使用代理访问，且获取请求的响应值

//请求获取响应
    public static StringBuffer senGet(String url){
        StringBuffer result=new StringBuffer();
        BufferedReader in =null;
        try {
            URL realUrl = new URL(url);
            // /创建代理服务器
            InetSocketAddress addr = new InetSocketAddress("192.168.11.254", 8080);
            //http代理
            Proxy proxy = new Proxy(Proxy.Type.HTTP, addr); 
            //设置代理访问
            //HttpURLConnection connection1 = (HttpURLConnection) realUrl.openConnection(proxy);// 设置代理访问
            // 打开和URL之间的连接
            HttpURLConnection connection =(HttpURLConnection)realUrl.openConnection(proxy);
            //设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //连接
            connection.connect();
            
            Map<String,List<String>> map = connection.getHeaderFields();
            
            /*for (String key : map.keySet()) {
                System.out.println(key+"---------->"+map.get(key));
            }*/
            
            in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while((line=in.readLine())!=null){
                result.append(line);
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(in!=null){
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        
        return result;
    }