,money) values(#{name},#{money});
</insert>
</mapper>

  4.2 第二步：编写 SqlMapConfig 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<properties resource="jdbcConfig.properties"></properties>
<environments default="mysql">
<environment id="mysql">
<transactionManager type="JDBC"></transactionManager>
<dataSource type="pooled">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/itheima/dao/AccountDao.xml"/>
</mappers>
</configuration>

properties 文件中的内容：

jdbc.driver=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3306/ssm

jdbc.username=root

jdbc.password=1234

  4.3 第三步：测试运行结果

   测试类代码：

/**
* 测试 MyBatis 独立使用
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
public class Test02MyBatis {
/**
* 测试保存
* @param args
* @throws Exception
*/
@Test
public void testSave() throws Exception {
Account account = new Account();
account.setName("test");
account.setMoney(5000f);
InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
SqlSession session= factory.openSession();
IAccountDao aDao = session.getMapper(IAccountDao.class);
aDao.save(account);
session.commit();
session.close();
in.close();
}
/**
* 测试查询
* @param args
* @throws Exception
*/
@Test
public void testFindAll() throws Exception{
InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
SqlSession session= factory.openSession();
IAccountDao aDao = session.getMapper(IAccountDao.class);
List<Account> list = aDao.findAll();
System.out.println(list);
session.close();
in.close();
}
}

5 整合 Spring 和 MyBatis

整合思路：

把 mybatis 配置文件（ SqlMapConfig.xml ）中内容配置到 spring 配置文件中同时，把 mybatis 配置文件的内容清掉。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>

注意：

由于我们使用的是代理 Dao 的模式， Dao 具体实现类由 MyBatis 使用代理方式创建，所以此时 mybatis 配置文件不能删。

当我们整合 spring 和 mybatis 时， mybatis 创建的 Mapper.xml 文件名必须和 Dao 接口文件名一致

  5.1 第一步： Spring 接管 MyBatis 的 Session 工厂

<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jdbcConfig.properties" />
<!-- 配置 MyBatis 的 Session 工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 数据库连接池 -->
<property name="dataSource" ref="dataSource" />
<!-- 加载 mybatis 的全局配置文件 -->
<property name="configLocation" value="classpath:SqlMapConfig.xml" />
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"></property>
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="user" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>

  5.2 第二步：配置自动扫描所有 Mapper 接口和文件

<!-- 配置 Mapper 扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.itheima.dao"/>
</bean>

  5.3 第三步：配置 spring 的事务

<!-- 配置事务管理器 -->
<bean
id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置事务的通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED" read-only="false"/>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- 配置 aop -->
<aop:config>
<!-- 配置切入点表达式 -->
<aop:pointcut
expression="execution(* com.itheima.service.impl.*.*(..))"
id="pt1"/>
<!-- 建立通知和切入点表达式的关系 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
</aop:config>

  5.4 第四步：测试整合结果

/**
* 测试 spring 整合 mybatis
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations= {"classpath:applicationContext.xml"})
public class Test03SpringMabatis {
@Autowired
private IAccountService accountService;
@Test
public void testFindAll() {
List list = accountService.findAllAccount();
System.out.println(list);
}
@Test
public void testSave() {
Account account = new Account();
account.setName("测试账号");
account.setMoney(1234f);
accountService.saveAccount(account);
}
}

6 测试 SSM 整合结果

  6.1 编写测试 jsp

请求发起页面：

<%@
page
language="java"
contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>主页</title>
</head>
<body>
<a href="account/findAllAccount">访问查询账户</a>
<hr/>
<form action="account/saveAccount" method="post">
账户名称：<input type="text" name="name"/><br/>
账户金额：<input type="text" name="money"><br/>
<input type="submit" value="保存"/>
</form>
</body>
</html>

响应结果页面：

<%@
page
language="java"
contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!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>账户的列表页面</title>
</head>
<body>
<table border="1" width="300px">
<tr>
<th>编号</th>
<th>账户名称</th>
<th>账户金额</th>
</tr>
<c:forEach items="${accounts}" var="account" varStatus="vs">
<tr>
<td>${vs.count}</td>
<td>${account.name }</td>
<td>${account.money }</td>
</tr>
</c:forEach>
</table>
</body>
</html>

  6.2 修改控制器中的方法

/**
* 账户的控制器
* @author 黑马程序员
* @Company http://www.ithiema.com
* @Version 1.0
*/
@Controller("accountController")
@RequestMapping("/account")
public class AccountController {
@Autowired
private IAccountService accountService;
/**
* 查询所有账户
* @return
*/
@RequestMapping("/findAllAccount")
public ModelAndView findAllAccount() {
List<Account> accounts = accountService.findAllAccount();
ModelAndView mv = new ModelAndView();
mv.addObject("accounts", accounts);
mv.setViewName("accountlist");
return mv;
}
/**
* 保存账户
* @param account
* @return
*/