一步一步分析吧,先移除多余的代码,只保留
        SmartUpload smartUpload = new SmartUpload();
        smartUpload.initialize(pageContext);
        try{
            smartUpload.upload();
        }catch(Exception e) {
            e.printStackTrace();        
        }
        int count = smartUpload.save("/upload");
看是否可以上传成功