mybatis 插入返回自增后的id

//serviceImpl
int customerId = customerDao.insertDynamic(customer1);
System.out.println("id===================="+customer1.getId());

　　

useGeneratedKeys:开启获取主键

keyProperty:那个字段是主键

<insert id="insertDynamic" parameterType="com.wftdlx.carApi.entity.Customer"  useGeneratedKeys="true" keyProperty="id">
        insert into customer
        <trim prefix="(" suffix=")" suffixOverrides="," >
            <if test="id != null" >
                id,
            </if>
            <if test="activedate != null" >
                activedate,
            </if>

        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides="," >
            <if test="id != null" >
                #{id,jdbcType=BIGINT},
            </if>
            <if test="activedate != null" >
                #{activedate,jdbcType=VARCHAR},
            </if>

        </trim>
    </insert>

　　输出:id====================195466