databaseloader.html

weka是机器学习和数据挖掘领域最有影响力的开源项目之一

<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the tip text</DL>
</DD>
</DL>
<HR>

<A NAME="setPassword(java.lang.String)"><!-- --></A><H3>
setPassword</H3>
<PRE>
public void <B>setPassword</B>(java.lang.String&nbsp;password)</PRE>
<DL>
<DD>Sets user password for the database
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/converters/DatabaseConverter.html#setPassword(java.lang.String)">setPassword</A></CODE> in interface <CODE><A HREF="../../../weka/core/converters/DatabaseConverter.html" title="interface in weka.core.converters">DatabaseConverter</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>password</CODE> - the password</DL>
</DD>
</DL>
<HR>

<A NAME="getPassword()"><!-- --></A><H3>
getPassword</H3>
<PRE>
public java.lang.String <B>getPassword</B>()</PRE>
<DL>
<DD>Returns the database password
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the database password</DL>
</DD>
</DL>
<HR>

<A NAME="passwordTipText()"><!-- --></A><H3>
passwordTipText</H3>
<PRE>
public java.lang.String <B>passwordTipText</B>()</PRE>
<DL>
<DD>the tip text for this property
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the tip text</DL>
</DD>
</DL>
<HR>

<A NAME="setSource(java.lang.String, java.lang.String, java.lang.String)"><!-- --></A><H3>
setSource</H3>
<PRE>
public void <B>setSource</B>(java.lang.String&nbsp;url,
                      java.lang.String&nbsp;userName,
                      java.lang.String&nbsp;password)</PRE>
<DL>
<DD>Sets the database url, user and pw
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>url</CODE> - the database url<DD><CODE>userName</CODE> - the user name<DD><CODE>password</CODE> - the password</DL>
</DD>
</DL>
<HR>

<A NAME="setSource(java.lang.String)"><!-- --></A><H3>
setSource</H3>
<PRE>
public void <B>setSource</B>(java.lang.String&nbsp;url)</PRE>
<DL>
<DD>Sets the database url
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>url</CODE> - the database url</DL>
</DD>
</DL>
<HR>

<A NAME="setSource()"><!-- --></A><H3>
setSource</H3>
<PRE>
public void <B>setSource</B>()
               throws java.lang.Exception</PRE>
<DL>
<DD>Sets the database url using the DatabaseUtils file
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if something goes wrong</DL>
</DD>
</DL>
<HR>

<A NAME="connectToDatabase()"><!-- --></A><H3>
connectToDatabase</H3>
<PRE>
public void <B>connectToDatabase</B>()</PRE>
<DL>
<DD>Opens a connection to the database
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getStructure()"><!-- --></A><H3>
getStructure</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getStructure</B>()
                       throws java.io.IOException</PRE>
<DL>
<DD>Determines and returns (if possible) the structure (internally the 
 header) of the data set as an empty set of instances.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/converters/Loader.html#getStructure()">getStructure</A></CODE> in interface <CODE><A HREF="../../../weka/core/converters/Loader.html" title="interface in weka.core.converters">Loader</A></CODE><DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/converters/AbstractLoader.html#getStructure()">getStructure</A></CODE> in class <CODE><A HREF="../../../weka/core/converters/AbstractLoader.html" title="class in weka.core.converters">AbstractLoader</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the structure of the data set as an empty set of Instances
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getDataSet()"><!-- --></A><H3>
getDataSet</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getDataSet</B>()
                     throws java.io.IOException</PRE>
<DL>
<DD>Return the full data set in batch mode (header and all intances at once).
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/converters/Loader.html#getDataSet()">getDataSet</A></CODE> in interface <CODE><A HREF="../../../weka/core/converters/Loader.html" title="interface in weka.core.converters">Loader</A></CODE><DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/converters/AbstractLoader.html#getDataSet()">getDataSet</A></CODE> in class <CODE><A HREF="../../../weka/core/converters/AbstractLoader.html" title="class in weka.core.converters">AbstractLoader</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the structure of the data set as an empty set of Instances
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is no source or parsing fails</DL>
</DD>
</DL>
<HR>

<A NAME="getNextInstance()"><!-- --></A><H3>
getNextInstance</H3>
<PRE>
public <A HREF="../../../weka/core/Instance.html" title="class in weka.core">Instance</A> <B>getNextInstance</B>()
                         throws java.io.IOException</PRE>
<DL>
<DD>Read the data set incrementally---get the next instance in the data 
 set or returns null if there are no
 more instances to get. If the structure hasn't yet been 
 determined by a call to getStructure then method does so before
 returning the next instance in the data set.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/converters/Loader.html#getNextInstance()">getNextInstance</A></CODE> in interface <CODE><A HREF="../../../weka/core/converters/Loader.html" title="interface in weka.core.converters">Loader</A></CODE><DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/converters/AbstractLoader.html#getNextInstance()">getNextInstance</A></CODE> in class <CODE><A HREF="../../../weka/core/converters/AbstractLoader.html" title="class in weka.core.converters">AbstractLoader</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the next instance in the data set as an Instance object or null
 if there are no more instances to be read
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is an error during parsing</DL>
</DD>
</DL>
<HR>

<A NAME="getOptions()"><!-- --></A><H3>
getOptions</H3>
<PRE>
public java.lang.String[] <B>getOptions</B>()</PRE>
<DL>
<DD>Gets the setting
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/OptionHandler.html#getOptions()">getOptions</A></CODE> in interface <CODE><A HREF="../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the current setting</DL>
</DD>
</DL>
<HR>

<A NAME="listOptions()"><!-- --></A><H3>
listOptions</H3>
<PRE>
public java.util.Enumeration <B>listOptions</B>()</PRE>
<DL>
<DD>Lists the available options
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/OptionHandler.html#listOptions()">listOptions</A></CODE> in interface <CODE><A HREF="../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an enumeration of the available options</DL>
</DD>
</DL>
<HR>

<A NAME="setOptions(java.lang.String[])"><!-- --></A><H3>
setOptions</H3>
<PRE>
public void <B>setOptions</B>(java.lang.String[]&nbsp;options)
                throws java.lang.Exception</PRE>
<DL>
<DD>Sets the options.

   <!-- options-start -->
 Valid options are: <p/>
 
 <pre> -url &lt;JDBC URL&gt;
  The JDBC URL to connect to.
  (default: from DatabaseUtils.props file)</pre>
 
 <pre> -user &lt;name&gt;
  The user to connect with to the database.
  (default: none)</pre>
 
 <pre> -password &lt;password&gt;
  The password to connect with to the database.
  (default: none)</pre>
 
 <pre> -Q &lt;query&gt;
  SQL query of the form
   SELECT &lt;list of columns&gt;|* FROM &lt;table&gt; [WHERE]
  to execute.
  (default: Select * From Results0)</pre>
 
 <pre> -P &lt;list of column names&gt;
  List of column names uniquely defining a DB row
  (separated by ', ').
  Used for incremental loading.
  If not specified, the key will be determined automatically,
  if possible with the used JDBC driver.
  The auto ID column created by the DatabaseSaver won't be loaded.</pre>
 
 <pre> -I
  Sets incremental loading</pre>
 
   <!-- options-end -->
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../weka/core/OptionHandler.html#setOptions(java.lang.String[])">setOptions</A></CODE> in interface <CODE><A HREF="../../../weka/core/OptionHandler.html" title="interface in weka.core">OptionHandler</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>options</CODE> - the options
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if options cannot be set</DL>
</DD>
</DL>
<HR>

<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</B>(java.lang.String[]&nbsp;options)</PRE>
<DL>
<DD>Main method.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>options</CODE> - the options</DL>
</DD>
</DL>
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