File与byte[]，Object互转

import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.jfree.util.Log;

/**
 * Object 对象必须是可序列化对象 。 可序列化的 Object 对象都可以转换为一个磁盘文件；反过来则不一定成立，只有序列化文件才可以转换为
 * Object 对象。
 * 
 * @author fdc
 * 
 */
public class FileByteConvert {

	public static byte[] fileToByteConvert(File imgFile) {

		FileInputStream fis = null;
		byte[] pData = new byte[(int) imgFile.length()];

		try {
			fis = new FileInputStream(imgFile);
			fis.read(pData);
		} catch (FileNotFoundException e) {
			Log.info("文件没找到！" + e.getMessage());
		} catch (IOException e) {
			Log.info("读取文件出错！" + e.getMessage());
		} finally {
			if (fis != null) {
				try {
					fis.close();
				} catch (IOException e) {
					Log.info("关闭文件输入流出错！" + e.getMessage());
				}
			}
		}

		return pData;
	}

	public static File byteToFileConvert(byte[] byteArr, String outputFile) {
		BufferedOutputStream stream = null;
		File file = null;

		try {
			file = new File(outputFile);
			FileOutputStream fstream = new FileOutputStream(file);
			stream = new BufferedOutputStream(fstream);
			stream.write(byteArr);
		} catch (Exception e) {
			Log.info("输出文件出错！" + e.getMessage());
		} finally {
			if (stream != null) {
				try {
					stream.close();
				} catch (IOException e) {
					Log.info("关闭文件输出流出错！" + e.getMessage());
				}
			}
		}

		return file;
	}

	public static Object byteToObjectConvert(byte[] objBytes) throws Exception {

		if (objBytes == null || objBytes.length == 0) {
			return null;
		}

		ByteArrayInputStream bi = new ByteArrayInputStream(objBytes);
		ObjectInputStream oi = new ObjectInputStream(bi);

		return oi.readObject();
	}

	public static byte[] objectToBytesConvert(Serializable obj) throws Exception {

		if (obj == null) {
			return null;
		}

		ByteArrayOutputStream bo = new ByteArrayOutputStream();
		ObjectOutputStream oo = new ObjectOutputStream(bo);
		oo.writeObject(obj);

		return bo.toByteArray();
	}
}