Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'userController' method

在使用SpringMVC的時候遇到了這個問題

 

 

問題緣由:  在指定方法所對應的url地址的時候重複了, 也就是@RequestMapping("url")中, 兩個方法使用了同一個url路徑

 

  //獲取請求參數
    @RequestMapping(value = "/login") public String login(@RequestParam(name = "username", required = true, defaultValue = "admin") String username) { System.out.println(username); return "login"; } //使用JSON從前端獲取數據
    @RequestMapping(value = "/login") public String login(@RequestBody User user) { System.out.println(user.getUserName()); System.out.println(user.getUserGender()); return "/user/user.jsp"; }

 

解決辦法: 將重複的名字換成另一個

    //獲取請求參數
        @RequestMapping(value = "/login2") public String login(@RequestParam(name = "username", required = true, defaultValue = "admin") String username) { System.out.println(username); return "login"; } //使用JSON從前端獲取數據
        @RequestMapping(value = "/login3") public String login(@RequestBody User user) { System.out.println(user.getUserName()); System.out.println(user.getUserGender()); return "/user/user.jsp"; }

 

到這裏,  Ambiguous(有歧義的) mapping(映射). Cannot map 'userController' method 的問題就解決了!