文件在使用FileChannel.map后不能被删除(Windows上)

 同事发现在Windows上使用FileChannel的map方法之后, 不能够删除掉文件. 我在Linux上试了一下, 发现没这个问题。 做个笔记, 记录一下.

import java.io.File;
import java.io.RandomAccessFile;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;

import sun.nio.ch.FileChannelImpl;

public class TestDeleteMappedFile {

public static void main(String args[]) {
File f = new File("mapfile");
RandomAccessFile aFile = null;
FileChannel inChannel = null;
try {
aFile = new RandomAccessFile(f, "rw");
inChannel = aFile.getChannel();
ByteBuffer buf = inChannel.map(MapMode.READ_WRITE, 0L, 4);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
inChannel.close();
aFile.close();
} catch (Exception e) {
e.printStackTrace();
}
}
System.out.println("delete " + f + " : " + f.delete());
}
}

import java.io.File;
import java.io.RandomAccessFile;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;
 
import sun.nio.ch.FileChannelImpl;
 
public class TestDeleteMappedFile {

  public static void main(String args[]) {
    File f = new File("mapfile");
    RandomAccessFile aFile = null;
    FileChannel inChannel = null;
    try {
      aFile = new RandomAccessFile(f, "rw");
      inChannel = aFile.getChannel();
      ByteBuffer buf = inChannel.map(MapMode.READ_WRITE, 0L, 4);
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      try {
        inChannel.close();
        aFile.close();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    System.out.println("delete " + f + " : " + f.delete());
  }
}