将文件转成base64 字符串

最新推荐文章于 2025-10-10 14:43:57 发布

原创最新推荐文章于 2025-10-10 14:43:57 发布 · 2.8k 阅读

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本文介绍了一个Java类，该类提供了将文件转换为Base64编码字符串的方法及从Base64字符串还原文件的功能。同时展示了如何将Base64字符串保存为文本文件。

public 
class FileCode {
 
    /**
     * <p>将文件转成base64 字符串</p>
     * @param path 文件路径
     */
    public
static String encodeBase64File(String path)
throws Exception {
        File  file =
new File(path);
        FileInputStream inputFile =
new FileInputStream(file);
        byte[] buffer =
new byte[(int)file.length()];
        inputFile.read(buffer);
        inputFile.close();
        return
new BASE64Encoder().encode(buffer);
    }
    /**
     * <p>将base64字符解码保存文件</p>
     */
    public
static void 
decoderBase64File(String base64Code,String targetPath) throws
Exception {
        byte[] buffer =
new BASE64Decoder().decodeBuffer(base64Code);
        FileOutputStream out =
new FileOutputStream(targetPath);
        out.write(buffer);
        out.close();
    }
    /**
     * <p>将base64字符保存文本文件</p>
     */
    public
static void 
toFile(String base64Code,String targetPath) throws
Exception {
        byte[] buffer = base64Code.getBytes();
        FileOutputStream out =
new FileOutputStream(targetPath);
        out.write(buffer);
        out.close();
    }
    public
static void 
main(String[] args) {
        try
{
            String base64Code =encodeBase64File("D:\\1.jpg");
            System.out.println(base64Code);
            decoderBase64File(base64Code,
"D:\\2.jpg");
            toFile(base64Code,
"D:\\three.txt");           
        }
catch (Exception e) {
            e.printStackTrace();
        }
    }
 
}