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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Sep 11 11:26:54 BST 2003 --><TITLE>JDBCPieDataset (JFreeChart Class Library (version 0.9.12))</TITLE><META NAME="keywords" CONTENT="org.jfree.data.JDBCPieDataset,JDBCPieDataset class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><SCRIPT>function asd(){parent.document.title="JDBCPieDataset (JFreeChart Class Library (version 0.9.12))";}</SCRIPT><BODY BGCOLOR="white" onload="asd();"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../org/jfree/data/JDBCCategoryDataset.html"><B>PREV CLASS</B></A> <A HREF="../../../org/jfree/data/JDBCXYDataset.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="JDBCPieDataset.html" TARGET="_top"><B>NO FRAMES</B></A> <SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT><A HREF="../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.jfree.data</FONT><BR>Class JDBCPieDataset</H2><PRE>java.lang.Object | +--<A HREF="../../../org/jfree/data/AbstractDataset.html">org.jfree.data.AbstractDataset</A> | +--<A HREF="../../../org/jfree/data/DefaultPieDataset.html">org.jfree.data.DefaultPieDataset</A> | +--<B>org.jfree.data.JDBCPieDataset</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.lang.Cloneable, <A HREF="../../../org/jfree/data/Dataset.html">Dataset</A>, <A HREF="../../../org/jfree/data/KeyedValues.html">KeyedValues</A>, java.io.ObjectInputValidation, <A HREF="../../../org/jfree/data/PieDataset.html">PieDataset</A>, java.io.Serializable, <A HREF="../../../org/jfree/data/Values.html">Values</A></DD></DL><HR><DL><DT>public class <B>JDBCPieDataset</B><DT>extends <A HREF="../../../org/jfree/data/DefaultPieDataset.html">DefaultPieDataset</A></DL><P>A <A HREF="../../../org/jfree/data/PieDataset.html"><CODE>PieDataset</CODE></A> that reads data from a database via JDBC. <P> A query should be supplied that returns data in two columns, the first containing VARCHAR data, and the second containing numerical data. The data is cached in-memory and can be refreshed at any time.<P><P><DL><DT><B>Author:</B></DT> <DD>Bryan Scott.</DD><DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html" TARGET="org.jfree.data.JDBCPieDataset">Serialized Form</A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../org/jfree/data/JDBCPieDataset.html#JDBCPieDataset()">JDBCPieDataset</A></B>()</CODE><BR> Creates a new JDBCPieDataset with no database connection.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../org/jfree/data/JDBCPieDataset.html#JDBCPieDataset(java.sql.Connection)">JDBCPieDataset</A></B>(java.sql.Connection con)</CODE><BR> Creates a new JDBCPieDataset using a pre-existing database connection.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../org/jfree/data/JDBCPieDataset.html#JDBCPieDataset(java.sql.Connection, java.lang.String)">JDBCPieDataset</A></B>(java.sql.Connection con, java.lang.String query)</CODE><BR> Creates a new JDBCPieDataset using a pre-existing database connection.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../org/jfree/data/JDBCPieDataset.html#JDBCPieDataset(java.lang.String, java.lang.String, java.lang.String, java.lang.String)">JDBCPieDataset</A></B>(java.lang.String url, java.lang.String driverName, java.lang.String user, java.lang.String passwd)</CODE><BR> Creates a new JDBCPieDataset and establishes a new database connection.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/JDBCPieDataset.html#executeQuery(java.sql.Connection, java.lang.String)">executeQuery</A></B>(java.sql.Connection con, java.lang.String query)</CODE><BR> ExecuteQuery will attempt execute the query passed to it against the existing database connection.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/JDBCPieDataset.html#executeQuery(java.lang.String)">executeQuery</A></B>(java.lang.String query)</CODE><BR> ExecuteQuery will attempt execute the query passed to it against the existing database connection.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_org.jfree.data.DefaultPieDataset"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class org.jfree.data.<A HREF="../../../org/jfree/data/DefaultPieDataset.html">DefaultPieDataset</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../org/jfree/data/DefaultPieDataset.html#clone()">clone</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#equals(java.lang.Object)">equals</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#getIndex(java.lang.Comparable)">getIndex</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#getItemCount()">getItemCount</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#getKey(int)">getKey</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#getKeys()">getKeys</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#getValue(java.lang.Comparable)">getValue</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#getValue(int)">getValue</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#setValue(java.lang.Comparable, double)">setValue</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html#setValue(java.lang.Comparable, java.lang.Number)">setValue</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_org.jfree.data.AbstractDataset"><!-- --></A>⌨️ 快捷键说明
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