java - 如何在 spring mvc 中对特定请求执行过滤器？

Question

<小时/>

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"));
}    
}

<小时/>

下面是资源 我只想对第二个请求执行上述过滤器。

如何做到这一点，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

您可以尝试使用 HandlerInterceptorAdapter 。它通过 url 工作，而不是特定方法，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");
    }
}

另一个解决方案可能是将 Aspect 与 spring-mvc 结合使用，并在方法上设置 PointCut。

希望有帮助。