Google drive api Java Quickstart for Google Sheets API崩溃，出现；PKIX路径生成失败”；

在Google Sheets API中运行示例时，会在我的默认Web浏览器（Chrome）中打开一个网页，请求获得许可。此时，控制台输出为

2016-10-03 15:55:25.797:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
2016-10-03 15:55:25.797:INFO::jetty-6.1.26
2016-10-03 15:55:25.809:INFO::Started SocketConnector@localhost:56854
Please open the following address in your browser:
  https://accounts.google.com/o/oauth2/auth?access_type=offline&client_id=1034043219121-gbc9p8gksiu5tn22ush3k6i3h6s4imvj.apps.googleusercontent.com&redirect_uri=http://localhost:56854/Callback&response_type=code&scope=https://www.googleapis.com/auth/spreadsheets.readonly
Attempting to open that address in the default browser now...

2016-10-03 15:55:32.653:INFO::Stopped SocketConnector@localhost:56854
Exception in thread "main" 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)
        at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:77)
        at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:981)
        at com.google.api.client.auth.oauth2.TokenRequest.executeUnparsed(TokenRequest.java:283)
        at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.execute(GoogleAuthorizationCodeTokenRequest.java:158)
        at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.execute(GoogleAuthorizationCodeTokenRequest.java:79)
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.authorize(AuthorizationCodeInstalledApp.java:82)
        at SheetsQuickstart.authorize(SheetsQuickstart.java:73)
        at SheetsQuickstart.getSheetsService(SheetsQuickstart.java:86)
        at SheetsQuickstart.main(SheetsQuickstart.java:103)
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(PKIXValidator.java:387)
        at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
        at sun.security.validator.Validator.validate(Validator.java:260)
        at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)
        ... 21 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
        at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
        ... 27 more

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':run'.
> Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

单击网页上的“允许”按钮后，将显示另一个网页，其内容为“收到验证码。您现在可以关闭此窗口…”。在这一点上，程序崩溃，控制台输出的其余部分停止

2016-10-03 15:55:25.797:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
2016-10-03 15:55:25.797:INFO::jetty-6.1.26
2016-10-03 15:55:25.809:INFO::Started SocketConnector@localhost:56854
Please open the following address in your browser:
  https://accounts.google.com/o/oauth2/auth?access_type=offline&client_id=1034043219121-gbc9p8gksiu5tn22ush3k6i3h6s4imvj.apps.googleusercontent.com&redirect_uri=http://localhost:56854/Callback&response_type=code&scope=https://www.googleapis.com/auth/spreadsheets.readonly
Attempting to open that address in the default browser now...

2016-10-03 15:55:32.653:INFO::Stopped SocketConnector@localhost:56854
Exception in thread "main" 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)
        at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:77)
        at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:981)
        at com.google.api.client.auth.oauth2.TokenRequest.executeUnparsed(TokenRequest.java:283)
        at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.execute(GoogleAuthorizationCodeTokenRequest.java:158)
        at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.execute(GoogleAuthorizationCodeTokenRequest.java:79)
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.authorize(AuthorizationCodeInstalledApp.java:82)
        at SheetsQuickstart.authorize(SheetsQuickstart.java:73)
        at SheetsQuickstart.getSheetsService(SheetsQuickstart.java:86)
        at SheetsQuickstart.main(SheetsQuickstart.java:103)
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(PKIXValidator.java:387)
        at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
        at sun.security.validator.Validator.validate(Validator.java:260)
        at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)
        ... 21 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
        at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
        ... 27 more

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':run'.
> Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

---

我不是网络程序员。可能有一些基本设置未在？

中描述。就我的搜索而言，遇到的错误是由于缺少证书造成的，该证书应添加到位于

%JAVA\u HOME%\lib\security\cacerts

的JVM密钥库文件中

为了解决这个问题，我认为@SimonSez在这篇文章中给出的这个简单易懂的技巧将非常有帮助。如上所述：

首先，您可以通过运行以下命令检查您的证书是否已经在密钥库中：

keytool-list-keystore”%JAVA\u HOME%/jre/lib/security/cacerts“

（您不需要提供密码）

如果您的证书丢失，您可以通过浏览器下载并使用以下命令将其添加到密钥库来获取证书：

---

keytool-import-noprompt-trustcacerts-alias.
我的电脑正在运行Sophos杀毒软件。我在另一台没有Sophos的电脑上尝试了这个例子，效果很好。这个问题可能是由Sophos引起的