https证书校验出现异常该如何解决？https证书（即SSL证书）校验是一个正常的流程，因为只有校验通过才会起到安全保障的作用。通常会对域名、证书链、证书是否过期等进行校验，如果出现异常应该怎么解决呢？以下就举例说明。
如果https证书校验过程中出现“unable to find valid certification path to requested target”这种报错，解决方法如下：
1）导入证书到本地证书库
2）信任所有https证书
最好的解决办法或许是信任所有https证书，因为某些时候不能每次都手动的导入证书非常麻烦。现在封装了个方法，在连接openConnection的时候忽略掉证书就行了。
SslUtils.java
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);
}
}
SslTest.java:
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import org.apache.commons.io.IOUtils;
public class SslTest {
public String getRequest(String url,int timeOut) throws Exception{
URL u = new URL(url);
if(“https”.equalsIgnoreCase(u.getProtocol())){
SslUtils.ignoreSsl();
}
URLConnection conn = u.openConnection();
conn.setConnectTimeout(timeOut);
conn.setReadTimeout(timeOut);
return IOUtils.toString(conn.getInputStream());
}
public String postRequest(String urlAddress,String args,int timeOut) throws Exception{
URL url = new URL(urlAddress);
if(“https”.equalsIgnoreCase(url.getProtocol())){
SslUtils.ignoreSsl();
}
URLConnection u = url.openConnection();
u.setDoInput(true);
u.setDoOutput(true);
u.setConnectTimeout(timeOut);
u.setReadTimeout(timeOut);
OutputStreamWriter osw = new OutputStreamWriter(u.getOutputStream(), “UTF-8”);
osw.write(args);
osw.flush();
osw.close();
u.getOutputStream();
return IOUtils.toString(u.getInputStream());
}
public static void main(String[] args) {
try {
SslTest st = new SslTest();
String a = st.getRequest(“https://xxx.com/login.action”, 3000);
System.out.println(a);
} catch (Exception e) {
e.printStackTrace();
}
}
}
https证书校验出现报错异常就可以按照以上方法来解决。
