package cn.daenx.demo.controller;import cn.daenx.demo.Aoidj;
import cn.hutool.core.util.ObjectUtil;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;import java.io.File;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.util.List;/*** 文件上传的一些案例*/
@RestController
@RequestMapping("/test")
public class TestController {@PostMapping(value = "/02")@ResponseBodyprivate String req0122(@ModelAttribute Aoidj aoidj,@RequestPart(value = "files",required = false) List<MultipartFile> files) throws Exception {System.out.println(aoidj.getName());System.out.println(aoidj.getAge());//files或者aoidj.getFiles()都可以拿到值for (MultipartFile file : files) {BigDecimal fileSize = getFileSize(file, 2);if (fileSize.compareTo(new BigDecimal("50")) > 0) {throw new RuntimeException("文件大小最多支持50MB");}String fileName = file.getOriginalFilename();if (ObjectUtil.isEmpty(fileName)) {throw new RuntimeException("文件名为空");}String md5 = getMd5(file);String fileId = md5 + getPrefix(file);String FILE_PATH = "D:/home/phcp/file";String path = FILE_PATH + "/test/" + fileId;handFilePath(path);File file1 = new File(path);if (!file1.exists()) {try {file.transferTo(file1);} catch (IOException e) {throw new RuntimeException("保存文件失败");}}}return "ok";}/*** 判断多级路径是否存在，不存在就创建** @param filePath 支持带文件名的Path：如：D:/anxinsign/test1/abc/ttt/a.file，和不带文件名的Path：如：D:/anxinsign/test2/abcaa/ttt2*/public static void handFilePath(String filePath) {String paths[] = {""};//切割路径try {String tempPath = new File(filePath).getCanonicalPath();//File对象转换为标准路径并进行切割，有两种windows和linuxpaths = tempPath.split("\\\\");//windowsif (paths.length == 1) {paths = tempPath.split("/");}//linux} catch (IOException e) {System.out.println("切割路径错误");}//判断是否有后缀boolean hasType = false;if (paths.length > 0) {String tempPath = paths[paths.length - 1];if (tempPath.length() > 0) {if (tempPath.indexOf(".") > 0) {hasType = true;}}}//创建文件夹String dir = paths[0];for (int i = 0; i < paths.length - (hasType ? 2 : 1); i++) {// 注意此处循环的长度，有后缀的就是文件路径，没有则文件夹路径try {dir = dir + "/" + paths[i + 1];//采用linux下的标准写法进行拼接，由于windows可以识别这样的路径，所以这里采用警容的写法File dirFile = new File(dir);if (!dirFile.exists()) {dirFile.mkdir();System.out.println("成功创建目录：" + dirFile.getCanonicalFile());}} catch (Exception e) {System.err.println("文件夹创建发生异常");}}}/*** 获取上传文件的后缀，例如 .png** @param multipartFile* @return* @throws Exception*/public static String getPrefix(MultipartFile multipartFile) {//获取文件名，例如：QQ截图.pngString originalFilename = multipartFile.getOriginalFilename();//获取文件后缀，例如：.pngString prefix = originalFilename.substring(originalFilename.lastIndexOf("."));return prefix;}/*** 获取上传文件的md5* 32位小写** @param multipartFile* @return* @throws Exception*/public static String getMd5(MultipartFile multipartFile) throws Exception {//获取文件的byte信息byte[] uploadBytes = multipartFile.getBytes();//拿到一个MD5转换器MessageDigest md5 = MessageDigest.getInstance("MD5");byte[] digest = md5.digest(uploadBytes);//转换为16进制return new BigInteger(1, digest).toString(16);}/*** 获取文件大小** @param file* @param type 单位，1=KB，2=MB* @return*/public static BigDecimal getFileSize(MultipartFile file, int type) {long size = file.getSize();BigDecimal sizeDecimal = new BigDecimal(size);BigDecimal kbDecimal = new BigDecimal(type == 1 ? "1024" : "1048576");BigDecimal sizeKB = sizeDecimal.divide(kbDecimal, 2, BigDecimal.ROUND_HALF_UP);return sizeKB;}/*** 获取文件大小** @param file* @param type 单位，1=KB，2=MB* @return*/public static BigDecimal getFileSize(File file, int type) {long size = file.length();BigDecimal sizeDecimal = new BigDecimal(size);BigDecimal kbDecimal = new BigDecimal(type == 1 ? "1024" : "1048576");BigDecimal sizeKB = sizeDecimal.divide(kbDecimal, 2, BigDecimal.ROUND_HALF_UP);return sizeKB;}
}