用java写网页后台 java如何写网页

package com.xieyuan;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sun.corba.se.impl.javax.rmi.CORBA.Util;
public class MyServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public MyServlet() {
super();
}
/**
* Destruction of the servlet. 
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. 
*
* 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 {
execute(request, response);
}
/**
* The doPost method of the servlet. 
*
* 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 {
execute(request, response);
}
private void execute(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
//设置编码模式
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
//获取请求的URL
String requestUrl=request.getRequestURI();
//获得请求的方式
String method=request.getMethod();
//获得请求的参数
String param=request.getParameter("name");
//设置文档类型
response.setContentType("text/html");
PrintWriter out=response.getWriter();
out.println(""-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("");
out.println("
我的第一个Servlet页面"); 
 
out.println("
"); 
 
out.println("尊敬的"+(param==null? "用户":param)+",您使用了"+method+"方法，访问了"+requestUrl+"页面");
out.println("
"); 
 
out.println("");
out.println("
 
 
"); 
 
out.println("
"); 
 
out.println("");
out.println("
 
 
"); 
 
out.println("
您的IP："+request.getRemoteAddr()+",服务器信息："+this.getServletContext().getServerInfo()+"，上次访问页面为："+request.getHeader("referer")+"");
out.println("");
out.println("");
out.flush();
out.close();
}
/**
* Initialization of the servlet. 
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
}
}