默认spring装载的都是.properties格式的配置文件，但是有时我们需要定义list或者map类型的配置，那么yaml就具有优势。

以下演示利用apollo来完成自动更新ip白名单的功能

1.重写配置工厂

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); }}

定义-D参数的appid和conf目录

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.装载配置

whiteList.yml

注意本地也要存放上述文件在classpath下

white: ip: #ip白名单列表 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; }); }}

补充知识：yml格式问题

以缩进代表层级关系

空格个数不重要，但是同一层级必须左对齐

大小写敏感

格式为：key= value

注释单行用#，只能注释单行

application.properties中

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

转化为application.yml中

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

冒号后面必须跟空格，否则格式错误

以上这篇spring+apollo动态获取yaml格式的配置方式就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。