不废话，上马。

import java.io.File;import java.io.IOException;import java.io.RandomAccessFile;import java.nio.channels.FileChannel;import java.nio.channels.FileLock;/** * @author DBJ * */public class MyThreadInfoWritor {  private String filename;  /**   *   */  public MyThreadInfoWritor(String fileName) {    this.filename = fileName;  }  public void write(MyThreadInfo tInfo) {    RandomAccessFile out = null;    File file = new File(this.filename);    try {      if (!file.exists()) {        file.createNewFile();        out = new RandomAccessFile(file, "rw");      }      out = new RandomAccessFile(file, "rw");      FileChannel fcout = out.getChannel();      FileLock flout = null;      while (true) {        try {          flout = fcout.lock();          break;        } catch (Exception e) {          System.out.println("其他线程正在操作该文件，当前线程休眠1000毫秒");          try {            Thread.sleep(1000);          } catch (InterruptedException e1) {            e1.printStackTrace();          }        }      }      long fileLength = out.length();       out.seek(fileLength);      out.write(tInfo.toString().getBytes("utf8"));      flout.release();      fcout.close();      out.close();      out = null;    } catch (IOException e) {      file.deleteOnExit();      System.out.println("Exception encountered: " + e);    }  }}