Java实现用户头像上传与处理

//保存用户扩展信息
public String saveUserInfo(){
actionLog.info(this, "");
actionLog.info(this, "");
actionLog.info(this, "Begin...");
actionLog.info(this, "saveUserInfo()Start...");
HttpServletRequest request = ServletActionContext.getRequest();
LoginUserInfo loginUserInfo = (LoginUserInfo)request.getSession().getAttribute("loginUserInfo");
String USER_CODE = loginUserInfo.getCODE();
//修改头像
if(file!= null){
String currentTime = DateUtil.currentDate("yyyy-MM-dd-HH-mm-ss");
String path = "/TY/style/images/user-head/"+USER_CODE+"/"+currentTime;
String realPath = ServletActionContext.getServletContext().getRealPath(path);//图片真实路径
File savedir = new File(realPath);
if(!savedir.exists()){
savedir.mkdirs();
}
File savefile = new File(savedir,fileFileName);
if(file.length()>4194304){
flag1 = "";
flag2 = "";
flag1 = "tooBig";
return "saveUserInfo";
}else if(fileContentType.equals("image/jpg")
||fileContentType.equals("image/gif")
||fileContentType.equals("image/png")
||fileContentType.equals("image/bmp")
||fileContentType.equals("image/jpeg")){
flag1 = "";