vue2+Spring Boot2.7 大文件分片上传

之前我们文章手把手带大家实现 vue2+Spring Boot2.7 文件上传功能将了上传文件
但如果文件很大就不太好处理了按正常情况甚至因为超量而报错

这里我弄了个足够大的文件
在这里插入图片描述
我们先搭建 Spring Boot2.7 环境
首先 application.yml 代码编写如下

server:
  port: 80
upload:
  path: D:/upload/
spring:
  servlet:
    multipart:
      max-file-size: 500MB
      max-request-size: 500MB

这里我们改了他对请求大小的限制不然你上次300M左右的东西系统直接抛异常了

然后我们将FileUploadController 类代码更改如下

package com.example.javadom.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;

@RestController
public class FileUploadController {

    //读取配置文件中的 upload下的path
    @Value("${upload.path}")
    private String uploadPath;

    @PostMapping("/upload")
    public ResponseEntity<String> uploadFile(@RequestParam("file") MultipartFile file) {
        // 处理上传逻辑，可以根据需要保存文件到指定目录
        // 这里假设保存到D:/upload/目录下
        try {
            String filePath = uploadPath + file.getOriginalFilename();
            file.transferTo(new File(filePath));
            // 进行后续处理，比如返回成功消息给前端
            return ResponseEntity.ok("File uploaded successfully");
        } catch (IOException e) {
            e.printStackTrace();
            // 发生错误时，返回错误消息给前端
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Failed to upload file");
        }
    }
}

然后我们vue代码将 App.vue改成这样

<template>
  <div>
    <input type="file" @change="onFileChange" />
    <button @click="uploadFile">Upload</button>
    <div v-if="uploadProgress !== null">
      Upload progress: {{ uploadProgress }}%
    </div>
  </div>
</template>

<script>
import axios from 'axios';

export default {
  data() {
    return {
      file: null,
      uploadProgress: null,
    };
  },
  methods: {
    onFileChange(event) {
      this.file = event.target.files[0];
    },
    uploadFile() {
      const formData = new FormData();
      formData.append('file', this.file);

      axios
        .post('/upload', formData, {
          headers: {
            'Content-Type': 'multipart/form-data',
          },
          onUploadProgress: (progressEvent) => {
            this.uploadProgress = Math.round(
              (progressEvent.loaded / progressEvent.total) * 100
            );
          },
        })
        .then((response) => {
          console.log('Upload successful',response);
        })
        .catch((error) => {
          console.error('Upload failed', error);
        });
    },
  },
};
</script>