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SpringBoot实现多文件上传的详细示例代码

2023-03-30 09:36:04 作者：Liknananana

文件上传中并没有什么太多的知识点,下面这篇文章主要给大家介绍了关于SpringBoot实现多文件上传的详细示例,文中通过实例代码介绍的非常详细,需要的朋友可以参考下

文件上传

Spring Boot代码

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>
    <h1>Multiple File Upload</h1>
    <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

修改tomcat的server.xml文件

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"

总结

到此这篇关于SpringBoot实现多文件上传的文章就介绍到这了,更多相关SpringBoot多文件上传内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！