flex前端代码:

<?xml version="1.0" encoding="utf-8"?>
<s:BorderContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
   xmlns:s="library://ns.adobe.com/flex/spark"
    xmlns:mx="library://ns.adobe.com/flex/mx"
    width="100%" height="100%" xmlns:component="com.boco.mis.nwcfgdm.component.*"
    creationComplete="init()">

<fx:Script>
<![CDATA[

    import com.adobe.net.URI;

    private var file: FileReference; 

    private function init(): void{
        Security.allowDomain("*");
        file = new FileReference();
        file.addEventListener(ProgressEvent.PROGRESS, onProgress);
        file.addEventListener(Event.SELECT, onSelect);
    }

    private function upload(): void{
        file.browse();
    }
    private function onSelect(e: Event): void{
        Alert.show("上传 " + file.name + " (共 "+Math.round(file.size)+" 字节)?",
        "确认上传",
        Alert.YES|Alert.NO,
        null,
        proceedWithUpload);
    }

    private function proceedWithUpload(e: CloseEvent): void{
        if (e.detail == Alert.YES){
      //采用http向后台发送请求
        var uri:URI = new URI(Application.application.url);

        //获得服务端的ip
        var authority:String = uri.authority;

        //获得服务端的端口号

        var port:String = uri.port;
        var request: URLRequest = new URLRequest("http://"+authority+":"+port+"/nwcfgdm/fileUploadServlet");
        try {
          file.upload(request);
        } catch (error:Error) {
          trace("上传失败");
        }

    }
}
//显示进度条
      private function onProgress(e: ProgressEvent): void
      {
        var u:Upload = Upload(PopUpManager.createPopUp(this.parentApplication.parent,Upload,true));
        PopUpManager.centerPopUp(u);
        var proc: uint = e.bytesLoaded / e.bytesTotal * 100;
        u.bar.setProgress(proc, 100);
        u.bar.label= "当前进度: " + " " + proc + "%";
        if(proc == 100){
          u.lbProgress.text="上传完成,正在导入数据...";
          var importDateEvt:ImportDataEvent = new ImportDataEvent();
          CairngormEventDispatcher.getInstance().dispatchEvent(importDateEvt);
        }
}

java代码部分:(是一个servelt)

  

public class FileUploadServlet extends HttpServlet {

  //这里我采用log的形式记录异常信息

    private static final Logger log = LoggerFactory
    .getLogger(NwcfgdmService.class);

    //自定义路径,盘符建议用

     private String uploadPath ="D:"+File.separator+"opt"+File.separator+"BOCO"+File.separator ";

    private static final long serialVersionUID = 1L;

    private int maxPostSize = 100 * 1024 * 1024;

    public FileUploadServlet() {
      super();
    }

    public void destroy() {
      super.destroy();
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

       //防止标题中还有中文字符是出现乱码
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html; charset=UTF-8");
        DiskFileItemFactory factory = new DiskFileItemFactory();
        factory.setSizeThreshold(4096);
        ServletFileUpload upload = new ServletFileUpload(factory);
        upload.setSizeMax(maxPostSize);
        try
        {
          List fileItems = upload.parseRequest(request);
          Iterator iter = fileItems.iterator();
          while (iter.hasNext())
          {
          FileItem item = (FileItem) iter.next();
            if (!item.isFormField())
          {
            String name = item.getName();
            // System.out.println(name);
           try
          {
            item.write(new File(uploadPath+name ));
          }
          catch (Exception e)
          {
            e.printStackTrace();
            log.error("书写文件出现异常",e);
          }
        }
      }
    }
      catch (FileUploadException e)
    {
      e.printStackTrace();
      log.error("上传文件出现异常",e);

    }
}

      public void doPost(HttpServletRequest request, HttpServletResponse response)
              throws ServletException, IOException {
        doGet(request, response);
       }

      public void init() throws ServletException {
        // Put your code here
      }

}

web.xml中的配置:

<servlet>
  <servlet-name>FileUploadServlet</servlet-name>
  <servlet-class>nwcfgdm.FileUploadServlet</servlet-class>
</servlet>
<servlet-mapping>
  <servlet-name>FileUploadServlet</servlet-name>
  <url-pattern>/fileUploadServlet</url-pattern>
</servlet-mapping>

 

posted on 2015-11-20 14:28  田梦伟  阅读(207)  评论(0编辑  收藏  举报