酷炫网站欣赏,网站建设建站经验,小软件开发,wordpress 页面目录下文件上传1. pom依赖#xff08;jar包#xff09;2. 文件上传解析器配置3. 上传实现4. 下载||文件展示实现#xff08;io流的实现#xff09;项目下载地址https://github.com/sevenyoungairye/File-Upload1. pom依赖#xff08;jar包#xff09; !-- common upload fi… 文件上传1. pom依赖jar包2. 文件上传解析器配置3. 上传实现4. 下载||文件展示实现io流的实现项目下载地址https://github.com/sevenyoungairye/File-Upload1. pom依赖jar包 !-- common upload file --dependencygroupIdcommons-fileupload/groupIdartifactIdcommons-fileupload/artifactIdversion1.4/version/dependency!-- common upload io--dependencygroupIdcommons-io/groupIdartifactIdcommons-io/artifactIdversion2.5/version/dependency2. 文件上传解析器配置 spring-mvc.xml !-- 文件上传解析器 --bean idmultipartResolver classorg.springframework.web.multipart.commons.CommonsMultipartResolver!--指定总文件大小 单位: b--property namemaxUploadSize value10000000/!--指定单个文件的大小--property namemaxUploadSizePerFile value2000000/!--指定编码--property namedefaultEncoding valueutf-8//bean3. 上传实现 页面展示 %--Created by IntelliJ IDEA.User: echo lovelyDate: 2020/9/5Time: 19:37文件上传测试 demo --% % page contentTypetext/html;charsetUTF-8 languagejava % html headtitleFile Upload Demo../title /head bodyform methodpost enctypemultipart/form-data actionfileUpload1name: input typetext namename / br/file: input typefile namefileUpload / br/input typesubmit valueupload/formbr/多文件上传form methodpost enctypemultipart/form-data actionfileUpload2file1 input typefile nameuploadFiles br/file2 input typefile nameuploadFiles br/input typesubmit valueupload/form/body /html controller接收文件实现 package com.bitqian.controller;import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile;import java.io.File; import java.io.IOException; import java.util.UUID;/** * spring mvc 测试文件上传 * author echo lovely * date 2020/9/5 9:21 */ Controller public class FileUploadDemo {RequestMapping(value /fileUpload1)ResponseBodypublic void upload1(String name, MultipartFile fileUpload) {System.out.println(name);System.out.println(fileUpload);String originalFilename fileUpload.getOriginalFilename();try {// 将文件保存到文件夹//fileUpload.transferTo(new File(f://Temp// originalFilename));String ext originalFilename.substring(originalFilename.lastIndexOf(.));fileUpload.transferTo(new File(f://Temp// UUID.randomUUID() ext));} catch (IOException e) {e.printStackTrace();}}// 多文件上传..RequestMapping(value /fileUpload2)ResponseBodypublic void uploadFile2(MultipartFile[] uploadFiles) {String path f://temp//;File file new File(path);// 文件夹不存在创建temp文件夹if (!file.exists())file.mkdirs();if (uploadFiles ! null) {for (MultipartFile uploadFile : uploadFiles) {String originalFilename uploadFile.getOriginalFilename();System.out.println(源文件名 originalFilename);// uuid 文件后缀名String fileName UUID.randomUUID() originalFilename.substring(originalFilename.lastIndexOf(.));try {// 上传文件到指定目录uploadFile.transferTo(new File(path fileName));} catch (IOException e) {e.printStackTrace();}}}}} 4. 下载||文件展示实现io流的实现 文件下载 RequestMapping(value/download/{id}) public void downloader(HttpServletResponse resp, PathVariable(value id) int stuId) {StudentInfo stu stuInfoService.queryOne(stuId);// 图像路径String imgPath stu.getImgPath();if (imgPath null)return;// 获取图像名的后缀String suffix imgPath.substring(imgPath.lastIndexOf(.));// 设置文件 ContentType 自动判断下载类型resp.setContentType(multipart/form-data);// 设置文件头resp.setHeader(Content-Disposition, attachment;fileNameUUID.randomUUID() suffix);FileInputStream fis null;ServletOutputStream outputStream null;try {fis new FileInputStream(new File(imgPath));// 使用流输出到客户端outputStream resp.getOutputStream();byte[] b new byte[1024];// 读取到数组里面int read fis.read(b);while(read ! -1) {outputStream.write(b, 0, read);read fis.read(b);}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {if (outputStream ! null)outputStream.close();if (fis ! null)fis.close();} catch (IOException e) {e.printStackTrace();}}}文件展示到页面 /*** 图片展示* throws IOException */ RequestMapping(/shwoImg/{id}) public void shwoImg(PathVariable(value id) int stuId, HttpServletResponse resp) {StudentInfo stu stuInfoService.queryOne(stuId);// 从数据库中取到图片路径String imgPath stu.getImgPath();if (imgPath null)return;// 设置文件展示的类型resp.setContentType(image/jpeg);// 拿到out流ServletOutputStream out null;// 文件读取FileInputStream fis null;try {out resp.getOutputStream();// 读取到文件fis new FileInputStream(new File(imgPath));// 使用一个byte数组byte[] b new byte[1024];// 将读取的字节装入byte数组int read fis.read(b);while (read ! -1) {out.write(b, 0, read);read fis.read(b);}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {if (fis ! null)fis.close();} catch (IOException e) {e.printStackTrace();}try {if (out ! null) {out.flush();out.close();}} catch (IOException e) {e.printStackTrace();}}}