假设要找用户姓名中即含“李”又含“香”的用户,mysql中用like可以解决,语句为:
SELECT * FROM user WHERE u_name LIKE '%李%' and u_name like '%香%';如果要用Mybatis来实现的话,首先在UserMapper.java中声明一个selectIllegibilityByName方法:
List<User> selectIllegibilityByName(List<String> names);
names是一个由单个字符串组合成的字符串列表,这样我们可以将自己想要查询的字符都添加进去,方法为:
String value = "李香"; List<String> search = new ArrayList<>(); for(int i=0;i<value.length();i++){ search.add(String.valueOf(value.charAt(i))); }而在UserMapper.xml中,我们可以这么实现:
<select id="selectIllegibilityByName" resultMap="BaseResultMap"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> select <include refid="Base_Column_List" /> from user where <foreach item="item" index="index" collection="list" open="(" separator="and" close=")"> u_name like CONCAT('%',#{item},'%') </foreach> order by id </select>