code: public void configConstant(Constants me) {
  		//load properties
  		this.loadPropertyFile();
  		me.setViewType(ViewType.JSP);
  		me.setDevMode(this.getAppDevMode());
  		me.setEncoding(Const.DEFAULT_ENCODING);
  		me.setError404View(PageViewKit.get404PageView());
  		me.setError500View(PageViewKit.get500PageView());
  		me.setError403View(PageViewKit.get403PageView());
  		JFinalConfigExt.APP_NAME = this.getAppName();
  		// config others
  		configMoreConstants(me);
  	}
docs: Config constant
  
  Default <br/>
  ViewType: JSP <br/>
  Encoding: UTF-8 <br/>
  ErrorPages: <br/>
  404 : /WEB-INF/errorpages/404.jsp <br/>
  500 : /WEB-INF/errorpages/500.jsp <br/>
  403 : /WEB-INF/errorpages/403.jsp <br/>
  UploadedFileSaveDirectory : cfg basedir + appName <br/>