Base64编码与解码~~~~~~~~~~~~~~

Question

import java.io.*;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Base64Convert {
    BASE64Decoder decoder = new BASE64Decoder();

    public String ioToBase64() throws IOException {
        String fileName = "d:\\tool\\index.html"; //源文件
        File file = new File(fileName);

        FileInputStream inputFile = new FileInputStream(file);

        byte[] buffer = new byte[(int) file.length()];

        inputFile.read(buffer);

        inputFile.close();

        return new BASE64Encoder().encode(buffer);
    }

    public String base64ToStr() throws IOException {
        String fileName = "d:\\tool\\1.txt"; //源文件
        String strBase64 = null;
        try {
            InputStream in = new FileInputStream(fileName);
            // in.available()返回文件的字节长度
            byte[] bytes = new byte[in.available()];
            // 将文件中的内容读入到数组中
            in.read(bytes);
            strBase64 =  new String(bytes);      //将字节流数组转换为字符串
            in.close();
        } catch (FileNotFoundException fe) {
            fe.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
        return strBase64;
    }

    public void decoderBase64File(String base64Code)throws Exception {
        File file = new File("d:\\tool\\");

        if(file.exists()==false){
            file.mkdirs();

        }

        byte[] buffer = new BASE64Decoder().decodeBuffer(base64Code);

        FileOutputStream out = new FileOutputStream("d:\\tool\\2.7z");

        out.write(buffer);

        out.close();

    }

    public void base64ToIo(String strBase64) throws IOException {
        String string = strBase64;
        String fileName = "d:\\tool\\3.7z"; //生成的新文件
        try {
            // 解码，然后将字节转换为文件
            byte[] bytes = new BASE64Decoder().decodeBuffer(string);   //将字符串转换为byte数组
            ByteArrayInputStream in = new ByteArrayInputStream(bytes);
            byte[] buffer = new byte[1024];
            FileOutputStream out = new FileOutputStream(fileName);
            int bytesum = 0;
            int byteread = 0;
            while ((byteread = in.read(buffer)) != -1) {
                bytesum += byteread;
                out.write(buffer, 0, byteread); //文件写操作
            }
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

    public static void main(String[] args) throws Exception {
        Base64Convert convert = new Base64Convert();
        System.out.println(convert.base64ToStr());
        System.out.println(convert.ioToBase64().length());

//        if(convert.ioToBase64().equals(convert.base64ToStr())){
//           System.out.println(convert.ioToBase64());
//           convert.base64ToIo(convert.base64ToStr());
//        }
        
    }

}