多数据源获取使用数据库是Oracle还是mysql

public static String getDBType(){
		String retStr="";
		ApplicationContext ctx = ApplicationContextUtil.getContext();
		if (ctx==null) {
			 return retStr;//如果ctx为空，则服务器异常了
		}else{
			org.springframework.orm.hibernate4.LocalSessionFactoryBean sf = (org.springframework.orm.hibernate4.LocalSessionFactoryBean)ctx.getBean("&sessionFactory");
			String dbdialect = sf.getHibernateProperties().getProperty("hibernate.dialect");
			log.debug(dbdialect);
			if (dbdialect.equals("org.hibernate.dialect.MySQLDialect")) {
				retStr="mysql";
			}else if (dbdialect.contains("Oracle")) {//oracle有多个版本的方言
				retStr = "oracle";
			}else if (dbdialect.equals("org.hibernate.dialect.SQLServerDialect")) {
				retStr = "sqlserver";
			}else if (dbdialect.equals("org.hibernate.dialect.PostgreSQLDialect")) {
				retStr = "postgres";
			}
			else if (dbdialect.equals("org.jeecgframework.core.common.hibernate.dialect.MySQLServer2008Dialect")) {
				retStr = "sqlserver";
			}
			return retStr;
		}
	}