<bean id="oracleLobHandler" class="org.springframework.jdbc.support.lob.OracleLobHandler"
 singleton="false">
<property name="nativeJdbcExtractor" ref="nativeJdbcExtractor"/>
     </bean>
<bean id="nativeJdbcExtractor" 
class="org.springframework.jdbc.support.nativejdbc.C3P0NativeJdbcExtractor"
      lazy-init="true"/>

/**
      * 更新指定的blob
      * @param key
      * @param contentStream
      * @param contentLength
      */
public void updateBlog(final String key, final InputStream contentStream,
final int contentLength) {
logger.debug("update content");
try {
getJdbcTemplate().execute(
"update table set content = ? where id = ?",
new AbstractLobCreatingPreparedStatementCallback(
this.lobHandler) {
protected void setValues(PreparedStatement ps,
LobCreator lobCreator) throws SQLException {
lobCreator.setBlobAsBinaryStream(ps, 1,
contentStream, contentLength);
ps.setString(2, key);
}
});
} catch (RuntimeException re) {
                 logger.warn("update content fail");
                 throw re;
           }
     }
     /**
      * 取得指定的blob
      * @param name
      * @param contentStream
      * @throws DataAclearcase/" target="_blank" >ccessException
      */
     public void getBlobContent(final String id, final OutputStream 
contentStream) throws DataAccessException {
getJdbcTemplate().query(
"SELECT content FROM table WHERE id=?", new String[] {id},
new AbstractLobStreamingResultSetExtractor() {
protected void handleNoRowFound() throws LobRetrievalFailureException {
throw new IncorrectResultSizeDataAccessException(
"Image with id '" + id + "' not found in database", 1, 0);
}
public void streamData(ResultSet rs) throws SQLException, IOException {
InputStream is = lobHandler.getBlobAsBinaryStream(rs, 1);
if (is != null) {
FileCopyUtils.copy(is, contentStream);
}
}
}
);
           }