Java 多线程写文件

原创
2015/11/01 19:33
阅读数 1.3K

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);
    }
  }
}

 

展开阅读全文
打赏
0
14 收藏
分享
加载中
更多评论
打赏
0 评论
14 收藏
0
分享
返回顶部
顶部