Struts2實現建議計算器
阿新 • • 發佈：2018-11-03
工程結構
需要匯入的jar包
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <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>
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="first" extends="struts-default"> <action name="jisuan" class="com.Action.DealAction"> <result name="success">/result.jsp</result> <result name="index">/index.jsp</result> </action> </package> </struts>
DealAction
package com.Action; import com.opensymphony.xwork2.ActionSupport; public class DealAction extends ActionSupport { private String num1; //第一個運算元 private String num2; //第二個運算元 private String check; //運算子 private double num3; //計算結果 public String getNum1() { return num1; } public void setNum1(String num1) { this.num1 = num1; } public String getNum2() { return num2; } public void setNum2(String num2) { this.num2 = num2; } public String getCheck() { return check; } public void setCheck(String check) { this.check = check; } public double getNum3() { return num3; } public void setNum3(double num3) { this.num3 = num3; } public String execute() { String x = getNum1(); String y = getNum2(); double num4 = Double.parseDouble(x); double num5 = Double.parseDouble(y); System.out.println(num4); switch (check) { case "+": num3 = num4 + num5; break; case "-": num3 = num4 - num5; break; case "*": num3 = num4 * num5; break; case "/": num3 = num4 / num5; break; } return SUCCESS; } }
index.jsp
<%@ taglib prefix="s" uri="/struts-tags" %>
<%--
Created by IntelliJ IDEA.
User: Elijah
Date: 2018/9/26
Time: 17:50
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>實現簡易計算器</title>
</head>
<body>
<s:form action="jisuan">
<s:label value="簡易計算器"></s:label>
<s:textfield name="num1" label="First Number"></s:textfield>
<s:select name="check" list="{'+','-','*','/'}" label="請選擇運算子"></s:select>
<s:textfield name="num2" label="Second Number"></s:textfield>
<s:submit value="計算"></s:submit>
</s:form>
</body>
</html>
result.jsp
<%@ taglib prefix="s" uri="/struts-tags" %>
<%--
Created by IntelliJ IDEA.
User: Elijah
Date: 2018/9/26
Time: 18:04
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<html>
<head>
<title>運算結果</title>
</head>
<body>
<br>您計算的結果是：
<s:property value="num1"/> <s:property value="check"/> <s:property value="num2"/> = <s:property value="num3"/><br>
</body>
</html>