java 向 oracle 的字段 Blob 写图片问题

                        File file = new File(_sp.get_file1());   
    fis = new FileInputStream(file); 
System.out.println( (int) file.length()) ;
    ps.setBinaryStream(10, fis, (int) file.length());   
    ps.executeUpdate() ;

报错
12411
java.sql.SQLException: 无法从套接字读取更多的数据
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java)
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java)
at oracle.jdbc.ttc7.MAREngine.unmarshalUB1(MAREngine.java)
at oracle.jdbc.ttc7.MAREngine.unmarshalSB1(MAREngine.java)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java)
at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java)
at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java)
at com.xlh.data.daoImpl.SpDaoImpl.addSp(SpDaoImpl.java:42)
at com.xlh.data.daoImpl.TestSpDaoImpl.testaddSp(TestSpDaoImpl.java:34)
at sun.reflect.NativeMethodAccessorImpl.invok