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package model;
public class Add {
double x;
double y;
double sum;
public double getX() {
return x;
}
public void setX(double x) {
this.x = x;
}
public double getY() {
return y;
}
public void setY(double y) {
this.y = y;
}
public double getSum() {
return x+y;
}
}
package action;
import model.Add;
public class AddAction {
private Add add;
public Add getAdd() {
return add;
}
public void setAdd(Add add) {
this.add = add;
}
public AddAction() {
}
public String executeAdd() {
String ff=null;
if(add.getSum()<0) {
ff="-";
}else {
ff="+";
}
return ff;
}
}
<?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">
<action name="opadd" class="action.AddAction" method="executeAdd">
<result name="+">positive.jsp</result>
<result name="-">negative.jsp</result>
</action>
</package>
</struts>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0">
<display-name>struts 2</display-name>
<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>
<%@ 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="opadd" method="post">
加數：<input type="text" name="add.x">
被加數：<input type="text" name="add.y">
<input type="submit" value="求和">
</form>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import= "model.Add" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%Add add=null; %>
fushu:${add.x}+${add.y}=$add.sum}
</body>
</html>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import= "model.Add" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%Add add=null; %>
zhengshu :${add.x}+${add.y}=$add.sum}
</body>
</html>
