Struts2对象属性驱动的Action

求任意两数的代数和

input.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="add" method="post">
			请输入两数：<br><br>
			加数：<input name="s.x"><br><br>
			被加数：<input name="s.y"><br><br>
			<input type="submit" value="求和">
	</form>
</body>
</html>

positive.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	代数和为正数：<s:property value="sum"></s:property>
</body>
</html>

negative.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	代数和为负数：<s:property  value="sum"></s:property>
</body>
</html>

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">
  	<filter>
    	<filter-name>struts2</filter-name>
    	<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
   	 	<filter-name>struts2</filter-name>
   		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

Action.java

package Action;

import com.opensymphony.xwork2.ActionSupport;

import javabean.Add;

public class Action extends ActionSupport {
	private int sum;
	private Add s;
	
	public Add getS() {
		return s;
	}

	public void setS(Add s) {
		this.s = s;
	}
	public int getSum() {
		return s.sum();
	}
	public String execute() throws Exception {
		sum=s.sum();
		if(sum>=0)
			return "+";
		else
			return "-";
	}
}

Add.java

package javabean;

public class Add {
	private int x;
	private int y;
	public int getX() {
		return x;
	}
	public void setX(int x) {
		this.x = x;
	}
	public int getY() {
		return y;
	}
	public void setY(int y) {
		this.y = y;
	}
	public int sum() {
		return x+y;
	}
}

struts.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>
	<package name="default" namespace="/" extends="struts-default">
		<action name="add" class="Action.Action" >
			<result name="+">/positive.jsp</result>
			<result name="-">/negative.jsp</result>
		</action>
	</package>
</struts>

Struts2对象属性驱动的Action

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