import
An import attribute describes the types that are available to the 
scripting environment. The value is as in an import declaration in the 
Java programming language, i.e. a (comma separated) list of either a 
fully qualified Java programming language type name denoting that 
type, or of a package name followed by the  .*  string, denoting all 
the public types declared one in that package. The import list shall be 
imported by the translated JSP page implementation and are thus 
available to the scripting environment.
The default import list is 
java.lang.*
, 
javax.servlet.*
, 
javax.servlet.jsp.*
 and 
javax.servlet.http.*
.
This value is currently only defined when the value of the 
language
directive is  
java
 .
session
Indicates that the page requires participation in an (http) session.
If  
true
  then the implicit script language variable named 
session
  of type 
javax.servlet.http.HttpSession
references the current/new session for the page. 
If  
false
  then the page does not participate in a session; the 
session
  implicit variable is unavailable, and any reference to it 
within the body of the JSP page is illegal and shall result in a fatal 
translation error.
Default is  
true
 .
buffer
Specifies the buffering model for the initial  
out
  
JspWriter
 to 
handle content output from the page.
If  
none
 , then there is no buffering and all output is written directly 
through to the 
ServletResponse PrintWriter
. 
If a buffer size is specified (e.g 
12kb
) then output is buffered with a 
buffer size not less than that specified.
Depending upon the value of the  
autoFlush
  attribute, the contents 
of this buffer is either automatically flushed, or an exception is raised, 
when overflow would occur.
The default is buffered with an implementation buffer size of not less 
than 
8kb
.
autoFlush
Specifies whether the buffered output should be flushed automatically 
( 
true
  value) when the buffer is filled, or whether an exception 
should be raised ( 
false
  value) to indicate buffer overflow.
The default is  
true
 .
Note: it is illegal to set 
autoFlush
 to  
false
  when 
buffer=none
 .
45
JavaServer Pages 1.1 Specification  
November 30, 1999




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