关于sql server2000 中image字段的操作问题,java语言

[JonasB]

我想从表A中message_body（image字段）取出内容，然后放到表B中的body字段(image类型)
操作表A时，使用rs.getBinaryStream("message_body");
操作表B时，ps为PreparedStatement，
ps.setBinaryStream(1, rs.getBinaryStream("message_body"),?);
那么"?"那个位置应该是什么，谢谢。

[lynx1111]

setBinaryStream
public void setBinaryStream(int parameterIndex,
InputStream x,
int length)
throws SQLException
Sets the designated parameter to the given input stream, which will have the specified number of bytes. When a very large binary value is input to a LONGVARBINARY parameter, it may be more practical to send it via a java.io.InputStream object. The data will be read from the stream as needed until end-of-file is reached.
Note: This stream object can either be a standard Java stream object or your own subclass that implements the standard interface.


Parameters:
parameterIndex - the first parameter is 1, the second is 2, ...
x - the java input stream which contains the binary parameter value
length - the number of bytes in the stream
Throws:
SQLException - if a database access error occurs
----------------------
length - the number of bytes in the stream

[JonasB]

用什么方法去这个流的长度，谢谢