Mybatis 模糊查询

参数中直接加入%%

　　  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(cancat('%',#{username}),'%')