使用Java,实现图片与Base64编码互转的程序

因工作需要,特意写段将图片与Base64编码实现互转的程序。本程序使用到sun.misc.BASE64Decoder.jar,请在网上自行下载此Jar包。或者单击下面链接: https://pan.baidu.com/s/1xRV-UL2JgjskHApuPoS2Og 提取码: ptij

转换代码参考如下: 

package com.clzhang.util;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import Decoder.BASE64Decoder;
import Decoder.BASE64Encoder;

public class Base64Util {
    /**
     * 图片转化成Base64字符串,有异常返回null,并打印异常信息
     * @param imgPath 图片物理路径
     * @return BASE64编码格式字符串
     */
    public static String getImageStr(String imgPath) {
        InputStream in = null;
        byte[] data = null;
        String result = null;
        BASE64Encoder encoder = new BASE64Encoder();
        try {
            in = new FileInputStream(imgPath);
            data = new byte[in.available()];
            in.read(data);
            result = encoder.encode(data);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * base64字符串转化成图片,成功返回trur,有异常返回false
     * @param imgData     Base64字符串
     * @param imgFilePath 图片存放物理路径
     * @return 成功与否
     * @throws IOException
     */
    @SuppressWarnings("finally")
    public static boolean generateImage(String imgData, String imgFilePath) throws IOException { // 对字节数组字符串进行Base64解码并生成图片
        if (imgData == null) // 图像数据为空
            return false;
        BASE64Decoder decoder = new BASE64Decoder();
        OutputStream out = null;
        try {
            out = new FileOutputStream(imgFilePath);
            byte[] b = decoder.decodeBuffer(imgData);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            out.write(b);
            out.close();
            
            return true;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return false;
    }
    
    public static void main(String[] args) throws Exception {
        String imagePath = "D:\TDDOWNLOAD\code\mycode.gif";
        String imagePath2 = "D:\TDDOWNLOAD\code\mycode2.gif";
        
        String base64Str = getImageStr(imagePath);
        System.out.println(base64Str);
        generateImage(base64Str, imagePath2);
    }
    
}
原文地址:https://www.cnblogs.com/nayitian/p/15064237.html