在實際開發中往往遇到要通過代理IP和PORT才能連線到對方API的方式

在這裡需要給予代理的支援網路之間的訪問；

如果實現：設定代理IP和埠

HttpHost proxy = new HttpHost("10.59.103.237", 8080, "HTTP");
response = httpClient.execute(proxy, httpGet);

以一個httpget為例

public static String httpsGet(String url) {
    	CloseableHttpResponse response = null;
        try {
	        	CloseableHttpClient httpClient = SSLHttpClient.getSSLHttpClient();
			      HttpGet httpGet = new HttpGet(url);
						RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(20000).setConnectionRequestTimeout(20000).setSocketTimeout(20000).build();
						httpGet.setConfig(requestConfig);
						HttpHost proxy = new HttpHost("10.59.103.237", 8080, "HTTP");
						response = httpClient.execute(proxy, httpGet);
						HttpEntity entity = response.getEntity(); // 獲取返回實體
						String returnStr = EntityUtils.toString(entity, "utf-8");
						logger.info("本地介面返回值正常 :" + returnStr);
						return BCConvert.qj2bj(returnStr);
					} catch (Exception e) {
						logger.info("本地介面異常url :" + url);
						return null;
					} finally {
						if (response != null) {
							try {
								EntityUtils.consume(response.getEntity());
							} catch (IOException e) {
								e.printStackTrace();
							}
						}
				}
    }
 

這裡非常依賴於瀏覽器的代理設定；

瀏覽器設定代理後；是否連線到網路要開網路做驗證；

這樣程式碼中的代理才會生效