public class SysConfig {    private static final Properties properties = new Properties();    static{       Resource rs1 = new ClassPathResource("sys-config.properties");        try {            properties.load(rs1.getInputStream());        } catch (Exception e) {            e.printStackTrace();        }    }    public static String get(String key){        return properties.getProperty(key);    }    public static void main(String args[]){        SysConfig.get("emialUrl");    }}