在spring中使用相同的键值对加载多个属性文件？答案

【问题标题】：loading multiple property files in spring with same key value pairs?在spring中使用相同的键值对加载多个属性文件？
【发布时间】：2014-01-29 07:34:38
【问题描述】：

我正在使用spring3。我正在加载如下属性文件。

<bean id="propertyFactory"
        class="org.springframework.beans.factory.config.PropertiesFactoryBean">
        <property name="ignoreResourceNotFound" value="false" />
        <property name="locations">
            <list>
                <value>classpath:conf/app.properties</value>
            </list>
        </property>
    </bean>


app.properties
------------
user=xxx
pwd=xxx
host=xxx

以上配置运行良好，没有任何问题。

现在我必须再加载一个具有相同键但具有不同值的属性文件。我无法更改属性文件中的键名。

现在我还有一个如下的 porperty 文件。

 app.properties
    ------------
    user=abc
    pwd=xxx
    host=differenthost

现在如何使用相同的键加载多个属性文件？

谢谢！

【问题讨论】：

请看stackoverflow.com/questions/10433186/…
感谢库尔特的建议..我明白了..

标签： java spring java-ee-7

【解决方案1】：

如果您需要使用相同的键弹簧加载许多属性文件（差异名称），在spring boot cloud config客户端中实现波纹管（使用springCloudConfigServer加载文件）并为props添加前缀是：



    @RefreshScope
    @Configuration
    public class CustomProperties implements ApplicationListener {

        private static final Logger LOGGER = LoggerFactory.getLogger(CustomProperties.class);
        private static final String BOOTSTRAP_PROPERTIES = "bootstrapProperties";
        @Autowired
        private ConfigurableEnvironment configurableEnvironment;

        @PostConstruct
        public void loadPropertySources() {
            try {
                final Collection originTrackedMapPropertySources = new ArrayList();
                for (PropertySource propertySource : configurableEnvironment.getPropertySources()) {
                    if (BOOTSTRAP_PROPERTIES.equalsIgnoreCase(propertySource.getName()) && propertySource instanceof OriginTrackedCompositePropertySource) {
                        OriginTrackedCompositePropertySource bootstrapProperties = (OriginTrackedCompositePropertySource) propertySource;
                        for (PropertySource bootstrapPropertiesSource : bootstrapProperties.getPropertySources()) {
                            OriginTrackedCompositePropertySource originTrackedCompositePropertySource = (OriginTrackedCompositePropertySource) bootstrapPropertiesSource;
                            for (PropertySource propertySourceOriginTrackedCompositePropertySource : originTrackedCompositePropertySource.getPropertySources()) {
                                OriginTrackedMapPropertySource originTrackedMapPropertySource = (OriginTrackedMapPropertySource) propertySourceOriginTrackedCompositePropertySource;
                                final String originTrackedMapPropertySourceName = originTrackedMapPropertySource.getName();
                                final Map newPropertySource = new TreeMap();
                                String newPropertySourceName = originTrackedMapPropertySourceName.substring(originTrackedMapPropertySourceName.lastIndexOf('/') + 1, originTrackedMapPropertySourceName.lastIndexOf('.'));
                                newPropertySourceName = newPropertySourceName.toLowerCase().replace('-', '.');
                                for (String propertyName : originTrackedMapPropertySource.getPropertyNames()) {
                                    final Object propertyValue = originTrackedMapPropertySource.getProperty(propertyName);
                                    newPropertySource.put(newPropertySourceName + "." + propertyName, propertyValue);
                                }
                                originTrackedMapPropertySources.add(new OriginTrackedMapPropertySource(newPropertySourceName, newPropertySource));
                            }
                        }
                    }
                }
                //
                for (OriginTrackedMapPropertySource originTrackedMapPropertySource : originTrackedMapPropertySources) {
                    LOGGER.info("PropertySourceName Added: {}", originTrackedMapPropertySource.getName());
                    configurableEnvironment.getPropertySources().addLast(originTrackedMapPropertySource);
                }
                LOGGER.info("Finish properties add");
            } catch (Exception e) {
                LOGGER.error("Ex on configure property sources", e);
            }
        }

        @Override
        public void onApplicationEvent(EnvironmentChangeEvent environmentChangeEvent) {
            loadPropertySources();
        }
    }

在/actuator/refresh 和使用@Value('${you.propertiesname.your.key}') 或@ConfigurationProperties(prefix = "you.propertiesname") 中工作正常

并与 getProperty env 的其他用途一起使用

【讨论】：