springboot实现拦截器之验证登录示例

<dependency>       <groupId>org.apache.commons</groupId>       <artifactId>commons-lang3</artifactId>       <version>3.5</version>     </dependency> 

<dependency>       <groupId>javax.servlet</groupId>       <artifactId>javax.servlet-api</artifactId>       <version>3.1.0</version>     </dependency> 

package com.demo.interceptor;  import java.lang.annotation.*;  /**  * Created by huguoju on 2016/12/30.  * 在类或方法上添加@Auth就验证登录  */ @Target({ElementType.TYPE, ElementType.METHOD}) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface Auth { } 

package com.demo.util;  /**  * Created by huguoju on 2016/12/30.  */ public interface Constants {   int MAX_FILE_UPLOAD_SIZE = 5242880;   String MOBILE_NUMBER_SESSION_KEY = "sessionMobileNumber";   String USER_CODE_SESSION_KEY = "userCode";   String SESSION_KEY = "sessionId"; } 

package com.demo.model;  import lombok.Data;  /**  * Created by huguoju on 2016/12/30.  */ @Data public class SessionData {   private Integer userCode;   private String mobileNumber; } 

package com.demo.interceptor;  import com.demo.model.SessionData; import com.demo.util.RedisUtil; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.web.method.HandlerMethod; import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;  import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.lang.reflect.Method;  import static com.demo.util.Constants.MOBILE_NUMBER_SESSION_KEY; import static com.demo.util.Constants.SESSION_KEY; import static com.demo.util.Constants.USER_CODE_SESSION_KEY;  /**  * Created by huguoju on 2016/12/30.  */ @Component public class LoginInterceptor extends HandlerInterceptorAdapter {   @Autowired   private RedisUtil redisUtils;   private final static String SESSION_KEY_PREFIX = "session:";   public boolean preHandle(HttpServletRequest request,                HttpServletResponse response, Object handler) throws Exception {     if (!handler.getClass().isAssignableFrom(HandlerMethod.class)) {       return true;     }     handlerSession(request);      final HandlerMethod handlerMethod = (HandlerMethod) handler;     final Method method = handlerMethod.getMethod();     final Class<?> clazz = method.getDeclaringClass();     if (clazz.isAnnotationPresent(Auth.class) ||         method.isAnnotationPresent(Auth.class)) {       if(request.getAttribute(USER_CODE_SESSION_KEY) == null){            throw new Exception();                }else{         return true;       }     }      return true;    }   public void handlerSession(HttpServletRequest request) {     String sessionId = request.getHeader(SESSION_KEY);     if(org.apache.commons.lang3.StringUtils.isBlank(sessionId)){       sessionId=(String) request.getSession().getAttribute(SESSION_KEY);     }     if (org.apache.commons.lang3.StringUtils.isNotBlank(sessionId)) {       SessionData model = (SessionData) redisUtils.get(SESSION_KEY_PREFIX+sessionId);       if (model == null) {         return ;       }       request.setAttribute(SESSION_KEY,sessionId);       Integer userCode = model.getUserCode();       if (userCode != null) {         request.setAttribute(USER_CODE_SESSION_KEY, Long.valueOf(userCode));       }       String mobile = model.getMobileNumber();       if (mobile != null) {         request.setAttribute(MOBILE_NUMBER_SESSION_KEY, mobile);       }     }     return ;   } } 

package com.demo.interceptor;  import org.hibernate.validator.HibernateValidator; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.MessageSource; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; import org.springframework.context.support.PropertySourcesPlaceholderConfigurer; import org.springframework.context.support.ReloadableResourceBundleMessageSource; import org.springframework.validation.Validator; import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean; import org.springframework.validation.beanvalidation.MethodValidationPostProcessor; import org.springframework.web.servlet.ViewResolver; import org.springframework.web.servlet.config.annotation.*; import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping; import org.springframework.web.servlet.view.InternalResourceViewResolver;  /**  * Created by huguoju on 2016/12/30.  */ @Configuration @EnableWebMvc @ComponentScan(basePackages = "com.demo.controller") @PropertySource(value = "classpath:application.properties",     ignoreResourceNotFound = true,encoding = "UTF-8") public class MvcConfig extends WebMvcConfigurerAdapter {   private static final Logger logger = LoggerFactory.getLogger(MvcConfig.class);   @Autowired   LoginInterceptor loginInterceptor;    /**     * <p>    *   视图处理器    * </p>    *    * @return    */   @Bean   public ViewResolver viewResolver() {     logger.info("ViewResolver");     InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();     viewResolver.setPrefix("/WEB-INF/jsp/");     viewResolver.setSuffix(".jsp");     return viewResolver;   }    /**    * 拦截器配置    * @param registry    */   @Override   public void addInterceptors(InterceptorRegistry registry) {     // 注册监控拦截器     registry.addInterceptor(loginInterceptor)         .addPathPatterns("/**")      .excludePathPatterns("/configuration/ui");    }    @Override   public void addCorsMappings(CorsRegistry registry) {     registry.addMapping("/**")         .allowedOrigins("*")         .allowedHeaders("*/*")         .allowedMethods("*")         .maxAge(120);   }    /**    * 资源处理器    * @param registry    */   @Override   public void addResourceHandlers(ResourceHandlerRegistry registry) {     logger.info("addResourceHandlers");     registry.addResourceHandler("/swagger-ui.html")         .addResourceLocations("classpath:/META-INF/resources/");     registry.addResourceHandler("/webjars/**")         .addResourceLocations("classpath:/META-INF/resources/webjars/");   }  } 

@Auth @RestController public class TestController {  }