servletutilities.html

jfreechart1。0。2的api。

 SPECIAL NOTE: Please avoid using JPEG as an image format for charts,
 it is a "lossy" format that introduces visible distortions in the
 resulting image - use PNG instead.  In addition, note that JPEG output
 is supported by JFreeChart only for JRE 1.4.2 or later.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>chart</CODE> - the JFreeChart to be saved.<DD><CODE>width</CODE> - the width of the chart.<DD><CODE>height</CODE> - the height of the chart.<DD><CODE>session</CODE> - the HttpSession of the client (if <code>null</code>, the
                 temporary file is marked as "one-time" and deleted by 
                 the <A HREF="../../../../org/jfree/chart/servlet/DisplayChart.html" title="class in org.jfree.chart.servlet"><CODE>DisplayChart</CODE></A> servlet right after it is
                 streamed to the client).
<DT><B>Returns:</B><DD>The filename of the chart saved in the temporary directory.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is a problem saving the file.</DL>
</DD>
</DL>
<HR>

<A NAME="saveChartAsJPEG(org.jfree.chart.JFreeChart, int, int, org.jfree.chart.ChartRenderingInfo, javax.servlet.http.HttpSession)"><!-- --></A><H3>
saveChartAsJPEG</H3>
<PRE>
public static java.lang.String <A HREF="../../../../src-html/org/jfree/chart/servlet/ServletUtilities.html#line.247"><B>saveChartAsJPEG</B></A>(<A HREF="../../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A>&nbsp;chart,
                                               int&nbsp;width,
                                               int&nbsp;height,
                                               <A HREF="../../../../org/jfree/chart/ChartRenderingInfo.html" title="class in org.jfree.chart">ChartRenderingInfo</A>&nbsp;info,
                                               javax.servlet.http.HttpSession&nbsp;session)
                                        throws java.io.IOException</PRE>
<DL>
<DD>Saves the chart as a JPEG format file in the temporary directory and
 populates the <code>ChartRenderingInfo</code> object which can be used 
 to generate an HTML image map.
 <p>
 SPECIAL NOTE: Please avoid using JPEG as an image format for charts,
 it is a "lossy" format that introduces visible distortions in the
 resulting image - use PNG instead.  In addition, note that JPEG output
 is supported by JFreeChart only for JRE 1.4.2 or later.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>chart</CODE> - the chart to be saved (<code>null</code> not permitted).<DD><CODE>width</CODE> - the width of the chart<DD><CODE>height</CODE> - the height of the chart<DD><CODE>info</CODE> - the ChartRenderingInfo object to be populated<DD><CODE>session</CODE> - the HttpSession of the client (if <code>null</code>, the
                 temporary file is marked as "one-time" and deleted by 
                 the <A HREF="../../../../org/jfree/chart/servlet/DisplayChart.html" title="class in org.jfree.chart.servlet"><CODE>DisplayChart</CODE></A> servlet right after it is
                 streamed to the client).
<DT><B>Returns:</B><DD>The filename of the chart saved in the temporary directory
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is a problem saving the file.</DL>
</DD>
</DL>
<HR>

<A NAME="createTempDir()"><!-- --></A><H3>
createTempDir</H3>
<PRE>
protected static void <A HREF="../../../../src-html/org/jfree/chart/servlet/ServletUtilities.html#line.279"><B>createTempDir</B></A>()</PRE>
<DL>
<DD>Creates the temporary directory if it does not exist.  Throws a 
 <code>RuntimeException</code> if the temporary directory is 
 <code>null</code>.  Uses the system property <code>java.io.tmpdir</code> 
 as the temporary directory.  This sounds like a strange thing to do but 
 my temporary directory was not created on my default Tomcat 4.0.3 
 installation.  Could save some questions on the forum if it is created 
 when not present.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="registerChartForDeletion(java.io.File, javax.servlet.http.HttpSession)"><!-- --></A><H3>
registerChartForDeletion</H3>
<PRE>
protected static void <A HREF="../../../../src-html/org/jfree/chart/servlet/ServletUtilities.html#line.301"><B>registerChartForDeletion</B></A>(java.io.File&nbsp;tempFile,
                                               javax.servlet.http.HttpSession&nbsp;session)</PRE>
<DL>
<DD>Adds a <A HREF="../../../../org/jfree/chart/servlet/ChartDeleter.html" title="class in org.jfree.chart.servlet"><CODE>ChartDeleter</CODE></A> object to the session object with the name 
 <code>JFreeChart_Deleter</code> if there is not already one bound to the 
 session and adds the filename to the list of charts to be deleted.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>tempFile</CODE> - the file to be deleted.<DD><CODE>session</CODE> - the HTTP session of the client.</DL>
</DD>
</DL>
<HR>

<A NAME="sendTempFile(java.lang.String, javax.servlet.http.HttpServletResponse)"><!-- --></A><H3>
sendTempFile</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/jfree/chart/servlet/ServletUtilities.html#line.328"><B>sendTempFile</B></A>(java.lang.String&nbsp;filename,
                                javax.servlet.http.HttpServletResponse&nbsp;response)
                         throws java.io.IOException</PRE>
<DL>
<DD>Binary streams the specified file in the temporary directory to the
 HTTP response in 1KB chunks.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filename</CODE> - the name of the file in the temporary directory.<DD><CODE>response</CODE> - the HTTP response object.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is an I/O problem.</DL>
</DD>
</DL>
<HR>

<A NAME="sendTempFile(java.io.File, javax.servlet.http.HttpServletResponse)"><!-- --></A><H3>
sendTempFile</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/jfree/chart/servlet/ServletUtilities.html#line.343"><B>sendTempFile</B></A>(java.io.File&nbsp;file,
                                javax.servlet.http.HttpServletResponse&nbsp;response)
                         throws java.io.IOException</PRE>
<DL>
<DD>Binary streams the specified file to the HTTP response in 1KB chunks.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - the file to be streamed.<DD><CODE>response</CODE> - the HTTP response object.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is an I/O problem.</DL>
</DD>
</DL>
<HR>

<A NAME="sendTempFile(java.io.File, javax.servlet.http.HttpServletResponse, java.lang.String)"><!-- --></A><H3>
sendTempFile</H3>
<PRE>
public static void <A HREF="../../../../src-html/org/jfree/chart/servlet/ServletUtilities.html#line.370"><B>sendTempFile</B></A>(java.io.File&nbsp;file,
                                javax.servlet.http.HttpServletResponse&nbsp;response,
                                java.lang.String&nbsp;mimeType)
                         throws java.io.IOException</PRE>
<DL>
<DD>Binary streams the specified file to the HTTP response in 1KB chunks.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - the file to be streamed.<DD><CODE>response</CODE> - the HTTP response object.<DD><CODE>mimeType</CODE> - the mime type of the file, null allowed.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is an I/O problem.</DL>
</DD>
</DL>
<HR>

<A NAME="searchReplace(java.lang.String, java.lang.String, java.lang.String)"><!-- --></A><H3>
searchReplace</H3>
<PRE>
public static java.lang.String <A HREF="../../../../src-html/org/jfree/chart/servlet/ServletUtilities.html#line.421"><B>searchReplace</B></A>(java.lang.String&nbsp;inputString,
                                             java.lang.String&nbsp;searchString,
                                             java.lang.String&nbsp;replaceString)</PRE>
<DL>
<DD>Perform a search/replace operation on a String
 There are String methods to do this since (JDK 1.4)
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>inputString</CODE> - the String to have the search/replace operation.<DD><CODE>searchString</CODE> - the search String.<DD><CODE>replaceString</CODE> - the replace String.
<DT><B>Returns:</B><DD>The String with the replacements made.</DL>
</DD>
</DL>
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