Exception in thread "main" java.io.FileNotFoundException: hdfs:\192.168.73.16:8020\user\9003547\text.txt (檔名、目錄名或卷標語法不正確。)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:146)
    at org.chinaskin.hadoop.FileCopy.main(FileCopy.java:29)

在win上使用Myeclipse連結hadoop時出現如上錯誤，注意看列印的錯誤資訊，傳入的是 hdfs://192.xxxx,變成了hdfs:\192xxxxx，將傳入的兩個引數打印出來發現並無異常並且檔案在hdfs上是存在的。
程式碼如下：

import java.io.InputStream;
import java.io.OutputStream;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;

public
 
 class aa {
    public static void main(String[] args) throws Exception {
        Configuration conf = new Configuration();
        FileSystem fs = FileSystem.get(URI.create(args[1]), conf);
        InputStream in = new BufferedInputStream(new FileInputStream(args[0]));
        OutputStream out = fs.create(new
 
 Path(args[1]));
        IOUtils.copyBytes(in, out, 4096, true);
    }
}

public class aa {
        static  {// 靜態塊，設定hdfs協議
            URL. setURLStreamHandlerFactory ( new  FsUrlStreamHandlerFactory());
    }
    public static void main(String[] args) throws Exception {
        Configuration conf = new Configuration();
        URL url = new URL(args[0]);
        InputStream in = url.openStream();//引入相應的包使用url讀取資料
        FileSystem fs = FileSystem.get(URI.create(args[1]), conf);
        OutputStream out = fs.create(new Path(args[1]));
        IOUtils.copyBytes(in, out, 4096, true);
    }
}

另一種解決方法，其實找不到檔名的錯誤是因為，在將一個檔案讀取轉換為位元組流的時候，沒有經過hadoop 的FileSystem，即
```java
InputStream in = new BufferedInputStream(new FileInputStream(args[0]));
```

修改為InputStream in = new BufferedInputStream(fs.open(new Path(args[0])));
讀取hdfs的檔案使用 fs.open(enw Path(args[0]))