Spring之拦截器

一、SpringMvc拦截器

springmvc.xml配置

<mvc:interceptors>
  <mvc:interceptor>
   <mvc:mapping path="/**" />
   <bean  class="com.test.interceptor.MyInterceptor">  
   </bean>
  </mvc:interceptor>
 </mvc:interceptors>

拦截器MyInterceptor类代码（统计接口访问次数）

public class MyInterceptor extends HandlerInterceptorAdapter {


   private ThreadLocal<StopWatch> stopWatchLocal = new ThreadLocal<StopWatch>();

@Autowired
protected SystemInterfaceLogService systemInterfaceLogService;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
      StopWatch stopWatch = new StopWatch(handler.toString());
stopWatchLocal.set(stopWatch);
stopWatch.start("stopWatchLocal");
return super.preHandle(request, response, handler);
}

@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
      Long time = 0L;
StopWatch stopWatch = stopWatchLocal.get();
      if (stopWatch != null) {
if (stopWatch.isRunning()) {
            stopWatch.stop();
time = stopWatch.getTotalTimeMillis();
stopWatchLocal.remove();
}
      }
      String currentPath = request.getRequestURI();
String requestType = request.getMethod();
String queryString = "";
      if(requestType.equals("GET")){
         queryString = request.getQueryString();
queryString = queryString == null ? "" : "?" + queryString;
}else{
         BufferedReader br=request.getReader();
         String inputLine = "";
while ((inputLine = br.readLine()) != null) {
            queryString += inputLine;
         }
         br.close();
}
      SystemInterfaceLogDtl data = new SystemInterfaceLogDtl();
data.setUrlId(UUID.randomUUID().toString());
data.setSystemType("test");

      data.setRequestUrlName(currentPath.substring(currentPath.lastIndexOf("/")+1,currentPath.length()));     

      //请求接口路径

data.setRequestUrl(currentPath);

      //请求接口参数

data.setRequeryParm(queryString);

      //请求接口时长(ms)

data.setRequeryTime(time);
String date = DateUtils.convertToTime(new Date());
data.setCreateTime(date);
data.setLastTime(date);
systemInterfaceLogService.insertSystemInterfaceLog(data);
super.afterCompletion(request, response, handler, ex);

}

@Override
public void afterPropertiesSet() throws Exception {

}
}

二、SpringBoot拦截器

添加web过滤器

1、添加web 过滤器，管理过滤的类，以及过滤的请求路径

2、实现WebMvcConfigurer 类,复写父类的方法 addInterceptors

3、通过registry.addInterceptor拦截类，addPathPatterns拦截路径，excludePathPatterns添加允许路径

@Configuration
public class addInterceptor implements WebMvcConfigurer {
@Resource
private MyInterceptor authInterceptor;
/**
     * 自定义资源映射
     *
     * @param registry
*/
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {

    }

/**
     * 拦截页面
     *
     * @param registry
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(authInterceptor).addPathPatterns("/**").excludePathPatterns("/");
}

/**
     * 视图跳转控制器
     * @param registry
*/
@Override
public void addViewControllers(ViewControllerRegistry registry) {

    }

/**
     * 默认静态资源处理器
     * @param configurer
*/
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {

    }

/**
     * 配置视图解析器
     * @param registry
*/
@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
    }

/**
     * 配置内容裁决的一些选项
     * @param configurer
*/
@Override
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {

    }
}

拦截器MyInterceptor类代码（统计接口访问次数）

@Component
public class MyInterceptor extendsHandlerInterceptorAdapter {

private ThreadLocal<StopWatch> stopWatchLocal = new ThreadLocal<StopWatch>();
@Autowired
protected SystemInterfaceLogService systemInterfaceLogService;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
      StopWatch stopWatch = new StopWatch(handler.toString());
stopWatchLocal.set(stopWatch);
stopWatch.start("stopWatchLocal");
      return super.preHandle(request, response, handler);
}

@Override

public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
      Long time = 0L;
StopWatch stopWatch = stopWatchLocal.get();
      if (stopWatch != null) {
if (stopWatch.isRunning()) {
            stopWatch.stop();
time = stopWatch.getTotalTimeMillis();
stopWatchLocal.remove();
}
      }
      String currentPath = request.getRequestURI();
String requestType = request.getMethod();
String queryString = "";
      if(requestType.equals("GET")){
         queryString = request.getQueryString();
queryString = queryString == null ? "" : "?" + queryString;
}else{
         BufferedReader br=request.getReader();
         String inputLine = "";
while ((inputLine = br.readLine()) != null) {
            queryString += inputLine;
         }
         br.close();
}
      SystemInterfaceLogDtl data = new SystemInterfaceLogDtl();
data.setUrlId(UUID.randomUUID().toString());
data.setSystemType("test");

      data.setRequestUrlName(currentPath.substring(currentPath.lastIndexOf("/")+1,currentPath.length()));     

      //请求接口路径

data.setRequestUrl(currentPath);

      //请求接口参数

data.setRequeryParm(queryString);

      //请求接口时长(ms)

data.setRequeryTime(time);
String date = DateUtils.convertToTime(new Date());
data.setCreateTime(date);
data.setLastTime(date);
systemInterfaceLogService.insertSystemInterfaceLog(data);
super.afterCompletion(request, response, handler, ex);

}

@Override
public void afterPropertiesSet() throws Exception {

   }