Java爬虫https网页内容报错SSLHandshakeException信任（忽略）所有SSL证书

luoye 2021年02月13日编程语言 355 0

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

原因：https出现信任弹出（访问网页时候弹出是否信任）

解决方案：忽略ssl证书

创建一个类忽略ssl证书

TrustSSL.java

import java.io.*; 
import java.net.*; 
import java.security.KeyManagementException; 
import java.security.NoSuchAlgorithmException; 
import java.security.cert.CertificateException; 
import java.security.cert.X509Certificate; 
import javax.net.ssl.*; 
 
public class TrustSSL { 
 
    private static class TrustAnyTrustManager implements X509TrustManager { 
 
        public void checkClientTrusted(X509Certificate[] chain, String authType) 
                throws CertificateException { 
        } 
 
        public void checkServerTrusted(X509Certificate[] chain, String authType) 
                throws CertificateException { 
        } 
 
        public X509Certificate[] getAcceptedIssuers() { 
            return new X509Certificate[] {}; 
        } 
    } 
 
    private static class TrustAnyHostnameVerifier implements HostnameVerifier { 
        public boolean verify(String hostname, SSLSession session) { 
            return true; 
        } 
    } 
    public static InputStream HttpsSSL(URL strUrl){ 
 
        try { 
            SSLContext sc = SSLContext.getInstance("SSL"); 
            sc.init(null, new TrustManager[] { new TrustAnyTrustManager() },new java.security.SecureRandom()); 
            HttpsURLConnection conn = (HttpsURLConnection) strUrl.openConnection(); 
            conn.setSSLSocketFactory(sc.getSocketFactory()); 
            conn.setHostnameVerifier(new TrustAnyHostnameVerifier()); 
            //设置超时间为5秒 
            conn.setConnectTimeout(5 * 1000); 
            //防止屏蔽程序抓取而返回403错误 
            conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); 
            conn.connect(); 
            //获取服务器响应代码 
            int responsecode = conn.getResponseCode(); 
            if (responsecode == 200) { 
                //得到输入流 
                return conn.getInputStream(); 
            } else { 
                System.out.println("获取不到 " + strUrl + " 源码，服务器响应代码为：" + responsecode); 
                return null; 
            } 
        } catch (NoSuchAlgorithmException e) { 
            e.printStackTrace(); 
        } catch (KeyManagementException e) { 
            e.printStackTrace(); 
        }catch (IOException e) { 
            e.printStackTrace(); 
        } 
        return null; 
 
    } 
    public static void main(String[] args) throws Exception { 
        HttpsSSL(new URL("url")); 
    } 
}