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之前在网上找过很多相关资料，很多所谓的批量上传都是忽悠人的，真正的批量上传指的是用户一次性可以选择多个文件，然后上传是将所有选取的文件上传到服务器。java中真正可以实现批量上传的技术大致有两种：一种是通过flash；一种是通过applet；不过html5也可以支持批量拖选。两种方式有各自的优缺点，其中flash对于浏览器兼容性较好，基本可以满足市面上大众浏览器，缺点就是对于上传文件大小有限制，如果用户只需要上传一些图片或者文档文件的话，这种选择还是比较理想的；applet方式可以上传大文件，但是需要浏览器支持jdk并安装相关插件。
今天这个项目采用的是flash方式。整体设计思路：采用ext+swfupload进行上传界面显示，后台采用strust2来处理上传文件。
最终项目运行效果图如下：
前台jsp文件源码index.jsp：
<%@ page contentType="text/html;charset=gb2312" language="java"%>
<html>
<head>
<title>swf 上传</title>
<link rel="stylesheet" type="text/css"
href="js/css/ext-all.css" />
</head>
<body>
<script type="text/javascript" src="js/ext-base.js"></script>
<script type="text/javascript" src="js/ext-all.js"></script>
<script src="swf/swfupload.js" type="text/javascript"></script>
<script src="swf/swfupload.speed.js" type="text/javascript"></script>
<script src="swf/mode.js" type="text/javascript"></script>
<script src="swf/handlers.js" type="text/javascript"></script>
<script type="text/javascript" src="js/prototype/prototype.js"></script>
<script type="text/javascript" src="js/bramus/jsProgressBarHandler.js"></script>
<script type="text/javascript">
// 允许上传文件的全部大小
var limtallsize=50000000;
function UploadGrid()
{
var mine=this;
var states=[{v:-1,t:'等待'},{v:0,t:'就绪'},{v:1,t:'上传中'},{v:2,t:'停止'},{v:3,t:'成功'},{v:4,t:'失败'}];
function statesRender(v)
{
for(var i=0;i<states.length ;i++)
{
if(states[i].v==v)
{
return states[i].t;
}
}
}
function rateRender(value, metaData, record, rowIndex, cellIndex, store)
{
v=value?value:0;
//return "<table border='0' cellpadding='0' cellspacing='0' width='100%' height='100%'><tr><td bgcolor='#0000FF' height='100%' align='center' width='"+v+"%'><font color='white'>"+v+"%</font></td><td></td></tr></table>";
//setProgress(v);
return "<span id=\"element6_"+record.data.id+"\" rate=\""+v+"\"></span>";
}
var rn=new Ext.grid.RowNumberer();
var sm = new Ext.grid.CheckboxSelectionModel({singleSelect:false});
var cm = new Ext.grid.ColumnModel([
rn,
sm,
{header:'文件名称',dataIndex:'fileName',menuDisabled:true,width: 100},
{header:'大小' ,dataIndex:'fileSize',menuDisabled:true,width: 100},
{header:'进度' ,dataIndex:'rate',menuDisabled:true,width: 180,renderer:rateRender},
{header:'速度' ,dataIndex:'speed',menuDisabled:true},
{header:'状态' ,dataIndex:'state',menuDisabled:true,renderer:statesRender}
]);
this.ds = new Ext.data.Store({
proxy: new Ext.data.HttpProxy({url:'test!query.action',method:'post'}),
remoteSort:false,
reader: new Ext.data.JsonReader(
{totalProperty:'records',root:'root'},
[
{name: 'id'},
{name: 'fileName'},
{name: 'code'},
{name: 'fileSize'},
{name: 'rate'},
{name: 'speed'},
{name: 'state'}
])
});
var RC=Ext.data.Record.create([
{name: 'id', mapping: 'id'},
{name: 'code', mapping: 'code'},
{name: 'fileName', mapping: 'fileName'},
{name: 'fileSize', mapping: 'fileSize'},
{name: 'rate', mapping: 'rate'},
{name: 'speed', mapping: 'speed'}
]);
this.grid = new Ext.grid.GridPanel({
ds: mine.ds,
cm: cm,
sm: sm,
anchor:'100%',
loadMask:{msg:'数据加载中...'},
viewConfig:{forceFit:true},
height:300,
width :600,
tbar:[{id:'spanSWFUploadButton',text:'-'},'-'],
listeners:{
render:function()
{
// ytb-sep
var cmp=Ext.getCmp("spanSWFUploadButton");
var pcont=cmp.getEl().parent();
pcont.update("<span id='spanSWFUploadButton' class='blank'></span>");
var swfu = new SWFUpload({
upload_url : "upload.action",
post_params : {
"god" : "god","uid" : "u"
},
flash_url : "swf/swfupload.swf",
button_placeholder_id : "spanSWFUploadButton",
button_image_url : "swf/bt.png",
button_text_right_padding : 100,
button_width: 61,
button_height : 22,
button_action : SWFUpload.BUTTON_ACTION.SELECT_FILES,
// handler here
swfupload_loaded_handler : Handlers.swfUploadLoaded,
file_queued_handler : Handlers.fileQueued,
file_queue_error_handler : Handlers.fileQueueError,
upload_progress_handler : Handlers.uploadProgress,
upload_error_handler : Handlers.uploadError,
upload_success_handler : Handlers.uploadSuccess
});
swfu.grid=mine.grid;
swfu.ds=mine.ds;
swfu.RC=RC;
}
}
});
}
Ext.onReady(function(){
Ext.QuickTips.init();
Ext.form.Field.prototype.msgTarget = 'side';
Ext.BLANK_IMAGE_URL ='../../images/s.gif';
var grid=new UploadGrid();
var win = new Ext.Window({
title:'上传表格测试',
el:'panel',
width:620,
height:350,
closeAction:'hide',//关闭窗口时渐渐缩小
plain: true,
items:[grid.grid],
buttons: [{
text:'Submit',
disabled:true
},{
text: 'Close',
handler: function(){
win.hide();
}
}]
});
win.show(this);
})
</script>
<div id="panel"></div>
</body>
</html>
后台UploadAction.java:
package upload.action;
import java.io.File;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.struts2.ServletActionContext;
public class UploadAction
{
private File Filedata;
private String FiledataFileName;
private String FiledataContentType;
// 文件夹目录
private static final String basePath = "fileupload\\groupResource";
public String execute()
{
String s = (String)ServletActionContext.getRequest().getParameter("god");
String s2 = (String)ServletActionContext.getRequest().getParameter("uid");
if (Filedata != null && Filedata.length() > 0)
{
// 群组名字作为最后的文件夹
String groupFileName = "haoba";
String uploadPath = ServletActionContext.getServletContext()
.getRealPath(basePath+"\\"+groupFileName);
File path = new File(uploadPath);
if (!path.exists())
{
path.mkdirs();
}else{
//文件已存在
//FiledataFileName
}
String newPath = uploadPath +"\\"+FiledataFileName;
Filedata.renameTo(new File(newPath));
// 保存到数据库中的路径
String savePath = basePath+"\\"+groupFileName+"\\"+FiledataFileName;
}
return null;
}
// 上传文件
private String pathSplit(String timeStr, String o, String n)
{
StringBuffer sb = new StringBuffer();
for (String a : timeStr.split(o))
{
sb.append(a);
sb.append(n);
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
}
public static String format(Date date, String parttern)
{
DateFormat df = new SimpleDateFormat(parttern);
return df.format(date);
}
public File getFiledata()
{
return Filedata;
}
public void setFiledata(File filedata)
{
Filedata = filedata;
}
public String getFiledataFileName()
{
return FiledataFileName;
}
public void setFiledataFileName(String filedataFileName)
{
FiledataFileName = filedataFileName;
}
public String getFiledataContentType()
{
return FiledataContentType;
}
public void setFiledataContentType(String filedataContentType)
{
FiledataContentType = filedataContentType;
}
public static void main(String[] args) {
System.out.println(0.444<1);
}
}
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