mapWithKey(query)

说明

把列表转成一个Map,KEY为指定字段的值

Mapper 内置方法

• map(多个ID)：多个ID，以ID为KEY
• mapWithKey(KEY字段,多个ID)：多个ID
• mapWithKey(KEY字段,Where)：动态条件

动态where查询

public class Demo {
    @Autowired
    private SysUserMapper sysUserMapper;
    
    public void mapWithKey() {
       Map<Integer,SysUser> map= sysUserMapper.mapWithKey(SysUser::getId,where->{
           where.like(SysUser::getUserName,"abc");
       });
    }
}

基于QueryChain(强大)

可构建复杂的场景, 更多操作前往 链路查询 - QueryChain ！

public class Demo {
    @Autowired
    private SysUserMapper sysUserMapper;

    public void mapWithKey() {
        Map<Integer,SysUser> map= QueryChain.of(sysUserMapper)
                .like(SysUser::getUserName,"abc")
                .limit(10)
                .mapWithKey(SysUser::getId);
    }
}