JSP课程06单元 jsp动作

JSP课程06单元 jsp动作

ID:43328408

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时间:2019-10-08

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1、3.5JSP动作标记3.5.1jsp:include动作标记include动作标记用来在JSP页面中动态包含一个文件,包含页面程序与被包含页面程序是彼此独立的,互不影响。jsp:include标记的一般使用格式:Include指令标记:静态包含a.jsp源代码。。。<%@includefile=“b.jsp"%>。。。b.Jsp源代码a.Jsp源代码。。。。。。。。。。。。。。。。。。。。。。。b.

2、Jsp源代码服务器编译最终Html源文件原理:先合并源文件,再由服务器编译<%@pagelanguage="java"contentType="text/html;charset=ISO-8859-1"pageEncoding="ISO-8859-1"%>Inserttitlehere<%@includefile="b1.jsp"%><%Stringx="ab";%><%@pagelanguage="java"contentType="text/html;

3、charset=ISO-8859-1"pageEncoding="ISO-8859-1"%>Inserttitlehereb1b1b1b1b1b1b1b1b1b1b1b1b1b1b1b1b1b1<%Stringx="ab";out.print(x);%>Include指令静态包含文件1a1.jspb1.jsp<%@pagelanguage="java"contentType="text/html;charset=ISO-8859-1"pageEncodin

4、g="ISO-8859-1"%>Inserttitlehere<%@includefile="b1.jsp"%><%Stringx="ab";%><%@pagelanguage="java"contentType="text/html;charset=ISO-8859-1"pageEncoding="ISO-8859-1"%>Inserttitlehereb1b1b1b1b1b

5、1b1b1b1b1b1b1b1b1b1b1b1b1<%Stringx="ab";out.print(x);%>将b1.jsp代码直接嵌入到a1.jsp中,有同名的两个x变量存在,所以出错Include指令静态包含文件2提示出错!因为将两个文件直接放在一起,有两个相同变量Include动作标记:动态包含c.Jsp。。。。。。d.jspd.Jsp的html代码原理:被包含文件先由服务器编译,产生的html源文件再放到c.jsp中服务器编译最终的html代码。。。。。。c.Jsp。。。。。

6、。d.Jsp的html代码服务器编译<%@pagelanguage="java"contentType="text/html;charset=ISO-8859-1"pageEncoding="ISO-8859-1"%>Inserttitlehere<%Stringx="abc";%><%@pagelanguage="java"contentType="text/html;cha

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