struts配置通配符*来匹配方法，实现动态调用

时间：2024-01-17 16:31:08

01:web.xml中配置，启动struts2

<?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">

    <!-- 01:启动struts2框架 -->

    <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>

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

</web-app>

02：编写action类

package com.self.action;

/**

 * 02：写相应的处理方法

 */

public class HelloWorldAction {

    private String message;

    public String helloworld_1(){

        this.message="helloworld_1";

        return "helloworld_1";

    }

    public String helloworld_2(){

        this.message="helloworld_2";

        return "helloworld_2";

    }

    //为属性注入值，需要提供set方法

    public void setMessage(String message) {

        this.message = message;

    }

    //在页面显示值，需要get方法

    public String getMessage() {

        return message;

    }

}

03：配置struts.xml

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

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

	<!-- 01：将.action访问，改为.do和.action -->

	<constant name="struts.action.extension" value="do,action" />

	<!-- 02：指定默认编码，相当于HttpServletRequest的setCharacterEncoding方法，也作用于freemarker、velocity的输出 -->

	<constant name="struts.i18n.encoding" value="UTF-8" />

	<include file="department.xml"/>

</struts>

　　

04:编写引入的department.xml

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

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

	<package name="dep" namespace="/department" extends="struts-default">

		<!-- 用通配符*来指代方法名，{1}代表第一个通配符所代表的字段：这里代表方法 -->

		<action name="helloworld_*" class="com.self.action.HelloWorldAction" method="{1}" >

			<result name="helloworld_1">

				/helloworld_1.jsp

			</result>

			<result name="helloworld_2">

				/helloworld_2.jsp

			</result>

		</action>

	</package>

</struts>

　　

05:编写界面1

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

<head>

<title>显示</title>

</head>

<!-- 第4步：显示 -->

<body>

	<BR>

	<BR>

	<center>

		将页面放在WEB-INF下面，这样用户直接访问不到<BR> <BR> 为action的属性注入值: ${message}

		<BR>

	</center>

</body>

</html>

　　

06：编写界面2

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

<head>

<title>显示</title>

</head>

<!-- 第4步：显示 -->

<body>

	<BR>

	<BR>

	<center>

		将页面放在WEB-INF下面，这样用户直接访问不到<BR> <BR> 为action的属性注入值: ${message}

		<BR>

	</center>

</body>

</html>

　　

07：访问路径1、2

http://localhost:8080/Struts2_01/department/helloworld_helloworld_1.action

http://localhost:8080/Struts2_01/department/helloworld_helloworld_2.action

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