java Servlet 样例

HelloWorld.java

package com.servlets;

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;

public class HelloWorld extends HttpServlet {
//GET方法
    public void doGet(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {
        res.setContentType("text/html");
        PrintWriter out = res.getWriter();
        out.println("<HTML>");
        out.println("<HEAD><TITLE>Hello World</TITLE></HEAD>");
        out.println("<BODY>");
        out.println("<BIG>Hello World</BIG>");
        out.println("</BODY></HTML>");
    }
//POST方法
    public void doPost(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {
        
        res.setContentType("text/html");
        PrintWriter out = res.getWriter();
        out.println("<HTML>");
        out.println("<HEAD><TITLE>Hello World</TITLE></HEAD>");
        out.println("<BODY>");
        out.println("name:"+req.getParameter("name"));
        out.println("<BIG>Hello World</BIG>");
        out.println("</BODY></HTML>");
        
        //doGet(req, res);
    }
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>lx</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>HelloWorld</display-name>
    <servlet-name>HelloWorld</servlet-name>
    <servlet-class>com.servlets.HelloWorld</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>HelloWorld</servlet-name>
    <url-pattern>/HelloWorld.do</url-pattern>
  </servlet-mapping>
</web-app>

input.html

<!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>输入页面</title>
</head>
<body>
<form action="/lx/HelloWorld.do" method="post">
请输入你的名字<input name="name" type="text" /><input type="submit"/>
</form>
</body>
</html>

相关阅读:
HDU 5791 Two (DP)
POJ 1088 滑雪（DPor记忆化搜索）
LightOJ 1011
POJ 1787 Charlie's Change (多重背包带结果组成)
HDU 5550 Game Rooms （ccpc2015 K）（dp）
HDU 5542 The Battle of Chibi （ccpc 南阳 C）(DP 树状数组离散化)
HDU 5543 Pick The Sticks （01背包）
HDU 5546 Ancient Go （ccpc2015南阳G）
NB-IoT的DRX、eDRX、PSM三个模式（转载，描述的简单易懂）
MQTT 嵌入式端通讯协议解析（转）
原文地址：https://www.cnblogs.com/xuefuwu/p/2486647.html