如何得到JDBC Insert 语句执行后插入Oracle 数据库记录的主键

 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("BEGIN INSERT 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));