Forward request to spring controller

问题

From a servlet , I am forwarding the request to a spring controller like below

RequestDispatcher rd = request.getRequestDispatcher("/myController/test?reqParam=value");
rd.forward(request, response);

In order to pass a parameter to the spring controller , I am passing it as request parameter in the forward URL.

Is there a better way of doing this ?

Instead of passing in request parameter , can I pass as a method parameter to the spring controller during forward ?

回答1:

This will be called when /myController/test?reqParam=value is requested:

@RequestMapping("/myController/test")
public String myMethod(@RequestParam("reqParam") String reqParamValue) {
  return "forward:/someOtherUrl?reqParam="+reqParamValue;  //forward request to another controller with the param and value
}

Or you can alternatively do:

@RequestMapping("/myController/test")
public String myMethod(@RequestParam("reqParam") String reqParamValue,
                       HttpServletRequest request) {
  request.setAttribute("reqParam", reqParamValue);
  return "forward:/someOtherUrl"; 
}

回答2:

you can use path variable such as follow without need to use query string parameter:

@RequestMapping(value="/mapping/parameter/{reqParam}", method=RequestMethod.GET)
public @ResponseBody String byParameter(@PathVariable String reqParam) {
    //Perform logic with reqParam
}

来源：https://stackoverflow.com/questions/42465091/forward-request-to-spring-controller