图片与字符串(base64编码)的转化

package com.demo;
import java.util.*;
import java.io.*;

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

public class ImageTra {
    
    /*
     * 有给定base64编码的字符串，抓化为图片
     * 先经过解码生成字节数据(byte数组存储)
     * 然后IO六输出
     * */
    public static boolean generateImg(String String, String path) throws IOException{
        if (String == null){
            return false;
        }else{
            OutputStream out = new FileOutputStream(path);
            BASE64Decoder decoder = new BASE64Decoder();
            
            byte[] data = decoder.decodeBuffer(String);
            out.write(data);
            out.flush();
            out.close();
            return true;
        }
    }
    
    /*
     * 给定一张图片，经base64编码转化为字符串，
     * */
    public static String ImgToString(String path) throws IOException{
        InputStream inputStream = new FileInputStream(path);
        //根据图片的字节大小定义byte数组
        byte[] data = new byte[inputStream.available()];
        inputStream.read(data);
        inputStream.close();
        // base64加密
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        try {
            //当前路径
//            System.out.println(System.getProperty("user.dir"));
            String string = ImgToString("test.png");
            generateImg(string,"same.png");
            
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
    }

}