okhttp应用拦截器

public class MyLogInterceptor implements Interceptor {    public Response intercept(Chain chain) throws IOException {        Request request = chain.request();        long t1 = System.nanoTime();        System.out.println(String.format("发送请求: [%s] %s%n%s",                request.url(), chain.connection(), request.headers()));        Response response = chain.proceed(request);        long t2 = System.nanoTime();        System.out.println(String.format("接收响应: [%s] %.1fms%n%s",                response.request().url(), (t2 - t1) / 1e6d, response.headers()));        return response;    }}