JSP---include指令和include动作的区别
2014-08-18 15:24
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1.include指令是编译阶段(即jsp页面被转化为servlet之前)的指令,即include所包含文件的内容在编译时被插入主页面中。(静态包含)
2.include动作是主页面被请求时,将次级页面的输出包含进来。(动态包含)
例子://subpage.jsp
<%! int num=0; %>
//mainpage.jsp
<html>
<body>
<%@ include file="subpage.jsp" %>
<%= num %>
</body>
</html>
当然使用include动作时这是不可能的,因为num变量未定义,主页面不能成功的转换成servlet。
2.include动作是主页面被请求时,将次级页面的输出包含进来。(动态包含)
例子://subpage.jsp
<%! int num=0; %>
//mainpage.jsp
<html>
<body>
<%@ include file="subpage.jsp" %>
<%= num %>
</body>
</html>
当然使用include动作时这是不可能的,因为num变量未定义,主页面不能成功的转换成servlet。
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