MyBatis 中 like的使用

1、参数中直接添加%%

param.setUsername("%CD%");
param.setPassword("%11%");  

<select  id="selectPersons" resultType="person" parameterType="person">
        select id,sex,age,username,password from person where true
             <if test="username!=null"> AND username LIKE #{username}</if>
             <if test="password!=null">AND password LIKE #{password}</if>  

</select>  

2、bind标签

<select id="selectPersons" resultType="person" parameterType="person">
         <bind name="pattern" value="‘%‘ + _parameter.username + ‘%‘" />
              select id,sex,age,username,password from person where username LIKE #{pattern}
</select>

3、CONCAT

where username LIKE concat(concat(‘%‘,#{username}),‘%‘)