get attribute方法中的Spring获取错误

Question

        public ModelAndView inserData(@ModelAttribute    SavingBeansavingBean,HttpServletRequestrs,Model m) {


 System.out.println(savingBean.getFirstName());





 if (savingBean != null)
  System.out.println("abho");
 SavingBean saving =  persionalService.insertData(savingBean);

 custid = saving.getCustomerId();
System.out.println(custid);
m.addAttribute("customId",saving);


 System.out.println(saving.getDisgnProf());

 List<SavingBean> list = new ArrayList<SavingBean>();
 list.add(saving);

 return new ModelAndView("AccountInfo","list", list);

 SavingBean b = new SavingBean();

System.out.println("saas" +  b.getCustomerId());
session = rs.getSession();


System.out.println("xxx" + rs.getAttribute("customId"));
accbean.setCustid((Long) rs.getAttribute("customId"));
 AccountBean accbean1 = persionalService.insertacc(accbean);

 return new ModelAndView("welcome");
         }

Answer 1

从第一次查看代码时，我注意到没有指定request方法。在这种情况下（当使用@modelAttribute时），您必须将其作为(POST)请求。

@RequestMapping(value = "/insert", method = RequestMethod.POST)
@RequestMapping(value = "/accinsert" , method = RequestMethod.POST)

为什么？因为实际上您的对象将由于表单提交而被检索，而表单提交被视为POST请求。试试那玩意儿，看看结果。如果问题仍然存在，那么可能在负责提交数据的表示层（例如JSP页面）中存在一些真正的问题。

祝你好运！