Mybatis使用IN语句查询的实现

select * from HealthCoupon where useType in ( '4' , '3' )

  Map<String, Object> selectByUserId(@Param("useType") String useType)
 
  <select id="selectByUserId" resultMap="BaseResultMap" parameterType="java.lang.String">
 select * from HealthCoupon where useType in (#{useType,jdbcType=VARCHAR})
  </select>

List<User> selectByIdSet(List idList);
 
<select id="selectByIdSet" resultMap="BaseResultMap">
 SELECT
 <include refid="Base_Column_List" />
 from t_user
 WHERE id IN
 <foreach collection="list" item="id" index="index" open="(" close=")" separator=",">
  #{id}
 </foreach>
</select>

List<User> selectByIdSet(String[] idList);
 
<select id="selectByIdSet" resultMap="BaseResultMap">
 SELECT
 <include refid="Base_Column_List" />
 from t_user
 WHERE id IN
 <foreach collection="array" item="id" index="index" open="(" close=")" separator=",">
  #{id}
 </foreach>
</select>

List<User> selectByIdSet(@Param("name")String name, @Param("ids")String[] idList);
 
<select id="selectByIdSet" resultMap="BaseResultMap">
 SELECT
 <include refid="Base_Column_List" />
 from t_user
 WHERE name=#{name,jdbcType=VARCHAR} and id IN
 <foreach collection="idList" item="id" index="index"
  open="(" close=")" separator=",">
  #{id}
 </foreach>
</select>

Map<String, Object> params = new HashMap<String, Object>(2);
params.put("name", name);
params.put("idList", ids);
mapper.selectByIdSet(params);
 
<select id="selectByIdSet" resultMap="BaseResultMap"> 
   select 
   <include refid="Base_Column_List" /> 
   from t_user where 
   name = #{name}
   and ID in 
   <foreach item="item" index="index" collection="idList" open="(" separator="," close=")"> 
   #{item} 
   </foreach> 
</select>