springmvc+ajaxfileupload异步上传

希望对大家有帮助 不能直接用的 根据需求修改吧

spring 的配置文件需要设置：

<bean id="multipartResolver"

class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

<!-- 设置上传文件的最大尺寸为1MB -->

<property name="maxUploadSize">

<value>10485760</value>

</property>

</bean>

------------必备JS

<script type="text/javascript" src="../js/jquery-1.3.2.min.js"></script>

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

------------html

<form action="#" name="myform" method="post">

<input type='file' id="uploada" name="uploada" size='50'/>

<input type="button" style="width: 5em" onclick="uploadImages('uploada')" value='上传'/>

<input type='file' id="uploadb" name="uploadb" size='50'/>

<input type="button" style="width: 5em" onclick="uploadImages('uploadb')" value='上传'/>

<input type='file' id="uploadc" name="uploadc" size='50'/>

<input type="button" style="width: 5em" onclick="uploadImages('uploadc')" value='上传'/>

</form>

-----------AJAX

function uploadImages(type) {

$.ajaxFileUpload({

//跟具updateP得到不同的上传文本的ID

url:'${ctx}/activity/uploadImg.do?updateP='+type, //需要链接到服务器地址

secureuri:false,

fileElementId:''+type+'', //文件选择框的id属性（必须）

dataType: 'text',

success: function (data, status){

var data = eval("("+data+")");

if(data.updateP=='uploada'){

document.getElementById("显示文件访问路径文本的IDA").value=baseurl+"/upload/"+data.fileName;

}else if(data.updateP=='uploadb'){

document.getElementById("显示文件访问路径文本的IDB").value=baseurl+"/upload/"+data.fileName;

}else if(data.updateP=='uploadc'){

document.getElementById("显示文件访问路径文本的IDC").value=baseurl+"/upload/"+data.fileName;

}

alert('上传失败');

},

error: function (data, status, e){

alert('上传失败');

}

}

);

}

--------------spring

@RequestMapping("/activity/uploadImg.do")

public void uploadImg(MultipartHttpServletRequest request,MobileActivityJsp mobileActivityJsp,HttpServletResponse response) throws IOException{

request.setCharacterEncoding("UTF-8");

response.setContentType("text/html;charset=UTF-8");

PrintWriter out = response.getWriter();

SimpleDateFormat simpleFormat = new SimpleDateFormat("MMddHHmmsss");

String generationfileName = simpleFormat.format(new Date())+new Random().nextInt(1000);

//保存路径

String savePath = "D:/mobilePermissions/ddmap-mobile-medit/web/upload";

String updateP = request.getParameter("updateP");

String fileNameSuffix=null;

String fileName= null;

if(null!=updateP&&!"".equals(updateP)){

try {

MultipartFile mf = request.getFile(updateP);

fileName=mf.getOriginalFilename();

if(null!=mf&&!"".equals(mf)){

fileNameSuffix=fileName.substring(fileName.lastIndexOf(".")+1,fileName.length());

SaveFileFromInputStream(mf.getInputStream(),savePath,generationfileName+"."+fileNameSuffix);

out.write("{'state':'0','fileName':'"+generationfileName+"."+fileNameSuffix+"','updateP':'"+updateP+"'}");

}

} catch (Exception e) {

out.write("{'state':'1'}");

e.printStackTrace();

}

}

}

//保存文件 1,文件 2，保存路径 3，文件名称

public void SaveFileFromInputStream(InputStream stream,String path,String filename) throws IOException{

FileOutputStream fs=new FileOutputStream( path + "/"+ filename);

byte[] buffer =new byte[1024*1024];

int bytesum = 0;

int byteread = 0;

while ((byteread=stream.read(buffer))!=-1){

bytesum+=byteread;

fs.write(buffer,0,byteread);

fs.flush();

}

fs.close();

stream.close();

}