JSP——MVC模式+Servlet生命周期

最新推荐文章于 2020-10-11 15:21:43 发布

yw987

最新推荐文章于 2020-10-11 15:21:43 发布

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本文展示了使用Java进行Web开发的一个简单示例，重点介绍了一个基本的登录页面如何通过JSP技术实现。该页面包含了表单元素用于用户输入，并通过LoginServlet处理登录请求。

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         <pre  
         class 
         = 
         "javascript" 
         name= 
         "code" 
          snippet_file_name= 
         "blog_20161020_1_7759643" 
         code_snippet_id= 
         "1940304" 
         ><% 
         @page 
         import 
         = 
         "java.net.URLDecoder" 
         %> 
        
         <%@ page language= 
         "java" 
         import 
         = 
         "java.util.*" 
        
         pageEncoding= 
         "utf-8" 
         %> 
        
         <% 
        
         request.setCharacterEncoding( 
         "utf-8" 
         ); 
        
         String path = request.getContextPath(); 
        
         String basePath = request.getScheme()+ 
         "://" 
         +request.getServerName()+ 
         ":" 
         +request.getServerPort()+path+ 
         "/" 
         ; 
        
         if 
         (request.getParameter( 
         "zyf" 
         )!= 
         null 
         ){ 
        
         String zyf= URLDecoder.decode(request.getParameter( 
         "zyf" 
         ), 
         "utf-8" 
         ); 
        
         out.print(zyf); 
        
         } 
        
         %> 
        
         <!DOCTYPE HTML PUBLIC  
         "-//W3C//DTD HTML 4.01 Transitional//EN" 
         > 
        
         <html> 
        
         <head> 
        
         <base href= 
         "<%=basePath%>" 
         > 
        
         <title>My JSP  
         'login.jsp' 
         starting page</title> 
        
         <meta http-equiv= 
         "pragma" 
         content= 
         "no-cache" 
         > 
        
         <meta http-equiv= 
         "cache-control" 
         content= 
         "no-cache" 
         > 
        
         <meta http-equiv= 
         "expires" 
         content= 
         "0" 
         >     
        
         <meta http-equiv= 
         "keywords" 
         content= 
         "keyword1,keyword2,keyword3" 
         > 
        
         <meta http-equiv= 
         "description" 
         content= 
         "This is my page" 
         > 
        
         <!-- 
        
         <link rel= 
         "stylesheet" 
         type= 
         "text/css" 
          href= 
         "styles.css" 
         > 
        
         --> 
        
         </head> 
        
         <body> 
        
         <form action= 
         "servlet/LoginServlet" 
         method= 
         "post" 
         > 
        
         用户名：<input type= 
         "text" 
         name= 
         "name" 
         ><br> 
        
         密码： <input type= 
         "text" 
         name= 
         "pwd" 
         ><br> 
        
         <input type= 
         "submit" 
         value= 
         "提交登录" 
          ><br> 
        
         </body> 
        
         </html> 
        
         </pre>