Spring Boot 配置与jar分开的一种实现方式

Spring Boot 配置与jar分离的一种实现方式
最近项目中遇到一个问题，就是要把Spring Boot 的jar包与配置分离
(不仅仅是application.xml)


咱们费活少说，上maven配置

<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                        <mainClass>com.xxx.Application</mainClass>
                        </manifest>
                        <manifestEntries>
                            <Class-Path>/srv/service-jar/xxx-config/</Class-Path>
                        </manifestEntries>
                    </archive>
                    <excludes>
                        <exclude>application*.properties</exclude>
                        <exclude>logback.xml</exclude>
                        <exclude>validator/**</exclude>
                        <exclude>product/**</exclude>
                        <exclude>groovy/**</exclude>
                    </excludes>
                </configuration>
            </plugin>

注意此处
    <manifestEntries>
        <Class-Path>/srv/service-jar/xxx-config/</Class-Path>
      </manifestEntries>
你会发现打完jar包后 

xxx.jar的 META-INF/MANIFEST.MF
多出一项Class-Path: /srv/service-jar/xxx-config/

没错
就是这样来改变classpath