java文件转换成字节

import .*;

/**
 * 读取文件生成字节码

 */
public class FileUtils {

    public static byte[] toByteArray(InputStream inputStream) throws IOException {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int n = 0;
        while (-1 != (n = (buffer))){
            (buffer,0,n);
        }
        return ();
    }




    public static void fileToBytes(byte[] bytes, String filePath, String fileName) throws IOException {
        File file = new File(filePath + fileName);
        //路径前面的文件夹不存在则会创建文件夹
        if (!().exists()) {
            ().mkdirs();
        }
        try (
                FileOutputStream fos = new FileOutputStream(file);
                BufferedOutputStream bos = new BufferedOutputStream(fos)) {
            (bytes);
        }
    }

    public static void main(String[] args) throws IOException {
        File  file = new File("/Users/ha/code/test/target/classes/s/");
        try(
                InputStream inputStream = new FileInputStream(file);
        ){
            byte[] bytes = toByteArray(inputStream);
            fileToBytes(bytes,"/Users/ha/code/test/testtarget/classes/","");
        }

    }
}