Question

I am new to Spring MVC, I have a controller displaying a single user detail or all the users as a list

  // without passing any parameter the app should display all users 
  @RequestMapping("/user")
  public String listUsers(Model m) {
    List<User> users = userService.getUsers();
    m.addAttribute(users);
    return "userlist";
  }

  //same url but with userId parameter, the app displays a single user  detail 
  @RequestMapping("/user")
  public String userDetail(@RequestParam("userId") String userId, Model m)
      throws IOException {
    User user = userService.getUserById(userId);
    m.addAttribute(user);
    return "user_detail";
  }

in fact I got a error "spring ambiguous mapping", my mapping syntax is definitely wrong, my question is my desired functionality can be achieved in Spring or not.

Answer 1

我想说将列表请求指定为

是正确的

@RequestMapping("/user")

和特定用户请求

@RequestMapping("/user/{userId}")

将userId作为路径参数传递。

Answer 2

您可以更正第二种方法，例如

@RequestMapping(value={"/user/{userId}"})
  public String userDetail(@PathVariable String userId, Model m)
      throws IOException {
    User user = userService.getUserById(userId);
    m.addAttribute(user);
    return "user_detail";
  }

spring MVC ambiguous mapping error

2 个答案: