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();

        }

    }

}