1.前端

（1）依赖文件：

<link type="text/css" rel="stylesheet" href="~/Content/plupload\_2\_1\_2/jquery-ui.min.css" media="screen" />  
<link type="text/css" rel="stylesheet" href="~/Content/plupload\_2\_1\_2/jquery.ui.plupload/css/jquery.ui.plupload.css" media="screen" />  
<script type="text/javascript" src="~/Content/plupload\_2\_1\_2/jquery.js" charset="UTF-8"></script>  
<script type="text/javascript" src="~/Content/plupload\_2\_1\_2/jquery-ui.min.js" charset="UTF-8"></script>  
<script type="text/javascript" src="~/Content/plupload\_2\_1\_2/plupload.full.min.js" charset="UTF-8"></script>  
<script type="text/javascript" src="~/Content/plupload\_2\_1\_2/jquery.ui.plupload/jquery.ui.plupload.min.js" ></script>  
<script type="text/javascript" src="~/Content/plupload\_2\_1\_2/zh\_CN.js" charset="UTF-8"></script>

（2）HTML

<form id="uploader">  
    <input type="text" name="filename" value="" />  
</form>

（3）js

2.后台

　　后台可以使用FileInputStream的构造方法追加文件内容。plupload使用“multipart/form-data”这种表单上传文件，其中每一个分块会发出一次请求，表单中有两个字段，分别是“chunk”和“chunks”，其中“chunk”是当前正在处理的文件分块的序号（从0开始计数），而“chunks”则是文件的分块总数。

（1）.net

　　asp.net MVC【有bug】

///

/// 文件上传 ///

///
public JsonResult plupload(string name)
{
string msg = string.Empty;
string strchunk = Request["chunk"];
string strchunks = Request["chunks"];
int chunk = ;
int chunks = ;
int.TryParse(strchunk, out chunk);
int.TryParse(strchunks, out chunks);

foreach (string upload in Request.Files)  
{  
    if (upload != null && upload.Trim() != "")  
    {  
        string path = AppDomain.CurrentDomain.BaseDirectory + "Temp\\\\";  
        if (!Directory.Exists(path))  
        {  
            Directory.CreateDirectory(path);  
        }  
        System.Web.HttpPostedFileBase postedFile = Request.Files\[upload\];  
        string filename1 = Path.GetFileName(postedFile.FileName);  
        string filename = name;

        string newFileName = filename;  
        if (chunks>)  
        {  
            newFileName = chunk + "\_" + filename;  
        }  
        string fileNamePath = path + newFileName;  
        postedFile.SaveAs(fileNamePath);

        if (chunks> && chunk +  == chunks)  
        {  
            using (FileStream fsw = new FileStream(path + filename, FileMode.Create, FileAccess.Write))  
            {  
                BinaryWriter bw = new BinaryWriter(fsw);  
                // 遍历文件合并  
                for (int i = ; i < chunks; i++)  
                {  
                    bw.Write(System.IO.File.ReadAllBytes(path + i.ToString() + "\_" + filename));  
                    bw.Flush();  
                }  
            }

        }

    }  
}  
return Json(new { jsonrpc = "2.0", result = "", id = "id" });

}

（2）servlet

config.properties:

uploadPath=/upload/images

package cn.getword.servlet;

import com.alibaba.fastjson.JSON;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.*;

@WebServlet(name = "FileUploadServlet", urlPatterns = {"/upload/plupload.do"})
public class FileUploadServlet extends HttpServlet {
String uploadPath;
private static final ResourceBundle bundle = ResourceBundle.getBundle( "config" );

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {  
    response.setCharacterEncoding( "UTF-8" );  
    Integer chunk = null; /\* 分割块数 \*/  
    Integer chunks = null; /\* 总分割数 \*/  
    String tempFileName = null; /\* 临时文件名 \*/  
    String newFileName = null; /\* 最后合并后的新文件名 \*/  
    BufferedOutputStream    outputStream    = null;

    /\* System.out.println(FileUtils.getTempDirectoryPath()); \*/  
    uploadPath = request.getServletContext().getRealPath( bundle.getString( "uploadPath" ) );  
    File up = new File( uploadPath );  
    if ( !up.exists() )  
    {  
        up.mkdir();  
    }

    if ( ServletFileUpload.isMultipartContent( request ) )  
    {  
        try {  
            DiskFileItemFactory factory = new DiskFileItemFactory();  
            factory.setSizeThreshold( 1024 );  
            /\* factory.setRepository(new File(repositoryPath));// 设置临时目录 \*/  
            ServletFileUpload upload = new ServletFileUpload( factory );  
            upload.setHeaderEncoding( "UTF-8" );  
            /\* upload.setSizeMax(5 \* 1024 \* 1024);// 设置附件最大大小，超过这个大小上传会不成功 \*/  
            List<FileItem> items = upload.parseRequest( request );  
            for ( FileItem item : items ){  
                if ( item.isFormField() ) /\* 是文本域 \*/  
                {  
                    if ( item.getFieldName().equals( "name" ) )  
                    {  
                        tempFileName = item.getString();  
                        /\* System.out.println("临时文件名：" + tempFileName); \*/  
                    } else if ( item.getFieldName().equals( "chunk" ) )  
                    {  
                        chunk = Integer.parseInt( item.getString() );  
                        /\* System.out.println("当前文件块：" + (chunk + 1)); \*/  
                    } else if ( item.getFieldName().equals( "chunks" ) )  
                    {  
                        chunks = Integer.parseInt( item.getString() );  
                        /\* System.out.println("文件总分块：" + chunks); \*/  
                    }  
                } else { /\* 如果是文件类型 \*/  
                    if ( tempFileName != null )  
                    {  
                        String chunkName = tempFileName;  
                        if ( chunk != null )  
                        {  
                            chunkName = chunk + "\_" + tempFileName;  
                        }  
                        File savedFile = new File( uploadPath, chunkName );  
                        item.write( savedFile );  
                    }  
                }  
            }

            // UUID+'.'+后缀名  
            newFileName = UUID.randomUUID().toString().replace( "-", "" )  
                    .concat( "." )  
                    .concat( FilenameUtils.getExtension( tempFileName ) );  
            if ( chunk != null && chunk + 1 == chunks )  
            {  
                outputStream = new BufferedOutputStream(  
                        new FileOutputStream( new File( uploadPath, newFileName ) ) );  
                /\* 遍历文件合并 \*/  
                for ( int i = 0; i < chunks; i++ )  
                {  
                    File tempFile = new File( uploadPath, i + "\_" + tempFileName );  
                    byte\[\] bytes = FileUtils.readFileToByteArray( tempFile );  
                    outputStream.write( bytes );  
                    outputStream.flush();  
                    tempFile.delete();  
                }  
                outputStream.flush();  
            }  
            Map<String, Object> m = new HashMap<String, Object>();  
            m.put( "status", true );  
            m.put( "fileUrl", bundle.getString( "uploadPath" ) + "/"  
                    + newFileName );  
            response.getWriter().write( JSON.toJSONString( m ) );  
        } catch ( FileUploadException e ) {  
            e.printStackTrace();  
            Map<String, Object> m = new HashMap<String, Object>();  
            m.put( "status", false );  
            response.getWriter().write( JSON.toJSONString( m ) );  
        } catch ( Exception e ) {  
            e.printStackTrace();  
            Map<String, Object> m = new HashMap<String, Object>();  
            m.put( "status", false );  
            response.getWriter().write( JSON.toJSONString( m ) );  
        } finally {  
            try {  
                if ( outputStream != null )  
                    outputStream.close();  
            } catch ( IOException e ) {  
                e.printStackTrace();  
            }  
        }  
    }

}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {  
    request.getRequestDispatcher("/WEB-INF/views/student/uploadFile.jsp").forward(request, response);  
}  

}

servlet

　　注意：

> request.getServletContext().getRealPath(virtualPath); 将虚拟路径转化成物理路径。

> ResourceBundle bundle = ResourceBundle.getBundle( "config" );
读取src下的config.properties文件。例如：file.config对应的文件为file包下config.properties文件