# SSM整合


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整合策略

- 先Spring + Mybatis
- 再整合Spring mvc

示例需求：查询user表全部数据并展示的页面

## 1. Spring + Mybatis

- 整合目标

  - 数据库连接池及事务管理器都交给Spring容器完成
  - SqlSessionFactory对象放到Spring容器中，作为单例对象管理
  - Mapper动态代理对象交给Spring管理，我们从容器中直接获得Mapper代理对象

- 整合所需依赖

  - junit
  - mybatis
  - Spring(spring-context,spring-test,spring-jdbc,spring-tx,spring-aop,aspectjweaver)
  - Mybatis-spring-**.jar
  - mysql驱动
  - Druid数据库连接池

- pom

  看示例代码 **ssm-demo**  [https://gitee.com/ixinglan/spring-demo.git](https://gitee.com/ixinglan/spring-demo.git) 

  ![示意图](https://img.zhaojq.top/20260727091651888.png "示意图")



## 2.整合Srpign MVC

- pom

  ```xml
  <dependencies>
  <!--        junit-->
  <!--        mybatis-->
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis</artifactId>
              <version>3.4.5</version>
          </dependency>
  
  <!--        spring, 父pom中有的，这里不重复添加-->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-test</artifactId>
              <version>5.1.12.RELEASE</version>
          </dependency>
  
  <!--        mybatis-spring-->
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis-spring</artifactId>
              <version>2.0.3</version>
          </dependency>
  
  <!--        mysql-connector-java-->
  <!--        druid-->
  
  <!--        spring webmvc-->
  <!--        servlet-api-->
  <!--        jsp-api-->
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>jsp-api</artifactId>
              <version>2.0</version>
          </dependency>
  
  <!--        jstl表达式-->
          <dependency>
              <groupId>jstl</groupId>
              <artifactId>jstl</artifactId>
              <version>1.2</version>
          </dependency>
          <dependency>
              <groupId>taglibs</groupId>
              <artifactId>standard</artifactId>
              <version>1.1.2</version>
          </dependency>
  
  <!--        jackson-core-->
  <!--        jackson-databind-->
  <!--        jackson-annotations-->
      </dependencies>
  ```

- controller

  ```java
  @Controller
  @RequestMapping("/account")
  public class AccountController {
  
      /**
       * Spring容器和SpringMVC容器是有层次的（父子容器）
       * Spring容器：service对象+dao对象
       * SpringMVC容器：controller对象，，，，可以引用到Spring容器中的对象
       */
  
  
      @Autowired
      private AccountService accountService;
  
      @RequestMapping("/queryAll")
      @ResponseBody
      public List<Account>  queryAll() throws Exception {
          return accountService.queryAccountList();
      }
  
  }
  ```

- springmvc.sml

  ```xml
  <?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:context="http://www.springframework.org/schema/context"
         xmlns:tx="http://www.springframework.org/schema/tx"
         xmlns:mvc="http://www.springframework.org/schema/mvc"
         xsi:schemaLocation="
         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
  ">
      <context:component-scan base-package="org.ssm.demo.controller"/>
  
      <!--配置springmvc注解驱动，自动注册合适的组件handlerMapping和handlerAdapter-->
      <mvc:annotation-driven/>
  </beans>
  ```

- web.xml

  ```xml
  <?xml version="1.0" encoding="UTF-8"?>
  <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
           version="4.0">
      <display-name>ssm demo</display-name>
      <context-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath*:applicationContext*.xml</param-value>
      </context-param>
  <!--    spring框架启动-->
      <listener>
          <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
  
  <!--    springmvc启动-->
      <servlet>
          <servlet-name>springmvc</servlet-name>
          <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
          <init-param>
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath*:springmvc.xml</param-value>
          </init-param>
          <load-on-startup>1</load-on-startup>
      </servlet>
      
      <servlet-mapping>
          <servlet-name>springmvc</servlet-name>
          <url-pattern>/</url-pattern>
      </servlet-mapping>
  </web-app>
  ```