java io工具 文件转二进制byte数组

把文件输入流读进 byte数组，返回

package io;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class BinaryFile {
    
    public static byte[] read(File f) throws IOException{
        BufferedInputStream bf = new BufferedInputStream
                                    (new FileInputStream(f));
        //获取文件输入流
        try {
            byte[] data =  new byte[bf.available()];
            //          available()   返回估计读取的字节数
            bf.read(data);
            return data;
        } finally {
            bf.close();
        } 
    }    
    
    
    public static byte[] read(String f) throws IOException{
            return read(new File(f));
            
    }
    
    
    
    

}