hadoop与eclipse，

hadoop与eclipse，

1）运行一个新项目要先run on  hadoop

在合并hadoop的文件为一个时，一直不出结果，调试时在查看listStutus出现：

org.eclipse.debug.core.DebugException: com.sun.jdi.ClassNotLoadedException: Type has not been loaded occurred while retrieving component type of array.

一直就不行，显示文件数为0；

改写成测试版本为：

import java.io.IOException;
import java.net.URI;
import javax.print.DocFlavor.URL;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
public class MergeHexFpAndmolIndex {
    public static void main(String[] args) throws IOException {           
        Configuration conf = new Configuration();
        //FileSystem hdfs = FileSystem.get(URI.create(arg0) conf);       
        String outHexFpName = "target/";
        Path outHexFpPath = new Path(outHexFpName);
        FileSystem fs = FileSystem.get(conf);
        FileStatus[] stats = fs.listStatus(new Path(outHexFpName));

        for(int i = 0; i < stats.length; ++i) {
            if (stats[i].isDir()){
                  // regular file
                System.out.println(stats[i].getPath().toString()+"dir");
            }
            else {
                 System.out.println(stats[i].getPath().toString()+"haha-file");
            }
       }
       fs.close();
   }
}

运行结果为：file:/home/mjiang/java/eclipse/target-hadoop/mergeHexFpMolIndex/target/hexFpdir

在eclispe选择：

run on  hadoop 后

结果为hdfs://localhost:9000/user/mjiang/target/sdfdir
hdfs://localhost:9000/user/mjiang/target/tmpdir

就 OK了。伤不起阿。各种尝试