如何在spring mvc中对特定请求执行过滤器？答案

【问题标题】：How to execute a filter on specific request in spring mvc?如何在spring mvc中对特定请求执行过滤器？
【发布时间】：2018-04-07 19:46:09
【问题描述】：

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"));
}    
}

以下是资源我只想对第二个请求执行上述过滤器。

如何实现，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);
}

}

【问题讨论】：

标签： java spring spring-mvc jakarta-ee spring-boot

【解决方案1】：

您可以尝试使用HandlerInterceptorAdapter。它通过 url 而不是特定的方法工作，所以它不是你想要的，但它应该可以工作：

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注册：

public class SpringMvcContextConfig extends WebMvcConfigurerAdapter {

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

另一种解决方案是使用带有 spring-mvc 的 Aspect 并在方法上设置 PointCut。

希望对您有所帮助。

【讨论】：