时间:2022-03-08 10:16:47 | 栏目:JAVA代码 | 点击:次
DemoExample example=new DemoExample ();
DemoExample.Criteria criteria=example.createCriteria();
criteria.andidEqualTo(id);
criteria.andStatusEqualTo("0");
DemoExample.Criteria criteria2=example.createCriteria();
criteria2.andidEqualTo(id);
criteria2.andstatusEqualTo("1");
example.or(criteria2);
dao.countByExample(example);
生成如下SQL
select count(*) from demo WHERE ( ID = ? and STATUS = ? ) or( ID = ? and STATUS = ? )
以上只是举例,实际不会去这样查询。
a and (b or c) <==> (a and b) or (a and c)
UserExample userExample = new UserExample();
String email = user.getEmail();
String telephone = user.getTelephone();
userExample.createCriteria().andIdNotEqualTo(userId).andEmailEqualTo(email);//(id != 'a' and email = 'b')
if (StringUtils.isNotBlank(telephone)) {
Criteria criteria = userExample.createCriteria().andIdNotEqualTo(userId).andTelephoneEqualTo(telephone);//(id != 'a' and telephone = 'c')
userExample.or(criteria);//(id != 'a' and email = 'b') or (id != 'a' and telephone = 'c')
}
List<User> userList = userService.selectByExample(userExample);