实现mybatis+Springboot 关联查询该如何弄

Drop TABLE IF EXISTS article; Create TABLE article ( id int(11) NOT NULL auto_increment, userid int(11) NOT NULL, title varchar(100) NOT NULL, content text NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;

-- 添加几条测试数据

Insert INTO article VALUES ('1', '1', 'test_title', 'test_content'); Insert INTO article VALUES ('2', '1', 'test_title_2', 'test_content_2'); Insert INTO article VALUES ('3', '1', 'test_title_3', 'test_content_3'); Insert INTO article VALUES ('4', '1', 'test_title_4', 'test_content_4');