webuploader分片上传的实现代码前后端分离

本文介绍了webuploader分片上传的实现代码（前后端分离），分享给大家，具体如下：

WebUploader是由Baidu WebFE(FEX)团队开发的一个简单的以HTML5为主，FLASH为辅的现代文件上传组件。在现代的浏览器里面能充分发挥HTML5的优势，同时又不摒弃主流IE浏览器，沿用原来的FLASH运行时，兼容IE6+，iOS 6+,android 4+。两套运行时，同样的调用方式，可供用户任意选用。采用大文件分片并发上传，极大的提高了文件上传效率。(这个是从官网上直接copy的解释)

功能描述

1、webuploader是百度研发的上传组件，文档不是特别规整，但是也够用了。

2、前端使用官网的上传图片demo，在此基础上代码略微调整做分片。既可以上传图片也可以上传文件。文件超过分片大小才启用分片。

3、分片上传已做md5校验，达到秒传的效果。分片以后需要合并，可以先分片后合并，也可以边分片边合并，本示例采用的是边分片边合并的方案。

4、后端用springboot做框架搭建。springMVC做rest服务，开启跨域访问。

5、容器用springboot内置的tomcat插件，运行Application的main方法即可启动服务；

显示效果

关键代码前端

rush:js;"> WebUploader.Uploader.register({ 'name': 'webUploaderHookCommand','before-send-file': 'beforeSendFile',"before-send": "beforeSend" },{ beforeSendFile: function(file) { var task = new WebUploader.Deferred(); fileName = file.name; fileSize = file.size; (new WebUploader.Uploader()).md5File(file,10 * 1024 * 1024).progress(function(percentage) {}).then(function(val) { fileMd5 = val; var url = checkUrl; var data = { type: 0,fileName: fileName,fileMd5: fileMd5,fileSize: fileSize }; $.ajax({ type: "POST",url: url,data: data,cache: false,async: false,// 同步 timeout: 1000,// todo 超时的话，只能认为该分片未上传过 dataType: "json",error: function(XMLHttpRequest,textStatus,errorThrown) { file.statusText = 'server_error'; task.reject(); } }).then(function(data,jqXHR) { if(data.rtn == 0) { if(data.obj == 1) { file.statusText = 'file_existed'; task.reject(); } else { task.resolve(); } } else { task.reject(); } }); }); return task.promise(); },beforeSend: function(block) { var task = new WebUploader.Deferred(); var url = checkUrl; var data = { type: 1,chunk: block.chunk,fileSize: block.end - block.start }; $.ajax({ type: "POST",// 同步 timeout: 1000,// todo 超时的话，只能认为该分片未上传过 dataType: "json" }).then(function(data,jqXHR) { if(data.rtn == 0 && data.obj == 1) { task.reject(); // 分片存在，则跳过上传 } else { task.resolve(); } }); this.owner.options.formData.fileMd5 = fileMd5; this.owner.options.formData.chunkSize = chunkSize; return task.promise(); } });

// 实例化 
uploader = WebUploader.create({ 
  pick: { 
    id: '#filePicker',label: '点击选择<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>' 
  },formData: { 
    uid: 123 
  },dnd: '#dndArea',//指定<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>拖拽的区域 
  paste: '#uploader',//指定监听paste事件的容器，如果不指定，不启用此<a href="https://www.jb51.cc/tag/gongneng/" target="_blank" class="keywords">功能</a>。此<a href="https://www.jb51.cc/tag/gongneng/" target="_blank" class="keywords">功能</a>为通过粘贴来<a href="https://www.jb51.cc/tag/tianjia/" target="_blank" class="keywords">添加</a>截屏的<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>。建议设置为document.body. 
  swf: '../plugins/webuploader/Uploader.swf',chunked: true,chunkSize: chunkSize,chunkRetry: false,threads: 1,server: uploadUrl,// runtimeOrder: 'flash',// accept: { 
  //   title: 'Images',//   extensions: 'gif,jpg,jpeg,bmp,png',//   mimeTypes: 'image/*' 
  // },// 禁掉全局的拖拽<a href="https://www.jb51.cc/tag/gongneng/" target="_blank" class="keywords">功能</a>。这样不会出现<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>拖进<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>的时候，把<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>打开。 
  <a href="https://www.jb51.cc/tag/dis/" target="_blank" class="keywords">dis</a>ableGlobalDnd: true,fileNumLimit: 300 //限制多<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a><a href="https://www.jb51.cc/tag/shangchuan/" target="_blank" class="keywords">上传</a>的个数 
  //fileSizeLimit: 200 * 1024 * 1024,// 限制所有<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>的大小 200 M 
  //fileSingleSizeLimit: 50 * 1024 * 1024 // 限制单个<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>的大小 50 M 
}); </pre>

后端

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.bear.upload.util.FileUtil;
import com.bear.upload.util.RETURN;
import com.bear.upload.vo.CheckMd5FileVO;
import com.bear.upload.vo.UploadVO;

@Service
public class ChunkUploadService {

private static Logger LOG = LoggerFactory.getLogger(ChunkUploadService.class);

@Value("${file.upload.path}")
private String UPLOAD_PATH;

private static final String Delimiter = "-";

/**

上传之前校验(整个文件、分片)
@param md5FileVO
@return
*/
public Object check(CheckMd5FileVO md5FileVO) {
Integer type = md5FileVO.getType();
Long chunk = md5FileVO.getChunk();
String fileName = md5FileVO.getFileName();
Long fileSize = md5FileVO.getFileSize();
if (type == 0) {// 未分片校验
String destfilePath = UPLOAD_PATH + File.separator + fileName;
File destFile = new File(destfilePath);
if (destFile.exists() && destFile.length() == fileSize) {
return RETURN.success("文件已存在，跳过",1);
} else {
return RETURN.success("文件不存在",0);
}
} else {// 分片校验
String fileMd5 = md5FileVO.getFileMd5();
String destFileDir = UPLOAD_PATH + File.separator + fileMd5;
String destFileName = chunk + Delimiter + fileName;
String destFilePath = destFileDir + File.separator + destFileName;
File destFile = new File(destFilePath);
if (destFile.exists() && destFile.length() == fileSize) {
return RETURN.success("分片已存在，跳过",1);
} else {
return RETURN.success("分片不存在",0);
}
}
}

/**

文件上传
@param file
@param uploadVO
@param appVersion
@return
*/
public Object upload(MultipartFile file,UploadVO uploadVO) {
Long chunk = uploadVO.getChunk();
if (chunk == null) {// 没有分片
return UnChunkUpload(file,uploadVO);
} else {// 分片
return ChunkUpload(file,uploadVO);
}
}

/**

分片上传
@param file
@param uploadVO
@param appVersion
@return
*/
public Object ChunkUpload(MultipartFile file,UploadVO uploadVO) {
String fileName = uploadVO.getName();
String fileMd5 = uploadVO.getFileMd5();
Long chunk = uploadVO.getChunk();// 当前片
Long chunks = uploadVO.getChunks();// 总共多少片

// 分片目录创建 
String chunkDirPath = UPLOAD_PATH + File.separator + fileMd5; 
File chunkDir = new File(chunkDirPath); 
if (!chunkDir.exists()) { 
  chunkDir.mkdirs(); 
} 
// 分片文件上传 
String chunkFileName = chunk + Delimiter + fileName; 
String chunkFilePath = chunkDir + File.separator + chunkFileName; 
File chunkFile = new File(chunkFilePath); 
try { 
  file.transferTo(chunkFile); 
} catch (Exception e) { 
  LOG.error("分片上传出错",e); 
  return RETURN.fail("分片上传出错",1); 
} 
// 合并分片 
Long chunkSize = uploadVO.getChunkSize(); 
long seek = chunkSize * chunk; 
String destFilePath = UPLOAD_PATH + File.separator + fileName; 
File destFile = new File(destFilePath); 
if (chunkFile.length() > 0) { 
  try { 
    FileUtil.randomAccessFile(chunkFile,destFile,seek); 
  } catch (IOException e) { 
    LOG.error("分片{}合并失败：{}",chunkFile.getName(),e.getMessage()); 
    return RETURN.fail("分片合并失败",1); 
  } 
} 
if (chunk == chunks - 1) { 
  // <a href="https://www.jb51.cc/tag/shanchu/" target="_blank" class="keywords">删除</a>分片<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>夹 
  FileUtil.deleteDirectory(chunkDirPath); 

  return RETURN.success("<a href="https://www.jb51.cc/tag/shangchuan/" target="_blank" class="keywords">上传</a>成功",1); 
} else { 
  return RETURN.fail("<a href="https://www.jb51.cc/tag/shangchuan/" target="_blank" class="keywords">上传</a>中...",1); 
}

}

/**

未分片上传
@param file
@param uploadVO
@param appVersion
@return
*/
public Object UnChunkUpload(multipartfile file,UploadVO uploadVO) {
String fileName = uploadVO.getName();
// String fileMd5 = uploadVO.getFileMd5();
// 文件上传
File destFile = new File(UPLOAD_PATH + File.separator + fileName);
if (file != null && !file.isEmpty()) {
// 上传目录
File fileDir = new File(UPLOAD_PATH);
if (!fileDir.exists()) {
fileDir.mkdirs();
}
if (destFile.exists()) {
destFile.delete();
}
try {
file.transferTo(destFile);
return RETURN.success("上传成功",0);
} catch (Exception e) {
LOG.error("文件上传出错",e);
return RETURN.fail("文件上传出错",0);
}
}
return RETURN.fail("上传失败",0);
}
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程之家。

原文地址：https://www.jb51.cc/js/30331.html

webuploader分片上传的实现代码前后端分离

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