Base64与File之间的相互转化

傷城~ 2023-06-26 03:26 36阅读 0赞

/** * * @param path * @return String * @description 将文件转base64字符串 * @date 2018年3月20日 * @author changyl * File转成编码成BASE64 */
     
        public static  String fileToBase64(String path) { 
            String base64 = null;
            InputStream in = null;
            try { 
                File file = new File(path);
                in = new FileInputStream(file);
                byte[] bytes=new byte[(int)file.length()];
                in.read(bytes);
                base64 = Base64.getEncoder().encodeToString(bytes);
            } catch (Exception e) { 
                e.printStackTrace();
            } finally { 
                if (in != null) { 
                    try { 
                        in.close();
                    } catch (IOException e) { 
                        e.printStackTrace();
                    }
                }
            }
            return base64;
        }

//BASE64解码成File文件
        public static void base64ToFile(String destPath,String base64, String fileName) { 
            File file = null;
            //创建文件目录
            String filePath=destPath;
            File  dir=new File(filePath);
            if (!dir.exists() && !dir.isDirectory()) { 
                dir.mkdirs();
            }
            BufferedOutputStream bos = null;
            java.io.FileOutputStream fos = null;
            try { 
                byte[] bytes = Base64.getDecoder().decode(base64);
                file=new File(filePath+"/"+fileName);
                fos = new java.io.FileOutputStream(file);
                bos = new BufferedOutputStream(fos);
                bos.write(bytes);
            } catch (Exception e) { 
                e.printStackTrace();
            } finally { 
                if (bos != null) { 
                    try { 
                        bos.close();
                    } catch (IOException e) { 
                        e.printStackTrace();
                    }
                }
                if (fos != null) { 
                    try { 
                        fos.close();
                    } catch (IOException e) { 
                        e.printStackTrace();
                    }
                }
            }
        }

需要注意：标红的base64在这里需要去掉  
![在这里插入图片描述][20191230122832593.png]

本文参考自：https://blog.csdn.net/qq\_35971258/article/details/80593500

[20191230122832593.png]: https://img-blog.csdnimg.cn/20191230122832593.png