【非官方方式】获取Disconf动态更新的配置文件的值

 1 public class PropertiesUtils {
 2     private static final Logger logger = LoggerFactory.getLogger(PropertiesUtils.class);
 3     private static final String charset = "UTF-8";
 4     private static final Properties sysProp = new Properties();
 5     private static long lastModify = 0L;
 6     private static File system;
 7     private PropertiesUtils() {
 8         throw new IllegalAccessError("Utility class");
 9     }
10     static {
11         try {
12             system = new ClassPathResource("system.properties").getFile();
13             load(system.lastModified());
14         } catch (Exception e) {
15             logger.error("properties file load error",e);
16             throw new VmapRuntimeException(e);
17         }
18     }
19 
20     private static void load(long updateTime) {
21         try {
22             //注意清空,否则没有新值,会使用旧值
23             sysProp.clear();
24             //获取属性
25             sysProp.load(new InputStreamReader(new FileInputStream(system), charset));
26             //获取文件修改时间
27             lastModify = updateTime;
28         } catch (IOException e) {
29             throw new RuntimeException(e);
30         }
31     }
32 
33     
34     /**获取属性配置值
35      * @param name 名称
36      * @return
37      */
38     public static String getProp(String name) {
39         long modify = system.lastModified();
40         if (modify > lastModify) load(modify);
41         return  sysProp.getProperty(name);
42     }
43 }