java得到图片的base64值

浅浅的花香味﹌ 2024-03-31 14:04 46阅读 0赞

此方法不用导依赖,windows和linux都能用.

上代码

>     package com.export.diaojiekou.base64_img;
>     
>     import sun.misc.BASE64Decoder;
>     import sun.misc.BASE64Encoder;
>     
>     import java.io.*;
>     
>     public class ImageBase64Util {
>         /**
>          * 本地文件（图片、excel等）转换成Base64字符串
>          *
>          * @param imgPath     
>          */
>         public static String convertFileToBase64(String imgPath) {
>             byte[] data = null;
>             // 读取图片字节数组
>             try {
>                 InputStream in = new FileInputStream(imgPath);
>                 System.out.println("文件大小（字节）="+in.available());
>                 data = new byte[in.available()];
>                 in.read(data);
>                 in.close();
>             } catch (IOException e) {
>                 e.printStackTrace();
>             }
>             // 对字节数组进行Base64编码，得到Base64编码的字符串
>             BASE64Encoder encoder = new BASE64Encoder();
>             String base64Str = encoder.encode(data);
>             return base64Str;
>         }
>     
>         /**
>          * 将base64字符串，生成文件
>          */
>         public static File convertBase64ToFile(String fileBase64String, String filePath, String fileName) {
>     
>             BufferedOutputStream bos = null;
>             FileOutputStream fos = null;
>             File file = null;
>             try {
>                 File dir = new File(filePath);
>                 if (!dir.exists() && dir.isDirectory()) {//判断文件目录是否存在
>                     dir.mkdirs();
>                 }
>     
>                 BASE64Decoder decoder = new BASE64Decoder();
>                 byte[] bfile = decoder.decodeBuffer(fileBase64String);
>     
>                 file = new File(filePath + File.separator + fileName);
>                 fos = new FileOutputStream(file);
>                 bos = new BufferedOutputStream(fos);
>                 bos.write(bfile);
>                 return file;
>             } catch (Exception e) {
>                 e.printStackTrace();
>                 return null;
>             } finally {
>                 if (bos != null) {
>                     try {
>                         bos.close();
>                     } catch (IOException e1) {
>                         e1.printStackTrace();
>                     }
>                 }
>                 if (fos != null) {
>                     try {
>                         fos.close();
>                     } catch (IOException e1) {
>                         e1.printStackTrace();
>                     }
>                 }
>             }
>         }
>     }