这期内容当中小编将会给大家带来有关SpringCloud2020 bootstrap 配置文件失效如何解决,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
问题
之前直接就可以用,而现在,启动的端口是8080,明显没有加载到bootstrap.properties文件,我以为我的文件名字写错了,核对了几次,确认无误,我猜想估计是bootstramp.properties配置文件没有生效。
之前的版本:
spring boot 2.3.1.RELEASE
spring cloud Hoxton.SR4
当前版本:
spring boot 2.4.2
spring cloud 2020.0.1
根据上面出现的问题,我使用百度搜索了下,大概的原因知道了:从Spring Boot 2.4版本开始,配置文件加载方式进行了重构。
另外也有配置的默认值变化,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; }
其实官网说得很明白。看下面这段:
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").
两个关键点:
1、加一个依赖:spring-cloud-starter-bootstrap
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bootstrap</artifactId> </dependency>
2、加一个配置:spring.cloud.config.uri
bootstrap.properties # 应用名称 spring.application.name=erwin-cloud-user # 启用环境 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=${spring.profiles.active} spring.cloud.config.uri=http://localhost:9000
现在,你只需要这样:
application.properties # 应用名称 spring.application.name=erwin-cloud-user # 启用环境 spring.profiles.active=dev spring.config.import=optional:configserver:http://localhost:9000 spring.cloud.config.label=${spring.application.name} spring.cloud.config.name=${spring.application.name} spring.cloud.config.profile=${spring.profiles.active}
上述就是小编为大家分享的SpringCloud2020 bootstrap 配置文件失效如何解决了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。
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