如何使用Spring @Value从Java属性文件填充HashMap

在Spring配置中注册属性文件：

<util:properties id="myProp" location="classpath:my.properties"/>

然后创建组件：

@Component("PropertyMapper")public class PropertyMapper {    @Autowired    ApplicationContext applicationContext;    public HashMap<String, Object> startWith(String qualifier, String startWith) {        return startWith(qualifier, startWith, false);    }    public HashMap<String, Object> startWith(String qualifier, String startWith, boolean removeStartWith) {        HashMap<String, Object> result = new HashMap<String, Object>();        Object obj = applicationContext.getBean(qualifier);        if (obj instanceof Properties) { Properties mobileProperties = (Properties)obj; if (mobileProperties != null) {     for (Entry<Object, Object> e : mobileProperties.entrySet()) {         Object oKey = e.getKey();         if (oKey instanceof String) {  String key = (String)oKey;  if (((String) oKey).startsWith(startWith)) {      if (removeStartWith)key = key.substring(startWith.length());      result.put(key, e.getValue());  }         }     } }        }        return result;    }}

当我想将所有以specifix值开头的属性映射到带有@Value注释的HashMap时：

@Servicepublic class MyServiceImpl implements MyService {    @Value("#{PropertyMapper.startWith('myProp', 'service.expiration.', true)}")    private HashMap<String, Object> portalExpirations;