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

如果您仍然得到这个错误

Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid 
certification path to requested target

执行以下命令并重新启动Java进程后

keytool -import -alias certificatealias -keystore C:\Program Files\Java\jre1.8.0_151\lib\security\cacerts -file certificate.cer

然后JDK有一些问题。尝试从可信的提供者安装JDK。 一旦您从可信的提供商重新安装它,就不会遇到这个问题。

其他回答

当java应用程序试图与另一个应用程序/站点通信时,如果您在linux容器中看到此问题,这是因为证书已错误地导入到负载均衡器中。导入证书需要遵循一系列步骤,如果操作不正确,您将看到如下问题

Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid 
certification path to requested target

一旦正确地导入了证书,就应该这样做。不需要修补任何JDK证书。

如果你使用的是ubuntu/linux系统,在终端运行下面的命令。

cd /usr/local/share/ca-certificates

Cp /文件位置/----。crt。(拷贝CRT文件到/usr/local/share/ca-certificates)

sudo update-ca-certificates

这不是twitter特有的答案,但这是在搜索此错误时出现的问题。如果您的系统在连接到一个在web浏览器中查看时似乎具有有效证书的网站时接收到此错误,这可能意味着该网站具有不完整的证书链。

简单总结一下这个问题:证书颁发机构不会使用他们的根证书对任何旧证书进行签名。相反,它们(通常)签署也设置了证书颁发机构标志的中间证书(也就是说,允许签署证书)。然后,当您从CA购买证书时,他们将使用这些中间证书之一签署您的CSR。

您的Java信任存储区很可能只有根证书,而没有中间证书。

错误配置的站点可能只返回已签名的证书。问题:该站点使用的中间证书不在您的信任存储区中。浏览器将通过下载或使用缓存的中间证书来处理这个问题;这最大限度地提高了网站的兼容性。然而,Java和像OpenSSL这样的工具不会。这会导致问题中的错误。

您可以通过使用Qualys SSL测试来验证这种怀疑。如果你在网站上搜索,上面写着

此服务器的证书链不完整。

那就证实了这一点。您还可以通过查看认证路径并查看文本Extra Download来了解这一点。

How to fix it: the server administrator needs to configure the web server to return the intermediate certificates as well. For Comodo, for example, this is where the .ca-bundle file comes in handy. For example, in an Apache configuration with mod_ssl, you'd use the SSLCertificateChainFile configuration setting. For nginx, you need to concatenate the intermediate certificates and the signed certificate and use that in the SSL cert configuration. You can find more by searching for "incomplete certificate chain" online.

我也遇到过同样的问题,使用以下简单的步骤来解决它:

1)从谷歌下载InstallCert.java

2)使用javac InstallCert.java编译

3)运行InstallCert.java,带主机名和https端口,要求输入时按“1”。它将添加“localhost”作为受信任的密钥存储库,并生成名为“jssecacerts”的文件,如下所示:

java InstallCert localhost:443

4)拷贝jssecacerts到$JAVA_HOME/jre/lib/security文件夹

解决这个问题的主要方法是:

https://ankurjain26.blogspot.in/2017/11/javaxnetsslsslhandshakeexception.html

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)。