[Ljava.lang.Object;]: No default constructor found

Question

• Servlet.service() for servlet [springmvc] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate **[[Ljava.lang.Object;]: No default constructor found; **nested exception is java.lang.NoSuchMethodException: [Ljava.lang.Object;.()] with root cause
  java.lang.NoSuchMethodException: [Ljava.lang.Object;.()

  我在做一个网站开发，我希望在Cotroller层中传入Object类型的可变参数，就一直报这个错误，请问该怎么解决呢？以下是我的代码：

  //可变参数做查询
      //localhost/detailsss/?detail=徐国权&detail=12
      @RequestMapping("/detailsss/")
      public String queryDetails(Model model,Object...detail){
  
          try {
              Object consume = null;
              List<Object> list = new ArrayList<>();
              for(Object obj : detail){   
                  if(obj instanceof String){                  
                      consume = new String(((String) obj).getBytes("iso-8859-1"),"utf-8");
                  }
                  else if(obj instanceof Integer){
                      consume = (int)obj;
                  }
                  else if(obj instanceof Date){
                      consume = (Date)obj;
                  }
                  else if(obj instanceof Time){
                      consume = (Time)obj;
                  }else{
                      consume = obj;
                  }
                  list.add(consume);
              }
              //调用service的方法
              List<Detailed> details = comsumeService.queryDetails(list);
              model.addAttribute("details",details);
              return "comsume_info";
          } catch (Exception e) {
              e.printStackTrace();
              return "err";
          }       
      }

  


Answer 1

Object类不能直接实例化，直接用string类型呗，跟object不是一样嘛

Answer 2

debug看看其他层哪里有问题，这里贴上的代码应该没问题