java在訪問https資源時的證書信任問題

java程序在訪問https資源時，出現報錯html

sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

這本質上，是java在訪問https資源時的證書信任問題。如何解決這個問題呢？

關於這個問題有一篇博客作了很詳細的解釋，須要理解的能夠查看： http://blog.csdn.net/lizeyang/article/details/18983843

如下是結合我具體狀況的一個小栗子：

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import javax.net.ssl.HostnameVerifier; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLSession; import org.apache.log4j.Logger; import org.htmlparser.util.ParserException; import com.xwtech.parser.GetRequestHtmlParser; import com.xwtech.pojo.ExtendCandidate; /* * GET請求類 */
public class GetRequest { private String url = "https://b2b.10086.cn/b2b/main/viewNoticeContent.html?noticeBean.id="; private Logger logger;
　　 public GetRequest() { logger = Logger.getLogger(GetRequest.class); }
 private static void trustAllHttpsCertificates() throws Exception { javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1]; javax.net.ssl.TrustManager tm = new miTM(); trustAllCerts[0] = tm; javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext.getInstance("SSL"); sc.init(null, trustAllCerts, null); javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory()); } //爲更好的演示，去掉了不相關的代碼
    public void getData(String id) { this.url = url + id; BufferedReader in = null; HttpURLConnection conn = null; String result = ""; try {　　　　　　　　
　　　　　　 //該部分必須在獲取connection前調用
 trustAllHttpsCertificates(); HostnameVerifier hv = new HostnameVerifier() { public boolean verify(String urlHostName, SSLSession session) { logger.info("Warning: URL Host: " + urlHostName + " vs. " + session.getPeerHost()); return true; } }; HttpsURLConnection.setDefaultHostnameVerifier(hv); conn = (HttpURLConnection)new URL(url).openConnection(); // 發送GET請求必須設置以下兩行
            conn.setDoInput(true); conn.setRequestMethod("GET"); // flush輸出流的緩衝
            in = new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { logger.error("發送 GET 請求出現異常！\t請求ID:"+id+"\n"+e.getMessage()+"\n"); } finally {// 使用finally塊來關閉輸出流、輸入流
            try { if (in != null) { in.close(); } } catch (IOException ex) { logger.error("關閉數據流出錯了！\n"+ex.getMessage()+"\n"); } } // 得到相應結果result,能夠直接處理......
 } static class miTM implements javax.net.ssl.TrustManager, javax.net.ssl.X509TrustManager { public java.security.cert.X509Certificate[] getAcceptedIssuers() { return null; }

        public boolean isServerTrusted(java.security.cert.X509Certificate[] certs) { return true; } public boolean isClientTrusted(java.security.cert.X509Certificate[] certs) { return true; } public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType) throws java.security.cert.CertificateException { return; } public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType) throws java.security.cert.CertificateException { return; } } }

與正常get請求相比，多了紅色的部分，不忽略證書信任的代碼能夠參考我另一篇博客：java

　　http://www.cnblogs.com/husky/p/6377577.htmlapache

就是在進行鏈接前須要顯示調用如下進行忽略證書信任：session

trustAllHttpsCertificates();　　　　// 這是一個方法，具體見上面
HttpsURLConnection.setDefaultHostnameVerifier(hv);　　　　　　　　//這裏HttpsURLConnection是類名,hv參數須要本身建立，具體能夠參考上面。

Post請求須要忽略證書信任與這個同樣，在獲取鏈接前，加上以上代碼。ide