前台用Flex,后台用java,不知道有什么好的解决方案,
希望大虾们踊跃发言!
希望大虾们踊跃发言!
解决方案 »
- 请高手指教servlet
- Hibernate多对多更新问题
- 首次发帖,servlet菜鸟问题,求高手点拨一下.
- 关于登录界面的验证码问题~
- Hibernate 查询的问题?
- 老手们,小弟求一个下载tomcat快点的地址!
- 之前说的jboss收费文档有人收到吗?麻烦给我转发一份。100分奉上
- 在事件监听器类中如何获得其调用对象?在线等待
- mysql出现乱码怎么解决
- 求线程池案例(ThreadPoolExecutor)
- 请问大家用Spring 对 Hibernate 的事物操作都采取什么方法?
- Error : Invalid path, \bin\javac.exe -classpath "C:\Program Files\Xinox Software\JCreatorV3LE\MyProj
所以可以使用socket传文件。
给个例子吧,
http://tech.ddvip.com/2009-02/1234862846109044.html考虑网络因素,大文件应该实现断点续传。
但是曾经有人告诉过我
大文件上传的话 应该采取断点续传ftp
还有一种方式就是用flash
还有ftp你到网上去搜吧 很多实例。。
具体的我也没有用过
但是原来上网上搜过 很多的 你自己搜索一下
是有实例的。。
大家提出的建议都不错,但flex这一块,这方面的资料确实不多,用ftp当然不错,但具体操作,事例。
还希望大虾们提供,跑的起来的事例代码。
小弟我不胜感激!
附:
这么大的文件传上去干什么?
JAVA处理2G的文件不太合理,如果是文本文件需要处理,建议写SH利用操作系统命令或将其用数据库客户端命令(根据数据库而定)导入表中利用SQL处理,不然你的WEB应用是很不稳定的,且内存不够用(64位机器还好点);如果是二进制文件。。
不需要做sql处理,只是一个文件上传!
从本地上传到服务器就可以了。
安装虚拟机,是在服务器端安装。
B/S,页面全是用flex来写的!
所有上传也得用flex来做,当然了,也可以结合java一起做!
Flex页面代码-----------------FileUpload.mxml----------------
<?xml version="1.0" encoding="utf-8"?><AbiCloudPopUp
xmlns="net.undf.ideal.view.general.*"
xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:componentsMonitor="net.undf.ideal.view.monitor.components.*"
titleText="@Resource(bundle='Monitor', key='FILE_UPLOAD')"
xmlns:utils="net.undf.ideal.utils.*" creationComplete="init();">
<!--这个是我自定义的组件-->
<mx:Script>
<![CDATA[
import flash.net.FileReference;
import mx.controls.Alert;
import mx.events.CloseEvent;
import flash.events.*;
import flash.net.navigateToURL;
import flash.net.URLRequest;
import flash.net.URLRequestMethod;
import flash.net.URLVariables;
private var file:FileReference ;
private function init(): void{
Security.allowDomain("*");
file = new FileReference();
file.addEventListener(ProgressEvent.PROGRESS, onProgress);
file.addEventListener(Event.SELECT, onSelect);
file.addEventListener(Event.COMPLETE, completeHandle);
}
private function completeHandle(event:Event):void{
Alert.show("恭喜你,上传成功");
}
private function upload(): void {
var imageTypes:FileFilter = new FileFilter("Images (*.jpg, *.jpeg, *.png)", "*.jpg;*.jpeg;*.png");
var allTypes:Array = new Array(imageTypes);
file.browse(allTypes);
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 onProgress(e: ProgressEvent): void{
lbProgress.text = " 已上传 " + e.bytesLoaded
+ " 字节,共 " + e.bytesTotal + " 字节";
var proc: uint = e.bytesLoaded / e.bytesTotal * 100;
bar.setProgress(proc, 100);
bar.label= "当前进度: " + " " + proc + "%";
}
private function proceedWithUpload(e: CloseEvent): void{
var url:String="http://localhost:8083/Cloud-Client/FileUploaded";
if (e.detail == Alert.YES){
var request: URLRequest = new URLRequest(url);
var variables:URLVariables = new URLVariables();
variables.exampleSessionId = new Date().getTime();
variables.exampleUserLabel = "guest";
request.data = variables;
request.method=URLRequestMethod.POST;
try {
file.upload(request);
} catch (error:Error) {
trace("上传失败");
}
}
}
//关闭窗口
private function onClickCloseButton():void
{
dispatchEvent(new Event("closeFileUpload"));
}
]]>
</mx:Script>
<mx:VBox width="300" height="150">
<mx:Label id="lbProgress" text="上传"/>
<mx:ProgressBar id="bar" labelPlacement="bottom" themeColor="#F20D7A"
minimum="0" visible="true" maximum="100" label="当前进度: 0%"
direction="right" mode="manual" width="200"/>
<mx:HBox>
<mx:Button label="浏览" click="file.browse();"/>
<mx:Button label="上传" click="upload();"/>
</mx:HBox> <mx:HBox width="100%" horizontalAlign="center" paddingBottom="5" paddingLeft="0" paddingTop="10" paddingRight="0">
<mx:Button id="closeButton"
height="20" paddingRight="10"
label="@Resource(bundle='Common', key='BUTTON_CLOSE')"
styleName="AlternativeButton"
click="onClickCloseButton()" />
</mx:HBox>
</mx:VBox>
</AbiCloudPopUp>java--------------FileUploaded.java----
package upload;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
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 FileUploaded extends HttpServlet{
private String uploadPath = "d:\\uploadFile\\";
private int maxPostSize = 1000 * 1024 * 1024;
public FileUploaded() {
super();
}
public void destroy() {
super.destroy();
}
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("Access !");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
//保存文件到服务器中
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(40960);
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();
}
}
}
} catch (FileUploadException e) {
e.printStackTrace();
System.out.println(e.getMessage() + "结束");
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.processRequest(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.processRequest(request, response);
}
public String getServletInfo() {
return "Short description";
}
}
web.xml--------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>server</display-name>
<servlet>
<servlet-name>FileUploaded</servlet-name>
<servlet-class>upload.FileUploaded</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>FileUploaded</servlet-name>
<url-pattern>/FileUploaded</url-pattern>
</servlet-mapping>
</web-app>
FTP方式则不会。另外现在网上已经有一些公司开发出了比较成熟的FTP文件上传控件,用户体验也不错。你可以看一下QQ邮箱中的大附件中传功能。有断点续传。