Spring mvc Ambiguous mapping found. Cannot map controller bean method

Question

I am trying to build an app which can list some values from the database and modify, add, delete if necessary using Spring 4 and i receive the following error(only if the \"

Answer 1

For me adding "params" attribute in @RequestMapping worked as shown

  @ResponseBody
  @RequestMapping(method = RequestMethod.GET, params = {"id"})
  public User getUserById(final @RequestParam(name="id", required = true) String Id)
    throws InvalidArgumentException {

    return userService.getUserById(UUID.fromString(Id));
  }

  /**
   * REST service endpoint.
   * @param name Unique name for the user in the system.
   * @return Object of type {@link User} if exists otherwise null.
   */
  @ResponseBody
  @RequestMapping(method = RequestMethod.GET, params = {"name"})
  public User getUserByName(final @RequestParam(name="name", required = true) String name)
    throws InvalidArgumentException {

    return userService.getUserByName(name);
  }

However adding both the parameters at a time in query string will give 500 error with message :

Ambiguous handler methods mapped for HTTP path

In that case you can have another controller method taking both params and but only uses one of them which I feel is not necessary.