Windows7系统运行hadoop报Failed to locate the winutils binary in the hadoop binary path错误

private static String checkHadoopHome() {
    // first check the Dflag hadoop.home.dir with JVM scope
    String home = System.getProperty("hadoop.home.dir");

    // fall back to the system/user-global env variableif (home == null) {
      home = System.getenv("HADOOP_HOME");
    }
    try {
       // couldn't find either setting for hadoop's home directoryif (home == null) {
         throw new IOException("HADOOP_HOME or hadoop.home.dir are not set.");
       }
       if (home.startsWith("\"") && home.endsWith("\"")) {
         home = home.substring(1, home.length()-1);
       }
       // check that the home setting is actually a directory that exists
       File homedir = new File(home);
       if (!homedir.isAbsolute() || !homedir.exists() || !homedir.isDirectory()) {
         thrownew IOException("Hadoop home directory " + homedir
           + " does not exist, is not a directory, or is not an absolute path.");
       }
       home = homedir.getCanonicalPath();
    } catch (IOException ioe) {
      if (LOG.isDebugEnabled()) {
        LOG.debug("Failed to detect a valid hadoop home directory", ioe);
      }
      home = null;
    }    
    return home;
  }

private static String HADOOP_HOME_DIR = checkHadoopHome();

public static final String getQualifiedBinPath(String executable) 
  throws IOException {
    // construct hadoop bin path to the specified executable
    String fullExeName = HADOOP_HOME_DIR + File.separator + "bin" 
      + File.separator + executable;

    File exeFile = new File(fullExeName);
    if (!exeFile.exists()) {
      throw new IOException("Could not locate executable " + fullExeName
        + " in the Hadoop binaries.");
    }
    return exeFile.getCanonicalPath();
  }

  /** a Windows utility to emulate Unix commands */publicstaticfinal String WINUTILS = getWinUtilsPath();

  public static final String getWinUtilsPath() {
    String winUtilsPath = null;

    try {
      if (WINDOWS) {
        winUtilsPath = getQualifiedBinPath("winutils.exe");
      }
    } catch (IOException ioe) {
       LOG.error("Failed to locate the winutils binary in the hadoop binary path",
         ioe);
    }

    return winUtilsPath;
  }