Ext4.0 上传文件实例

js html页面:
<HTML>
 <HEAD>
  <TITLE>Ext.form.field.File示例</TITLE>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <link rel="stylesheet" type="text/css" href="js/extjs/resources/css/ext-all.css" />
  <script type="text/javascript" src="js/extjs/ext-all.js"></script>
  <script type="text/javascript" src="js/extjs/locale/ext-lang-zh_CN.js"></script>
  <script type="text/javascript">
	Ext.onReady(function(){
		Ext.QuickTips.init();
		var uploadForm = Ext.create('Ext.form.Panel',{
			title:'Ext.form.field.File示例',
			bodyStyle:'padding:5 5 5 5',//表单边距
			frame : true,
			height:100,
			width:300,
			renderTo :'form',
			defaults:{//统一设置表单字段默认属性
				labelSeparator :':',//分隔符
				labelWidth : 50,//标签宽度
				width : 150,//字段宽度
				allowBlank : false,//是否允许为空
				labelAlign : 'left',//标签对齐方式
				msgTarget :'side'   //在字段的右边显示一个提示信息
			},
			items:[{
		        xtype: 'filefield',
		        name: 'photo',
		        fieldLabel: '照片',
		        anchor: '100%',
		        buttonText: '选择照片...'
		    }],
		    buttons: [{
		        text: '上传文件',
		        handler: function() {
		            var form = uploadForm.getForm();
		            if(form.isValid()){
		                form.submit({
		                    url: 'uploadServer.jsp',
		                    waitMsg: '正在上传照片文件请稍候...',
		                    success: function(fp, o) {
		                        Ext.Msg.alert('提示信息', '您的照片文件 "' + o.result.file + '"已经成功上传。');
		                    }
		                });
		            }
		        }
		    }]
		});
	});
  </script>
 </HEAD>
 <BODY STYLE="margin: 10px">
 	 <div id='form'></div>
 </BODY>
</HTML>



jsp后台代码:
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.FileItem"%>
<%@ page import="java.io.File"%>
<%
DiskFileUpload upload = new DiskFileUpload();
upload.setHeaderEncoding("utf8");
java.util.List items = upload.parseRequest(request);
java.util.ListIterator listIterator = items.listIterator();
String fileName = "";
while(listIterator.hasNext()){
	FileItem item = (FileItem)listIterator.next();
	if(!item.isFormField()){
		fileName = item.getName();
		fileName = fileName.substring(fileName.lastIndexOf("\\")+1);//从全路径中提取文件名
	}
	File newFile = new File("c:/" + fileName); 

	try { 
		item.write(newFile); 
	} catch (Exception e) { 
		e.printStackTrace(); 
	} 

	
}
String msg = "{success:true,file:'"+fileName+"'}";
response.getWriter().write(msg);
%>

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