base64转文件保存

package com.hcp.tools.file;

/**
 * @Author：LLF
 * @description:
 * @Date：2023/5/17 20:15
 * @version: V1.0
 */
public enum  Base64FileTypeEnum {
    // 文件类型
    BASE64_FILETYPE_DOC(".doc", "data:application/msword;base64"),
    BASE64_FILETYPE_DOCX(".docx", "data:application/vnd.openxmlformats-officedocument.wordprocessingml.document;base64"),
    BASE64_FILETYPE_XLS(".xls", "data:application/vnd.ms-excel;base64"),
    BASE64_FILETYPE_XLSX(".xlsx", "data:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;base64"),
    BASE64_FILETYPE_PDF(".pdf", "data:application/pdf;base64"),
    BASE64_FILETYPE_PPT(".ppt", "data:application/vnd.ms-powerpoint;base64"),
    BASE64_FILETYPE_PPTX(".pptx", "data:application/vnd.openxmlformats-officedocument.presentationml.presentation;base64"),
    BASE64_FILETYPE_TXT(".txt", "data:text/plain;base64"),

    // 图片类型
    BASE64_FILETYPE_PNG(".png", "data:image/png;base64"),
    BASE64_FILETYPE_JPG(".jpg", "data:image/jpeg;base64"),
    BASE64_FILETYPE_JPEG(".jpeg", "data:image/jpeg;base64"),
    BASE64_FILETYPE_GIF(".gif", "data:image/gif;base64"),
    BASE64_FILETYPE_SVG(".svg", "data:image/svg+xml;base64"),
    BASE64_FILETYPE_ICO(".ico", "data:image/x-icon;base64"),
    BASE64_FILETYPE_BMP(".bmp", "data:image/bmp;base64"),

//    // 二进制流
//    BASE64_FILETYPE_OCTET_STREAM("octet-stream", "data:application/octet-stream;base64,"),
    ;

    private Base64FileTypeEnum(String code, String value) {
        this.code = code;
        this.value = value;
    }

    private String code;
    private String value;

    public String getCode() {return code;}
    public String getValue() {return value;}

    public static String getFileType(String value) {
        Base64FileTypeEnum[] types = values();
        for (Base64FileTypeEnum x : types) {
            if (x.getValue().equals(value)) {
                return x.getCode();
            }
        }
        return null;
    }
}

    public static File base64ToFile(String base64, String fileName,String path) {
        File file = null;
        File dir = new File(path);
        if (!dir.exists() && !dir.isDirectory()) {
            dir.mkdirs();
        }
        BufferedOutputStream bos = null;
        FileOutputStream fos = null;
        try {
            //截取base64头部，获取文件类型
            String fileType = Base64FileTypeEnum.getFileType(base64.substring(0, base64.indexOf(",")));
            //去掉头部，防止转换文件后打开显示文件损坏
            String s = base64.substring(base64.indexOf(",") + 1);
            byte[] bytes = new BASE64Decoder().decodeBuffer(s);
            file = new File(path + "/" + fileName + fileType);
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);
            bos.write(bytes);
        } catch (IOException 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();
                }
            }
        }
        return file;
    }