默認spring裝載的都是.properties格式的配置文件，但是有時我們需要定義list或者map類型的配置，那么yaml就具有優勢。

以下演示利用apollo來完成自動更新ip白名單的功能

1.重寫配置工廠

public class YmlPropertySourceFactory extends DefaultPropertySourceFactory { public PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException { String configName = resource.getResource().getFilename(); ConfigFile configFile = ConfigService.getConfigFile(configName.substring(0, configName.indexOf('.')), ConfigFileFormat.YML); String ct = configFile.getContent(); return YamlPropUtil.buildYaml(configName, ct); }}

定義-D參數的appid和conf目錄

public class YamlPropUtil { public static PropertySource buildYaml(String name, String content) throws IOException { String sysName = System.getProperty('app.id'); String appDir = System.getProperty('apollo.cacheDir'); if (appDir.endsWith(File.separator)) { appDir= appDir.substring(0, appDir.length() - 1); } String filePath = appDir+ File.separator + sysName + File.separator + name; File file = new File(filePath); if (file.exists()) { file.delete(); } try (BufferedWriter bufferedWriter = Files.newWriter(file, Charsets.UTF_8)) { bufferedWriter.write(content); bufferedWriter.flush(); List<PropertySource<?>> sources = new YamlPropertySourceLoader().load(name, new FileSystemResource(filePath)); return sources.get(0); } catch (IOException e) { throw e; } }}

2.裝載配置

whiteList.yml

注意本地也要存放上述文件在classpath下

white: ip: #ip白名單列表 list: - 192.168.103.34 - 192.168.1.102@Configuration@ConfigurationProperties(prefix = 'white.ip')@PropertySource(value = 'classpath:whiteList.yml', factory = YmlPropertySourceFactory.class)@Slf4jpublic class IpWhiteListService { private List<String> list; private final static int MAX_PROP_ITEM = 1000; private final static String PROP_NAME = 'whiteList.yml'; private final static String KEY_PREFIX = 'white.ip.list'; public void setList(List<String> list) { this.list = list; } public boolean isAllow(String address) { return list.contains(address); } @ApolloConfigChangeListener(PROP_NAME) public void onChange(ConfigChangeEvent changeEvent) { Set<String> keys = changeEvent.changedKeys(); keys.forEach(e -> { String newVal = changeEvent.getChange(e).getNewValue(); log.debug('whiteList is changed={}', newVal); String ct = newVal; org.springframework.core.env.PropertySource propertySource = null; try { propertySource = YamlPropUtil.buildYaml(PROP_NAME, ct); } catch (IOException ex) { log.error('', e); } List<String> newList = Lists.newArrayList(); for (int i = 0; i < MAX_PROP_ITEM; i++) { String pName = KEY_PREFIX + '[' + i + ']'; if (propertySource.containsProperty(pName)) { String val = (String) propertySource.getProperty(pName); newList.add(val); } } list = newList; }); }}

補充知識：yml格式問題

以縮進代表層級關系

空格個數不重要，但是同一層級必須左對齊

大小寫敏感

格式為：key= value

注釋單行用#，只能注釋單行

application.properties中

logging.level.root=DEBUGlogging.level.org.springframework=DEBUGlogging.level.org.org.mybatis=DEBUG

轉化為application.yml中

logging:level:root: DEBUGorg.springframework: DEBUGorg.org.mybatis: DEBUG

冒號后面必須跟空格，否則格式錯誤

以上這篇spring+apollo動態獲取yaml格式的配置方式就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持好吧啦網。