Spring与Struts2 的整合使用

Spring与Struts2 的整合使用

项目结构

　　

再Struts2 中(还没有与Spring整合时)，它创建Action类的依据

<action name="second" class="com.SecondController">
 　　<result name="success">/index.jsp</result>
 </action>

同时还有一个点需要注意的就是，struts会每次请求时自动实例化一个新的Action类的对象

　　导进相关的依赖包：pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <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</groupId>
     <artifactId>spring-web-struts2</artifactId>
     <version>1.0-SNAPSHOT</version>
     <!--打成war包-->
     <packaging>war</packaging>

     <dependencies>
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
             <version>3.1.0</version>
             <scope>provided</scope>
         </dependency>

         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
             <version>5.0.2.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-web</artifactId>
             <version>5.0.2.RELEASE</version>
         </dependency>

         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-core</artifactId>
             <version>2.5.12</version>
         </dependency>

         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-spring-plugin</artifactId>
             <version>2.5.12</version>
         </dependency>
     </dependencies>

     <build>
         <plugins>
             <plugin>
                 <artifactId>maven-war-plugin</artifactId>
                 <version>2.2</version>
                 <configuration>
                     <warSourceDirectory>web</warSourceDirectory>
                 </configuration>
             </plugin>
         </plugins>
     </build>
 </project>

struts2 与spring整合的步骤

　　1：配置监听器ContextLoaderListener，以便创建出Spring的容器对象web.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_3_1.xsd"
          version="3.1">
     <!--配置监听器ContextLoaderListener，以便创建出Spring的容器对象-->
     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>
     <!--访问的配置路径-->
     <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>classpath:applicationCtx.xml</param-value>
     </context-param>

     <!--struts2过滤器-->
     <filter>
         <filter-name>sss</filter-name>
         <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
     </filter>
     <filter-mapping>
         <filter-name>sss</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
 </web-app>

　　2：添加struts-spring的依赖，以便改变默认的Struts的实例化Action类规则（上面已配置）

1. 因为读取到的值就是bean的名字

2. 利用WebApplicationContextUtils的方法就可以实例化action类

3. 实例化action类的时候，就可以注入依赖的Service类型

     <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-spring-plugin</artifactId>
             <version>2.5.12</version>
         </dependency>

　　创建UserDao接口

 package dao;

 public interface UserDao {
     void insert();
 }

　　实现UserDao：UserDaoImpl

 package dao;

 public class UserDaoImpl implements UserDao {
     public void insert() {
         System.out.println("dao insert----");
     }
 }

　　创建UserService接口

 package service;

 public interface UserService {
     void insert();
 }

　　UserServiceImpl

 package service;

 import dao.UserDao;

 public class UserServiceImpl implements UserService {
     private UserDao userDao ;

     public UserDao getUserDao() {
         return userDao;
     }

     public void setUserDao(UserDao userDao) {
         this.userDao = userDao;
     }

     public void insert() {
         userDao.insert();
     }
 }

　　把UserDaoImpl和UserServiceImpl让Spring管理：applicationCtx.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"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

     <bean id="userDao" class="dao.UserDaoImpl"></bean>
     <bean id="userService" class="service.UserServiceImpl">
         <property name="userDao" ref="userDao"></property>
     </bean>

     <!--记得设定Action（也就是Controller）的设置，要设置为非单利，一般就设置为prototype-->
     <bean id="sencondController" class="com.SecondController"  scope="prototype">
         <property name="userService" ref="userService"></property>
     </bean>
 </beans>

　　配置struts并且让Spring管理

 <?xml version="1.0" encoding="UTF-8"?>

 <!DOCTYPE struts PUBLIC
         "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
         "http://struts.apache.org/dtds/struts-2.5.dtd">

 <struts>

     <package name="demo" extends="struts-default">
         <action name="second" class="sencondController">
             <result name="success">/index.jsp</result>
         </action>
     </package>
 </struts>

　　SecondController

 package com;

 import service.UserService;

 public class SecondController {

     public SecondController() {
         System.out.println("second contructor-----");
     }

     private UserService userService;

     public UserService getUserService() {
         return userService;
     }

     public void setUserService(UserService userService) {
         this.userService = userService;
     }

     public  String execute(){
         System.out.println("execute----");
         userService.insert();
         return "success";
     }

 }

个人笔记，请勿喷