Fiddle监控java程序的http请求

对于普通的 URLConnection  则需要

System.setProperty("http.proxyHost", "127.0.0.1");
System.setProperty("https.proxyHost", "127.0.0.1");
System.setProperty("http.proxyPort", "8888");
System.setProperty("https.proxyPort", "8888");

对于 Apache-HttpClient 

HttpClient client = HttpClientBuilder.create().setProxy( new HttpHost("127.0.0.1", 8888)).build();