base64生成图片——图片转换变成base64

桃扇骨 2022-06-15 05:22 422阅读 0赞

# base64生成图片——图片转换变成base64 #

如题。

下面上货。

package com.xueyou.demo;
    
    import org.apache.commons.lang3.StringUtils;
    import sun.misc.BASE64Decoder;
    import sun.misc.BASE64Encoder;
    
    import java.io.*;
    import java.util.UUID;
    
    
    public class Base64Utils {
        /**
         * 根据base64编码生成图片，保存在Path中
         *
         * @param base64Code
         * @param filePath
         */
        public static boolean base64ToPic(String base64Code, String filePath) {
            if (base64Code == null) {
                return false;
            }
            //文件不存在
            File existsFilePath = new File(filePath);
            if (!existsFilePath.exists()) {
                existsFilePath.mkdir();
            }
            String handledBase64Code = "";
            if (StringUtils.contains(base64Code, "base64,")) {
                handledBase64Code = StringUtils.substringAfter(base64Code, "base64,");
            }
            BASE64Decoder decoder = new BASE64Decoder();
            try {
                //Base64解码
                byte[] b = decoder.decodeBuffer(handledBase64Code);
                for (int i = 0; i < b.length; ++i) {
                    if (b[i] < 0) {//调整异常数据
                        b[i] += 256;
                    }
                }
                //生成jpeg图片
                String path = filePath + "/" + UUID.randomUUID() + ".jpg";
                OutputStream out = new FileOutputStream(path);
                out.write(b);
                out.flush();
                out.close();
                return true;
            } catch (Exception e) {
                return false;
            }
        }
    
        /**
         * 图片生成base64编码
         * @param imgPath
         * @return
         */
        public static String PicToBase64(String imgPath) {
            String result = "";
            File imgFile = new File(imgPath);
            if(!imgFile.exists()){
                System.out.println("非法路径");
                return result;
            }
            InputStream in = null;
            byte[] data = null;
            //读取图片字节数组
            try
            {
                in = new FileInputStream(imgFile);
                data = new byte[in.available()];
                in.read(data);
                in.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            //对字节数组Base64编码
            BASE64Encoder encoder = new BASE64Encoder();
            return encoder.encode(data);//返回Base64编码过的字节数组字符串
        }
    }

调用方式：

package com.xueyou.demo;
    
    /**
     * Hello world!
     */
    public class App {
        public static void main(String[] args) {
            System.out.println("Hello World!");
            String base64Code = "data:image/jpeg;base64,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";
    
            //调用
            /*if(Base64Utils.base64ToPic(base64Code,"e:/333")){
                System.out.println("ok");
            }else{
                System.out.println("error");
            }*/
    
            //调用
            System.out.println(Base64Utils.PicToBase64("E:/702.jpg"));
        }
    
    
    }