SSM整合

SSM整合

1.需要的依赖

<dependencies>
    <!--springMVC-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.1.8.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>5.1.8.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>5.1.8.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>5.1.8.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.1.8.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>5.1.8.RELEASE</version>
    </dependency>
    <!--jackson-->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.9.8</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.9.8</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.9.8</version>
    </dependency>
    <!--mysql-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.16</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.13</version>
    </dependency>
    <!--mybatis-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.1</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.1</version>
    </dependency>
    <!-- jstl -->
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>


    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.2</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.12</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
</dependencies>

2.SM整合

通过让spring接管mybatis的核心对象sqlSessionFactory对象，进行创建

  1. 配置spring工厂监听器

    在web.xml的web-app标签内配置如下

    <!--配置spring工厂监听器-->
<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--配置spring工厂配置文件位置-->
<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:config/spring.xml</param-value>
</context-param>

  2. 开启注解扫描

    在resources目录下创建config目录，再创建spring.xml配置文件。对应的web.xml中contextConfigLocation的值

    然后开启注解扫描，base-package指定要扫描的包。

    <!--开启注解扫描-->
<context:component-scan base-package="cn.wsq.ssm"/>

  3. 创建数据源对象

    在resources目录下创建db.properties

    #db.properties
jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql://127.0.0.1:3306/jsp?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
jdbc.user=root
jdbc.password=123456

    <!--加载配置文件-->
<context:property-placeholder location="classpath:db.properties"/>
<!--创建数据源对象-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="driverClassName" value="${jdbc.driverClass}"/>
    <property name="url" value="${jdbc.jdbcUrl}"/>
    <property name="username" value="${jdbc.user}"/>
    <property name="password" value="${jdbc.password}"/>
</bean>

  4. 创建sqlSessionFactory对象

    这里直接取消了mybatis的配置文件，mybatis的一切配置，可以由SqlSessionFactoryBean和Configuration共同完成。

    <!--创建sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="mapperLocations" value="classpath:mapper/*Mapper.xml"/>
    <!--注入configuration，得到mybatis的其他配置项（-->
    <property name="configuration" ref="configuration"/>
</bean>
<bean id="configuration" class="org.apache.ibatis.session.Configuration">
    <property name="mapUnderscoreToCamelCase" value="true"/>
</bean>

  5. 扫描dao/mapper对象

    需要为MapperScannerConfigurer注入sqlSessionFactory，需要指定扫描的包（mapper接口所在的包）

    <!--创建mapper-dao-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    <property name="basePackage" value="cn.wsq.ssm.mapper"/>
</bean>

  6. 创建事务管理器DataSourceTransactionManager

    <!--创建数据源事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
</bean>

  7. 开启注解式事务

    这样开启注解式事务，就省去了切面配置事务，直接使用@Transactional注解即可指定事务

    <!--开启注解式事务生效-->
<tx:annotation-driven transaction-manager="transactionManager"/>

  8. 配置aop

    <!--配置aop-->
  <!--注册通知类-->
   <!--前置通知-->
<bean id="myBeforeAdvice" class="cn.wsq.ssm.advices.MyBeforeAdvice"/>
<!--环绕通知-->
<bean id="logAdvice" class="cn.wsq.ssm.advices.LogAdvice"/>
<!--组装切面-->
<aop:config>
    <!--配置切入点
            id:切入点在工程中(spring.xml)的唯一标识
            expression: 用来指定切入项目中的哪些组件中的哪些方法 精确到方法级别
            within: 用来指定切入项目中的哪些组件中的哪些方法 精确到类级别 效率要高些
    -->
<!-- 
<aop:pointcut id="pc" expression="execution(* cn.wsq.ssm.service.impl.*ServiceImpl.(..))"/>
-->
   <aop:pointcut id="pc" expression="within(cn.wsq.ssm.service.impl.*ServiceImpl)"/>
   <!--配置切面 advice-ref:工厂中通知类的id，pointcut-ref:工厂切入点的唯一标识-->
   <aop:advisor advice-ref="myBeforeAdvice" pointcut-ref="pc"/>
   <aop:advisor advice-ref="logAdvice" pointcut-ref="pc"/>
</aop:config>

SS整合

因为spring和springmvc本来就是一加产品，所以可以达到无缝整合

  1. 配置springMVC核心servlet，DispatcherServlet

    在web.xml配置springmvc的核心servlet，并且指定contextConfigLocation，也就是指定配置文件的路径

    <!--配置springMVC核心servlet-->
<servlet>
  <servlet-name>dispatcher</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:config/springmvc.xml</param-value>
  </init-param>
  <load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>dispatcher</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

  2. 配置解决post请求乱码

    在web.xml配置过滤器解决post请求乱码，注意过滤路径是/*

    <!--解决post请求乱码-->
<filter>
  <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

  3. 配置注解扫描控制器

    在config目录下新建springmvc.xml，加入如下配置

    <!--配置注解扫描控制器-->
<context:component-scan base-package="cn.wsq.ssm.controller"/>

  4. 配置处理器映射器和处理器适配器

    <!--配置处理器映射器和处理器适配器-->
<mvc:annotation-driven/>

  5. 放行静态资源文件

    <!-- 将图片，js，css等静态资源排除在外 -->
<mvc:default-servlet-handler/>

  6. 配置视图解析器

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

  7. 前后端分离模式下返回json

    只要加入Jackson相关依赖，并且在响应的方法或返回值上贴上@ResponseBody注解，spring就会使用Jackson自动将返回值解析为json格式返回给前端。

4.项目目录结构

image-20200706221906487

  1. spring.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:aop="http://www.springframework.org/schema/aop"
       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/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--开启注解扫描-->
    <context:component-scan base-package="cn.wsq.ssm"/>
    <!--加载配置文件-->
    <context:property-placeholder location="classpath:db.properties"/>
    <!--创建数据源对象-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driverClass}"/>
        <property name="url" value="${jdbc.jdbcUrl}"/>
        <property name="username" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!--创建sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mapper/*Mapper.xml"/>
        <!--注入configuration，得到mybatis的其他配置项（-->
        <property name="configuration" ref="configuration"/>
    </bean>
    <bean id="configuration" class="org.apache.ibatis.session.Configuration">
        <property name="mapUnderscoreToCamelCase" value="true"/>
    </bean>
    <!--创建mapper-dao-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="cn.wsq.ssm.mapper"/>
    </bean>
    <!--开启注解式事务生效-->
    <tx:annotation-driven transaction-manager="transactionManager"/>
    <!--创建数据源事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--配置aop-->
        <!--注册通知类-->
            <!--前置通知-->
    <bean id="myBeforeAdvice" class="cn.wsq.ssm.advices.MyBeforeAdvice"/>
            <!--环绕通知-->
    <bean id="logAdvice" class="cn.wsq.ssm.advices.LogAdvice"/>
    <!--组装切面-->
    <aop:config>
        <!--配置切入点
            id:切入点在工程中(spring.xml)的唯一标识
            expression: 用来指定切入项目中的哪些组件中的哪些方法 精确到方法级别
            within: 用来指定切入项目中的哪些组件中的哪些方法 精确到类级别 效率要高些
        -->
<!--        <aop:pointcut id="pc" expression="execution(* cn.wsq.ssm.service.impl.*ServiceImpl.*(..))"/>-->
        <aop:pointcut id="pc" expression="within(cn.wsq.ssm.service.impl.*ServiceImpl)"/>
        <!--配置切面 advice-ref:工厂中通知类的id，pointcut-ref:工厂切入点的唯一标识-->
        <aop:advisor advice-ref="myBeforeAdvice" pointcut-ref="pc"/>
        <aop:advisor advice-ref="logAdvice" pointcut-ref="pc"/>
        <!--对于aop:advisor和aop:aspect的区别 https://www.jianshu.com/p/40f79da0cdef -->
<!--        <aop:aspect ref="myBeforeAdvice">-->
<!--            <aop:before method="before" pointcut-ref="pointcut"/>-->
<!--        </aop:aspect>-->
    </aop:config>

    <!--通过factoryBean创建复杂对象-->
    <bean id="calendar" class="cn.wsq.ssm.factorybean.CalendarFactoryBean"/>
</beans>

  2. springmvc.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:mvc="http://www.springframework.org/schema/mvc"
       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/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    <!--配置注解扫描控制器-->
    <context:component-scan base-package="cn.wsq.ssm.controller"/>
    <!--配置处理器映射器和处理器适配器-->
    <mvc:annotation-driven/>
    <!-- 将图片，js，css等静态资源排除在外 -->
    <mvc:default-servlet-handler/>
    <!--配置视图解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

  3. web.xml

    <!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
  <display-name>ssm整合</display-name>
  <!--配置spring工厂监听器-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--配置spring工厂配置文件-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:config/spring.xml</param-value>
  </context-param>
  <!--配置springMVC核心servlet-->
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:config/springmvc.xml</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <!--解决post请求乱码-->
  <filter>
    <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>
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原文地址：https://www.cnblogs.com/seekknowledge/p/13282077.html