jquery的ajaxSubmit()异步上传图片并保存表单数据演示代码
(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！
一：web (add.jsp)
. 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="https://java.sun.com/jsp/jstl/core" prefix="c" %>
<c:set var="ctx" value="${pagecontext.request.contextpath }" />
<!doctype html public "-//w3c//dtd html 4.01 transitional//en" "https://www.w3.org/tr/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>注册商圈</title>
<link href="${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="${ctx}/css/common.css" />
<%
response.setcharacterencoding("utf-8");//这个是设置编码方式
response.setcontenttype("text/html");//这个是设置网页类型，为文本代码
userinformation user=null;
string username="";
integer userid=null;
if(request.getsession().getattribute("userinfo")!=null){
user=(userinformation)request.getsession().getattribute("userinfo");
username=user.getusername();
userid=user.getuserid();
}else{
username="请<a href='https://localhost:8080/fk/test/login.jsp'>登录</a>";
}
%>
</head>
<body>
<p class="header-inner">
<p class="container">
<p class="row">
<p class=" page-header clearfix">
<p class="span11"> <h1 class="page-header" style="background:black;"><img alt="fingerknow" src="${ctx}/images/fingerknow.png" width=""><small>中文最大的购物经验分享平台</small></h1> </p>
<p class="span1"> <a href="#">首页</a> |<a href="#">帮助</a></p>
</p>
</p>
</p>
</p>
<p class="container" id="businessename_p">
<p class="row">
<p class="span1"></p>
<p class="span10">
<p class="widget-box">
<p class="widget-title">
<span class="icon">
<i class="icon-align-justify"></i>
</span>
<h5>注册商圈</h5>
</p>
<p class="widget-content nopadding">
<form class="form-horizontal" method="post" action="${ctx}/upload/upload.do" id="uploadimgform" enctype="multipart/form-data">
<p class="control-group" style="border: 0px solid red;">
<label class="control-label">*商圈名：</label>
<p class="controls" style="width: 350px;border: 0px solid red;vertical-align: middle;" >
<input type="text" name="businessname" maxlength="20" id="businessname" width="200px;"/>
<input type="text" name="userid" maxlength="20" value="<%=userid%>" id="userid" width="200px;"/>
<p id="businessname_error" ></p>
</p>
</p>
<p class="control-group">
<label class="control-label">*商圈logo：</label>
<p class="controls" style="width:350px;">
<input type="file" name="file" id="file">
<p id="file_error"></p>
</p>
</p>
<p class="control-group">
<label class="control-label">*商圈英文名：</label>
<p class="controls" style="width: 350px;">
<input type="text" name="businessename" id="businessename" />
<p id="businessename_error"></p>
</p>
</p>
<p class="form-actions">
<button type="button" id="imgsave" value="validate" class="btn btn-primary">提交注册</button>
</p>
</form>
</p>
</p>
</p>
<p class="span1"></p>
</p>
</p>
<p class="container" style="background:white;">
<p class="row">
<p class="span12" style="margin-left: 25%;">
<p>© 2012 fingerknow.com <span>|</span><a href="#" rel="nofollow" >隐私条款</a><span>|</span><a href="#" rel="nofollow">服务条款</a><span>|</span><a href="#" rel="nofollow" >粤icp备12003619号-1</a></p>
</p>
</p>
</p>
<script src="${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{
$("#businessname_error").attr("class","error_p").html("<img src='${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{
$("#businessename_error").attr("class","error_p").html("<img src='${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
$("#file_error").attr("class","error_p").html("<img src='${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) {
$("#file_error").attr("class","error_p").html("<img src='${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{
$("#file_error").attr("class","error_p").html("<img src='${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)
. 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();
}
}
}