base64字符串转化成图片

Posted 2022-08-12 sung1024

package com.dhht.wechat.util;

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

import java.io.*;

/**
 * @Author: sh
 * @Description: ImgUtil
 * @Date: 9:14 2019/7/1
 */
public class ImgUtil 


    /**
     * 图片转化成base64字符串
     *
     * @param imgPath
     * @return
     */
    public static String GetImageStr(String imgPath) // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
        String imgFile = imgPath;// 待处理的图片
        InputStream in = null;
        byte[] data = null;
        String encode = null; // 返回Base64编码过的字节数组字符串
        // 对字节数组Base64编码
        BASE64Encoder encoder = new BASE64Encoder();
        try 
            // 读取图片字节数组
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];
            in.read(data);
            encode = encoder.encode(data);
         catch (IOException e) 
            e.printStackTrace();
         finally 
            try 
                in.close();
             catch (IOException e) 
                // TODO Auto-generated catch block
                e.printStackTrace();
            
        
        return encode;
    

    /**
     * base64字符串转化成图片
     *
     * @param imgData     图片编码
     * @param imgFilePath 存放到本地路径
     * @return
     * @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);
            // Base64解码
            byte[] b = decoder.decodeBuffer(imgData);
            for (int i = 0; i < b.length; ++i) 
                if (b[i] < 0) // 调整异常数据
                    b[i] += 256;
                
            
            out.write(b);
         catch (FileNotFoundException e) 
            // TODO Auto-generated catch block
            e.printStackTrace();
         catch (IOException e) 
            // TODO Auto-generated catch block
            e.printStackTrace();
         finally 
            out.flush();
            out.close();
            return true;