mybatis insert语句 返回插入的记录的主键值

Map<String,Object> paymentMp = new HashMap<String,Object>();
        paymentMp.put("amount", 12.0 );
        paymentMp.put("pay", Attributes.Payment_Pay_No);
        paymentMp.put("status", Attributes.Payment_Status_NoStatus);
        paymentMp.put("payCode", Attributes.Payment_PayCode_ZhiFuBao  );
        
        dao.save("SearchCarMapper.paymentInsertWithNoPay", paymentMp);
        
        System.out.println("--id is:"+paymentMp.get("id"));

<insert id="paymentInsertWithNoPay"  parameterType="java.util.HashMap" useGeneratedKeys="true" keyProperty="id" >
        
        <![CDATA[
            insert into payment set amount=#{amount},body="",outTradeNO="",paidAmount=0.0,pay=#{pay},payCode=#{payCode},returnMoney=0.0,returnReason=‘‘,
                    status=#{status},subject=‘‘,tradeNO=‘‘
        ]]>  
    </insert>

解释：

useGeneratedKeys:是否生成主键

keyProperty = "id" ，sql执行完毕后，传入参数HashMap  就会被自动附上id=新生成记录的id值