mybatis获取insert数据的主键

//假定params是接收到的Map<String,Object>的参数集合
mapper.saveTest(users);
params.get("testId")即可拿到新增的主键id

<insert id="saveTest" parameterType="map" keyProperty="testId" useGeneratedKeys="true">
insert into Test(name) values(#{name})
</insert>

parameterType也可以用实体类对象

public static class Test{

private int testId;

private String name;

getter和setter

}

//假定params是接收到的Map<String,Object>的参数集合
Test user=new Test();
BeanUtils.copyProperties(user, params);//将属性复制到类对象中
mapper.saveTest(users);
user.getTestId()即可拿到新增的主键id