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 mytest extends HttpServlet {

 /**
  * Constructor of the object.
  */
 private static final long serialVersionUID = 1L;
 //static final long serialVersionUID = -3387516993124229948L;
 public mytest() {
  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 {

  response.setContentType("text/html;charset=gb2312");
  PrintWriter out = response.getWriter();
  out
    .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
  out.println("<HTML>");
  out.println("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=gb2312\" />");
  out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
  out.println("  <BODY>");
  out.print("    This is ");
  out.println(", using the GET method");
  //request.setCharacterEncoding("UTF-8");
    String title = request.getParameter("key");
    if(title==null)
    {
     title = "没有值";   
    }
  out.print(this.getClass()+title);
  out.print("<br>中文测试");
  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;charset=gb2312");
  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 ");
  String title = request.getParameter("key");
    if(title==null)
    {
     title = "没有值";   
    }
  title =new String(title.getBytes("ISO8859-1"),"GB2312");    
  out.print(this.getClass()+title);
  out.print("<br>中文测试");
  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 occure
  */
 public void init() throws ServletException {
  // Put your code here
 }

}

HttpServlet一个典型的例子-没有乱码import java.io.IOException;
HttpServlet一个典型的例子-没有乱码
import java.io.PrintWriter;
HttpServlet一个典型的例子-没有乱码
import java.io.*;
HttpServlet一个典型的例子-没有乱码
HttpServlet一个典型的例子-没有乱码
HttpServlet一个典型的例子-没有乱码
import javax.servlet.ServletException;
HttpServlet一个典型的例子-没有乱码
import javax.servlet.http.HttpServlet;
HttpServlet一个典型的例子-没有乱码
import javax.servlet.http.HttpServletRequest;
HttpServlet一个典型的例子-没有乱码
import javax.servlet.http.HttpServletResponse;
HttpServlet一个典型的例子-没有乱码
HttpServlet一个典型的例子-没有乱码

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