jdbccategorydataset.html

JFreeChart 9.20的文档 需要用JAVA在网页上做统计图的东东

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<TD><B>Methods inherited from class java.lang.Object</B></TD>
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<TD><B>Methods inherited from interface org.jfree.data.<A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A></B></TD>
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<A NAME="JDBCCategoryDataset(java.lang.String, java.lang.String, java.lang.String, java.lang.String)"><!-- --></A><H3>
JDBCCategoryDataset</H3>
<PRE>
public <B>JDBCCategoryDataset</B>(java.lang.String&nbsp;url,
                           java.lang.String&nbsp;driverName,
                           java.lang.String&nbsp;user,
                           java.lang.String&nbsp;passwd)
                    throws java.lang.ClassNotFoundException,
                           java.sql.SQLException</PRE>
<DL>
<DD>Creates a new dataset with a database connection.
<P>
<DT><B>Parameters:</B><DD><CODE>url</CODE> - the URL of the database connection.<DD><CODE>driverName</CODE> - the database driver class name.<DD><CODE>user</CODE> - the database user.<DD><CODE>passwd</CODE> - the database user's password.
<DT><B>Throws:</B>
<DD><CODE>java.lang.ClassNotFoundException</CODE> - if the driver cannot be found.
<DD><CODE>java.sql.SQLException</CODE> - if there is an error obtaining a connection to the database.</DL>
<HR>

<A NAME="JDBCCategoryDataset(java.sql.Connection)"><!-- --></A><H3>
JDBCCategoryDataset</H3>
<PRE>
public <B>JDBCCategoryDataset</B>(java.sql.Connection&nbsp;connection)</PRE>
<DL>
<DD>Create a new dataset with the given database connection.
<P>
<DT><B>Parameters:</B><DD><CODE>connection</CODE> - the database connection.</DL>
<HR>

<A NAME="JDBCCategoryDataset(java.sql.Connection, java.lang.String)"><!-- --></A><H3>
JDBCCategoryDataset</H3>
<PRE>
public <B>JDBCCategoryDataset</B>(java.sql.Connection&nbsp;connection,
                           java.lang.String&nbsp;query)
                    throws java.sql.SQLException</PRE>
<DL>
<DD>Creates a new dataset with the given database connection, and executes the supplied
 query to populate the dataset.
<P>
<DT><B>Parameters:</B><DD><CODE>connection</CODE> - the connection.<DD><CODE>query</CODE> - the query.
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - if there is a problem executing the query.</DL>

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<A NAME="getTranspose()"><!-- --></A><H3>
getTranspose</H3>
<PRE>
public boolean <B>getTranspose</B>()</PRE>
<DL>
<DD>Returns a flag that controls whether or not the table values are transposed when added
 to the dataset.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>A boolean.</DL>
</DD>
</DL>
<HR>

<A NAME="setTranspose(boolean)"><!-- --></A><H3>
setTranspose</H3>
<PRE>
public void <B>setTranspose</B>(boolean&nbsp;transpose)</PRE>
<DL>
<DD>Sets a flag that controls whether or not the table values are transposed when added to
 the dataset.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>transpose</CODE> - the flag.</DL>
</DD>
</DL>
<HR>

<A NAME="executeQuery(java.lang.String)"><!-- --></A><H3>
executeQuery</H3>
<PRE>
public void <B>executeQuery</B>(java.lang.String&nbsp;query)
                  throws java.sql.SQLException</PRE>
<DL>
<DD>Populates the dataset by executing the supplied query against the existing database
 connection.  If no connection exists then no action is taken.
 <p>
 The results from the query are extracted and cached locally, thus applying an upper
 limit on how many rows can be retrieved successfully.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>query</CODE> - the query.
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - if there is a problem executing the query.</DL>
</DD>
</DL>
<HR>

<A NAME="executeQuery(java.sql.Connection, java.lang.String)"><!-- --></A><H3>
executeQuery</H3>
<PRE>
public void <B>executeQuery</B>(java.sql.Connection&nbsp;con,
                         java.lang.String&nbsp;query)
                  throws java.sql.SQLException</PRE>
<DL>
<DD>Populates the dataset by executing the supplied query against the existing database
 connection.  If no connection exists then no action is taken.
 <p>
 The results from the query are extracted and cached locally, thus applying an upper
 limit on how many rows can be retrieved successfully.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>con</CODE> - the connection.<DD><CODE>query</CODE> - the query.
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - if there is a problem executing the query.</DL>
</DD>
</DL>
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