Spring Boot项目07之文件上传与回显项目源码

package top.picacho.bbs.controller.common; import org.springframework.stereotype.Controller; import org.springframework.util.CollectionUtils; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; import org.springframework.web.multipart.commons.CommonsMultipartResolver; import top.picacho.bbs.common.Constants; import top.picacho.bbs.util.Result; import top.picacho.bbs.util.ResultGenerator; import top.picacho.bbs.util.SystemUtil; import javax.servlet.http.HttpServletRequest; import java.io.File; import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; import java.text.SimpleDateFormat; import java.util.*; @Controller public class UploadController { @PostMapping({"/uploadFile"}) @ResponseBody public Result upload(HttpServletRequest httpServletRequest, @RequestParam("file") MultipartFile file) throws URISyntaxException { String fileName = file.getOriginalFilename(); String suffixName = fileName.substring(fileName.lastIndexOf(".")); // 生成文件名称通用方法 SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss"); Random r = new Random(); StringBuilder tempName = new StringBuilder(); tempName.append(sdf.format(new Date())).append(r.nextInt(100)).append(suffixName); String newFileName = tempName.toString(); File fileDirectory = new File(Constants.FILE_UPLOAD_DIC); //创建文件 File destFile = new File(Constants.FILE_UPLOAD_DIC + newFileName); try { if (!fileDirectory.exists()) { if (!fileDirectory.mkdir()) { throw new IOException("文件夹创建失败,路径为：" + fileDirectory); } } file.transferTo(destFile); Result resultSuccess = ResultGenerator.genSuccessResult(); resultSuccess.setData(SystemUtil.getHost(new URI(httpServletRequest.getRequestURL() + "")) + "/upload/" + newFileName); return resultSuccess; } catch (IOException e) { e.printStackTrace(); return ResultGenerator.genFailResult("文件上传失败"); } } @PostMapping({"/uploadFiles"}) @ResponseBody public Result uploadV2(HttpServletRequest httpServletRequest) throws URISyntaxException { List<MultipartFile> multipartFiles = new ArrayList<>(8); CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(httpServletRequest.getSession().getServletContext()); if (multipartResolver.isMultipart(httpServletRequest)) { MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) httpServletRequest; Iterator<String> iter = multiRequest.getFileNames(); int total = 0; while (iter.hasNext()) { if (total > 5) { return ResultGenerator.genFailResult("最多上传5张图片"); } total += 1; MultipartFile file = multiRequest.getFile(iter.next()); multipartFiles.add(file); } } if (CollectionUtils.isEmpty(multipartFiles)) { return ResultGenerator.genFailResult("参数异常"); } if (multipartFiles != null && multipartFiles.size() > 5) { return ResultGenerator.genFailResult("最多上传5张图片"); } List<String> fileNames = new ArrayList(multipartFiles.size()); for (int i = 0; i < multipartFiles.size(); i++) { String fileName = multipartFiles.get(i).getOriginalFilename(); String suffixName = fileName.substring(fileName.lastIndexOf(".")); //生成文件名称通用方法 SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss"); Random r = new Random(); StringBuilder tempName = new StringBuilder(); tempName.append(sdf.format(new Date())).append(r.nextInt(100)).append(suffixName); String newFileName = tempName.toString(); File fileDirectory = new File(Constants.FILE_UPLOAD_DIC); //创建文件 File destFile = new File(Constants.FILE_UPLOAD_DIC + newFileName); try { if (!fileDirectory.exists()) { if (!fileDirectory.mkdir()) { throw new IOException("文件夹创建失败,路径为：" + fileDirectory); } } multipartFiles.get(i).transferTo(destFile); fileNames.add(SystemUtil.getHost(new URI(httpServletRequest.getRequestURL() + "")) + "/upload/" + newFileName); } catch (IOException e) { e.printStackTrace(); return ResultGenerator.genFailResult("文件上传失败"); } } Result resultSuccess = ResultGenerator.genSuccessResult(); resultSuccess.setData(fileNames); return resultSuccess; } }