FileUtil.java

package com.eoeandorid.reader;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class FileUtil {
	 
	/**
     * 读二进制文件
	 * @throws IOException 
     */
    public static byte[] readFileByBytes(String fileName) throws IOException {
        File file = new File(fileName);
        InputStream in = null;
        ByteArrayOutputStream bos = null;
        byte [] buffer;
        try {
            in = new FileInputStream(file);
    		bos=new ByteArrayOutputStream();
    		byte[] buf = new byte[10240*4]; //40k
    		int len = 0;
    		while ((len = in.read(buf)) > 0) {
    			bos.write(buf, 0, len);
    		}
    		buffer=bos.toByteArray();	
        } catch (IOException e) {
            throw e;
        }finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e1) {
                }
            }
            if (bos != null) {
                try {
                    bos.close();
                } catch (IOException e1) {
                }
            }
        }
        return buffer;
    }
    
}