使用ajaxfileupload.js实现上传文件功能

  }
});

@Path("/imgUpload")
@POST
@Produces("application/json; charset=utf-8")
@Consumes(MediaType.MULTIPART_FORM_DATA )
@BadgerFish
public JSONObject upload(@QueryParam("orderId") String orderId,@Context HttpServletRequest request,@Context HttpServletResponse response) {
JSONObject jsonobj = new JSONObject();
String file_path=request.getSession().getServletContext().getRealPath("/")+File.separator+"corpfile"+File.separator;//文件存储路径
String upload_file_path="";
File file =new File(file_path);
if(!file.exists() && !file.isDirectory()){ //如果文件夹不存在则创建
file.mkdir();
upload_file_path=file_path;
}else{
upload_file_path=file_path;
}
DiskFileItemFactory factory = new DiskFileItemFactory(); // 设置工厂
factory.setRepository(new File(file_path));// 设置文件存储位置
factory.setSizeThreshold(2048 * 1024);// 设置大小，如果文件小于设置大小的话，放入内存中，如果大于的话则放入磁盘中
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding("utf-8");// 这里就是中文文件名处理的代码，其实只有一行
String fileName = "";
List list;
JSONObject jsonobj = new JSONObject();
try {
list = upload.parseRequest(request);
for (FileItem item : list) {
if (item.isFormField()) {
String name = item.getFieldName();
String value = item.getString("utf-8");
} else {
String name = item.getFieldName();
String value = item.getName();
fileName =name + ".jpg";
if (item.getSize() > 10485760) {//您好，上传文件要小于10M！
jsonobj.put("retCode","100");
jsonobj.put("retMsg","您好，上传文件要小于10M！"):
} else {//上传成功
item.write(new File(upload_file_path,fileName));
System.out.println(File.separator + "corpfile" + File.separator + fileName);
jsonobj.put("retCode","0");
jsonobj.put("retMsg","您好，上传成功！");
}
}
}
} catch (Exception e) {//上传失败
e.printStackTrace();
jsonobj.put("retCode","9999");　　　　　　　jsonobj.put("retMsg","您好，文件上传失败，");
}
return jsonobj;
}

}