MyBatis之foreach标签的用法及多种循环问题

	<!--第一种-->
	<select id="getList" resultType="com.epeit.api.model.Device"> 
	  	SELECT *
	  	FROM devcie 
	 	WHERE 1=1 
	 	 <if test="ids != null and ids.size > 0"> 
	   		AND id IN
	   		<foreach collection="ids" item="item" open="(" separator="," close=")"> 
	   		 #{item} 
	  		 </foreach> 
	  	 </if> 
	 </select>
 
	<!--第二种-->
	<select id="getList" resultType="com.epeit.api.model.Device"> 
	  	SELECT *
	  	FROM devcie 
	  	WHERE 1=1 
	  	<if test="ids != null and ids.size > 0"> 
	   		AND
	   		<foreach collection="ids" item="item" open="id IN(" separator="," close=")"> 
	    		#{item} 
	   		</foreach> 
	  	</if> 
	 </select>
	 
	 <!--如果入参是一个逗号分隔的字符串比如"1,2,3,4"，还可以简化写法，不用转成List,直接以字符串的形式传入即可-->
	<select id="getList" resultType="com.epeit.api.model.Device">
		SELECT *
	  	FROM devcie 
	 	WHERE 1=1 
	 	 <if test="strIds != null and strIds ！= ''"> 
	   		AND id IN
	   		<foreach collection="strIds.split(',')" item="item" open="(" separator="," close=")"> 
	   		 #{item} 
	  		 </foreach> 
	  	 </if>
	</select>

	<!--第一种-->
	<update id="updateList">
		<foreach collection="deviceList" item="item"  separator=";">
		    UPDATE device 
		    SET 
		       name = #{item.name},
		       no = #{item.no}
		    WHERE  
		       id = #{item.id}  
		</foreach>
	</update>

	<!--第二种-->
	<update id="updateList">
		UPDATE device 
		SET 
		   del_flag = 1
		WHERE 1=1
		AND id IN
	    <foreach collection="ids" item="item" open="("  separator="," close=")">
	         #{item}
	    </foreach>
	</update>

	<!--第一种-->
    <insert id="insertList">
        INSERT INTO
       	device
        	(id,name,no)
        VALUES
        <foreach collection="deviceList" item="item" separator=",">
            ( #{item.id}, #{item.name}, #{item.no} )
        </foreach>
    </insert>

	<!--第二种-->
    <insert id="insertList">
    	<foreach collection="deviceList" item="item" separator=";">
        INSERT INTO
       	device
        	(id,name,no)
        VALUES
            ( #{item.id}, #{item.name},#{item.no} )
        </foreach>
    </insert>