Springboot使用外部yml启动
有时候我们想更灵活的使用配置文件，例如同一套代码去部署多个客户，此时差异大的地方其实只是配置文件，这是我们希望每次启动项目从外部读取配置文件来加载项目，你可以使用一些配置中心来实现，当然也可以自己定义外部文件来实现。
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import com.ctrip.framework.apollo.Config; import com.ctrip.framework.apollo.ConfigChangeListener; import com.ctrip.framework.apollo.ConfigService; import com.ctrip.framework.apollo.model.ConfigChange; import com.ctrip.framework.apollo.model.ConfigChangeEvent; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.config.YamlPropertiesFactoryBean; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.core.io.FileSystemResource;
import java.util.Properties; import java.util.Set;
@SpringBootApplication @Slf4j public class LitchiDaqApplication { private static Properties PROPERTIES = new Properties();
public static void main(String[] args) { // SpringApplication.run(LitchiDaqApplication.class, args); try { String filePath = System.getProperty("user.dir") + "/config" + "/application-daq.yml"; //此处获取启动参数中的config.id来判断从哪里读取config文件 String configId = System.getProperty("config.id"); if (configId != null) { //从Apollo配置中心获取配置 Config config = ConfigService.getAppConfig(); //监听apollo配置修改 config.addChangeListener(new ConfigChangeListener() { @Override public void onChange(ConfigChangeEvent changeEvent) { log.info("发生改变的工作区: {}", changeEvent.getNamespace()); for (String key : changeEvent.changedKeys()) { ConfigChange change = changeEvent.getChange(key); log.info(String.format("检测到改变 - key: %s, oldValue: %s, newValue: %s, changeType: %s", change.getPropertyName(), change.getOldValue(), change.getNewValue(), change.getChangeType())); } } }); Set<String> keys = config.getPropertyNames(); for (String key : keys) { PROPERTIES.setProperty(key, config.getProperty(key, null)); } } else { YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean(); factory.setResources(new FileSystemResource(filePath)); PROPERTIES = factory.getObject(); } } catch (Exception e) { log.error("项目初始化配置错误：", e); } new SpringApplicationBuilder(LitchiDaqApplication.class).properties(PROPERTIES).run(args); } } |
项目模拟外部文件读取
java -jar启Spring boot项目使用外部yml
配置方式
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java -jar xx.jar --spring.config.location=application.yml路径 |
配置单一变量
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java -jar xxx.jar --xxx=test |
取值
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spring的@value("${xxx}") |
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java -jar .\ydbanew-cases-2.4.16.1.jar -TZ=Asia/Shanghai -filterParam=2400 -appconfig |
