簡易Servlet計算器，servlet計算器
編寫一個簡易的Servlet計算器,暫時僅能實現 + - * / % 五種運算
jsp界面：
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1 <%@ page language="java" contentType="text/html; charset=UTF-8"
2 pageEncoding="UTF-8"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
7 <title>Servlet計算器</title>
8 </head>
9 <body>
10 <form action="TestJSQ" method="post">
11 <input type="text" name="shu1">
12 <input type="text" name="yunsuan" >
13 <input type="text" name="shu2">
14 <input type="submit" value="=">
15
16 </form>
17 </body>
18 </html>
View Code
Servlet程序：
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1 package com.sp.web;
2
3 import java.io.IOException;
4 import javax.servlet.ServletException;
5 import javax.servlet.http.HttpServlet;
6 import javax.servlet.http.HttpServletRequest;
7 import javax.servlet.http.HttpServletResponse;
8
9 public class Test_JSQ extends HttpServlet {
10 private static final long serialVersionUID = 1L;
11
12 public Test_JSQ() {
13 super();
14
15 }
16
17 protected void doGet(HttpServletRequest request, HttpServletResponse response)
18 throws ServletException, IOException {
19
20 response.setCharacterEncoding("UTF-8");
21 response.setContentType("text/html");
22 Double num1 = Double.parseDouble(request.getParameter("shu1"));
23 Double num2 = Double.parseDouble(request.getParameter("shu2"));
24 String ysf = request.getParameter("yunsuan");
25
26 Double jg = 0.0;
27 if (ysf.equals("+")) {
28 jg = num1 + num2;
29 response.getWriter().write(num1 + " + " + num2 + " = " + jg);
30 } else if (ysf.equals("-")) {
31 jg = num1 - num2;
32 response.getWriter().write(num1 + " － " + num2 + " = " + jg);
33 } else if (ysf.equals("*")) {
34 jg = num1 * num2;
35 response.getWriter().write(num1 + " × " + num2 + " = " + jg);
36 } else if (ysf.equals("/")) {
37 if (num2 != 0) {
38 jg = num1 / num2;
39 response.getWriter().write(num1 + " ÷ " + num2 + " = " + jg);
40 } else {
41 response.getWriter().write("除數不能為零");
42 }
43 } else if (ysf.equals("%")) {
44 jg = num1 % num2;
45 response.getWriter().write(num1 + " % " + num2 + " = " + jg);
46 }
47
48
49 }
50
51 protected void doPost(HttpServletRequest request, HttpServletResponse response)
52 throws ServletException, IOException {
53
54 doGet(request, response);
55 }
56
57 }
View Code
運行：
