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http,https 請求配置代理的常見方式

常用的java 發送http請求的方式有兩種

1、通過HttpsURLConnection  自己去發送請求

2、 用spring架構提供的 RestTemplate (import org.springframework.web.client.RestTemplate;) 對象發送請求 

第一種方式配置代理伺服器關鍵代碼:

int PROXY_PORT = 80;//  改成你自己的代理伺服器端口
			String PROXY_HOST = "127.0.0.1";// 改成你自己的代理伺服器ip位址
            System.setProperty("https.proxyHost", PROXY_HOST);  
			System.setProperty("https.proxyPort", PROXY_PORT);
           

改代碼塊放置到通路請求之前即可。

第二種方式配置代理伺服器:

RestTemplate restTemplate1 = new RestTemplate();
            String url = "www.baidu.com";
			String xmlParam = "xxx";
			int PROXY_PORT = 80;// 代理伺服器端口
			String PROXY_HOST = "127.0.0.1";
			Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(PROXY_HOST, PROXY_PORT));
			SimpleClientHttpRequestFactory httpRequestFactory = new SimpleClientHttpRequestFactory();
			httpRequestFactory.setProxy(proxy);
			restTemplate1.setRequestFactory(httpRequestFactory);
            // 發起請求
			String strXML = restTemplate1.postForObject(url, xmlParam, String.class);
           

下面例子用來發起https請求 配置代理服務

/**
	 * 發送https請求
	 * @param requestUrl 請求位址
	 * @param requestMethod 請求方式(GET、POST)
	 * @param outputStr 送出的資料
	 * @return 傳回伺服器響應的資訊
	 */
	public  String httpsRequest(String requestUrl, String requestMethod, String outputStr) {
		try { 
			String PROXY_PORT = "80";// 代理伺服器端口
            String PROXY_HOST = "127.0.0.1";// 改成你自己的代理伺服器ip位址
		    System.setProperty("https.proxyHost", PROXY_HOST);  
			System.setProperty("https.proxyPort", PROXY_PORT);
			 
			// 建立SSLContext對象,并使用我們指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 從上述SSLContext對象中得到SSLSocketFactory對象
			SSLSocketFactory ssf = sslContext.getSocketFactory();
			URL url = new URL(requestUrl);
			HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
			conn.setSSLSocketFactory(ssf);
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setUseCaches(false);
			// 設定請求方式(GET/POST)
			conn.setRequestMethod(requestMethod);
			conn.setRequestProperty("content-type", "application/x-www-form-urlencoded"); 
			// 當outputStr不為null時向輸出流寫資料
			if (null != outputStr) {
				OutputStream outputStream = conn.getOutputStream();
				// 注意編碼格式
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}
			// 從輸入流讀取傳回内容
			InputStream inputStream = conn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
			String str = null;
			StringBuffer buffer = new StringBuffer();
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			// 釋放資源
			bufferedReader.close();
			inputStreamReader.close();
			inputStream.close();
			inputStream = null;
			conn.disconnect();
			return buffer.toString();
		} catch (ConnectException ce) {
			log.error("連接配接逾時:{}", ce);
		} catch (Exception e) {
			log.error("https請求異常:{}", e);
		}
		return null;
	}
           
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.X509TrustManager;

/**
 * 信任管理器
 *
 * Title: MyX509TrustManager
 *
 * Description: 
 *
 * @author 
 *
 * @date 2020年11月18日
 *
 */
public class MyX509TrustManager implements X509TrustManager {

	// 檢查用戶端證書
	public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
	}

	// 檢查伺服器端證書
	public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
	}

	// 傳回受信任的X509證書數組
	public X509Certificate[] getAcceptedIssuers() {
		return null;
	}
}