looptagsupport.html

此文件是关于流的应用

<A NAME="prepare()"><!-- --></A><H3>
prepare</H3>
<PRE>
protected abstract void <B>prepare</B>()
                         throws javax.servlet.jsp.JspTagException</PRE>
<DL>
<DD><p>Prepares for a single tag invocation.  Specifically, allows
 subclasses to prepare for calls to hasNext() and next(). 
 Subclasses can assume that prepare() will be called once for
 each invocation of doStartTag() in the superclass.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.servlet.jsp.JspTagException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="release()"><!-- --></A><H3>
release</H3>
<PRE>
public void <B>release</B>()</PRE>
<DL>
<DD>Releases any resources this LoopTagSupport may have (or inherit).
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>release</CODE> in interface <CODE>javax.servlet.jsp.tagext.Tag</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="doStartTag()"><!-- --></A><H3>
doStartTag</H3>
<PRE>
public int <B>doStartTag</B>()
               throws javax.servlet.jsp.JspException</PRE>
<DL>
<DD>Begins iterating by processing the first item.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>doStartTag</CODE> in interface <CODE>javax.servlet.jsp.tagext.Tag</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.servlet.jsp.JspException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="doAfterBody()"><!-- --></A><H3>
doAfterBody</H3>
<PRE>
public int <B>doAfterBody</B>()
                throws javax.servlet.jsp.JspException</PRE>
<DL>
<DD>Continues the iteration when appropriate -- that is, if we (a) have
 more items and (b) don't run over our 'end' (given our 'step').
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>doAfterBody</CODE> in interface <CODE>javax.servlet.jsp.tagext.IterationTag</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.servlet.jsp.JspException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="doFinally()"><!-- --></A><H3>
doFinally</H3>
<PRE>
public void <B>doFinally</B>()</PRE>
<DL>
<DD>Removes any attributes that this LoopTagSupport set.

 <p> These attributes are intended to support scripting variables with
 NESTED scope, so we don't want to pollute attribute space by leaving
 them lying around.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>doFinally</CODE> in interface <CODE>javax.servlet.jsp.tagext.TryCatchFinally</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="doCatch(java.lang.Throwable)"><!-- --></A><H3>
doCatch</H3>
<PRE>
public void <B>doCatch</B>(java.lang.Throwable&nbsp;t)
             throws java.lang.Throwable</PRE>
<DL>
<DD>Rethrows the given Throwable.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>doCatch</CODE> in interface <CODE>javax.servlet.jsp.tagext.TryCatchFinally</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.lang.Throwable</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getCurrent()"><!-- --></A><H3>
getCurrent</H3>
<PRE>
public java.lang.Object <B>getCurrent</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../javax/servlet/jsp/jstl/core/LoopTag.html" title="interface in javax.servlet.jsp.jstl.core">LoopTag</A></CODE></B></DD>
<DD>Retrieves the current item in the iteration.  Behaves
 idempotently; calling getCurrent() repeatedly should return the same
 Object until the iteration is advanced.  (Specifically, calling
 getCurrent() does <b>not</b> advance the iteration.)
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../javax/servlet/jsp/jstl/core/LoopTag.html#getCurrent()">getCurrent</A></CODE> in interface <CODE><A HREF="../../../../../javax/servlet/jsp/jstl/core/LoopTag.html" title="interface in javax.servlet.jsp.jstl.core">LoopTag</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the current item as an object</DL>
</DD>
</DL>
<HR>

<A NAME="getLoopStatus()"><!-- --></A><H3>
getLoopStatus</H3>
<PRE>
public <A HREF="../../../../../javax/servlet/jsp/jstl/core/LoopTagStatus.html" title="interface in javax.servlet.jsp.jstl.core">LoopTagStatus</A> <B>getLoopStatus</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../javax/servlet/jsp/jstl/core/LoopTag.html" title="interface in javax.servlet.jsp.jstl.core">LoopTag</A></CODE></B></DD>
<DD>Retrieves a 'status' object to provide information about the
 current round of the iteration.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../javax/servlet/jsp/jstl/core/LoopTag.html#getLoopStatus()">getLoopStatus</A></CODE> in interface <CODE><A HREF="../../../../../javax/servlet/jsp/jstl/core/LoopTag.html" title="interface in javax.servlet.jsp.jstl.core">LoopTag</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The LoopTagStatus for the current <tt>LoopTag</tt>.</DL>
</DD>
</DL>
<HR>

<A NAME="setVar(java.lang.String)"><!-- --></A><H3>
setVar</H3>
<PRE>
public void <B>setVar</B>(java.lang.String&nbsp;id)</PRE>
<DL>
<DD>Sets the 'var' attribute.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>id</CODE> - Name of the exported scoped variable storing the current item
 of the iteration.</DL>
</DD>
</DL>
<HR>

<A NAME="setVarStatus(java.lang.String)"><!-- --></A><H3>
setVarStatus</H3>
<PRE>
public void <B>setVarStatus</B>(java.lang.String&nbsp;statusId)</PRE>
<DL>
<DD>Sets the 'varStatus' attribute.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>statusId</CODE> - Name of the exported scoped variable storing the status
 of the iteration.</DL>
</DD>
</DL>
<HR>

<A NAME="validateBegin()"><!-- --></A><H3>
validateBegin</H3>
<PRE>
protected void <B>validateBegin</B>()
                      throws javax.servlet.jsp.JspTagException</PRE>
<DL>
<DD>Ensures the "begin" property is sensible, throwing an exception
 expected to propagate up if it isn't
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.servlet.jsp.JspTagException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="validateEnd()"><!-- --></A><H3>
validateEnd</H3>
<PRE>
protected void <B>validateEnd</B>()
                    throws javax.servlet.jsp.JspTagException</PRE>
<DL>
<DD>Ensures the "end" property is sensible, throwing an exception
 expected to propagate up if it isn't
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.servlet.jsp.JspTagException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="validateStep()"><!-- --></A><H3>
validateStep</H3>
<PRE>
protected void <B>validateStep</B>()
                     throws javax.servlet.jsp.JspTagException</PRE>
<DL>
<DD>Ensures the "step" property is sensible, throwing an exception
 expected to propagate up if it isn't
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.servlet.jsp.JspTagException</CODE></DL>
</DD>
</DL>
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