Java base64 圖片編碼轉換

package com.test;

import org.junit.Test;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;

/**
 *BASE64
 */
public class Base64Test {

    @Test
    public void baseTest(){
        //加密
        String basestr = imageChangeBase64("D://1.png");
        System.out.println(basestr);
        //解密
        base64ChangeImage(basestr,"D://2.png");
    }

    /**
     * 圖片轉BASE64
     * @param imagePath 路徑
     * @return
     */
    public String imageChangeBase64(String imagePath){
        InputStream inputStream = null;
        byte[] data = null;
        try {
            inputStream = new FileInputStream(imagePath);
            data = new byte[inputStream.available()];
            inputStream.read(data);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 加密
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }

    /**
     * BASE轉圖片
     * @param baseStr  base64字符串
     * @param imagePath 生成的圖片
     * @return
     */
    public boolean base64ChangeImage(String baseStr,String imagePath){
        if (baseStr == null){
            return false;
        }
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            // 解密
            byte[] b = decoder.decodeBuffer(baseStr);
            // 處理數據
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            OutputStream out = new FileOutputStream(imagePath);
            out.write(b);
             out.flush();
            out.close();
            return true;
        } catch (Exception e) {
            return false;
        }
    }
}

在線的base64圖片轉換帶有："data:image/jpeg;base64," 解碼之前這個得去掉。