java.lang.UnsatisfiedlinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode0(Ljava/lang/String;I)V
java.lang.UnsatisfiedlinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode0(Ljava/lang/String;I)V at org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode0(Native Method) at org.apache.hadoop.io.nativeio.NativeIO$Windows.createDirectoryWithMode(NativeIO.java:703) at org.apache.hadoop.fs.RawLocalFileSystem.mkoneDirWithMode(RawLocalFileSystem.java:509) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:562) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:534) at org.apache.hadoop.fs.ChecksumFileSystem.mkdirs(ChecksumFileSystem.java:698) at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:456) at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:443) at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1118) at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1098) at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:987) at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:414) at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:387) at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:337) at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2434) at com.pcz.hdfs.HdfsDemo.testGet(HdfsDemo.java:85) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.frameworkMethod$1.runReflectiveCall(frameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.frameworkMethod.invokeExplosively(frameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)3.解决方案：
- 1.确保本地安装hadoop，我使用的版本是3.1.4，hadoop路径是P:Hadoophadoop-3.1.4。配置环境变量HADOOP_HOME=P:Hadoophadoop-3.1.4
- 2.下载winutils.exe，hadoop.dll，并放在hadoop-3.1.4中的bin目录下，并将bin目录下的hadoop.dll文件拷贝到C:WindowsSystem32下
- 3.如果UnsatisfiedlinkErro还存在，你需要在idea的debug/run配置 vm options 中添加-Djava.library.path=“P:Hadoophadoop-3.1.4”（改成自己的hadoop路径）
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