同步代码
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package org.dromara.common.core.enums;
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/**
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* 常用文件的文件头如下：(以前六位为准)
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* JPEG (jpg)，文件头：FFD8FF
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* PNG (png)，文件头：89504E47
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* GIF (gif)，文件头：47494638
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* TIFF (tif)，文件头：49492A00
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* Windows Bitmap (bmp)，文件头：424D
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* CAD (dwg)，文件头：41433130
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* Adobe Photoshop (psd)，文件头：38425053
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* Rich Text Format (rtf)，文件头：7B5C727466
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* XML (xml)，文件头：3C3F786D6C
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* HTML (html)，文件头：68746D6C3E
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* Email [thorough only] (eml)，文件头：44656C69766572792D646174653A
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* Outlook Express (dbx)，文件头：CFAD12FEC5FD746F
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* Outlook (pst)，文件头：2142444E
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* MS Word/Excel (xls.or.doc)，文件头：D0CF11E0
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* MS Access (mdb)，文件头：5374616E64617264204A
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* WordPerfect (wpd)，文件头：FF575043
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* Postscript (eps.or.ps)，文件头：252150532D41646F6265
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* Adobe Acrobat (pdf)，文件头：255044462D312E
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* Quicken (qdf)，文件头：AC9EBD8F
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* Windows Password (pwl)，文件头：E3828596
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* ZIP Archive (zip)，文件头：504B0304
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* RAR Archive (rar)，文件头：52617221
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* Wave (wav)，文件头：57415645
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* AVI (avi)，文件头：41564920
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* Real Audio (ram)，文件头：2E7261FD
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* Real Media (rm)，文件头：2E524D46
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* MPEG (mpg)，文件头：000001BA
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* MPEG (mpg)，文件头：000001B3
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* Quicktime (mov)，文件头：6D6F6F76
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* Windows Media (asf)，文件头：3026B2758E66CF11
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* MIDI (mid)，文件头：4D546864
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*/
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public enum ImageType {
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JPEG("jpg", "FFD8FF"),
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PNG("png","89504E47"),
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Windows_Bitmap("bmp","424D"),
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GIF("gif","47494638"),
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TIFF("tif","49492A00"),
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CAD("dwg","41433130"),
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Adobe_Photoshop("psd","38425053"),
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XML("xml","3C3F786D6C"),
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HTML("html","68746D6C3E"),
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Adobe_Acrobat("pdf","255044462D312E"),
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ZIP_Archive("zip","504B0304"),
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RAR_Archive("rar","52617221"),
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Wave("wav","57415645"),
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AVI("avi","41564920");
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private final String suffix;
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private final String headCode;
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ImageType(String suffix, String headCode) {
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this.suffix = suffix;
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this.headCode = headCode;
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}
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public String getSuffix() {
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return suffix;
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}
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public String getHeadCode() {
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return headCode;
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}
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}
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package org.dromara.common.core.utils;
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import cn.hutool.core.io.IoUtil;
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import lombok.extern.slf4j.Slf4j;
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import org.dromara.common.core.enums.ImageType;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.Base64;
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/**
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* [base64 加密解密工具类]
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*
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* @author : [lxj]
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* @version : [v1.0]
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* @createTime : [2021/4/27 12:54]
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*/
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@Slf4j
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public class Base64Utils {
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public Base64Utils(){}
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/**
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* 文件路径转base64
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* @param path 文件路径
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* @return 如果成功返回base64 字符串，否则返回null
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*/
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public static String file2Base64(String path){
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File f = new File(path);
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if(f.exists()){
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return file2Base64(f);
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}
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return null;
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}
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/**
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* 文件转base64
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* @param filePath 文件对象
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* @return 如果成功返回base64 字符串，否则返回null
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*/
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public static String file2Base64(File filePath){
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return file2Base64(filePath.toPath());
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}
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/**
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* 文件转base64
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* @param p Path 对象
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* @return 如果成功返回base64 字符串，否则返回null
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*/
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public static String file2Base64(Path p) {
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try {
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byte[] b = Files.readAllBytes(p);
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return byte2Base64(b);
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} catch (IOException e) {
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log.error("文件转base64失败, msg:" + e.getMessage());
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return null;
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}
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}
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/**
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* 输入流转base64
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* @param inputStream 输入流
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* @return 如果成功返回base64 字符串，否则返回null
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*/
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public static String stream2Base64(InputStream inputStream){
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try {
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byte [] b = IoUtil.readBytes(inputStream);
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return byte2Base64(b);
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} catch (Exception e) {
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log.error("输入流转base64失败, msg:" + e.getMessage());
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return null;
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}
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}
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/**
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* 字节数组转base64
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* @param b 字节数组
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* @return
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*/
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public static String byte2Base64(byte [] b){
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assert b != null && b.length > 0;
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return Base64.getEncoder().encodeToString(b);
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}
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/**
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* 通过文件的base计算文件的格式
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* @param base64 文件的base64
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* @return
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*/
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public static String getType(String base64){
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byte[] b = Base64.getDecoder().decode(base64);
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return getType(b);
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}
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public static String getType(byte [] b){
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try {
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String xxx = bytesToHexString(b);
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assert xxx != null && !xxx.isEmpty();
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ImageType[] types = ImageType.values();
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String suffix = null;
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for (ImageType type: types) {
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if(xxx.toUpperCase().startsWith(type.getHeadCode())){
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suffix = type.getSuffix();
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break;
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}
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}
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return suffix;
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}catch (Exception e) {
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return null;
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}
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}
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/**
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* 判断文件格式 取前6个字符来进行判断
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* @param src 文件字节数组
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* @return 返回文件字节数组前6位编码
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*/
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public static String bytesToHexString(byte[] src) {
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StringBuilder stringBuilder = new StringBuilder();
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int pifNum = 10;
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if (src == null || src.length <= pifNum) {
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return null;
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}
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for (int i = 0; i < pifNum; i ++) {
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int v = src[i] & 0xFF;
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String hv = Integer.toHexString(v);
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if (hv.length() < 2) {
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stringBuilder.append(0);
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}
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stringBuilder.append(hv);
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}
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return stringBuilder.toString();
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}
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public static String handleBase64Header(String webBase64Code){
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String [] s = webBase64Code.split("base64,");
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if(s.length == 2){
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return s[1];
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}
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return webBase64Code;
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}
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}
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