<update id="batchUpdate" parameterType="String">
 update cbp_order 
   set status=1
   where id in
  <foreach item="id" collection="array" open="(" separator="," close=")">
  #{id}
  </foreach>
</update>
---参数说明---

<update id="batchUpdate" parameterType="java.util.List"> 
  <foreach collection="list" item="item" index="index" open="" close="" separator=";"> 
   update test  
      <set> 
      test=#{item.test}+1 
      </set> 
      where id = #{item.id} 
  </foreach> 
</update> 

<update id="updateBatch" parameterType="java.util.List">
    update mydata_table
    <trim prefix="set" suffixOverrides=",">
      <trim prefix="status =case" suffix="end,">
         <foreach collection="list" item="item" index="index">
           <if test="item.status !=null and item.status != -1">
             when id=#{item.id} then #{item.status}
           </if>
           <if test="item.status == null or item.status == -1">
             when id=#{item.id} then mydata_table.status//原数据
           </if>
         </foreach>
      </trim>
    </trim>
    where id in
    <foreach collection="list" index="index" item="item" separator="," open="(" close=")">
      #{item.id,jdbcType=BIGINT}
    </foreach>
 </update>
----<trim>属性说明-------