java - 将自定义参数添加到 spring mvc Controller

Question

我有一个自定义调度程序 servlet，它扩展了默认的 DispatcherServlet 来对所有请求进行一些验证。

由于我将从请求(getInputStream()->Map)获取所有参数来进行一些验证，因此我想将参数传递给 Controller ​​或将参数添加到上下文，以便我可以从 Controller 再次获取它们.

现在我只是将所有参数放入全局 Map，但我想知道是否有一些简单的方法。

public class CustomDispatcherServlet extends DispatcherServlet {

private static final long serialVersionUID = 7250693017796274410L;

@Override
protected void doDispatch(HttpServletRequest request, HttpServletResponse response) throws Exception {

    doFilter(request, response);
    super.doDispatch(request, response);
}
...

private void doFilter(HttpServletRequest request, HttpServletResponse response) {
    WLNResponse<String> error = null;

    try {
        boolean isSignValid = checkSignValidity(request);
        ...

private boolean checkSignValidity(HttpServletRequest request) throws IOException {
      // pass this params to controller or somewhere I can get from controller      
      Map<String, Object> params = WebUtils.readParams(request); 
      ...

Answer 1

我在 Controller 本身中验证参数的方式。例如

@Controller
public ControllerClass
{
  @RequestMapping(value = "/someurl", method = RequestMethod.GET, params = {
    "requestParam"})
  public void someMethod(@RequestParam(value = "requestParam") String requestParam)
  {
    System.out.println("This is the value of the RequestParam requestParam " + requestParam);
  }
}

这样您就可以在 Controller 中进行验证。

唯一无法解决的问题是发出的请求是否未解析到有效的 Controller 。为此，我将使用注释@controllerAdvice。