这篇文章主要介绍“SpringBoot如何实现多文件上传”的相关知识，小编通过实际案例向大家展示操作过程，操作方法简单快捷，实用性强，希望这篇“SpringBoot如何实现多文件上传”文章能帮助大家解决问题。
1.代码结构：
2.Controller层
package com.yqifei.upload.controller; import io.swagger.annotations.Api; import org.springframework.web.bind.annotation.*; import org.springframework.web.multipart.multipartfile; import javax.servlet.http.HttpServletRequest; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.UUID; /** * @ClassName UploadController * @Description Todo * @Author jiangyuntao * @Data 2023/3/7 23:52 * @Version 1.0 * @Email yuntaojiang@foxmail.com */ @RestController @CrossOrigin @RequestMapping("/posts") @Api(tags = "文件上传控制器") public class UploadController { /* http://localhost:8088/swagger-ui.html# */ @PostMapping(value="/upload") @CrossOrigin public List<String> fileload(@RequestParam(value = "file") multipartfile[] file, HttpServletRequest request) throws IOException { System.out.println(file.length); String savaLaction="d:/data/"; String fileSaveName; List<String> imageUri = new ArrayList<>(); for (multipartfile multipartfile:file) { System.out.println("文件"+multipartfile.getoriginalFilename()); fileSaveName = UUID.randomUUID().toString()+multipartfile.getoriginalFilename(); multipartfile.transferTo(new File(savaLaction,fileSaveName)); String res = request.getScheme()+"://"+request.getServerName()+":"+"8080"+savaLaction+"/"+fileSaveName; imageUri.add(res); } System.out.println(imageUri); return imageUri; } }
3.跨域拦截器配置
package com.yqifei.upload.utils; import org.springframework.context.annotation.Configuration; import javax.servlet.*; import javax.servlet.annotation.WebFilter; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebFilter(filterName = "CorsFilter") @Configuration public class CorsFilter implements Filter { @Override public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, servletexception { HttpServletResponse response = (HttpServletResponse) res; response.setHeader("Access-Control-Allow-Origin","*"); response.setHeader("Access-Control-Allow-Credentials", "true"); response.setHeader("Access-Control-Allow-Methods", "POST, GET, PATCH, DELETE, PUT"); response.setHeader("Access-Control-Max-Age", "3600"); response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept"); chain.doFilter(req, res); } }
4.application.properties配置
# 应用名称 spring.application.name=upload # 应用服务 WEB 访问端口 server.port=8088 spring.web.resources.static-locations=file:d:/data/ spring.servlet.multipart.max-request-size=50MB spring.servlet.multipart.max-file-size=50MB
5.前端页面
<!DOCTYPE html> <html> <head> <Meta charset="UTF-8" /> <title>Multiple File Upload</title> </head> <body> <h2>Multiple File Upload</h2> <form> <input type="file" id="fileInput" multiple /> <button type="button" onclick="uploadFiles()">Upload</button> </form> <div id="progress"></div> <div>图片返回值地址：</div> <div id="result"></div> </body> <script> function uploadFiles() { const files = document.getElementById("fileInput").files; const xhr = new XMLHttpRequest(); const formData = new FormData(); for (let i = 0; i < files.length; i++) { formData.append("file", files[i]); } xhr.open("POST", "http://localhost:8088/posts/upload"); xhr.upload.addEventListener("progress", function (event) { if (event.lengthComputable) { const percent = Math.round((event.loaded / event.total) * 100); const progress = document.getElementById("progress"); progress.innerHTML = "Upload progress: " + percent + "%"; } }); xhr.addEventListener("load", function (event) { const response = JSON.parse(event.target.responseText); console.log(response); // 在HTML页面上找到需要显示响应结果的元素 const resultElement = document.getElementById("result"); // 更新元素的文本内容为服务器返回的值 resultElement.textContent = response; }); xhr.send(formData); } </script> </html>
6.效果展示
7.获取图片的url并且读取图片
加上下面这句
<Context docBase ="/home/springbootVue/files" path ="/home/springbootVue/files" debug ="0" reloadable ="true"/> // docBase代表文件路径，path是浏览器访问时的路径。 // 若自己创建的文件夹在tomcat目录的webapps中,不同之处： docBase直接写文件夹文字即可（注意：没有/） 例如 docBase ="home/springbootVue/files"
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