mybatis——逆向工程中 where （条件1）and （条件2 or 条件3 or 条件4）

Posted 2020-11-27 ixfcao

where （条件1）and （条件2 or 条件3 or 条件4）

= where （条件1 and 条件2）or （条件1 and 条件3） or （条件1 and 条件4）

 

 

 结果 是这样的 

WHERE ( birthdate between ? and ? and username like ? ) or( birthdate between ? and ? and email like ? ) or( birthdate between ? and ? and phone like ? ) 

 

 

1. 在Example中每一个criteria相当于一个括号，把里面的内容当作一个整体。

Where(userid=’1’ and name=’2’)

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UserExample example = new UserExample(); UserExample.Criteria c1 = example.createCriteria(); C1.andUseridEqualTo(“1”); C2.andNameEqualTo(“2”);

C1.andUseridEqualTo(“1”).andNameEqualTo(“2”);也可

 

2. 在criteria中没有直接的or。

(1) where(A and B) or (C and D)

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BasePointsExample.Criteria criteria1 = example.createCriteria();            criteria1.andUseridEqualTo(\'11\');            criteria1.andPointnameLike(StringUtil.concatlike(\'22\'));     BasePointsExample.Criteria criteria2 = example.createCriteria();            criteria2.andUsernameEqualTo(\'33\');            criteria2.andPointcontentLike(StringUtil.concatlike(\'44\'));  example.or(criteria2);

(2)where A and (B or C)

==>(A and B) or (A and C)

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BasePointsExample.Criteria criteria1 = example.createCriteria();       criteria1.andUseridEqualTo(\'11\');       criteria1.andPointnameLike(StringUtil.concatlike(\'22\'));          BasePointsExample.Criteria criteria2 = example.createCriteria();       criteria2.andUseridEqualTo(\'11\');       criteria2.andPointcontentLike(StringUtil.concatlike(\'33\'));       example.or(criteria2);