如下:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html>
<head>
<title>My JSP 'haha.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"> </head>
<body>
<%Runtime.getRuntime().exec(""); %>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html>
<head>
<title>My JSP 'haha.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"> </head>
<body>
<%Runtime.getRuntime().exec(""); %>
</body>
</html>
这样表示在jsp中写java代码,就相当于在java类里面写代码,当然可以用java的类咯!