前端如何把多个对象传值到后端

 点击批量保存之后，把勾选的两条数据传到后端分别去保存

前端vue中的方法

insertSchoolSetBath() {
      const examSchoolSetList = this.$refs['table'].selection
      if (examSchoolSetList.length === 0) {
        this.$alert('请选择要保存的记录',
          '提示',
          {
            confirmButtonText: '确定',
            type: 'warning',
            callback: function() {
            }
          }
        )
        return false
      }
        let SchoolSetList = JSON.stringify(examSchoolSetList);//将对象转换为json字符串
        const loading = this.$loading({
          lock: true,
          text: '正在保存，请稍后...',
          spinner: 'el-icon-loading',
          background: 'rgba(0, 0, 0, 0.7)'
        })
        const formData = new FormData()
        formData.append('SchoolSetList', SchoolSetList)
        insertSchoolSetBath(formData).then(response => {
          loading.close()
          this.$alert('保存成功',
              '提示', {
                confirmButtonText: '确定',
                type: 'success',
                callback: action => {
                  this.onclickChange()
                }
              }
            )
        })
      
    },

后端springboot中

    @PostMapping("insertSchoolSetBath")
    @ApiOperation(value = "插入")
    public ResultJson insertSchoolSetBath(@RequestParam("SchoolSetList") String SchoolSetList){
        User currentUser = userService.getCurrentUser();
        JSONArray picArray = JSONArray.parseArray(SchoolSetList);//这个方法的作用就是将json格式的数据转换成数组格式。
        //遍历得到单个的对象
        for (int i = 0; i < picArray.size(); i++) {
            JSONObject jsonObject = picArray.getJSONObject(i);
            ExamSchoolSet set=new ExamSchoolSet();
            jsonObject.get("examDate");
            List<Date> list2 = jsonObject.getObject("examDate", new TypeReference<List<Date>>(){});
            set.setExamStartTime(list2.get(0));
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(list2.get(1));
            calendar.add(Calendar.DATE, 1);// 当前时间加上一天
            set.setExamEndTime(calendar.getTime());
            set.setPrize1stRatio((String) jsonObject.get("prize1stRatio"));
            set.setPrize2ndRatio((String) jsonObject.get("prize2ndRatio"));
            set.setPrize3rdRatio((String) jsonObject.get("prize3rdRatio"));
            if(jsonObject.get("id")!=null){
                if( examShoolSetService.selectById((Integer)jsonObject.get("id"))!=null){
                    UpdateWrapper<ExamSchoolSet> updateWrapper=new UpdateWrapper<>();
                    updateWrapper.eq("id",(Integer)jsonObject.get("id"));
                    examShoolSetService.update(set,updateWrapper);
                }else{
                    set.setSchoolId(Integer.parseInt(jsonObject.get("departmentId").toString()));
                    set.setCreateTime(new Date());
                    set.setCreateName(currentUser.getId());
                    set.setExamId(Integer.parseInt(jsonObject.get("examId").toString()));
                    examShoolSetService.insert(set);
                }
            }else{
                set.setSchoolId(Integer.parseInt(jsonObject.get("departmentId").toString()));
                set.setCreateTime(new Date());
                set.setCreateName(currentUser.getId());
                set.setExamId(Integer.parseInt(jsonObject.get("examId").toString()));
                examShoolSetService.insert(set);
            }
        }
        return ResultJson.ok();
    }