resultset.java

java数据库源代码 请看看啊 提点宝贵的意见

    byte[] getBytes(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Date</code> object in the Java programming language.
     *
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.sql.Date getDate(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Time</code> object in the Java programming language.
     *
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.sql.Time getTime(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Timestamp</code> object in the Java programming language.
     *
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.sql.Timestamp getTimestamp(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a stream of ASCII characters. The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <char>LONGVARCHAR</char> values.
     * The JDBC driver will
     * do any necessary conversion from the database format into ASCII.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream.  Also, a
     * stream may return <code>0</code> when the method
     * <code>InputStream.available</code>
     * is called whether there is data available or not.
     *
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a Java input stream that delivers the database column value
     * as a stream of one-byte ASCII characters;
     * if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.io.InputStream getAsciiStream(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * as a stream of two-byte Unicode characters. The first byte is
     * the high byte; the second byte is the low byte.
     *
     * The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARCHAR</code>values.  The 
     * JDBC driver will do any necessary conversion from the database
     * format into Unicode.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream.  
     * Also, a stream may return <code>0</code> when the method 
     * <code>InputStream.available</code>
     * is called, whether there is data available or not.
     *
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a Java input stream that delivers the database column value
     *         as a stream of two-byte Unicode characters;
     *         if the value is SQL <code>NULL</code>, the value returned is 
     *         <code>null</code>
     *
     * @exception SQLException if a database access error occurs
     * @deprecated use <code>getCharacterStream</code> in place of 
     *              <code>getUnicodeStream</code>
     */
    java.io.InputStream getUnicodeStream(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a binary stream of
     * uninterpreted bytes. The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARBINARY</code> values.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream.  Also, a
     * stream may return <code>0</code> when the method 
     * <code>InputStream.available</code>
     * is called whether there is data available or not.
     *
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a Java input stream that delivers the database column value
     *         as a stream of uninterpreted bytes;
     *         if the value is SQL <code>NULL</code>, the value returned is 
     *         <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.io.InputStream getBinaryStream(int columnIndex)
        throws SQLException;


    //======================================================================
    // Methods for accessing results by column name
    //======================================================================

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>String</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    String getString(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>boolean</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>false</code>
     * @exception SQLException if a database access error occurs
     */
    boolean getBoolean(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>byte</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if a database access error occurs
     */
    byte getByte(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>short</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if a database access error occurs
     */
    short getShort(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * an <code>int</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if a database access error occurs
     */
    int getInt(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>long</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if a database access error occurs
     */
    long getLong(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>float</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if a database access error occurs
     */
    float getFloat(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>double</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if a database access error occurs
     */
    double getDouble(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.math.BigDecimal</code> in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @param scale the number of digits to the right of the decimal point
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     * @deprecated
     */
    BigDecimal getBigDecimal(String columnName, int scale) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>byte</code> array in the Java programming language.
     * The bytes represent the raw values returned by the driver.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    byte[] getBytes(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Date</code> object in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.sql.Date getDate(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row  
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Time</code> object in the Java programming language.
     *
     * @param columnName the SQL name of the column
     * @return the column value; 
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.sql.Time getTime(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Timestamp</code> object.
     *
     * @param columnName the SQL name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if a database access error occurs
     */
    java.sql.Timestamp getTimestamp(String columnName) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a stream of
     * ASCII characters. The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARCHAR</code> values.
     * The JDBC driver will
     * do any necessary conversion from the database format into ASCII.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream. Also, a
     * stream may return <code>0</code> when the method <code>available</code>
     * is called whether there is data available or not.
     *
     * @param columnName the SQL name of the column
     * @return a Java input stream that delivers the database column value
     * as a stream of one-byte ASCII characters.
     * If the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code>.
     * @exception SQLException if a database access error occurs