Cannot deserialize instance of `[]`

Caused by: : Cannot deserialize instance of [] out of VALUE_STRING token
at [Source: (PushbackInputStream); line: 1, column: 1]

这种情况兄弟们。我认为前端接受的是数组。

前台：js;

vm.inspectionTas.inspectionTasksPersons="1101,1102"
 var res =vm.inspectionTask.inspectionTasksPersons;
                console.log(res);
              var resa =new Array();//数组
               resa = res.split(",");//将字符串变成字符串数组
                var pIds3 = JSON.stringify(resa);//放进去。后端就可以接受了。
                $.ajax({
                    type: "POST",
                    url: baseURL + "people/liable/infoPid",
                    contentType: "application/json",
                    data: pIds3,
                    success: function (r) {
                        console.log("16151615"+r.toString());
                        vm.listPeople = r;
                    }
                });

            后台：

//查询指定的id人员

 @RequestMapping(value = "/infoPid")
    public List<PeopleLiableEntity> infoPid(@RequestBody Long[] ids){
        List<PeopleLiableEntity> peopleLiableEntityList=new ArrayList<PeopleLiableEntity>();
        try{
       peopleLiableEntityList = peopleLiableService.selectByIds(ids);}catch ( Exception e){
            e.printStackTrace();;
        }
        System.out.println("1615+2020708");
        return peopleLiableEntityList;
    }