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>