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