以HttpServlet創建Servlet
1、在FirstServlet同目錄下建立HServlet.java
package com.hunhun;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class HServlet extends HttpServlet{
<span style="white-space:pre"> </span>protected void doGet(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException,
IOException{
resp.getWriter().println("doGet"+req.getParameter("username"));
}
protected void doPost(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException,
IOException{
resp.getWriter().println("doPost"+req.getParameter("username"));
}
}
2、web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"
metadata-complete="true">
<servlet>
<servlet-name>FirstServlet</servlet-name>
<servlet-class>com.hunhun.FirstServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>FirstServlet</servlet-name>
<url-pattern>/FirstServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>GServlet</servlet-name>
<servlet-class>com.hunhun.GServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>GServlet</servlet-name>
<url-pattern>/GServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>HServlet</servlet-name>
<servlet-class>com.hunhun.HServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HServlet</servlet-name>
<url-pattern>/HServlet</url-pattern>
</servlet-mapping>
</web-app>
3、編譯文件，reload myweb項目，注意每次重新修改*Servlet.java文件,都需要重新編譯，並重新加載 myweb項目或重啓tomcat7
4、瀏覽器訪問 http://localhost:8080/myweb/HServlet?username=hunhun，可看到
doGethunhun5、在myweb目錄下建立login.html文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登錄</title>
</head>
<body>
<form action="/myweb/HServlet" method="post">
用戶名：<input type="text" name="username">
<input type="submit" value="登錄">
</form>
</body>
</html>
doPosthunhun