spring之整合struts2

西西嘛呦

发布于 2020-08-26 10:21:09

2680

发布于 2020-08-26 10:21:09

文章被收录于专栏：数据分析与挖掘数据分析与挖掘

首先将以下jar包加入到lib文件夹中：

基础目录：

Person.java

package com.gong.spring.struts2.beans;

public class Person {
    
    private String username;
    
    public void setUsername(String username) {
        this.username = username;
    }
    
    public void hello(){
        System.out.println("My name is " + username);
    }
    
}

PersonService.java

package com.gong.spring.struts2.services;

public class PersonService {
    
    public void save(){
        System.out.println("PersonService's save....");
    }
    
}

PersonAction.java

package com.gong.spring.struts2.actions;

import com.gong.spring.struts2.services.PersonService;

public class PersonAction {
    
    private PersonService personService;
    
    public void setPersonService(PersonService personService) {
        this.personService = personService;
    }
    
    public String execute(){
        System.out.println("execute....");
        personService.save();
        return "success";
    }
    
}

基本流程如下：在PersonAction装配PersonService，在execute方法中打印相关信息并调用personService的save方法，最后返回"success"。在PersonService中的save方法输出一句话。

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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="person" 
        class="com.gong.spring.struts2.beans.Person">
        <property name="username" value="spring"></property>    
    </bean>
    
    <bean id="personService"
        class="com.gong.spring.struts2.services.PersonService"></bean>
    
    <!-- 注意: 在 IOC 容器中配置 Struts2 的 Action 时, 需要配置 scope 属性, 其值必须为 prototype -->
    <bean id="personAction" 
        class="com.gong.spring.struts2.actions.PersonAction"
        scope="prototype">
        <property name="personService" ref="personService"></property>    
    </bean>
    
</beans>

在applicationContext中配置相关bean。

stuts.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>

    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />

    <package name="default" namespace="/" extends="struts-default">
        
        <!--  
            Spring 整合 Struts2 时, 在 Struts2 中配置的 Spring 的 Action 的 class 需要指向 IOC 容器中该 bean 的 id
        -->
        <action name="person-save" class="personAction">
            <result>/success.jsp</result>
        </action>
        
    </package>

</struts>

在struts.xml中配置action时，class需要使用applicationContext.xml中bean的id。结果返回给success.jsp。

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

    <!-- 配置 Spring 配置文件的名称和位置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    
    <!-- 启动 IOC 容器的 ServletContextListener -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- 配置 Struts2 的 Filter -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

在web.xml中需要两个部分：一个是让springIOC容器在web应用服务加载时就进行创建。另一个就是配置struts2的过滤器。

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    
    <a href="person-save">Person Save</a>
    
</body>
</html>

sucess.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    
    <h4>Success Page</h4>
    
</body>
</html>

test.jsp

<%@page import="com.gong.spring.struts2.beans.Person"%>
<%@page import="org.springframework.web.context.support.WebApplicationContextUtils"%>
<%@page import="org.springframework.context.ApplicationContext"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    
    <% 
        //1. 从 appication 域对象中得到 IOC 容器的实例
        ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(application);
        
        //2. 从 IOC 容器中得到 bean
        Person person = ctx.getBean(Person.class);
        
        //3. 使用 bean
        person.hello();
    %>
    
</body>
</html>

启动tomacat服务器之后：