java Springmvc ajax上传
ajax上传方式相对于普通的form上传方式要便捷,在更多的时候都会使用ajax (简单的小示例)
1.要先去下载一个 jquery.ajaxfileupload.js(基于jquery.js上的js) 还有jquery.js
2.首先要先配置一下servlet.xml
<!-- 文件上传 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="10000000" /> </bean>
3.在jsp页面上的form表单中
<form action="shxt_upload03" method="post" > 文件上传:
<input type = "file" name="myFile" id="myFile" /> <br/> <input type = "text" name= "shxt" id="shxt" /> <input type = "submit" value="上传文件" /> </form>
<script type="text/javascript">
$(function(){
$('#myFile').ajaxfileupload({
'action': 'shxt_upload03',
'onComplete': function(response) {
},
'onCancel': function() {
}
});
});
</script>
4.在controller里面
public ModelAndView test01(MultipartFile myFile,HttpServletRequest request,HttpServletResponse response){ //1.判断文件是否存在 if(!myFile.isEmpty()){ //2.获取服务器的绝对路径 String path = request.getSession().getServletContext().getRealPath("/upload"); //3.判断文件夹是否存在 File floder = new File(path); if(!floder.isDirectory()){//判断是否为文件夹,前提是文件存在 floder.mkdirs();//创建文件 } try { //4.获取上传文件的后缀名 String extension = FilenameUtils.getExtension(myFile.getOriginalFilename());//5.创建上传文件的新名称
//另外一种起名字的方式 //String newName= UUID.randomUUID().toString()+"."+extension; String newName = (new Date()).getTime()+"_"+(new Random().nextInt(10000))+"."+extension; File newFile = new File(path+"/"+newName); myFile.transferTo(newFile); //返回值 response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); out.write(newName); out.flush(); out.close(); } catch (Exception e) { // TODO: handle exception } } return null; }