<span style="font-size:18px;"><strong><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%
String path = request.getContextPath();
pageContext.setAttribute("path", path);
%>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<!-- bootstrap 不支持IE的兼容模型，让IE运行最新的渲染模式 -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- 控制移动端浏览器视口的大小和缩放 -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3个meta标签必须放在最前面，任何其他内容都必须跟随其后！ -->
<title>客户后台管理系统</title>
<!-- Bootstrap -->
<link href="${path}/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<!-- 让IE8支持h5标签 -->
<script
src=" ${path}/http://cdn.bootcss.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<!-- 让IE8支持媒体查询 -->
<script
src="${path}/http://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
<style>
</style>
</head>
<body>
<form action="${path}/calculate/result.action">
<table border="1" align="center">
<tr>
<td colspan="2">简单计算器</td>
<td></td>
</tr>
<tr>
<td>计算结果为：</td>
<td>
<table >
<tr>
<td>${firstNum}</td>
<td>${operator}</td>
<td>${secondNum}</td>
<td>=</td>
<td>${result}</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>第一个参数</td>
<td><input type="text" name="firstNum" /></td>
</tr>
<tr>
<td>运算符</td>
<td><select name="operator">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select></td>
</tr>
<tr>
<td>第二个参数</td>
<td><input type="text" name="secondNum" /></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="提交" /></td>
</tr>
</table>
</form>
<!-- jQuery文件。务必在bootstrap.min.js 之前引入 -->
<script src="${path}/bootstrap/js/jquery.min.js"></script>
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="${path}/bootstrap/js/bootstrap.min.js"></script>
</body>
<script>
</script>
</html></strong></span>
<span style="font-size:18px;"><strong>package com.mashen.calculator.dao;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/calculate")
public class CalCulator {
public CalCulator() {
System.out.println("CalCulator 被实例化");
}
// 链接访问/client/pro.action映射到真是路径：/pro/pro
@RequestMapping("/cal.action")
public String cal() {
return "/calcul/index";
}
@RequestMapping("/result.action")
public ModelAndView method(int firstNum,String operator ,int secondNum){
ModelAndView model = new ModelAndView();
int result;
switch (operator) {
case "+":
result = firstNum+secondNum;
break;
case "-":
result = firstNum-secondNum;
break;
case "*":
result = firstNum*secondNum;
break;
case "/":
result = firstNum/secondNum;
break;
default:
result = 0;
break;
}
model.addObject("firstNum",firstNum);
model.addObject("result",result);
model.addObject("secondNum",secondNum);
model.addObject("operator",operator);
model.setViewName("/calcul/index");
return model;
}
}
</strong></span>
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