后台原文  Java -- springboot 配置 文件上传（显示上传进度）

目录

VUE

html

 js

SpringBoot

pom.xml 

application.yml

Listener

config

Configuration

Controller

VUE

html

<el-form-item label="上传资料：">
              <el-upload
                list-type="picture-card"
                :file-list="fileList"
                :headers="uploadData"
                :action="uploadUrl"
                :on-remove="handleRemove"
                :before-upload="uploadBeforeUploadHandle"
                :on-success="uploadSuccessHandle"
                :limit="1"
                :on-change="getProgressRate"
                :class="{disabled:uploadDisabled}"
                :disabled="inpShow"
                :on-preview="handlePictureCardPreview"
              >
                <i class="el-icon-plus"/>
              </el-upload>
              <el-progress v-show="percentageStatus" :percentage="percentage"></el-progress>
            </el-form-item>

 js

let timer = null;
export default {
  name: 'FilesManagementList',
  data() {
    return {
      filesEditDialogVisible: false,
      dialogVisible: false,
      fileList: [],
      uploadUrl: '/apis/index/uploadFile',
      uploadDisabled: false,
      inpShow: false,
      // 上传logo到服务器的目录名
      uploadData: {
        dirName: 'ZiLiao'
      },
      // 进度条进度
      percentage: 0,
      // 进度条显示
      percentageStatus: false
    }
  },

  mounted() {
  },
  methods: {
   
    // 上传
    handlePictureCardPreview(file) {
      this.dialogVisible = true
    },

    // 控制数量对加号的显示、隐藏
    handleLimit(file, fileList) {

    },

    // 处理移除文件
    handleRemove(res, file, fileList) {

    },

    // 上传文件之前格式校验
    uploadBeforeUploadHandle(file) {
      this.percentageStatus = true
    },

    // 上传文件成功
    uploadSuccessHandle(res, file, fileList) {

      return false
    },

    // 获取进度
    getProgressRate(file, fileList) {
      const that = this
      if (this.percentage >= 100) {
        return
      }
      // 查询进度条
      if (file.status === 'ready') {
        timer = window.setInterval(function () {
          that.$http.get('/index/uploadStatus').then((response) => {
            if (response >= 100) {
              that.percentage = 100
              that.clearIntervalA()
            }
            that.percentage = response
          })
        }, 500)
      }
    },

    // 清除定时器
    clearIntervalA() {
      window.clearInterval(timer)
    },
  },

  // 页面卸载清除定时器
  destroyed() {
    window.clearInterval(timer)
  }
}

SpringBoot

pom.xml 

<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.4</version>
</dependency>

application.yml

spring:
  mvc:
    static-path-pattern: /**
  resources:
    static-locations: file:D://file/,classpath:/static/
  http:
    multipart:
      enabled: false

#测试环境
localFileUrl: D:\file
#映射的网络url
mappingFileUrl: /static/

imgurl: http://localhost:8099/

Listener

package com.sample.common.upload;

import org.apache.commons.fileupload.ProgressListener;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpSession;

@Component
public class FileUploadProgressListener implements ProgressListener {

    private HttpSession session;

    public void setSession(HttpSession session) {
        this.session = session;
        session.setAttribute("upload_percent", 0);
    }

    @Override
    public void update(long pBytesRead, long pContentLength, int pItems) {
        int percent = (int) (pBytesRead * 100.0 / pContentLength);
        session.setAttribute("upload_percent", percent);
    }
}

config

package com.sample.common.upload;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

public class CustomMultipartResolver extends CommonsMultipartResolver {

    @Autowired
    private FileUploadProgressListener listener;

    @Override
    protected MultipartParsingResult parseRequest(HttpServletRequest request) throws MultipartException {
        String encoding = determineEncoding(request);
        FileUpload fileUpload = prepareFileUpload(encoding);

        fileUpload.setProgressListener(listener);
        listener.setSession(request.getSession());
        try {
            List<FileItem> fileItems = ((ServletFileUpload) fileUpload).parseRequest(request);
            return parseFileItems(fileItems, encoding);
        }catch (FileUploadException ex) {
            throw new MultipartException("Failed to parse multipart servlet request", ex);
        }
    }
}

Configuration

package com.sample.common.config;

import com.sample.common.upload.CustomMultipartResolver;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.multipart.MultipartResolver;

@Configuration
public class BeanConfig {

    @Bean(name = "multipartResolver")
    public MultipartResolver multipartResolver()
    {
        return new CustomMultipartResolver();
    }
}

Controller

package com.cei.xyd_zgqx_back.web;

import com.cei.xyd_zgqx_back.service.IIndexService;
import com.cei.xyd_zgqx_back.entity.vo.result.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;


@RestController
@RequestMapping("/index")
public class IndexController {

    @Autowired
    private IIndexService indexService;

    /*
     * 文件上传进度
     */
    @GetMapping(value = "/uploadStatus")
    public Integer uploadStatus(HttpServletRequest request){
        HttpSession session = request.getSession();
        Object percent = session.getAttribute("upload_percent");
        return null != percent ? (Integer) percent : 0;
    }

}