两种动态的web资源技术
- Servlet
- JSP(Java Server Page)
JSP运行原理
JSP的脚本元素
图片.png
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<table border = "1" width="60%">
<%
for(int i=1;i<=10;i++){
int num =1;
%>
<tr>
<%for(int j=0;j<10;j++){ %>
<td><%= num %></td>
<%num++; %>
<%} %>
</tr>
<%
}
%>
</table>
</body>
</html>
结果：
上代码结果
EL的快速入门
EL (Expression Language)
语法: ** ${标识符} **
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
request.setAttribute("aa","hello");
%>
<%=
request.getAttribute("aa")
%>
<!-- 与上面表达式达到效果相同，取的aa的值 -->
${aa }
</body>
</html>
