启动springboot时报错:Could not resolve placeholder ‘spring.datasource.url‘ in value “${spring.datasource.

rebuild不管用,mvn clean install也不管用,检查了一下target目录下没有properties配置文件
所以时打包的时候配置文件没打包进去.解决方案:
pom文件中添加:

<resources>
    <resource>
        <directory>src/main/java</directory>
        <includes>
            <include>**/*.xml</include>
        </includes>
    </resource>
    <resource>
        <directory>src/main/resources</directory>
        <includes>
            <include>**/*.*</include>  <!--打包properties文件-->
        </includes>
    </resource>
</resources>