DMI ( Dynamic Method Invocation )

时间：2021-01-18 22:54:29

功能：

DMI ( Dynamic Method Invocation )

点击 hello , 调用 execute 函数

点击 update , 调用 update 函数

1.项目结构

DMI ( Dynamic Method Invocation )

2.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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

  <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>

3.UserAction.java

package com.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {

    private static final long serialVersionUID=1L;

    private String info;

    public String getInfo()

    {

        return info;

    }

    public void setINfo(String info)

    {

        this.info=info;

    }

    public String execute() throws Exception{

        info="hello world bb!";

        return "hello";

    }

    public String update() throws Exception{

        info="ok,updated!";

        return "update";

    }

}

4.index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!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>

    <center>

        <a href="user_execute">hello</a><br>

        <a href="user_update">update</a>

    </center>

</body>

</html>

5.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>

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

        <action name="user_*" class="com.action.UserAction" method="{1}">

            <result name="hello">/hello.jsp</result>

            <result name="update">/update.jsp</result>

        </action>

    </package>

</struts>

6.hello.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!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>

    <center>

        <s:property value="info" />

    </center>

</body>

</html>

7.update.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!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>

    <center>

        <s:property value="info" />

    </center>

</body>

</html>

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