MyBatis新增数据时自增id的两种写法小结

    public interface PlayerDao {
        int insertOnePlayer(Player player);
        int insertOnePlayer2(Player player);
    }

   public void testInsertGenerateId1() throws IOException {
           // 2.获取sqlSession
           SqlSession sqlSession = sqlSessionFactory.openSession();
           // 3.获取对应mapper
           PlayerDao mapper = sqlSession.getMapper(PlayerDao.class);
           // 4.执行查询语句并返回结果
           Player player = new Player();
           player.setPlayName("Allen Iverson");
           player.setPlayNo(3);
           player.setTeam("76ers");
           player.setHeight(1.83F);
           mapper.insertOnePlayer(player);
           sqlSession.commit();
           System.out.println(player.getId());
       }

      <insert id="insertOnePlayer" parameterType="Player" useGeneratedKeys="true" keyProperty="id">
     		insert into tb_player (id, playName, playNo,team, height)
     		values (
                 #{id,jdbcType=INTEGER},
                 #{playName,jdbcType=VARCHAR},
                 #{playNo,jdbcType=INTEGER},
                 #{team,jdbcType=VARCHAR},
                 #{height,jdbcType=DECIMAL}
     		)
     	</insert>

    public void testInsertGenerateId2() throws IOException {
            // 2.获取sqlSession
            SqlSession sqlSession = sqlSessionFactory.openSession();
            // 3.获取对应mapper
            PlayerDao mapper = sqlSession.getMapper(PlayerDao.class);
            // 4.执行查询语句并返回结果
            Player player = new Player();
            player.setPlayName("Tony Parker");
            player.setPlayNo(9);
            player.setTeam("spurs");
            player.setHeight(1.88F);
            mapper.insertOnePlayer2(player);
            sqlSession.commit();
            System.out.println(player.getId());
        }
    
    
    Mapper文件：
   <insert id="insertOnePlayer2" parameterType="Player">
           <selectKey  keyProperty="id" order="AFTER" resultType="int">
               select LAST_INSERT_ID()
           </selectKey>
           insert into tb_player (id, playName, playNo,team, height)
           values (
           #{id,jdbcType=INTEGER},
           #{playName,jdbcType=VARCHAR},
           #{playNo,jdbcType=INTEGER},
           #{team,jdbcType=VARCHAR},
           #{height,jdbcType=DECIMAL}
           )
       </insert>

  <insert id="insertBatch" parameterType="java.util.List" useGeneratedKeys="true" keyProperty="id">
   INSERT INTO partition_info (id, node_ip_id, init_schema_info_id,
   prefix_table_index, partition_num, start_time,
   end_time, create_time, is_delete
   )
   values
   <foreach collection="list" item="item" index="index" separator=",">
     (#{item.id,jdbcType=INTEGER}, #{item.nodeIpId,jdbcType=INTEGER}, #{item.initSchemaInfoId,jdbcType=INTEGER},
     #{item.prefixTableIndex,jdbcType=VARCHAR}, #{item.partitionNum,jdbcType=VARCHAR}, #{item.startTime,jdbcType=TIMESTAMP},
     #{item.endTime,jdbcType=TIMESTAMP}, #{item.createTime,jdbcType=TIMESTAMP}, #{item.isDelete,jdbcType=TINYINT}
     )
   </foreach>
 </insert>

        System.out.println("before insert ...");
        for (PartitionInfo p: list) {
            System.out.println(p);
        }

        PartitionInfoMapper mapper = sqlSession.getMapper(PartitionInfoMapper.class);
        int i = mapper.insertBatch(list);
        System.out.println("The rows be affected :" + i);

        System.out.println("after insert ...");
        for (PartitionInfo p: list) {
            System.out.println(p);
        }