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javax.servlet.ServletException: oracle.jdbc.driver.ScrollableResultSet.getBlob(Ljava/lang/String;)Ljava/sql/Blob;这是什么东东

www.MyException.Cn  网友分享于:2013-11-15  浏览:1196次
javax.servlet.ServletException: oracle.jdbc.driver.ScrollableResultSet.getBlob(Ljava/lang/String;)Ljava/sql/Blob;这是什么错误?
一段代码,仅是写入数据库的一段简单代码,其中有blob字段,分别在两台机器上测试,一台上就没有问题,另一台上报:javax.servlet.ServletException: oracle.jdbc.driver.ScrollableResultSet.getBlob(Ljava/lang/String;)Ljava/sql/Blob; 检查DB后发现,BLOB数据没有插进去,请教一下这是什么错误?怎样解决?谢谢

------解决方案--------------------
你到底是查询还是写数据哦?
------解决方案--------------------

为什么要强制转换?

难道java.sql.ResultSet的功能你觉得还不够拉风?
Java code

/**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>Blob</code> object
     * in the Java programming language.
     *
     * @param colName the name of the column from which to retrieve the value
     * @return a <code>Blob</code> object representing the SQL <code>BLOB</code> 
     *         value in the specified column
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    Blob getBlob(String colName) throws SQLException;


/**
     * Retrieves a stream that can be used to write to the <code>BLOB</code> 
     * value that this <code>Blob</code> object represents.  The stream begins
     * at position <code>pos</code>.
     *
     * @param pos the position in the <code>BLOB</code> value at which
     *        to start writing
     * @return a <code>java.io.OutputStream</code> object to which data can 
     *         be written
     * @exception SQLException if there is an error accessing the
     *            <code>BLOB</code> value
     * @see #getBinaryStream
     * @since 1.4
     */
    java.io.OutputStream setBinaryStream(long pos) throws SQLException;

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