JSP Syntax (6)--page instruction

js| Syntax Page instruction

Defines global properties in a JSP file.


JSP syntax
<%@ page
[language= "Java"]
[extends= "Package.class"]
[import= "{package.class | package.*}, ..."]
[Session= ' true | false ']
[buffer= "none | 8kb | sizekb"]
[Autoflush= ' true | false ']
[Isthreadsafe= ' true | false ']
[info= "Text"]
[errorpage= "Relativeurl"]
[contenttype= "MimeType] [; Charset=characterset] "| "Text/html; Charset=iso-8859-1 "]
[Iserrorpage= ' true | false ']
%>
Example
<%@ page import= "java.util.*, java.lang.*"%>
<%@ page buffer= "5kb" autoflush= "false"%>
<%@ page errorpage= "error.jsp"%>
Describe
The <%@ page%> instruction acts on the entire JSP page, including the static include file. However, the <% @ Page%> directive does not work on dynamic include files, such as <jsp:include>

You can use multiple <% @ Page%> instructions on one page, but the attributes can only be used once, but there is one exception, which is the import attribute. Because the Import property is similar to the import statement in Java (referencing the Java Language), you can use this attribute more than once.

Regardless of where you put the <% @ Page%> instruction in the JSP file, it is scoped to the entire JSP page. However, for the readability of JSP programs, as well as good programming habits, it is best to put it in the top of the JSP file.