Question

我使用下面的代码

  new URL("https://google.com").openConnection();

代码在JDK 7中运行良好，但是当我使用JDK 8

时会抛出异常，如下所示

 Exception in thread "Goole" java.lang.AssertionError: Default directory is not an absolute path
    at sun.nio.fs.WindowsFileSystem.<init>(WindowsFileSystem.java:61)
    at sun.nio.fs.WindowsFileSystemProvider.<init>(WindowsFileSystemProvider.java:53)

我不明白打开SSL连接和文件系统之间的关系。所以我很困惑。任何线索？

Answer 1

一些研究表明，如果将user.dir设置为相对路径，则抛出所提到的异常。所以我将user.dir值更改为绝对路径，它解决了问题。这是完整的堆栈，以满足好奇心：

 Exception in thread "Goole" java.lang.AssertionError: Default directory is not an absolute path
at sun.nio.fs.WindowsFileSystem.<init>(WindowsFileSystem.java:61)
at sun.nio.fs.WindowsFileSystemProvider.<init>(WindowsFileSystemProvider.java:53)
at sun.nio.fs.DefaultFileSystemProvider.create(DefaultFileSystemProvider.java:36)
at java.nio.file.FileSystems$DefaultFileSystemHolder.getDefaultProvider(FileSystems.java:108)
at java.nio.file.FileSystems$DefaultFileSystemHolder.access$000(FileSystems.java:89)
at java.nio.file.FileSystems$DefaultFileSystemHolder$1.run(FileSystems.java:98)
at java.nio.file.FileSystems$DefaultFileSystemHolder$1.run(FileSystems.java:96)
at java.security.AccessController.doPrivileged(Native Method)
at java.nio.file.FileSystems$DefaultFileSystemHolder.defaultFileSystem(FileSystems.java:96)
at java.nio.file.FileSystems$DefaultFileSystemHolder.<clinit>(FileSystems.java:90)
at java.nio.file.FileSystems.getDefault(FileSystems.java:176)
at java.io.File.toPath(File.java:2234)
at sun.security.provider.SeedGenerator$1.run(SeedGenerator.java:190)
at sun.security.provider.SeedGenerator$1.run(SeedGenerator.java:168)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.provider.SeedGenerator.getSystemEntropy(SeedGenerator.java:168)
at sun.security.provider.SecureRandom$SeederHolder.<clinit>(SecureRandom.java:190)
at sun.security.provider.SecureRandom.engineNextBytes(SecureRandom.java:210)
at java.security.SecureRandom.nextBytes(SecureRandom.java:457)
at java.security.SecureRandom.next(SecureRandom.java:480)
at java.util.Random.nextInt(Random.java:329)
at sun.security.ssl.SSLContextImpl.engineInit(SSLContextImpl.java:114)
at sun.security.ssl.SSLContextImpl$DefaultSSLContext.<init>(SSLContextImpl.java:675)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at java.lang.Class.newInstance(Class.java:433)
at java.security.Provider$Service.newInstance(Provider.java:1593)
at sun.security.jca.GetInstance.getInstance(GetInstance.java:236)
at sun.security.jca.GetInstance.getInstance(GetInstance.java:164)
at javax.net.ssl.SSLContext.getInstance(SSLContext.java:156)
at javax.net.ssl.SSLContext.getDefault(SSLContext.java:96)
at javax.net.ssl.SSLSocketFactory.getDefault(SSLSocketFactory.java:122)
at javax.net.ssl.HttpsURLConnection.getDefaultSSLSocketFactory(HttpsURLConnection.java:332)
at javax.net.ssl.HttpsURLConnection.<init>(HttpsURLConnection.java:289)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.<init>(HttpsURLConnectionImpl.java:85)
at sun.net.www.protocol.https.Handler.openConnection(Handler.java:62)
at sun.net.www.protocol.https.Handler.openConnection(Handler.java:57)
at java.net.URL.openConnection(URL.java:972)

ssl地址的URL打开连接会引发断言异常

1 个答案: