Servlet实现计算器
package com.hanqi.web;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class HWjisuan
*/
public class HWjisuan extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public HWjisuan() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//response.getWriter().append("Served at: ").append(request.getContextPath());
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
PrintWriter pw=response.getWriter();
String f=request.getParameter("f");
String a=request.getParameter("a");
String b=request.getParameter("b");
double aa=Double.parseDouble(a);
double bb=Double.parseDouble(b);
if(a!=""&&b!="")
{
if(f.equals("/")&&bb!=0)
{
pw.println(aa/bb);
}
else
{
pw.println("除数不能为0");
}
}else
{
pw.println("不能为空");
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>计算器</title>
</head>
<body>
<form action="jisuan" method="post">
<table>
<tr>
<td><input type="text" name="a" style="font-size: 15px; width: 50px;"/></td>
<td><input type="text" name="f" style="font-size: 15px; width: 15px;"/></td>
<td><input type="text" name="b" style="font-size: 15px; width: 50px;"/></td>
<td><input type="submit" value="等于"/></td>
</tr>
</table>
</form>
</body>
</html>
运行结果：
时间： 2024-10-13 16:15:57