Javascript使用uploadify来实现多文件上传

(编辑：jimmy 日期: 2024/11/19 浏览：3 次 )
使用uploadify来实现文件上传能够客户端判断文件大小、控制文件上传的类型、实现多文件上传、显示进度条等功能，方便易用，兼容性较好。
本例是把dwz中整合uploadify功能抽取出来的，可以进行单独使用，不一定要遭dwz中才能使用，本例只是为了测试，所以使用静态页面进行测试：
话不多说，代码敬上：

2，html页面的代码
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
<head> 
<title>MyHtml.html</title> 
<meta http-equiv="content-type" content="text/html; charset=UTF-8"> 
<link href="resources/dwz/uploadify/css/uploadify.css" rel="stylesheet" type="text/css" media="screen" /> 
<script src="/UploadFiles/2021-04-02/jquery-1.7.2.js">

3，上传的servlet代码




package uploadFile; 
 
import java.io.File; 
import java.io.IOException; 
import java.util.Iterator; 
import java.util.List; 
 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
 
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; 
 
public class UploadFile extends HttpServlet { 
 
  @Override 
  protected void service(HttpServletRequest request, HttpServletResponse response) 
      throws ServletException, IOException { 
    super.service(request, response); 
  } 
   
   
  @Override 
  protected void doPost(HttpServletRequest req, HttpServletResponse resp) 
      throws ServletException, IOException { 
    //临时目录 
    String basePath = req.getServletContext().getRealPath("upload"); 
    String tempDir = "temp"; 
     
    File tempFile = new File(basePath + File.separator +tempDir); 
    if (!tempFile.exists()) { 
      tempFile.mkdir(); 
    } 
     
    DiskFileItemFactory dfc = new DiskFileItemFactory(); 
    dfc.setSizeThreshold(1*1024*1024);//设置临界值 
    dfc.setRepository(tempFile);//设置临时上传目录 
     
    ServletFileUpload upload = new ServletFileUpload(dfc); 
    upload.setHeaderEncoding("UTF-8");//设置编码 
    // 设置文件最大值,这里设置5Mb,5*1024*1024; 
    upload.setSizeMax(5 * 1024 * 1024); 
     
    try { 
      List fileList = upload.parseRequest(req); 
      Iterator<FileItem> iterator = fileList.iterator(); 
      while (iterator.hasNext()) { 
        FileItem item = iterator.next(); 
        String fileName = item.getName();//得到文件名 
        if (fileName != null) { 
        //System.out.println(fileName); 
        //System.out.println(item.getSize()); 
        File sourceFile = new File(basePath+File.separator+fileName); 
        item.write(sourceFile); 
        } 
      } 
    } catch (FileUploadException e) { 
      e.printStackTrace(); 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
     
    //resp.getWriter().print("上传成功！");  
  } 
   
   
  @Override 
  protected void doGet(HttpServletRequest req, HttpServletResponse resp) 
      throws ServletException, IOException { 
    super.doPost(req, resp); 
  } 
} 



4，web.xml配置




<servlet> 
 <servlet-name>upLoadify</servlet-name> 
 <servlet-class>uploadFile.UploadFile</servlet-class> 
</servlet> 
<servlet-mapping> 
 <servlet-name>upLoadify</servlet-name> 
 <url-pattern>/servlet/uploadify.do</url-pattern> 
</servlet-mapping> 



5，uploadify的提示信息是英文的，为了显示中文的提示信息，将其错误提示方法进行重新，新建errorCode.js放入在resource/dwz/uploadify/scripts文件夹下面，并在页面进行导入这个js,js代码如下：




var uploadify_onSelectError = function(file, errorCode, errorMsg) { 
    var msgText = "上传失败\n"; 
    switch (errorCode) { 
      case SWFUpload.QUEUE_ERROR.QUEUE_LIMIT_EXCEEDED: 
        //this.queueData.errorMsg = "每次最多上传 " + this.settings.queueSizeLimit + "个文件"; 
        msgText += "每次最多上传 " + this.settings.queueSizeLimit + "个文件"; 
        break; 
      case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT: 
        msgText += "文件大小超过限制( " + this.settings.fileSizeLimit + " )"; 
        break; 
      case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE: 
        msgText += "文件大小为0"; 
        break; 
      case SWFUpload.QUEUE_ERROR.INVALID_FILETYPE: 
        msgText += "文件格式不正确，仅限 " + this.settings.fileTypeExts; 
        break; 
      default: 
        msgText += "错误代码：" + errorCode + "\n" + errorMsg; 
    } 
    alert(msgText); 
  }; 
  
var uploadify_onUploadError = function(file, errorCode, errorMsg, errorString) { 
    // 手工取消不弹出提示 
    if (errorCode == SWFUpload.UPLOAD_ERROR.FILE_CANCELLED 
        || errorCode == SWFUpload.UPLOAD_ERROR.UPLOAD_STOPPED) { 
      return; 
    } 
    var msgText = "上传失败\n"; 
    switch (errorCode) { 
      case SWFUpload.UPLOAD_ERROR.HTTP_ERROR: 
        msgText += "HTTP 错误\n" + errorMsg; 
        break; 
      case SWFUpload.UPLOAD_ERROR.MISSING_UPLOAD_URL: 
        msgText += "上传文件丢失，请重新上传"; 
        break; 
      case SWFUpload.UPLOAD_ERROR.IO_ERROR: 
        msgText += "IO错误"; 
        break; 
      case SWFUpload.UPLOAD_ERROR.SECURITY_ERROR: 
        msgText += "安全性错误\n" + errorMsg; 
        break; 
      case SWFUpload.UPLOAD_ERROR.UPLOAD_LIMIT_EXCEEDED: 
        msgText += "每次最多上传 " + this.settings.uploadLimit + "个"; 
        break; 
      case SWFUpload.UPLOAD_ERROR.UPLOAD_FAILED: 
        msgText += errorMsg; 
        break; 
      case SWFUpload.UPLOAD_ERROR.SPECIFIED_FILE_ID_NOT_FOUND: 
        msgText += "找不到指定文件，请重新操作"; 
        break; 
      case SWFUpload.UPLOAD_ERROR.FILE_VALIDATION_FAILED: 
        msgText += "参数错误"; 
        break; 
      default: 
        msgText += "文件:" + file.name + "\n错误码:" + errorCode + "\n" 
            + errorMsg + "\n" + errorString; 
    } 
    alert(msgText); 
  } 
  // return parameters; 
//} 
  
  
var uploadify_onUploadSuccess = function(file, data, response) { 
  alert(file.name + "\n\n上传成功"); 
}; 



收工！


原文链接：http://blog.csdn.net/hwt_211/article/details/36888763


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