线程错误，高手帮忙，万分感激！！！在线等待。。。。。 -

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线程错误，高手帮忙，万分感激！！！在线等待。。。。。

Java XML SUN .net F#

实现一个定时自动上传文件到FTP的功能，但是线程报错。

TimeTask.java

------------------------------------------------------------

import java.util.TimerTask;

public class TimeTask extends TimerTask {
ftpClient ftpclient = new ftpClient();
@Override
public void run() {
ftpClient.ScanFile();
System.out.println("Start Ftp Task");
}

}
-------------------------------------------------------------

ExecuteTask.java

-------------------------------------------------------------

import java.util.Timer;

public class ExecuteTask {
static Parse parse;
int iTime;
/*
* Execute Task
*/
public void Task() {
  parse = new Parse();
  try {
   parse.viewXML("beanConfig.xml");
   iTime = Integer.parseInt(parse.getSScanTime());
   System.out.println(toString(iTime));
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  Timer timer = new Timer();
  timer.schedule(new TimeTask(), iTime * 1000,iTime * 1000);
}
private char[] toString(int iTime2) {
  // TODO Auto-generated method stub
  return null;
}

}
----------------------------------------------------------------------

FileViewer.java

----------------------------------------------------------------------

import java.io.*;
import java.util.ArrayList;
import java.util.List;

/**
* 讀取目錄及子目錄下指定檔案名的路徑並放到一個陣列裡面返回遍歷
* @author
*
*/
public class FileViewer {
private static List<String> fileList = new ArrayList<String>();

public static List<String> getFileList() {
  return fileList;
}
/**
*
* @param path 檔路徑
* @param suffix 尾碼名
* @param isdepth 是否遍歷子目錄
* @return
*/
public static List<String> getListFiles(String path, String suffix, boolean isdepth)
{
    File file = new File(path);
    return FileViewer.listFile(file ,suffix, isdepth);
}

public static List<String> listFile(File f, String suffix, boolean isdepth)
{
    //是目錄，同時需要遍歷子目錄
    if (f.isDirectory() && isdepth == true)
    {
      File[] t = f.listFiles();
      for (int i = 0; i < t.length; i++)
      {
      listFile(t[i], suffix, isdepth);
      }
    }
    else
    {
     String filePath = f.getAbsolutePath();

     if(!suffix.equals("java") && !suffix.equals("JAVA")){
      return null;
     }
     if(suffix != null)
      {
      //最後一個.(即尾碼名前面的.)的索引
       int begIndex = filePath.lastIndexOf(".");
       String tempsuffix = "";

       if(begIndex != -1)//防止是檔但卻沒有尾碼名結束的檔
       {
       tempsuffix = filePath.substring(begIndex + 1, filePath.length());
       }

       if(tempsuffix.equals(suffix))
       {
       fileList.add(filePath);
       }
      }
      else
      {
      //尾碼名為null則為所有檔
      fileList.add(filePath);
      }

    }
    return fileList;
}

/**
* 刪除指定的檔
* @param fileName 全路徑檔案名
* @param newPath 新路徑
*/
public static void deleteFile(String fileName,String newPath){
  File file = new File(fileName);
  //1.copy filename to success Directory
  //2.delete filename
  if (file.exists()){
   copyFile(fileName,newPath);
   file.delete();
  }
}

/**
    * 複製單個文件
    * @param oldPath String eg. c:/fqf.txt
    * @param newPath String eg. f:/fqf.txt
    * @return boolean
    */
public static void copyFile(String oldPath, String newPath) {
     try {
       int bytesum = 0;
       int byteread = 0;
       File oldfile = new File(oldPath);
       if (oldfile.exists()) { //File Exists
         InputStream inStream = new FileInputStream(oldPath); //Load Old File
         FileOutputStream fs = new FileOutputStream(newPath);
         byte[] buffer = new byte[204800];
         while ( (byteread = inStream.read(buffer)) != -1) {
           bytesum += byteread; //File Size
           //System.out.println(bytesum);
           fs.write(buffer, 0, byteread);
         }
         inStream.close();
       }
     }
     catch (Exception e) {
       System.out.println("Copy File Error");
       e.printStackTrace();

}

/**
     * 方法追加檔：使用FileWriter
     * @param fileName
     * @param content
     */
public static void appendMethod(String fileName, String content)
{
     try
     {
      //打開一個寫檔器，構造函數中的第二個參數true表示以追加形式寫檔
      FileWriter writer = new FileWriter(fileName, true);
      writer.write(content + "\r\n");
      writer.close();
     }
     catch (IOException e)
     {
      e.printStackTrace();
     }
}

}
--------------------------------------------------------------------

ftpConnect.java

--------------------------------------------------------------------

import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

import sun.net.TelnetInputStream;
import sun.net.TelnetOutputStream;
import sun.net.ftp.FtpClient;

public class ftpClient {
static String PATH_SYMBOL = "/";

static String userName = "admin"; //用戶名
static String passWord = "note"; //密碼
static FtpClient ftpClient;
static Parse parse;
static List<String> fileList = new ArrayList<String>();

/**
* FTP
*/
public static void ftpConnect() {
  try {
   ftpClient = new FtpClient(parse.getIpAddress(),Integer.parseInt(parse.getPort()));
   ftpClient.login(parse.getUsername(), parse.getPassword());

System.out.println(ftpClient.welcomeMsg);

   ftpClient.binary();
   String sFile;
   String[] sFileName;
   for (int i = 0; i < fileList.size(); i++) {
    //
    sFile = fileList.get(i);

    sFileName = sFile.split(PATH_SYMBOL);
    TelnetOutputStream ftpOut = ftpClient
      .put(sFileName[sFileName.length - 1]);
    //
    FileInputStream fs = new FileInputStream(sFile);
    TelnetInputStream ftpIn = new TelnetInputStream(fs, true);
    byte[] buf = new byte[204800];
    int bufsize = 0;
    while ((bufsize = ftpIn.read(buf, 0, buf.length)) != -1) {
     ftpOut.write(buf, 0, bufsize);
    }
    ftpIn.close();
    ftpOut.close();
   }
   System.out.println(ftpClient.getResponseString());

  } catch (IOException e) {
   e.printStackTrace();
  }
  ftpClient.sendServer("QUIT\r\n");
}

/**
*
*/
public static void LoadXML() {
  parse = new Parse();
  try {
   parse.viewXML("beanConfig.xml");
   System.out.println("scantime=" + parse.getSScanTime()
     + ",filePath=" + parse.getSfilepath());
  } catch (Exception e) {
   e.printStackTrace();
  }
}

/**
*
*/
public static List<String> LoadFile() {
  // fileViewer = new FileViewer();
        // fileList = FileViewer.getListFiles(parse.getSfilepath(), "txt", true);
  fileList = FileViewer.getListFiles(parse.getSfilepath(), "xls", true);
  // out file
  if (fileList == null) {
   return null;
  }
  for (int i = 0; i < fileList.size(); i++) {
   System.out.println(fileList.get(i));
  }
  return fileList;
}

/**
*
*/
public static void ScanFile() {
  LoadXML();
  if (LoadFile() == null) {
   return;
  }
  ftpConnect();
  String sFile;
  String[] sFileName;
  for (int i = 0; i < fileList.size(); i++) {
   sFile = fileList.get(i);
   sFileName = sFile.split(PATH_SYMBOL);
   FileViewer.deleteFile(fileList.get(i), parse.getSBackupfile()
     + sFileName[sFileName.length - 1]);
  }
  // fileList set clear;
  fileList.clear();
  // print Task End Info
  System.out.println("Task End.");
}

/**
* @param args
*/
public static void main(String[] args) {
  ExecuteTask excuteTask = new ExecuteTask();
  excuteTask.Task();
  // System.out.println(System.getProperty("os.name"));
}

/**
*
* @param pathList
*            String
* @throws Exception
*/
public void buildList(String pathList) throws Exception {
  ftpClient.ascii();
  StringTokenizer s = new StringTokenizer(pathList, "/"); // sign
  // int count = s.countTokens();
  String pathName = "";
  while (s.hasMoreElements()) {
   pathName = pathName + "/" + (String) s.nextElement();
   try {
    ftpClient.sendServer("XMKD " + pathName + "\r\n");
   } catch (Exception e) {
    e = null;
   }
   // int reply = ftpClient.readServerResponse();
  }
  ftpClient.binary();
}

}

--------------------------------------------------------------------

Parse.java

--------------------------------------------------------------------

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Parse {
private Document doc = null;
private String sScanTime;
private String sfilepath;
private String sBackupfile;
private String ipAddress;
private String port;
private String username;
private String password;

public String getIpAddress() {
return ipAddress;
}

public void setIpAddress(String ipAddress) {
this.ipAddress = ipAddress;
}

public String getPort() {
return port;
}

public void setPort(String port) {
this.port = port;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String getSBackupfile() {
return sBackupfile;
}

public void setSBackupfile(String backupfile) {
sBackupfile = backupfile;
}

public String getSScanTime() {
return sScanTime;
}

public void setSScanTime(String scanTime) {
sScanTime = scanTime;
}

public String getSfilepath() {
return sfilepath;
}

public void setSfilepath(String sfilepath) {
this.sfilepath = sfilepath;
}

public void init(String xmlFile) throws Exception {
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  DocumentBuilder db = dbf.newDocumentBuilder();
  doc = db.parse(new File(xmlFile));
}

public void viewXML(String xmlFile) throws Exception {
this.init(xmlFile);
Element element = doc.getDocumentElement();

NodeList nodeList = doc.getElementsByTagName(element.getTagName());

Node fatherNode = nodeList.item(0);

    NodeList childNodes = fatherNode.getChildNodes();
  // System.out.println(childNodes.getLength());
  for (int j = 0; j < childNodes.getLength(); j++) {
   Node childNode = childNodes.item(j);
   if (childNode instanceof Element) {
    if (childNode.getNodeName().equals("scantime")) {
     this.setSScanTime(childNode.getFirstChild().getNodeValue());
    } else if (childNode.getNodeName().equals("filepath")) {
     this.setSfilepath(childNode.getFirstChild().getNodeValue());
    } else if (childNode.getNodeName().equals("backupfile")) {
     this.setSBackupfile(childNode.getFirstChild()
       .getNodeValue());
    } else if (childNode.getNodeName().equals("ipaddress")) {
     this.setIpAddress(childNode.getFirstChild()
       .getNodeValue());
    } else if (childNode.getNodeName().equals("port")) {
     this.setPort(childNode.getFirstChild()
       .getNodeValue());
    } else if (childNode.getNodeName().equals("username")) {
     this.setUsername(childNode.getFirstChild()
       .getNodeValue());
    } else if (childNode.getNodeName().equals("password")) {
      this.setPassword(childNode.getFirstChild()
        .getNodeValue());
    }
   }
  }
}
}

------------------------------------------------------------------------------

beanConfig.xml

------------------------------------------------------------------------------

<?xml version="1.0" encoding="UTF-8"?>
<config>
<scantime>1</scantime>
<filepath>D:</filepath>
<backupfile>/var/ftp/salse/</backupfile>
<ipaddress>192.168.242.130</ipaddress>
<port>21</port>
<username>root</username>
<password>mm520</password>
</config>

------------------------------------------------------------------------------

报错：

java.lang.NullPointerException
at java.io.Writer.write(Writer.java:110)
at java.io.PrintStream.write(PrintStream.java:453)
at java.io.PrintStream.print(PrintStream.java:603)
at java.io.PrintStream.println(PrintStream.java:742)
at ExecuteTask.Task(ExecuteTask.java:14)
at ftpClient.main(ftpClient.java:118)
scantime=1,filePath=D:
Exception in thread "Timer-0" java.lang.NullPointerException
at FileViewer.listFile(FileViewer.java:35)
at FileViewer.listFile(FileViewer.java:37)
at FileViewer.getListFiles(FileViewer.java:26)
at ftpClient.LoadFile(ftpClient.java:79)
at ftpClient.ScanFile(ftpClient.java:95)
at TimeTask.run(TimeTask.java:8)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)