标签：dom controls web required gets pac net patch detail
今天需要做一个上传图片的功能，由于框架里面没有带，上网搜了下。看到有spring mvc的图片上传，而且有例子，刚好是自己需要的，直接粘贴复制下。参考：
http://blog.csdn.net/luckey_zh/article/details/46867957#
很简单，使用了commons-upload和commons-io包，配置文件位置后，页面form表单这几设置，然后就好了。
配置完后，自己运行却发现，上传报错了：
org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found org.apache.tomcat.util.http.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:840) org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:259) org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:283) org.apache.catalina.connector.Request.parseParts(Request.java:2811) org.apache.catalina.connector.Request.getParts(Request.java:2729) org.apache.catalina.connector.RequestFacade.getParts(RequestFacade.java:1075) org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:84) org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:77) org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:76) org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1073) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:912) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868) javax.servlet.http.HttpServlet.service(HttpServlet.java:650) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) javax.servlet.http.HttpServlet.service(HttpServlet.java:731) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) com.springapp.mvc.filter.UploadImageInterceptor.doFilter(UploadImageInterceptor.java:27)
上网搜了下，原来是因为自己使用的是ajax提交的，但是ajax默认的content-type是x-www-form-urlencoded，这样提交文件是无法生效的。由于框架的原因，如果改成form提交和其他页面相差太大，而且不一定能解决问题，于是决定继续顺着ajax为何不能提交这个坑继续下去。
然后上网继续搜，发现需要设置ajax的几个属性为false，这样才能提交：(参考http://www.jianshu.com/p/46e6e03a0d53)
$.ajax({
url: "ur",
contentType: false, //必须设置
processData: false, //必须设置
cache: false, //设置为false
// data: $(form).serialize(),
data: new FormData($(‘#myForm‘)[0]),
type: "POST",
刚开始用 data: $(form).serialize(), 结果不行，换成了下面的这种，然而又有问题了。页面的元素通过request.getParameter("")居然获取不到了。。。
继续搜，为何搜不到。。。然后在一篇文章上面看到了下面的说法：（参考：http://www.chongchonggou.com/g_464425214.html）
设置提交方式为enctype="multipart/form-data"后，使用request.getParameter（“”）是获取不到页面的formData的数据的。 上面也说了解决办法，就是使用common-smartupload进行获取，我就是
通过这种方式获取的，不过碰到了几个问题，比如乱码问题、windows/linux 分隔符问题以及文件找不到等小问题，最后总算解决了。另外附上一篇一个大神之前写的一篇文章。
http://www.cnblogs.com/xdp-gacl/p/4200090.html
附上自己的代码以及实现：
前端：
<link href="#springUrl(‘/static/css/bootstrap.min.css‘)" rel="stylesheet">
<link href="#springUrl(‘/static/css/style.css‘)" rel="stylesheet">
<link href="#springUrl(‘/static/css/datetimepicker.css‘)" rel="stylesheet">
<body class="white-bg">
<div class="ibox-content" style="width: 430px;">
<form id="myForm" class="form-horizontal" autocomplete="off" data-validator-option="{theme:‘default‘}" enctype="multipart/form-data" >
<input type="hidden" name="id" value="$!{activity.id}">
<div class="form-group"><label class="col-sm-2 control-label">xxx</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="$!{activity.title}" name="title" data-rule="xxx:required;title">
</div>
</div>
<div class="hr-line-dashed"></div>
<div class="form-group"><label class="col-sm-2 control-label">xxx</label>
<div class="col-sm-10">
<textarea class="form-control" value="$!{activity.content}" name="content" data-rule="xxx:required;content">$!{activity.content}</textarea>
</div>
</div>
<div class="hr-line-dashed"></div>
<div class="form-group"><label class="col-sm-2 control-label">xxx</label>
#if(${activity.pic} == "null")
<div class="col-sm-10">
<input type="file" name="pic" id="pic" data-rule="xxx:required;pic"/>
</div>
#end
#if(${activity.pic} != "null")
<div class="col-sm-10">
<input type="file" name="pic" id="pic" />
</div> <img alt="xxx" src="#springUrl(‘/static/upload/images/f854d8f0186649fcac9a01b4a5da2c8d.jpg‘)" style="height:100%; width:100%">
#end
</div>
<div class="hr-line-dashed"></div>
<div class="form-group"><label class="col-sm-2 control-label">xxx/label>
<div class="col-sm-10">
<select class="form-control m-b" name="tag">
<option value="1">xx</option>
<option value="2">xx</option>
<option value="3">xx</option>
<option value="4">xx</option>
</select>
</div>
</div>
<div class="form-group"><label class="col-sm-2 control-label">xx</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="$!{activity.places}" name="places" data-rule="xx:required;places">
</div>
</div>
<div class="form-group"><label class="col-sm-2 control-label">xx</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="$!{activity.deposit}" name="deposit" data-rule="xx:required;deposit">
</div>
</div>
<div class="form-group"><label class="col-sm-2 control-label">xx</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="$!{activity.fullPrice}" name="fullPrice" data-rule="xx:required;fullPrice">
</div>
</div>
<div class="form-group"><label class="col-sm-2 control-label">xx</label>
<div class="col-sm-10">
<input type="text" class="form-control" value="$!{activity.detailAddress}" name="detailAddress" data-rule="xx:required;detailAddress">
</div>
</div>
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="control-label">xx:</label>
<div class="controls">
<input value="$!date.format(‘yyyy-MM-dd HH:mm:ss ‘,$!activity.beginTime)" name="beginTime" id="beginTime">
</div>
</div>
</div>
</div>
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label class="control-label">xx:</label>
<div class="controls">
<input value="$!date.format(‘yyyy-MM-dd HH:mm:ss ‘,$!activity.endTime)" name="endTime" id="endTime">
</div>
</div>
</div>
</div>
<div class="hr-line-dashed"></div>
<div class="form-group">
<div class="text-center">
<button class="btn btn-primary" type="submit">#if($!{activity})修 改#else提 交#end</button>
</div>
</div>
</form>
</div>
<script src="#springUrl(‘/static/js/jquery-2.1.1.js‘)"></script>
<script src="#springUrl(‘/static/plugins/nice-validator-0.8.1/jquery.validator.js?local=zh-CN‘)"></script>
<script src="#springUrl(‘/static/js/common.js‘)"></script>
<script src="#springUrl(‘/static/js/bootstrap-datetimepicker.js‘)"></script>
<script src="#springUrl(‘/static/js/bootstrap-datetimepicker.zh-CN.js‘)"></script>
<script type="text/javascript">
$(‘#beginTime‘).datetimepicker({
format: ‘yyyy-mm-dd hh:ii:ss‘,
language: ‘zh-CN‘,
autoclose: true
});
$(‘#endTime‘).datetimepicker({
format: ‘yyyy-mm-dd hh:ii:ss‘,
language: ‘zh-CN‘,
autoclose: true
});
$("#myForm").validator({
valid: function(form){
var me = this;
// 提交表单之前，hold住表单，防止重复提交
me.holdSubmit();
$.ajax({
url: "#springUrl(‘/activities/editActivity‘)",
contentType: false,
processData: false,
cache: false,
// data: $(form).serialize(),
data: new FormData($(‘#myForm‘)[0]),
type: "POST",
success: function(data){
var d = JSON.parse(data);
if(d.success && d.data){
window.parent.location.reload();
//当你在iframe页面关闭自身时
//var index = parent.layer.getFrameIndex(window.name); //先得到当前iframe层的索引
//parent.layer.close(index); //再执行关闭
} else {
//失败，提交表单成功后，释放hold，如果不释放hold，就变成了只能提交一次的表单
me.holdSubmit(false);
}
}
});
}
});
</script>
</body>
</html>
后端代码以及实现：
@ResponseBody @Permission("5001") @RequestMapping(value = "/editActivity") public String editActivity(HttpServletRequest request,Activity activity) throws ParseException { activity = new Activity(); boolean rlt = false; DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); //获得物理路径webapp所在路径 String pathRoot = request.getSession().getServletContext().getRealPath(""); String path=""; upload.setHeaderEncoding("UTF-8");// 解决乱码关键 Map<String,String> map = new HashMap<>(); try { List<FileItem> list = upload.parseRequest(request); for(FileItem item : list){ if(item.isFormField()){ //注意此处是没有图片的其他属性 String value = null; try { value = new String(item.getString("utf-8")); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } map.put(item.getFieldName(),value); }else{ //生成uuid作为文件名称 String uuid = UUID.randomUUID().toString().replaceAll("-",""); //获得文件后缀名称 String imageName=item.getName().substring(item.getName().lastIndexOf(".")+1); String fileUrl = Constant.FILE_URL; path = fileUrl + uuid+"."+imageName; map.put(item.getFieldName(),Constant.FILE_URL+uuid+"."+imageName); upload.setHeaderEncoding("UTF-8"); try { //得到上传文件的扩展名 String fileExtName = imageName.substring(imageName.lastIndexOf(".")+1); //如果需要限制上传的文件类型，那么可以通过文件的扩展名来判断上传的文件类型是否合法 System.out.println("上传的文件的扩展名是："+fileExtName); //获取item中的上传文件的输入流 InputStream in = item.getInputStream(); //得到文件保存的名称 String saveFilename = path; //得到文件的保存目录 String realSavePath = makePath(pathRoot, fileUrl); //创建一个文件输出流 FileOutputStream out = new FileOutputStream(pathRoot+path); //创建一个缓冲区 byte buffer[] = new byte[1024]; //判断输入流中的数据是否已经读完的标识 int len = 0; //循环将输入流读入到缓冲区当中，(len=in.read(buffer))>0就表示in里面还有数据 while((len=in.read(buffer))>0){ //使用FileOutputStream输出流将缓冲区的数据写入到指定的目录(savePath + "\\" + filename)当中 out.write(buffer, 0, len); } //关闭输入流 in.close(); //关闭输出流 out.close(); //删除处理文件上传时生成的临时文件 item.delete(); } catch (IOException e) { e.printStackTrace(); } } } } catch (FileUploadException e) { e.printStackTrace(); } activity.setBeginTime(DateUtils.toDate(map.get("beginTime"),"yyyy-MM-dd HH:mm:ss") ); activity.setPlaces(Integer.valueOf(map.get("places"))); activity.setCity(map.get("city")); activity.setContent(map.get("content")); activity.setTag(Integer.valueOf(map.get("tag"))); activity.setDeposit(new BigDecimal(map.get("deposit"))); activity.setDetailAddress(map.get("detailAddress")); activity.setPic(map.get("pic")); activity.setEndTime(DateUtils.toDate(map.get("endTime"),"yyyy-MM-dd HH:mm:ss")); activity.setTitle(map.get("title")); activity.setUpdateTime(new Date()); if(StringUtils.isNotBlank(map.get("id"))){ activity.setId(Long.valueOf(map.get("id"))); rlt = activityService.updateById(activity); }else { activity.setAddTime(new Date()); rlt = activityService.insert(activity); } return callbackSuccess(rlt); }
配置文件这块，原来的springmvc 是有这样的一段配置的：
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8"/> <!– 最大内存大小 –> <property name="maxInMemorySize" value="10240"/> <!– 最大文件大小，-1为不限制大小 –> <property name="maxUploadSize" value="-1"/> </bean>
但是实际做后发现，配置后使用common-fileupload上传不起作用，原因就是因为fileUpload解析过request，所以导致上传为空。
所以才有了上面的自己写代码来上传。参考：http://zzc1684.iteye.com/blog/2258463
标签：dom controls web required gets pac net patch detail
原文地址：http://www.cnblogs.com/thinkingandworkinghard/p/7075261.html
