五、整合struts2和mybatis和spring

<!-- 编码后面UserDaoImpl extends SqlSessionDaoSupport implements UserDao执行不了，目录结构也有所改变，对项目看-->

<!--执行不了的原因mybatis核心包没导入，导入mybatis较高版本可以执行了-->

<!--做测试list.jsp少了核心标签库的jar包，新导入了taglibs-standard-impl-1.2.5.jartaglibs-standard-spec-1.2.5.jar，对下一个注解整合影响改进一样-->

1、导入jar包,及mysql驱动包5.1.20(后来删除了commons-logging.jar)

 2、web.xml配置文件（重要）

　　对应用上下文配置文件改名为默认名：applicationContext

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
    <!-- 配置spring -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
      <listener>
          <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
      <!-- struts2的配置 -->
      <filter>
          <filter-name>struts2</filter-name>
          <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.class</filter-class>
      </filter>
      <filter-mapping>
          <filter-name>struts2</filter-name>
          <url-pattern>*.action</url-pattern>
      </filter-mapping>
</web-app>

3、mybatis配置文件mybatis.cfg.xml

<?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>
    <typeAliases>
        <package name="cn.sxt.vo"/>
    </typeAliases>
    
    <mappers>
        <package name="cn.sxt.dao.UserMapper"/>
    </mappers>
</configuration>

4、编码  整个目录结构

UserDao接口

 UserDao实现

 UserService接口

public interface UserService {
    public List<User> getAll();
}

UserService实现

public class UserServiceImpl implements UserService {
    private UserDao userDao;
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }
    public List<User> getAll() {
        return userDao.getAll();
    }
}

UserAction

public class UserAction {
    private List<User> list;
    private UserService userService;
    public String list(){
        list = userService.getAll();
        return "success";
    }
    public List<User> getList() {
        return list;
    }
    public void setList(List<User> list) {
        this.list = list;
    }
    public UserService getUserService() {
        return userService;
    }
    public void setUserService(UserService userService) {
        this.userService = userService;
    }
}

Spring配置文件

applicationContext.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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 配置数据源  dataSource可以使用第三方的数据源的插件，也可以使用spring给我们提供的数据源的插件 -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/test"/>
        <property name="username" value="root"/>
        <property name="password" value="123"/>
    </bean>  
    <!-- spring声明式事务配置，首先导入命名空间tx -->
    <!-- 配置事务管理器 它引入了一个dataSource，它来管理dataSource-->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 配置事务通知 -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <!-- 配置哪些方法使用什么样的事务，配置事务的传播特性 -->
        <tx:attributes><!--required会去检查当前有没有事务开启，如果有用当前事务，没有重新开启一个事务  -->
            <tx:method name="add" propagation="REQUIRED"/>
            <tx:method name="insert" propagation="REQUIRED"/>
            <tx:method name="update" propagation="REQUIRED"/>
            <tx:method name="delete" propagation="REQUIRED"/>
            <tx:method name="remove" propagation="REQUIRED"/>
            <tx:method name="get" read-only="true"/>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <aop:config><!-- 正常情况下，这里配置service execution(* cn.sxt.service.impl.*.*(..)) -->
        <aop:pointcut expression="execution(* cn.sxt.dao.impl.*.*(..))" id="pointcut"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
    </aop:config>
    <!-- 配置好了，现在再去做测试的时候，虽然有插入和删除两条sql，但由于delete的sql有错误，所以插入的也
          插入不进去了，就起作用了（一个有错全部回滚） -->
    
    <!-- 配置sqlSessionFactory,完全可以取代mybatis.cfg.xml文件，但是这里引用它，它里面还可以找到映射 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:cn/sxt/vo/*.mapper.xml"/>
    </bean> 
<!--$$$$$$$$$$$$$$$$$上面内容是取代mybatis.cfg.xml文件的，没完全取代，保留了里面的取别名和找实体类的映射功能 -->
   <import resource="config/spring/user.xml"/>

User.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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd">
        
   <bean id="userDao" class="cn.sxt.dao.impl.UserDaoImpl">
           <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
   </bean>
   <bean id="userService" class="cn.sxt.service.impl.UserService">
           <property name="userDao" ref="userDao"></property>
   </bean>
   <bean id="userAction" class="cn.sxt.action.UserAction">
           <property name="userService" ref="userService"></property>
   </bean>
</beans>

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
<include file="config/struts/user.xml"></include>
</struts>