Mybatis mysql delete in operation can only delete the first data method

<!-- Batch Delete -->
  <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>

/**
   * Delete and bulk delete */
  @RequestMapping(value = "/del", method = RequestMethod.POST, produces = { MediaType.APPLICATION_JSON_VALUE })
  public ResponseEntity<PCustomerVo> delete(@RequestParam String customerId) throws Exception {
    //Get the IDs for batch deletion and remove the last ","
    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(str[i]);
    }
    pcustomerService.deletes(arr);
    return new ResponseEntity<>(HttpStatus.OK);
  }