java 对同一个文件的同时读写

来源：互联网发布：销售人员定位软件编辑：程序博客网时间：2024/05/01 22:37

/////对文件的写操作

public class fileRW {

/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
  // TODO Auto-generated method stub

  new ThreadWrite().start();
//  new ThreadRead().start();

//  RandomAccessFile rf = new RandomAccessFile("e:/huang.dat", "rw");
//  rf.seek(rf.length());
////  byte[] buffer = {'a','a','a','a','a'};
//  byte[] buffer = {1,2,3,4,5};
//  rf.write(buffer);
//  rf.writeByte('\n');
//
//  rf.close();
//------------------------------------------------------------------
//  FileReader filereader= new FileReader("e:/huang.dat");
//  BufferedReader bufferedReader=new BufferedReader(filereader);
//  String str="";
//  while((str = bufferedReader.readLine())!=null){
//   byte[] buff = str.getBytes();
//   for(int i=0; i<buff.length;i++){
//    System.out.print(buff[i]);
//   }
//   System.out.println();
//  }
}
}

class ThreadWrite extends Thread{

public ThreadWrite(){}
@Override
public void run() {
  // TODO Auto-generated method stub
  super.run();
  RandomAccessFile rf;
  try {
   rf = new RandomAccessFile("e:/huang.dat", "rw");
   rf.seek(rf.length());
   byte[] buffer = {0,0,0,0,0};

   for(int i=0; i< 10000;i++){
    buffer[0] = (byte) i;
    rf.write(buffer);
    rf.writeByte('\n');
    Thread.sleep(200);
   }
   rf.close();
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (InterruptedException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

}

}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

对文件的读操作

public class fileRWread {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new ThreadRead().start();
}

}

class ThreadRead extends Thread{
public ThreadRead(){}
@Override
public void run() {
  // TODO Auto-generated method stub
  super.run();
  FileReader filereader;
  try {
   filereader = new FileReader("e:/huang.dat");
   BufferedReader bufferedReader=new BufferedReader(filereader);
   String str="";
   while((str = bufferedReader.readLine())!=null){
    try {
     Thread.sleep(500);
    } catch (InterruptedException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
    byte[] buff = str.getBytes();
    for(int i=0; i<buff.length;i++){
     System.out.print(buff[i]);
    }
    System.out.println();
   }

  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }


}

}

//////////////////////////////////////////////这个俩个线程，一起运行时候，读写文件的操作，是可行的，不相互干扰的。