一、spring boot项目,使用@Configuration注入WebMvcConfigurer来实现拦截器

如:

@Configuration

public class HighersoftWebMvcConfig implements WebMvcConfigurer{

@Autowired

private AdminHandlerInterceptorAdapter adminHandlerInterceptorAdapter;

@Override

public void addInterceptors(InterceptorRegistry registry) {

registry.addInterceptor(adminHandlerInterceptorAdapter).addPathPatterns("/**");

//.excludePathPatterns("/swagger-resources/**", "/webjars/**");

}

}注意，spring boot项目Configuration才会生效。

拦截器的实现:

@Component

public class AdminHandlerInterceptorAdapter extends HandlerInterceptorAdapter {

@Autowired

private AdminService userService;

@Override

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

if (handler instanceof HandlerMethod) {

final HandlerMethod handlerMethod = (HandlerMethod) handler;

final Class> clazz = handlerMethod.getBeanType();

final Method method = handlerMethod.getMethod();

if (clazz.isAnnotationPresent(ExcludeLoginVerify.class) || method.isAnnotationPresent(ExcludeLoginVerify.class)) {

return true;

}

if(!loginContextVerification(request)) {

throw new RuntimeException("亲,登录了才能操作呢。");

}

return true;

}

return true;

}

}二、如果不是spring boot,用的是spring mvc,那么也可用上面的拦截器。用以下xml来实现:

三、用spring的aop也可以实现:

如:

@Component

public class LoginContextAspect {

private static final Logger logger = LoggerFactory.getLogger(LoginContextAspect.class);

@Autowired

UserService userService;

@Autowired

CookieUtils cookieUtils;

@Pointcut("execution(* net.highersoft.xx.controller..*(..)) && && !@annotation(net.highersoft.xx.annotation.ExcludeLoginVerify)")

public void controllerMethodPointcut() {

}

/**

* 拦截器具体实现

*

* @param pjp

* @return JsonResult(被拦截方法的执行结果，或需要登录的错误提示。)

*/

@Around("controllerMethodPointcut()")

public Object Interceptor(ProceedingJoinPoint pjp) {

Object result = null;

Object[] args = pjp.getArgs();

for (Object arg : args) {

if (arg instanceof HttpServletRequest) {

HttpServletRequest request = (HttpServletRequest) arg;

//验证逻辑

if (!loginContextVerification(request)) {

result = new JsonResult(ResultCode.LOGINCONTEXT_ERROR, "登录状态验证错误,请重新登录!", null);

}

}

}

try {

if (result == null) {

// 一切正常的情况下，继续执行被拦截的方法

result = pjp.proceed();

}

} catch (Throwable e) {

logger.info("LoginContextAspect >> exception: ", e);

result = new JsonResult(ResultCode.ERROR, ResultMsg.ERROR);

}

return result;

}

private boolean loginContextVerification(HttpServletRequest request) {

String token = cookieUtils.getCookieValue(request, "token");

if (!StringUtils.isNullOrEmpty(token)) {

try {

Object user = userService.get(token);

if (user != null) {

UserInfo u = JSONObject.parseObject(user.toString(), UserInfo.class);

return true;

}

} catch (JedisException ex) {

logger.error(ex.getMessage());

}

}

return false;

}

}四、用javax.servlet.Filter也可以实现，老项目可能用的是这个。

如在web.xml加入:

urlFilter

net.highersoft.mstats.filter.UrlFilter

urlFilter

/*

那么url-pattern下的访问都要过Filter,这样也可以控制权限。

五，其它方式

shiro 可以控制得更细，但代码也多些。

struts 也可以配置拦截器，但很久没用了，没代码了。