如何从Java调用oracle函数。 函数返回编号

Question

How should I call an Oracle function from Java? The function is supposed to return a number.

        CallableStatement cstmt = mJConn.prepareCall("{? = call fnd_request.submit_request( application => 'FND', program => 'JAVACONINSERT', description => 'CSV to DB Insert via Java' ,start_time => sysdate ,sub_request => FALSE, argument1 => '/home/TEST/java/t1.txt')}");
            cstmt.registerOutParameter(1, Types.INTEGER);
            cstmt.executeUpdate();
            int reqId = cstmt.getInt(1);
        System.out.println(reqId);          

Answer 1

Try replacing

String call = "{?= CALL Proc(?)}";

with

String call = "{CALL Proc(?, ?)}";

The former syntax is for calling a stored function, and the new one is for a stored procedure.

You can also to swap the order of the bind parameters :

cs.setString(1, "String");
cs.registerOutParameter(2, Types.INTEGER);