java web 简单图片上传

<%@ page contentType="text/html;charset=utf-8"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<%@ taglib prefix="t" tagdir="/WEB-INF/tags" %>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<title>信息公告</title>

<link href="<%=basePath %>css/base.css" type="text/css" rel="stylesheet"/>

<script type="text/javascript" src="<%=basePath%>js/jquery.min.js"></script>

<link href="<%=basePath %>js/validate/jquery.validate.css" type="text/css" rel="stylesheet"/>

<script src="<%=basePath %>js/validate/jquery.validate.js" type="text/javascript"></script>

<script src="<%=basePath %>js/validate/messages_cn.js" type="text/javascript"></script>

<link href="<%=basePath %>js/ajaxfileupload/ajaxfileupload.css" type="text/css" rel="stylesheet" />

<script type="text/javascript" src="<%=basePath %>js/ajaxfileupload/ajaxfileupload.js"></script>

<script>

var P = window.parent, E = P.setDialog();

var valida;

$(document).ready(function() {

valida=$("#inputForm").validate({

rules: {

"announcement.fileType": {

required:true

},

"announcement.title": {

required:true

}

},

messages: {}

});

});

function PreviewImg(imgFile){     

   var imgDiv = document.getElementById("photo"); 

   imgFile.select();

   var realpath = document.selection.createRange().text;

   imgDiv.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod = scale)";

   imgDiv.filters("DXImageTransform.Microsoft.AlphaImageLoader").src = realpath;

</script>

</head>

<body>

<form id="inputForm">

<table>

<tr>

<td style="background-color:#CDEAFA;width:30%;">发布类型:</td>

<td><select id="announcementType" name="announcement.fileType" >

<option value="" >请选择</option>

<option value="1" >物业公告</option>

<option value="2" >健康消息</option>

<option value="3" >娱乐消息</option>

<option value="4" >购物消息</option>

<option value="5" >餐饮消息</option>

<option value="6" >旅游消息</option>

</select></td>

<td rowspan="4"><div id="photo" style="width:150px;height:150px;background:url(<%=basePath %>image/nophoto.jpg);"></div></td>

</tr>

<tr>

<td style="background-color:#CDEAFA">标题:</td>

<td><input id="title" type="text" name="announcement.title"  maxlength="15" size="30"/></td>

</tr>

<tr>

<td style="background-color:#CDEAFA">图片:</td>

<td><img id="loading" src="<%=basePath %>js/ajaxfileupload/loading.gif" style="display:none;" />

<input  onchange="javascript:PreviewImg(this);"  id="myFile" type="file" size="42" name="myFile"  style="vertical-align: middle; border: 1px solid #86888B;font: 12px Arial,Helvetica,sans-serif;" />

<br/><span style="color:#32CD32">建议图片大小最大为100kb,尺寸为200*200!</span>

</td>

</tr>

<tr>

<td style="background-color:#CDEAFA">咨询电话:</td>

<td><input id="telNum" type="text" name="announcement.telNum"  maxlength="15" size="30"/></td>

</tr>

<tr>

<td style="background-color:#CDEAFA">公告信息:</td>

<td colspan="2"><textarea id="announcement.desc"  rows="8" cols="60" onpropertychange="if(this.scrollHeight>40) this.style.posHeight=this.scrollHeight+5"></textarea>

</td>

</tr>

</table>

<div align="right" style="margin: 1.5em;"  width="10%">

<input class="btn" type="button" value="保存" onclick="save();"/>

&nbsp;<input class="btn" type="reset" value="重置"/>

</div>

</form>

</body>

</html>

<script type="text/javascript">

var fields;

function save(){

var announcementType = document.getElementById("announcementType").value;

var title = document.getElementById("title").value;

if(announcementType==""){

alert("请选择发布信息类型");

return false;

}

if(title==""){

alert("请输入信息标题");

return false;

}

if(title.length>100){

alert("信息标题过长");

return false;

}

if(document.getElementById('announcement.desc').value==""){

alert("请输入信息内容");

return false;

}

if(document.getElementById('announcement.desc').value.length>500){

alert("信息内容过长");

return false;

}

if(checkImg())

{

fields = $('#inputForm').serialize();

var desc =document.getElementById('announcement.desc').value.replace(/"/gm,"&#34;");

$.ajaxFileUpload({

url:'<%=basePath %>announcement/add.do?'+fields,

secureuri:false,

fileElementId:'myFile',

dataType: 'json',

data:{'announcement.desc':desc,'announcement.fileType':announcementType},

complete: function (data, status)

{

alert(data["responseText"]);

if("保存成功!"==data["responseText"]){

top.frames["aaa"].frames["main"].document.forms[0].submit();

}

}

});

}

}

function checkImg()

{

return true;//先不检查图片尺寸

var image = new Image();

image.src =document.getElementById("myFile").value;

if(GetImageWidth(image)==0||(GetImageWidth(image)==200&&GetImageHeight(image)==200))

{

return true;

}

else

{

alert("请检查图片尺寸是否为200*200!");

return false;

}

}

//js获取原始图片大小

function GetImageWidth(oImage)

{

var OriginImage=new Image();

OriginImage.src=oImage.src;

return OriginImage.width;

}

function GetImageHeight(oImage)

{

var OriginImage=new Image();

OriginImage.src=oImage.src;

return OriginImage.height;

}

</script>

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