Web应用开发: JSP语法编程实践(一) JSP中的标识

时间 2021-01-20

实验目标：

掌握JSP中指令标识、脚本标识、动作标识和注释的使用。

实验内容：

（1）编写两个JSP页面，在页面1中有一个表单，用户通过该表单输入用户的姓名并提交给页面2；
在页面2中输出用户的姓名和人数。如果页面1没有提交姓名或者姓名含有的字符个数大于10，就跳转到页面1
（2）编写4个JSP页面。页面1、页面2和页面3都含有一个导航条，以便用户方便地单击超链接访问这3个页面；页面4为错误处理页面。要求这3个页面通过使用include动作标记动态加载导航条文件head.txt

实验代码:

·实验一：

//jsp1.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

<form method=get action=jsp2.jsp> 
      你的名字是：
     <input type=text name=username> 
     <input type=submit value=submit> 
     
</form> 

</body>
</html>

//jsp2.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

<%! int count=0; %>

    <%  
    
       request.setCharacterEncoding("utf-8");
       String name=request.getParameter("username");  
       session.setAttribute("username",name);
       
       if(name!=""&&name.length()<=10){
		 
    	out.println("你好，");				
    	out.println(name);
      	out.println("你是第");
      	out.println(++count);
        out.println("个用户");	
      }else{

          /* 使用JavaScript跳转（会有提示框）
          <!-- <script type="text/javascript">  
          window.location="jsp1.jsp";  
          alert(window.location.href);  
          </script> -->   */
          
          /* 使用response对象跳转 */
    	  response.sendRedirect("jsp1.jsp");  
           
       }%>
      
      
</body>
</html>

关于jsp页面跳转的博客（非本人）

####·实验二：

//head.txt
<table  cellSpacing="1" cellPadding="1" width="60%" align="center" border="0" >
<tr valign="bottom">
<td><A href="jsp01.jsp"><font size=3>jsp01.jsp页面</font></A></td>
<td><A href="jsp02.jsp"><font size=3>jsp02.jsp页面</font></A></td>
<td><A href="jsp03.jsp"><font size=3>jsp03.jsp页面</font></A></td>
</tr>
</Font> 
</table>

//jsp01.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<jsp:include page="head.txt"/>
</head>
<body>
<br/>
<font size=5 color=red>
This is jsp01.jsp
</font>
</body>
</html>

//jsp02.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jsp02</title>
<jsp:include page="head.txt"/>
</head>
<body>
<br/>
<font size=5 color=red>
This is jsp02.jsp
</font>
</body>
</html>

//jsp03.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jsp03</title>
<jsp:include page="head.txt"/>
</head>
<body>
<br/>
<font size=5 color=red>
This is jsp03.jsp
</font>
</body>
</html>

//jsp04.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jsp04</title>
<jsp:include page="head.txt"/>
</head>
<body>
<br/>
<font size=5 color=red>
This is the error page
</font>
</body>
</html>