xbatis 一款非常好用 ORM 框架,它是如何多表 join 查询的?
联表查询 内联查询 java public class Demo { @Autowired private SysUserMapper sysUserMapper; public void page() { Pager<SysUser> pager= QueryChain.of(sysUserMapper) .join(SysUser::getRoleId, SysRole::getId) .like(SysUser::getUserName,"abc") .paging(Pager.of(1)); } } 左联查询 左联查询 适合1对1情况,如果不是,则分页时需要关闭框架优化:Pager.of(1).setOptimize(false) java public class Demo { @Autowired private SysUserMapper sysUserMapper; public void page() { Pager<SysUser> pager= QueryChain.of(sysUserMap...