JDBC插入操作时，通过return返回主键

转载自：http://blog.csdn.net/kkdelta/article/details/4640029

在应用中，很多时候会对表的主键用一个自动增涨的数来付值，如Oracle的sequence，插入后又想得到的主键的值。下面介绍一下相关的方法。

1，用Oracle 的returning 语句。

PreparedStatement  sta = conn.prepareStatement("INSERT INTO LOGGING VALUES (TESTSEQ.NEXTVAL,SYSDATE)returning id into ? ");

  sta.execute();

  ResultSet rset = sta.getResultSet();

  while(rset.next())

    {

      int id = rset.getInt(1);

    }

如果是既有传入值,又有返回值的话,应该:

PreparedStatement  sta = conn.prepareStatement("BEGININSERT INTO LOGGING VALUES

(TESTSEQ.NEXTVAL,? )returning id into ?; END; ");

sta = conn.prepareCall(sqlText);

sta .setString(1, srqID);

sta .registerOutParameter(2, Types.NUMERIC);

sta .execute();

return sta .getLong(2);

或者用oracle的 OraclePreparedStatement

            String sql = "insert into test values(1,?) returning  id into ?";

            OraclePreparedStatement pstt = (OraclePreparedStatement) conn.prepareStatement(sql);

            pstt.setString(1, "xxx");

            pstt.registerReturnParameter(2, OracleTypes.INTEGER);

            pstt.executeUpdate();

            ResultSet rset = pstt.getReturnResultSet(); // rest is not null

           

            while (rset.next()) {

                int id = rset.getInt(1);

                System.out.println("Insert returnning: " + id);

            }

2,用JDBC的getGeneratedKeys，返回的是Oracle 的rowid.

PreparedStatement  sta = conn.prepareStatement("INSERT INTO TESTTABLE VALUES (TESTSEQ.NEXTVAL,'aaaa')",Statement.RETURN_GENERATED_KEYS);

  sta.execute();

 

  System.out.println(sta.getGeneratedKeys());

  ResultSet rest = sta.getGeneratedKeys();

  rest.next();

  //oracle rowid

  System.out.println(rest.getString(1));