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這期內容當中小編將會給大家帶來有關SpringCloud2020 bootstrap 配置文件失效如何解決,文章內容豐富且以專業的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
問題
之前直接就可以用,而現在,啟動的端口是8080,明顯沒有加載到bootstrap.properties文件,我以為我的文件名字寫錯了,核對了幾次,確認無誤,我猜想估計是bootstramp.properties配置文件沒有生效。
之前的版本:
spring boot 2.3.1.RELEASE
spring cloud Hoxton.SR4
當前版本:
spring boot 2.4.2
spring cloud 2020.0.1
根據上面出現的問題,我使用百度搜索了下,大概的原因知道了:從Spring Boot 2.4版本開始,配置文件加載方式進行了重構。
另外也有配置的默認值變化,如下:
Spring Boot 2.3.8.RELEASE
package org.springframework.cloud.bootstrap; public class BootstrapApplicationListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent>, Ordered { public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) { ConfigurableEnvironment environment = event.getEnvironment(); if ((Boolean)environment.getProperty("spring.cloud.bootstrap.enabled", Boolean.class, true)) {
Spring Boot 2.4.2
package org.springframework.cloud.util; public abstract class PropertyUtils { public static boolean bootstrapEnabled(Environment environment) { return (Boolean)environment.getProperty("spring.cloud.bootstrap.enabled", Boolean.class, false) || MARKER_CLASS_EXISTS; }
其實官網說得很明白。看下面這段:
Config First Bootstrap
To use the legacy bootstrap way of connecting to Config Server, bootstrap must be enabled via a property or the spring-cloud-starter-bootstrap starter. The property is spring.cloud.bootstrap.enabled=true. It must be set as a System Property or environment variable. Once bootstrap has been enabled any application with Spring Cloud Config Client on the classpath will connect to Config Server as follows: When a config client starts, it binds to the Config Server (through the spring.cloud.config.uri bootstrap configuration property) and initializes Spring Environment with remote property sources.The net result of this behavior is that all client applications that want to consume the Config Server need a bootstrap.yml (or an environment variable) with the server address set in spring.cloud.config.uri (it defaults to "http://localhost:8888").
兩個關鍵點:
1、加一個依賴:spring-cloud-starter-bootstrap
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bootstrap</artifactId> </dependency>
2、加一個配置:spring.cloud.config.uri
bootstrap.properties # 應用名稱 spring.application.name=erwin-cloud-user # 啟用環境 spring.profiles.active=dev # 配置文件 spring.cloud.config.label=${spring.application.name} spring.cloud.config.name=${spring.application.name} spring.cloud.config.profile=${spring.profiles.active} spring.cloud.config.uri=http://localhost:9000
現在,你只需要這樣:
application.properties # 應用名稱 spring.application.name=erwin-cloud-user # 啟用環境 spring.profiles.active=dev spring.config.import=optional:configserver:http://localhost:9000 spring.cloud.config.label=${spring.application.name} spring.cloud.config.name=${spring.application.name} spring.cloud.config.profile=${spring.profiles.active}
上述就是小編為大家分享的SpringCloud2020 bootstrap 配置文件失效如何解決了,如果剛好有類似的疑惑,不妨參照上述分析進行理解。如果想知道更多相關知識,歡迎關注億速云行業資訊頻道。
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