如何在Spring mvc中对特定请求执行过滤器

Question

---

下面是过滤器。

@Component
public class TestFilter extends GenericFilterBean {
@Override
public void doFilter(
  ServletRequest request, 
  ServletResponse response,
  FilterChain chain) throws IOException, ServletException {
    chain.doFilter(request, response);
    HttpServletRequest httpRequest = (HttpServletRequest) request;
    System.out.println("token is: "+httpRequest.getHeader("token"));
}    
}

---

以下是资源我只想为第二个请求执行上述过滤器。

怎么能做到，请帮忙。

@RestController
public class UserResourceImpl implements UserResource {
private final UserDao userDao;
private final AuthenticationService authenticationService;
@Autowired
public UserResourceImpl(final UserDao userDao,final AuthenticationService authenticationService) {
this.userDao = userDao; 
this.authenticationService = authenticationService;
}
@Override
@RequestMapping(method = RequestMethod.POST, value = "/api/user", produces = "application/json")
public ResponseEntity<?> create(final User user) {
    userDao.save(user);
    return new ResponseEntity<>("", HttpStatus.OK);
}
@Override
@RequestMapping(method = RequestMethod.GET, value = "/api/user", produces = "application/json")
public ResponseEntity<?> getUsers(final User user) {

enter code here
    // how to execute the above filter for this request only ?
    return new ResponseEntity<>("", HttpStatus.OK);
}
}

Answer 1

你可以尝试使用 HandlerInterceptorAdapter。它通过 url 而不是特定方法工作，所以它不完全是你想要的，但它应该工作：

public class MyInterceptor extends HandlerInterceptorAdapter {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //To work with a specific method on the url
        if(request.getMethod().equals("GET")){
            //Do stuff
        }
        return super.preHandle(request, response, handler);
    } 
    //There is also a postHandle and postCompletion method that can be override     
}

并在WebMvcConfigurerAdapter中注册它：

public class SpringMvcContextConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/yourUrl");
    }
}

另一种解决方案可能是将Aspect与spring-mvc一起使用，并在该方法上设置PointCut。

希望它有帮助。