spring mvc做上传图片，文件小于10k就不生成临时文件了

这是spring-mvc.xml中的

<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartRe     solver">
<property name="defaultEncoding" value="UTF-8" />
<!-- 指定所上传文件的总大小不能超过2000KB。注意maxUploadSize属性的限制     不是针对单个文件，而是所有文件的容量之和 -->
<property name="maxUploadSize" value="2048000" />
<property name="maxInMemorySize" value="10240" />
</bean>

下面是方法：

@RequestMapping(value="uploadFile.do",method={RequestMethod.GET,RequestMethod.POST})
public String ajaxUpload(ModelMap mm,HttpSession ses,HttpServletRequest req
) throws Exception {
try {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) req;
// 获得文件：
MultipartFile upload = multipartRequest.getFile("upload");
String newFileName = new Date().getTime() + "_" + SesHelper.getSimUser(ses).getManageUser().getMuId()
+ getExtention(upload.getOriginalFilename());

CommonsMultipartFile cf= (CommonsMultipartFile)upload;
DiskFileItem fi = (DiskFileItem)cf.getFileItem();
File targetFile = fi.getStoreLocation();

if(ArrayUtils.indexOf(imageExtentions, getExtention(upload.getOriginalFilename()).substring(1))!=-1){
**RemoteFileUtil.copyImage(targetFile, newFileName);**
}else{
throw new BaseException("请确定是图片文件");
}
handleSuc(mm);
mm.put("msg", imgServerName+newFileName);
} catch (Exception e) {
handleErr(mm , e);
}
return JSON_COM;
}

上面的调这个方法

public static synchronized void copyImage(File src, String filename) {
try {
**copy(src, filename);**
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("请检查服务器：" + serverIps[0] + ":" + serverPorts[0] + "是否连接通畅");
}
}

上面的调这个方法

private static synchronized void copy(File src, String filename)
throws UnknownHostException, IOException {
for (int i = 0; i < serverIps.length; i++) {
Socket client = new Socket(serverIps[i], Integer
.parseInt(serverPorts[i]));
OutputStream os = client.getOutputStream();
os.write((filename + ";").getBytes());
byte[] byteBuffer = new byte[1];
FileInputStream fos = new FileInputStream(src);
BufferedInputStream bis = new BufferedInputStream(fos);
System.out.println(filename);
**while (bis.read(byteBuffer) != -1) {
os.write(byteBuffer);
}**
os.flush();
bis.close();
fos.close();
os.close();
client.close();
System.out.println(client.getLocalAddress());
}
}

下面是页面

<script type="text/javascript">
axUpload=true;
var fileName = "";
function ajaxuploadsubmit() {
var index = layer.load();
$('#uploadForm').ajaxSubmit({
url:'${siteUrl}/file/uploadFile.do',
type:'post',
dataType: 'json',
success:function (data){
if(data.code == "S"){
layer.close(index);
layer.msg("文件上传成功,上传文件的文件名为"+data.msg, {icon: 1});
fileName = data.msg;
closeAndOpenSuc();
}else{
layer.close(index);
layer.msg(data.msg, {icon: 2});
}

}
});
}

function closeAndOpenSuc() {
layer.close(uploadObj.imgLayerId);
$('#'+uploadObj.imgInputId).val(fileName);
$('#'+uploadObj.imgShowId).attr("src",fileName);
}

function closeAndOpen() {
layer.close(uploadObj.imgLayerId);
}
</script>

<div class="modal-content">
<div class="modal-body">
<form id="uploadForm" class="form-horizontal" role="form" enctype="multipart/form-data">
<div class="padd">
<div class="form quick-post">
<div class="form-group">
<label class="control-label col-lg-2" style="width:100px;padding-top:5px;">选择文件</label>
<div class="col-lg-6">
<input id="upload" type="file" size="30" height="20px" name="upload">
</div>
</div>
<div class="form-group">
<label class="control-label col-lg-2" style="width:100px;padding-top:5px;"> </label>
<div class="col-lg-6">
<input type="button" name="button" value="上传文件" class="btn btn-success" onclick="ajaxuploadsubmit()" />
</div>
</div>
</div>
</div>
</form>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" onclick="closeAndOpen()">关闭</button>
</div>
</div>

报错信息

while (bis.read(byteBuffer) != -1) {

os.write(byteBuffer);

}

中会报错

java.io.FileNotFoundException: C:\apache-tomcat-7.0.61\work\Catalina\localhost\FishManage\upload_de2e4204_56e7_4b34_adce_163e38e29654_00000003.tmp (系统找不到指定的文件。)