我试图使用twitter4j库为我的java项目获得推文,它在封面下使用java.net.HttpURLConnection(可以在堆栈跟踪中看到)。在我第一次运行时,我得到了一个关于证书sun.security.validator.ValidatorException和sun.security.provider.certpath.SunCertPathBuilderException的错误。然后我添加了twitter证书:

C:\Program Files\Java\jdk1.7.0_45\jre\lib\security>keytool -importcert -trustcacerts -file PathToCert -alias ca_alias -keystore "C:\Program Files\Java\jdk1.7.0_45\jre\lib\security\cacerts"

但是没有成功。以下是获取推文的流程:

public static void main(String[] args) throws TwitterException {
    ConfigurationBuilder cb = new ConfigurationBuilder();
    cb.setDebugEnabled(true)
        .setOAuthConsumerKey("myConsumerKey")
        .setOAuthConsumerSecret("myConsumerSecret")
        .setOAuthAccessToken("myAccessToken")
        .setOAuthAccessTokenSecret("myAccessTokenSecret");
    
    TwitterFactory tf = new TwitterFactory(cb.build());
    Twitter twitter = tf.getInstance();
    
    try {
        Query query = new Query("iphone");
        QueryResult result;
        result = twitter.search(query);
        System.out.println("Total amount of tweets: " + result.getTweets().size());
        List<Status> tweets = result.getTweets();
        
        for (Status tweet : tweets) {
            System.out.println("@" + tweet.getUser().getScreenName() + " : " + tweet.getText());
        }
    } catch (TwitterException te) {
        te.printStackTrace();
        System.out.println("Failed to search tweets: " + te.getMessage());
    }

这里是错误:

sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Relevant discussions can be found on the Internet at:
    http://www.google.co.jp/search?q=d35baff5 or
    http://www.google.co.jp/search?q=1446302e
TwitterException{exceptionCode=[d35baff5-1446302e 43208640-747fd158 43208640-747fd158 43208640-747fd158], statusCode=-1, message=null, code=-1, retryAfter=-1, rateLimitStatus=null, version=3.0.5}
    at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:177)
    at twitter4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:61)
    at twitter4j.internal.http.HttpClientWrapper.get(HttpClientWrapper.java:81)
    at twitter4j.TwitterImpl.get(TwitterImpl.java:1929)
    at twitter4j.TwitterImpl.search(TwitterImpl.java:306)
    at jku.cc.servlets.TweetsAnalyzer.main(TweetsAnalyzer.java:38)
Caused by: 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(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
    at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
    at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
    at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
    at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
    at sun.security.ssl.Handshaker.processLoop(Unknown Source)
    at sun.security.ssl.Handshaker.process_record(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
    at twitter4j.internal.http.HttpResponseImpl.<init>(HttpResponseImpl.java:34)
    at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:141)
    ... 5 more
Caused by: 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.validator.PKIXValidator.doBuild(Unknown Source)
    at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
    at sun.security.validator.Validator.validate(Unknown Source)
    at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
    ... 20 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
    at java.security.cert.CertPathBuilder.build(Unknown Source)
    ... 26 more
Failed to search tweets: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

当前回答

对我来说,证书错误弹出是因为我有fiddler运行在后台,这打乱了证书。它作为一个代理如此接近,并重新启动eclipse。

其他回答

如果你的主机位于防火墙/代理之后,在cmd中使用以下命令:

keytool -J-Dhttps.proxyHost=<proxy_hostname> -J-Dhttps.proxyPort=<proxy_port> -printcert -rfc -sslserver <remote_host_name:remote_ssl_port>

将<proxy_hostname>和<proxy_port>替换为已配置的HTTP代理服务器。将<remote_host_name:remote_ssl_port>替换为一个存在认证问题的远程主机(基本上是url)和端口。

将上次打印的证书内容复印一份(同时复印开始证书和结束证书)。将其粘贴到文本文件中,并将扩展名为.crt。现在使用java keytool命令将该证书导入cacerts,它应该可以工作。

keytool -importcert -file <filename>.crt -alias randomaliasname -keystore %JAVA_HOME%/jre/lib/security/cacerts -storepass changeit

I solved this issue on Windows Server 2016 with Java 8, by importing cert from pkcs12 store to cacerts keystore. Path to pkcs12 store: C:\Apps\pkcs12.pfx Path to Java cacerts: C:\Program Files\Java\jre1.8.0_151\lib\security\cacerts Path to keytool: C:\Program Files\Java\jre1.8.0_151\bin After possitioning to folder with keytool in command prompt (as administrator), command to import cert from pkcs12 to cacerts is as follows: keytool -v -importkeystore -srckeystore C:\Apps\pkcs12.pfx -srcstoretype PKCS12 -destkeystore "C:\Program Files\Java\jre1.8.0_151\lib\security\cacerts" -deststoretype JKS You will be prompted to: 1. enter destination keystore password (cacerts pasword, default is "changeit") 2. enter source keystore password (pkcs12 password)

要使更改生效,请重新启动服务器机器(或只需重新启动JVM)。

尝试复制java cacerts:

cp /usr/lib/jvm/java - 1.8.0 openjdk 1.8.0.172 b11.fc28——9.。除x86_64 / jre / lib /安全/ $ JAVA_HOME / jre / lib /安全/除

在浏览器中进入URL:

点击HTTPS证书链(URL地址旁边的锁图标)。点击“更多信息”>“安全”>“显示证书“>”详细信息“>”导出。拾取名称并选择文件类型example.cer chrome -点击网站图标左侧地址栏,选择“证书”->“详细信息”->“导出”并保存为“Der-encoded binary, single Certificate”格式。

现在您有了带有密钥存储库的文件,并且必须将其添加到JVM中。确定cacerts文件的位置,例如。 C:\Program Files (x86)\Java\ jre1.6.0_22\lib\security\cacerts。 接下来导入示例。在命令行中将Cer文件转换为cacerts(可能需要管理员命令提示符):

"C:\Program Files (x86)\Java\jre1.6.0_22\lib\security\cacerts" -file example.cer

您将被要求输入密码,默认为changeit

重新启动JVM/PC。

来源: http://magicmonster.com/kb/prg/java/ssl/pkix_path_building_failed.html

在这里,这种异常通常发生在受信任证书的PATH不匹配时。检查用于安全通信的服务器证书所需的配置或路径。