servlet（doPost方法）

来源：互联网发布：金融大数据编辑：程序博客网时间：2024/06/05 10:10

package com.javaweb;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 ServletDemo extends HttpServlet {/** *  */private static final long serialVersionUID = 1L;/** * Constructor of the object. */public ServletDemo() {super();}/** * Destruction of the servlet. <br> */public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}/** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. *  * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//设置输出内容格式response.setContentType("text/html;charset=gb2312");PrintWriter out = response.getWriter();//设置接收参数编码格式request.setCharacterEncoding("gb2312");String username=request.getParameter("username");String password=request.getParameter("password");out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");out.println("<HTML>");out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");out.println("  <BODY>");out.println("username"+username+"<br>");out.println("password"+password+"<br>");out.println("  </BODY>");out.println("</HTML>");out.flush();out.close();}/** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. *  * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html");PrintWriter out = response.getWriter();out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");out.println("<HTML>");out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");out.println("  <BODY>");out.print("    This is ");out.print(this.getClass());out.println(", using the POST method");out.println("  </BODY>");out.println("</HTML>");out.flush();out.close();}/** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */public void init() throws ServletException {// Put your code here}}

<%@ page language="java" import="java.util.*" contentType="text/html;charset=gb2312"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    </head>    <body>    <!-- action就是路径，需要写 -->   <form action="servlet/ServletDemo" method="post">   账号：<input type="text" name="username"/><br>   密码：<input type="password" name="password"/><br>   <input type="submit" value="递交"/>   <input type="reset"  value="重置"/>   </form>  </body></html>