mybatis模糊查询写法

Mybatis模糊查询写法（我推荐第一种和第二种）

1.${...} 代替 #{...}  SELECT * FROM tableName WHERE name LIKE '%${text}%';

2.  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>

3.  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>

4. CONCAT

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