jquery的ajaxSubmit()异步上传图片并保存表单数据演示代码

(jsp需要引入：jquery-1.9.0.js、jquery.form.js ) ，jsp页面使用的是bootstrap制作的，看不懂的标签不用管，form表单大同小异。代码比较简陋，只是为了演示使用ajaxSubmit异步上传图片及保存数据，请海含！
(参考文献：http://www.jb51.net/shouce/jquery/jquery_api/Plugins/Form/ajaxSubmit.html)
一：web (add.jsp)

复制代码代码如下:

<%@page import="com.fingerknow.project.vo.UserInformation"%> 
<%@ page language="java" contentType="text/html; charset=utf-8" 
pageEncoding="utf-8"%> 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> 
<c:set var="ctx" value="${pageContext.request.contextPath }" /> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 
<title>注册商圈</title> 
<link href="${ctx}/bootstrap/css/bootstrap.css" rel="stylesheet"> 
<link href="${ctx}/bootstrap/css/bootstrap-responsive.css" rel="stylesheet"> 
<link rel="stylesheet" href="${ctx}/css/bootstrap-responsive.min.css" /> 
<link rel="stylesheet" href="${ctx}/css/jquery-ui.css" /> 
<link rel="stylesheet" href="${ctx}/css/uniform.css" /> 
<link rel="stylesheet" href="${ctx}/css/select2.css" /> 
<link rel="stylesheet" href="${ctx}/css/unicorn.main.css" /> 
<link rel="stylesheet" href="${ctx}/css/common.css" /> 
<% 
response.setCharacterEncoding("utf-8");//这个是设置编码方式 
response.setContentType("text/html");//这个是设置网页类型，为文本代码 
UserInformation user=null; 
String username=""; 
Integer userId=null; 
if(request.getSession().getAttribute("userinfo")!=null){ 
user=(UserInformation)request.getSession().getAttribute("userinfo"); 
username=user.getUsername(); 
userId=user.getUserId(); 
}else{ 
username="请<a href='http://localhost:8080/fk/test/login.jsp'>登录</a>"; 
} 
%> 
</head> 
<body> 
<div class="header-inner"> 
<div class="container"> 
<div class="row"> 
<div class=" page-header clearfix"> 
<div class="span11"> <h1 class="page-header" style="background:black;"><img alt="fingerknow" src="${ctx}/images/fingerknow.png" width=""><small>中文最大的购物经验分享平台</small></h1> </div> 
<div class="span1"> <a href="#">首页</a> |<a href="#">帮助</a></div> 
</div> 
</div> 
</div> 
</div> 
<div class="container" id="businessEname_div"> 
<div class="row"> 
<div class="span1"></div> 
<div class="span10"> 
<div class="widget-box"> 
<div class="widget-title"> 
<span class="icon"> 
<i class="icon-align-justify"></i> 
</span> 
<h5>注册商圈</h5> 
</div> 

<div class="widget-content nopadding"> 
<form class="form-horizontal" method="post" action="${ctx}/upload/upload.do" id="uploadImgForm" enctype="multipart/form-data"> 
<div class="control-group" style="border: 0px solid red;"> 
<label class="control-label">*商圈名：</label> 
<div class="controls" style="width: 350px;border: 0px solid red;vertical-align: middle;" > 
<input type="text" name="businessName" maxlength="20" id="businessName" width="200px;"/> 
<input type="text" name="userId" maxlength="20" value="<%=userId%>" id="userId" width="200px;"/> 
<div id="businessName_error" ></div> 
</div> 

</div> 
<div class="control-group"> 
<label class="control-label">*商圈logo：</label> 
<div class="controls" style="width:350px;"> 
<input type="file" name="file" id="file"> 
<div id="file_error"></div> 
</div> 
</div> 
<div class="control-group"> 
<label class="control-label">*商圈英文名：</label> 
<div class="controls" style="width: 350px;"> 
<input type="text" name="businessEname" id="businessEname" /> 
<div id="businessEname_error"></div> 
</div> 
</div> 
<div class="form-actions"> 
<button type="button" id="imgSave" value="Validate" class="btn btn-primary">提交注册</button> 
</div> 
</form> 
</div> 
</div> 
</div> 
<div class="span1"></div> 
</div> 
</div> 
<div class="container" style="background:white;"> 
<div class="row"> 
<div class="span12" style="margin-left: 25%;"> 
<p>© 2012 fingerknow.com <span>|</span><a href="#" rel="nofollow" >隐私条款</a><span>|</span><a href="#" rel="nofollow">服务条款</a><span>|</span><a href="#" rel="nofollow" >粤ICP备12003619号-1</a></p> 
</div> 
</div> 
</div> 
<script src="${ctx}/js/jquery-1.9.0.js"></script> 
<script src="${ctx}/js/jquery.form.js"></script> 
<script type="text/javascript"> 
/** 
* 
* V1.0 
*/ 
$(document).ready(function() { 

//验证商圈名 
$("#businessName").blur(function(){ 
var businessName=$("#businessName").val(); 
if(businessName!=""){ 
$("#businessName_error").html("<img src='${ctx}/images/success_img.gif' style='width:15px;height:15px;'/>"); 
}else{ 
$("#businessName_error").attr("class","error_div").html("<img src='${ctx}/images/error_img2.gif' style='width:15px;height:15px;'/>"+"商圈名不能为空！"); 
} 

}); 
//验证商圈英文名 
$("#businessEname").blur(function(){ 
var businessEname=$("#businessEname").val(); 
if(businessEname!=""){ 
$("#businessEname_error").html("<img src='${ctx}/images/success_img.gif' style='width:15px;height:15px;'/>"); 
}else{ 
$("#businessEname_error").attr("class","error_div").html("<img src='${ctx}/images/error_img2.gif' style='width:15px;height:15px;'/>"+"商圈英文名不能为空！"); 
} 
}); 
//图片上传 及数据保存 
$("#imgSave").click(function(){ 
var ext = '.jpg.jpeg.gif.bmp.png.'; 
var f=$("#file").val(); 
if (f== "") {//先判断是否已选择了文件 
$("#file_error").attr("class","error_div").html("<img src='${ctx}/images/error_img2.gif' style='width:15px;height:15px;'/>"+"请添加商圈logo！"); 
return false; 
} 
f = f.substr(f.lastIndexOf('.') + 1).toLowerCase(); 
if (ext.indexOf('.' + f + '.') == -1) { 
$("#file_error").attr("class","error_div").html("<img src='${ctx}/images/error_img2.gif' style='width:15px;height:15px;'/>"+"图片格式不正确！"); 
return false; 
} 

var options = { 
url: "${ctx}/upload/upload.do", 
dataType: 'json', 
contentType: "application/json; charset=utf-8", 
success: function(data) { 
// 'data' is an object representing the the evaluated json data 
// 如果图片上传成功则保存表单注册数据 
if(data.status=="0"){ 
var fileName=data.fileName; 
//alert(fileName); 
var businessName=$("#businessName").val(); 
var userId=$("#userId").val(); 
var businessEname=$("#businessEname").val(); 
businessName=encodeURI(businessName); 
businessName=encodeURI(businessName); 
var urls="${ctx}/business/addBusiness.do?businessName="+businessName+"&businessPic="+fileName+"&businessEname="+businessEname+"&userId="+userId; 
$.ajax({ 
type: "post", 
url:urls , 
dataType: "json", /*这句可用可不用，没有影响*/ 
contentType: "application/json; charset=utf-8", 
success: function (data) { 
if(data.status=="0"){ 
alert("注册成功!"); 
}else{ 
alert("注册失败!原因是："+data.message); 
} 
}, 
error: function (XMLHttpRequest, textStatus, errorThrown) { 
alert(errorThrown); 
} 
}); 
}else{ 
$("#file_error").attr("class","error_div").html("<img src='${ctx}/images/error_img2.gif' style='width:15px;height:15px;'/>"+data.message); 
} 
} 
}; 
// 提交表单 
$('#uploadImgForm').ajaxSubmit(options); 
}); 
}); 
</script> 
</body> 
</html> 

二：service(FileUploadController.java ----springMVC 之controller层)

复制代码代码如下:

@Controller 
@RequestMapping(value = "/upload") 
public class FileUploadController { 
private Logger logger; 
@RequestMapping(value = "upload.do", method = RequestMethod.POST) 
public void fileUpload(HttpServletRequest request, HttpServletResponse response) { 
Map<String, Object> resultMap = new HashMap<String, Object>(); 
String newRealFileName = null; 
try { 
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; 
CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("file"); 
// 获得文件名： 
String realFileName = file.getOriginalFilename(); 
if(file.getSize()/1024>=5*1024){ 
resultMap.put("status", 1); 
resultMap.put("message", "图片不能大于5M"); 
}else{ 
System.out.println("获得文件名：" + realFileName); 
newRealFileName = FileUploadController.getNowTime() + realFileName.substring(realFileName.indexOf(".")); 
// 获取路径 
String ctxPath = request.getSession().getServletContext().getRealPath("//") + "//temp//"; 
// 创建文件 
File dirPath = new File(ctxPath); 
if (!dirPath.exists()) { 
dirPath.mkdir(); 
} 
File uploadFile = new File(ctxPath + newRealFileName); 
FileCopyUtils.copy(file.getBytes(), uploadFile); 
request.setAttribute("files", loadFiles(request)); 
resultMap.put("status", 0); 
resultMap.put("fileName", newRealFileName); 
} 
} catch (Exception e) { 
resultMap.put("status", 1); 
resultMap.put("message", "图片上传出错"); 
logger.info("***** 图片上传出错 *****"); 
System.out.println(e); 
} finally { 
PrintWriter out = null; 
try { 
out = response.getWriter(); 
} catch (IOException e) { 
e.printStackTrace(); 
} 
//必须设置字符编码，否则返回json会乱码 
response.setContentType("text/html;charset=UTF-8"); 
out.write(JSONSerializer.toJSON(resultMap).toString()); 
out.flush(); 
out.close(); 
} 
} 
} 