SpringBoot线上部署踩坑

偏执的太偏执、 2022-05-28 01:45 196阅读 0赞

> SpringBOOT项目在线上部署时，要么在命令行里添加–spring.profiles.active=prod来指定环境，要么通过maven 打包时动态传参激活–spring.profiles.active=prod,之前对于SpringBOOT的项目部署都是采用命令行方式激活环境分支，现项目集成部署环境，采用的maven -p方式激活环境分支，需将激活的分支变量传递给  
> spring.profiles.active=prod

plugin指定maven打包时需要取得参数，根据参数来设置打包的环境的配置文件  
另外需要建一个application.yml文件指定启动文件环境  
application.yml方式配置如下：

spring:
      profiles:
        active: @profileActive@

<profiles>
            <profile>
                <id>product</id>
                <properties>
                    <profileActive>prod</profileActive>
                </properties>
            </profile>
        </profiles>
        <build>
            <resources>
                <resource> 
                    <directory>src/main/resources</directory>
                    <excludes>
                        <exclude>static/**</exclude>
                    </excludes>
                    <filtering>true</filtering> 
                </resource>
            </resources>
        </build>

**传统的maven 项目在对配置文件中进行占位符替换时，如下开启对某个目录下的文件过滤替换就行，配置文件中占位符为$\{…\},但是在SpringBOOT项目中，配置文件要想从maven中获取环境变量，占位符得是@…@**

<build>
            <resources>
                <resource>
                    <directory>src/main/resources</directory>
                    <filtering>true</filtering>
                </resource>
            </resources>
        </build>

13.2 Maven 
    Maven users can inherit from the spring-boot-starter-parent project to obtain sensible defaults. The parent project provides the following features:
    
    Java 1.6 as the default compiler level. 
    UTF-8 source encoding. 
    A Dependency Management section, allowing you to omit tags for common dependencies, inherited from the spring-boot-dependencies POM. 
    Sensible resource filtering. 
    Sensible plugin configuration (exec plugin, surefire, Git commit ID, shade). 
    Sensible resource filtering for application.properties and application.yml including profile-specific files (e.g. application-foo.properties and application-foo.yml) 
    On the last point: since the default config files accept Spring style placeholders (${…}) the Maven filtering is changed to use @..@ placeholders (you can override that with a Maven property resource.delimiter).

大致的意思是我的maven继承了spring-boot-starter-parent，并且spring默认配置文件接受的占位符也是…，所以mavenfilter\{\}占位符就被spring的maven pom替换掉了，变成了@..@，我们可以通过resource.delimiter来覆盖它。  
看下spring-boot-starter-parent 这个pom里写这一段

<properties>
            <java.version>1.6</java.version>
            <resource.delimiter>@</resource.delimiter> 
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <maven.compiler.source>${java.version}</maven.compiler.source>
            <maven.compiler.target>${java.version}</maven.compiler.target>
        </properties>

[SpringBOOT的相关issues][SpringBOOT_issues]

**总结**：所以Springboot 项目在启动时要么采用命令行方式激活，也可以采用mavan 打包传递参数激活，更多激活方式可以查看SpringBOOT的配置优先级可以参考[ SpringBoot系列(三)内置配置及自定义配置][SpringBoot]

[SpringBOOT_issues]: https://github.com/spring-projects/spring-boot/issues/8689
[SpringBoot]: https://blog.csdn.net/u012834750/article/details/78793978