1、不廢話，上程式碼：

public static void main(String[] args) throws Exception {
		CloseableHttpClient httpClient = HttpClients.createDefault(); // 建立HttpClient例項
		HttpGet httpGet = new HttpGet("http://www.tuicool.com"); // 建立Httpget例項
		//設定Http報文頭資訊
		httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0");
		HttpHost httoHost = new HttpHost("113.2.63.7",8118);//代理Ip
 

		//RequestConfig requestConfig = RequestConfig.custom().setProxy(httoHost).build();
		RequestConfig requestConfig = RequestConfig.custom()
				.setConnectTimeout(10000)//設定連線超時時間
				.setSocketTimeout(10000)//設定讀取超時時間
				.setProxy(httoHost)//設定代理
				.build();
		httpGet.setConfig(requestConfig);
		CloseableHttpResponse response = null;
		response = httpClient.execute(httpGet); // 執行http get請求
		HttpEntity httpEntity = response.getEntity(); // 獲取返回實體
		String web = EntityUtils.toString(httpEntity, "utf-8"); // 解析實體
		System.out.println("網頁內容是：");
		System.out.println(web);
		response.close(); // 關閉response
		httpClient.close(); // 關閉HttpClient實體
}
 

2、關於IP代理

IP代理分為：透明代理、匿名代理、混淆代理、高匿代理

1）透明代理(Transparent Proxy)

REMOTE_ADDR = Proxy IP

HTTP_VIA = Proxy IP

HTTP_X_FORWARDED_FOR = Your IP

透明代理雖然可以直接“隱藏”你的IP地址，但是還是可以從HTTP_X_FORWARDED_FOR來查到你是誰。

2）匿名代理(Anonymous Proxy)

REMOTE_ADDR = proxy IP

HTTP_VIA = proxy IP

HTTP_X_FORWARDED_FOR = proxy IP

匿名代理比透明代理進步了一點：別人只能知道你用了代理，無法知道你是誰。

還有一種比純匿名代理更先進一點的：混淆代理，見下節。

3）混淆代理(Distorting Proxies)

REMOTE_ADDR = Proxy IP

HTTP_VIA = Proxy IP

HTTP_X_FORWARDED_FOR = Random IP address

如上，與匿名代理相同，如果使用了混淆代理，別人還是能知道你在用代理，但是會得到一個假的IP地址，偽裝的更逼真：-）

4）高匿代理(Elite proxy或High Anonymity Proxy)

REMOTE_ADDR = Proxy IP

HTTP_VIA = not determined

HTTP_X_FORWARDED_FOR = not determined

可以看出來，高匿代理讓別人根本無法發現你是在用代理，所以是最好的選擇。