在wind7中运行启动hadoop出现错误 java.lang.UnsatisfiedLinkError

在wind7中运行启动hadoop出现错误：

2017-06-23 20:10:08,526 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
2017-06-23 20:10:19,325 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(1009)) - session.id is deprecated. Instead, use dfs.metrics.session-id
2017-06-23 20:10:19,331 INFO [main] jvm.JvmMetrics (JvmMetrics.java:init(76)) - Initializing JVM Metrics with processName=JobTracker, sessionId=
2017-06-23 20:10:20,279 WARN [main] mapreduce.JobSubmitter (JobSubmitter.java:copyAndConfigureFiles(150)) - Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
2017-06-23 20:10:20,320 WARN [main] mapreduce.JobSubmitter (JobSubmitter.java:copyAndConfigureFiles(259)) - No job jar file set. User classes may not be found. See Job or Job#setJar(String).
2017-06-23 20:10:20,521 INFO [main] input.FileInputFormat (FileInputFormat.java:listStatus(280)) - Total input paths to process : 2
2017-06-23 20:10:20,773 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:submitJobInternal(396)) - number of splits:2
2017-06-23 20:10:21,061 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:printTokens(479)) - Submitting tokens for job: job_local1013203469_0001
2017-06-23 20:10:21,236 WARN [main] conf.Configuration (Configuration.java:loadProperty(2358)) - file:/tmp/hadoop-Administrator/mapred/staging/Administrator1013203469/.staging/job_local1013203469_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.retry.interval; Ignoring.
2017-06-23 20:10:21,244 WARN [main] conf.Configuration (Configuration.java:loadProperty(2358)) - file:/tmp/hadoop-Administrator/mapred/staging/Administrator1013203469/.staging/job_local1013203469_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.attempts; Ignoring.
2017-06-23 20:10:21,367 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:submitJobInternal(441)) - Cleaning up the staging area file:/tmp/hadoop-Administrator/mapred/staging/Administrator1013203469/.staging/job_local1013203469_0001
Exception in thread "main" java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:570)
at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:977)
at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:173)
at org.apache.hadoop.util.DiskChecker.checkDirAccess(DiskChecker.java:160)
at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:94)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:285)
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:344)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:115)
at org.apache.hadoop.mapred.LocalDistributedCacheManager.setup(LocalDistributedCacheManager.java:131)
at org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:163)
at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:731)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:432)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1556)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
at com.imoocteacher.WordCountRunner.main(WordCountRunner.java:64)

出现这个错误是windows没有hadoop.dll这个文件，下载hadoop.dll放到C:\Windows\System32中，就可以了

参考：http://www.bkjia.com/ASPjc/931209.html