sun.security.validator.ValidatorException: PKIX path building failed作者：数据无忧 时间：2020-09-18 13:24:53 |
Java做爬虫处理HTTPS链接时报错sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target这个是因为程序未处理证书才会报这个错误，解决办法只需要信任证书即可。添加下面的工具类： // 信任所有证书 public class TrustCertsUtil { public static void trustAllHttpsCertificates() { // 如果爬虫请求HTTPS网址，必须加入这两行 System.setProperty("jdk.http.auth.proxying.disabledSchemes", ""); System.setProperty("jdk.http.auth.tunneling.disabledSchemes", ""); try { 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("TLS"); sc.init(null, trustAllCerts, null); javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory()); } catch (Exception e) { System.err.println("【DATA5U】设置证书出错，原因：" + e.getMessage()); } } 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; } } } 然后再项目的main方法中加入这行代码即可：TrustCertsUtil.trustAllHttpsCertificates(); 如果项目使用的是HttpClient，上面的方法还不见效，请参考 HttpClient跳过证书的方法
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