<a href="/user/all-users?modelMap = ${modelMap}&pageNo=1&pageSize=15&userType=graduateStudent">
//jsp里向CONTROLLER 传值的代码
@RequestMapping("/all-users")
public String userManagement(ModelMap modelMap, String pageNo, String pageSize, String userType)
{
if (pageNo == null)
pageNo = "1";
if (pageSize == null)
pageSize = "15";
if (userType == null)
userType = "graduateStudent";
UserJsonController userJsonController = new UserJsonController();
Page page = null;
if (userType == "graduateStudent")
page = (Page) userJsonController.getPageAllGraduatestudent(pageNo, pageSize);
else page = (Page) userJsonController.getPageAllSupervisor(pageNo, pageSize);
modelMap.addAttribute("page", page);
return "users/user-management";
}
报NULL POINTER EXCEPTION
测试结果是四个参数都接收到了

自顶， 坐等

debug跟踪一下

大哥你挖坟了