SSM整合步骤

Spring和Mybatis整合

1. 加入Spring和mybatis的依赖

<!-- Spring相关依赖 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>5.2.0.RELEASE</version>
</dependency>

<!-- mybatis相关依赖 -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.6</version>
</dependency>

<!-- Spring、Mybatis整合依赖 -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.2</version>
</dependency>

<!-- mysql驱动 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.47</version>
</dependency>

2.在Spring bean配置文件中，配置整合的Bean

在类路径下新建applicationContext.xml文件，做如下配置：

1）配置数据源

<context:property-placeholder location="classpath*:/jdbc.properties" />
<!-- 连接池 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${jdbc.driver}" />
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
</bean>

2）配置SqlSessionFactoryBean

<bean class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="typeAliasesPackage" value="com.lanou3g.ssm.bean" />
    <property name="mapperLocations" value="classpath*:/mybatis/mappers/*.xml" />
</bean>

3.编写mybatis的mapper映射文件、mapper接口、核心配置文件(可选)

mapper映射文件和mapper接口可直接用mybatis逆向工程生成

4.配置扫描包路径

<context:component-scan base-package="com.lanou3g.ssm.service"  />

5.配置mapper接口扫描路径

<mybatis:scan base-package="com.lanou3g.ssm.mapper" />

作用是让mybatis去指定的包下找Mapper接口，生成实现类，注入到IOC容器中

Spring和SpringMVC

1.添加SpringMVC依赖和Servlet、JSTL依赖

<!-- SpringMVC依赖 -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.2.0.RELEASE</version>
</dependency>
<!-- Servlet api 依赖 -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

2.配置SpringMVC

web.xml

<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_3_1.xsd"
         version="3.1">

  <!-- 配置root applicationContext -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:application*.xml</param-value>
  </context-param>

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!-- 配置请求编码 -->
  <filter>
    <filter-name>charchaterFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>charchaterFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- 配置DispatcherServlet大总管 -->
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>

dispatcher-servlet.xml

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

    <!-- 配置扫描Controller的包路径 -->
    <context:component-scan base-package="com.lanou3g.ssm.web" />

    <!-- 配置视图解析器 -->
    <mvc:view-resolvers>
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/" />
            <property name="suffix" value=".jsp" />
        </bean>
    </mvc:view-resolvers>

    <!-- 开启SpringMVC注解支持 -->
    <mvc:annotation-driven>
        <!-- 配置消息转换器，将REST返回的对象类型转成JSON -->
        <mvc:message-converters>
            <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                <property name="defaultCharset" value="UTF-8" />
                <property name="supportedMediaTypes">
                    <list>
                        <!-- 这里配置的text/html主要是解决IE浏览器请求JSON会弹出下载框的问题 -->
                        <value>text/html</value>
                        <value>application/json</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

    <!-- 静态资源放行 -->
    <mvc:resources mapping="/static/**" location="/static/" />
</beans>

至此，SSM三个框架就整合完成了。 可以编写自己的service代码和controller层代码。

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