下载插件失败? pom.xml

parent标签下加，表示直接去远程仓库下载

<relativePath/>
比如

    <parent>
        <artifactId>spring-boot-dependencies</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.2.5.RELEASE</version>
        <relativePath/>
    </parent>
    或
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.5.RELEASE</version>
        <relativePath/>
    </parent>