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上传页 下载文件名:
# 文件路径, 注意路径末尾一定要带上/ user.file.path=E:/upload/
package com.example.springboot_jxc_0511.common; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; /** * 参考:https://blog.csdn.net/sinat_34104446/article/details/100178488 */ @Component public class CustomWebConfiguration implements WebMvcConfigurer { @Value("${user.file.path}") private String filePath; @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { // 注意如果filePath是写死在这里,一定不要忘记尾部的/或者\\,这样才能读取其目录下的文件 registry.addResourceHandler("/**").addResourceLocations( "classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "file:/" + filePath, "classpath:/webapp/"); } }
package com.example.springboot_jxc_0511.common; import javax.servlet.http.HttpServletResponse; import java.io.*; public class FileUtil { public static void download(String filename, HttpServletResponse res) throws IOException { // 发送给客户端的数据 OutputStream outputStream = res.getOutputStream(); byte[] buff = new byte[1024]; BufferedInputStream bis = null; // 读取filename bis = new BufferedInputStream(new FileInputStream(new File("e:/upload/" + filename))); int i = bis.read(buff); while (i != -1) { outputStream.write(buff, 0, buff.length); outputStream.flush(); i = bis.read(buff); } } }
package com.example.springboot_jxc_0511.common; import com.baomidou.mybatisplus.core.metadata.OrderItem; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.example.springboot_jxc_0511.common.FileUtil; import com.example.springboot_jxc_0511.jxc.common.Constants; import com.example.springboot_jxc_0511.jxc.entity.Product; import com.example.springboot_jxc_0511.jxc.entity.Sale; import com.example.springboot_jxc_0511.jxc.entity.Users; import com.example.springboot_jxc_0511.jxc.service.IProductService; import com.example.springboot_jxc_0511.jxc.service.ISaleService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.transaction.annotation.Transactional; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import org.springframework.web.context.request.RequestContextHolder; import org.springframework.web.context.request.ServletRequestAttributes; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import java.io.File; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; import java.util.Date; import java.util.List; /** ** 前端控制器 *
* * @author gongxl * @since 2021-05-11 */ @Controller @RequestMapping public class UploadController { @Value("${user.file.path}") private String filePath; /** * @Author GongXl * @Description * @Date 2021/5/20 14:44 * @Param [model] * @return java.lang.String **/ @RequestMapping("/toUpload") public String toUpload(Model model) { return "upload"; } /** * @Author GongXl * @Description 单文件上传 * @Date 2021/5/20 14:47 * @Param [file, model] * @return java.lang.String **/ @PostMapping("/uploadFile") public String upload(@RequestParam("file") MultipartFile file, Model model){ if (file.isEmpty()){ model.addAttribute("message", "The file is empty!"); return "upload"; } try{ byte[] bytes = file.getBytes(); Path path = Paths.get(filePath + file.getOriginalFilename()); Files.write(path, bytes); model.addAttribute("message", "succes"); }catch (Exception e){ e.printStackTrace(); } return "upload"; } /** * 多文件上传 * @param request * @param model * @return */ @PostMapping("/multiUpload") public String multiUpload(HttpServletRequest request, Model model) { Listfiles = ((MultipartHttpServletRequest) request).getFiles("file"); File fileTemp = new File(filePath); //判断文件父目录是否存在 if(!fileTemp.exists()){ //不存在就创建一个 fileTemp.mkdirs(); } for (int i = 0; i < files.size(); i++) { MultipartFile file = files.get(i); if (file.isEmpty()) { model.addAttribute("message", "上传第"+i+"个文件失败。"); } String fileName = file.getOriginalFilename(); File dest = new File(filePath + fileName); try { file.transferTo(dest); System.out.println(dest.getAbsolutePath()); model.addAttribute("message", "succes"); model.addAttribute("filePath","/"+fileName); } catch (IOException e) { model.addAttribute("message", "上传异常"); } } return "upload"; } /** * 下载文件 * @param fileName * @throws IOException */ @RequestMapping(value = "/download/{fileName:.+}") public void download(@PathVariable String fileName) throws IOException { ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); HttpServletResponse response = requestAttributes.getResponse(); // 设置信息给客户端不解析 String type = fileName.substring(fileName.lastIndexOf(".")+1); // 设置contenttype,即告诉客户端所发送的数据属于什么类型 response.setHeader("Content-type",type); // 设置编码 String hehe = new String(fileName.getBytes("utf-8"), "iso-8859-1"); // 设置扩展头,当Content-Type 的类型为要下载的类型时 , 这个信息头会告诉浏览器这个文件的名字和类型。 response.setHeader("Content-Disposition", "attachment;filename=" + hehe); FileUtil.download(fileName, response); } }
4.0.0 org.springframework.boot spring-boot-starter-parent 2.4.5 com.example springboot_jxc_0511 0.0.1-SNAPSHOT springboot_jxc_0511 Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-thymeleaf org.springframework.boot spring-boot-starter-web MySQL mysql-connector-java runtime org.projectlombok lombok true com.baomidou mybatis-plus-boot-starter 3.4.2 com.baomidou mybatis-plus-generator 3.4.1 org.apache.velocity velocity-engine-core 2.3 org.springframework.boot spring-boot-starter-test test org.webjars webjars-locator 0.40 org.webjars.bower jquery 3.6.0 org.webjars bootstrap 5.0.0 org.webjars layui 2.5.7 org.springframework.boot spring-boot-maven-plugin org.projectlombok lombok
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