mybatis mysql delete in操作只能删除第一条数据的方法

<!-- 批量删除-->  <delete id="deleteByIds" parameterType="int[]">     <![CDATA[    DELETE FROM p_customer    WHERE customerId in    ]]>    <foreach collection="array" item="arr" index="no" open="("      separator="," close=")">      #{arr}    </foreach>  </delete>

/**   * 删除和批量删除   */  @RequestMapping(value = "/del", method = RequestMethod.POST, produces = { MediaType.APPLICATION_JSON_VALUE })  public ResponseEntity<PCustomerVo> delete(@RequestParam String customerId) throws Exception {    //获取批量删除的id，去掉最后一个“，”    customerId=customerId.substring(0,customerId.length()-1);    String[] strarr=customerId.split(",");    int[] arr=new int[strarr.length];    for(int i=0;i<strarr.length;i++){      arr[i]=Integer.parseInt(strarr[i]);    }    pcustomerService.deletes(arr);    return new ResponseEntity<>(HttpStatus.OK);  }