异常整理（1）

网络请求报：
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
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1283)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1258)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)
查阅资料后：

            URL parsedUrl = new URL(url);
            if("https".equalsIgnoreCase(parsedUrl.getProtocol())){  
                SslUtils.ignoreSsl();  
            }  
            HttpURLConnection connection = (HttpURLConnection) parsedUrl.openConnection();

在openConnection前执行SslUtils.ignoreSsl()；
现在贴上SslUtils工具类代码：

import java.security.cert.CertificateException;  
import java.security.cert.X509Certificate;  

import javax.net.ssl.HostnameVerifier;  
import javax.net.ssl.HttpsURLConnection;  
import javax.net.ssl.SSLContext;  
import javax.net.ssl.SSLSession;  
import javax.net.ssl.TrustManager;  
import javax.net.ssl.X509TrustManager; 

public class SslUtils {
    private static void trustAllHttpsCertificates() throws Exception {  
        TrustManager[] trustAllCerts = new TrustManager[1];  
        TrustManager tm = new miTM();  
        trustAllCerts[0] = tm;  
        SSLContext sc = SSLContext.getInstance("SSL");  
        sc.init(null, trustAllCerts, null);  
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());  
    }  

    static class miTM implements TrustManager,X509TrustManager {  
        public X509Certificate[] getAcceptedIssuers() {  
            return null;  
        }  

        public boolean isServerTrusted(X509Certificate[] certs) {  
            return true;  
        }  

        public boolean isClientTrusted(X509Certificate[] certs) {  
            return true;  
        }  

        public void checkServerTrusted(X509Certificate[] certs, String authType)  
                throws CertificateException {  
            return;  
        }  

        public void checkClientTrusted(X509Certificate[] certs, String authType)  
                throws CertificateException {  
            return;  
        }  
    }  

    /** 
     * 忽略HTTPS请求的SSL证书，必须在openConnection之前调用 
     * @throws Exception 
     */  
    public static void ignoreSsl() throws Exception{  
        HostnameVerifier hv = new HostnameVerifier() {  
            public boolean verify(String urlHostName, SSLSession session) {  
                System.out.println("Warning: URL Host: " + urlHostName + " vs. " + session.getPeerHost());  
                return true;  
            }  
        };  
        trustAllHttpsCertificates();  
        HttpsURLConnection.setDefaultHostnameVerifier(hv);  
    }  
}