请求分派后未调用 Spring 拦截器

Question

我有这个带有preHandle 和afterCompletion 方法的spring 拦截器：

@Slf4j
public class MyInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        String identificationDemande = "";
        try {
            identificationDemande = new ObjectMapper().readTree(request.getInputStream()).path("test").asText();
        } catch (IOException e) {
            log.error("JSON format unvalid", e);
            return true;
        }

        if (StringUtils.equals(identificationDemande, "1")) {
            log.info("preHandle Test without forward");
            return true;
        }

        RequestDispatcher dispatcher = request.getRequestDispatcher("newUrl");
        dispatcher.forward(request, response);
        return false;
    }

    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex) {
        log.info("after completion test");
    }

}

当identificationDemande==1 和我的webservice 调用没有被转发，那么aftercompletion 方法被触发。但是当identificationDemande!=1 和dispatcher.forward(request, response) 被调用时，aftercompletion 不会被触发......我知道这个接缝是合乎逻辑的，但无论如何我可以在完成后拦截这些转发的调用吗？

Answer 1

• 您已经在preHandle 中知道dispatcher.forward(request, response) 何时返回。所以你可以这样做

      try {
         dispatcher.forward(request, response);
         //response is complete now
      }
      finally {
        //your logic
      }
      return false;