@DeleteMapping("/del/batch")
    public Boolean removeUserBatch(@RequestBody List<Integer> ids){
        System.out.println("@@@@@@@@@@@@@@");
        System.out.println(ids);
        return  userService.removeByIds(ids);
    }

 // 批量发送delete请求
    deleteBatch(){
      let ids = this.multipleSelection.map(v => v.id)
      console.log(ids)
      request.delete("/user/del/batch" ,{data:ids})
    .then(res => {
      this.$message.success("删除成功")
      this.load()
      console.log(res)
    })
    .catch(err => {
      this.$message.error("删除失败")
      console.error(err); 
    })
    },

要用{data:ids}