1. 结构

            ServletDemo02----JavaResources---src---LoginServlet.java

                                         ----WebContent---WEB-INF---web.xml

                                         ----WebContent---index.html

2.LoginServlet.java

import java.io.*;  import javax.servlet.*;  import javax.servlet.http.*;    public class LoginServlet extends HttpServlet {      //重写doGet方法      public void doGet(HttpServletRequest request,  HttpServletResponse response)  throws ServletException,  IOException {          String username = request.getParameter("username");             String password = request.getParameter("password");                          //服务器端打印信息          //System.out.println("username=" + username);          //System.out.println("password=" + password);          //设置编码格式          response.setContentType("text/html;charset=GB18030");                    //返回html页面          response.getWriter().println("");          response.getWriter().println("");             response.getWriter().println("");              response.getWriter().println("");            response.getWriter().println("");             response.getWriter().println("欢迎【" + username + "】用户登录成功！！！");            response.getWriter().println("");            response.getWriter().println("");          }                         //重写doPost方法      public void doPost(HttpServletRequest request,  HttpServletResponse response)  throws ServletException,  IOException {          doGet(request, response);                         }       }

3.web.xml

    
    
       
     
      ServletDemo02
       
     
                
      
       MyServlet
                
      
       LoginServlet
            
             
     
                
      
       MyServlet
                    
      
       /LoginServlet
            
          
     
          
      
       index.html
          
      
       index.htm
          
      
       index.jsp
          
      
       default.html
          
      
       default.htm
          
      
       default.jsp
        
     
    

4.index.jsp

    
             
     
                    用户：
      
      
              密码：