fileheader.java

利用霍夫曼树实现文本压缩。如果是文本可以压缩到40％的大小

package org.galaxy_OPEN.www.datastructures.huffman;

import java.io.*;

public class FileHeader implements Serializable {
	private String originalFileName;

	private long numBytes;

	private Node huffmanTree;

	public FileHeader(String name, long nbBytes, Node huffTree) {
		originalFileName = name;
		numBytes = nbBytes;
		this.huffmanTree = huffTree;
	}

	public String getOriginalFileName() {
		return originalFileName;
	}

	public long getNumBytes() {
		return numBytes;
	}

	public Node getHuffmanTree() {
		return huffmanTree;
	}

	public long headerLength() throws FileNotFoundException, IOException {
		long size = -1;

		File temp = File.createTempFile("header", ".tmp");
		ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(
				temp));
		oos.writeObject(this);
		oos.flush();
		oos.close();
		size = temp.length();
		temp.delete();
		return size;
	}
}