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  • Spring Boot开启的2种方式

    Spring Boot依赖

    使用Spring Boot很简单,先添加基础依赖包,有以下两种方式

    1. 继承spring-boot-starter-parent项目

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.6.RELEASE</version>
    </parent>

    2. 导入spring-boot-dependencies项目依赖

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.6.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
    </dependencyManagement>

    Spring Boot依赖注意点

    1. 属性覆盖只对继承有效

    This only works if your Maven project inherits (directly or indirectly) from spring-boot-dependencies. If you have added spring-boot-dependencies in your own dependencyManagement section with import you have to redefine the artifact yourself instead of overriding the property.

    Spring Boot依赖包里面的组件的版本都是和当前Spring Boot绑定的,如果要修改里面组件的版本,只需要添加如下属性覆盖即可,但这种方式只对继承有效,导入的方式无效。

    <properties>
        <slf4j.version>1.7.25<slf4j.version>
    </properties>

    如果导入的方式要实现版本的升级,达到上面的效果,这样也可以做到,把要升级的组件依赖放到Spring Boot之前。

    <dependencyManagement>
        <dependencies>
            <!-- Override Spring Data release train provided by Spring Boot -->
            <dependency>
                <groupId>org.springframework.data</groupId>
                <artifactId>spring-data-releasetrain</artifactId>
                <version>Fowler-SR2</version>
                <scope>import</scope>
                <type>pom</type>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.6.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    Each Spring Boot release is designed and tested against a specific set of third-party dependencies. Overriding versions may cause compatibility issues.

    需要注意,要修改Spring Boot的依赖组件版本可能会造成不兼容的问题。

    2. 资源文件过滤问题

    使用继承Spring Boot时,如果要使用Maven resource filter过滤资源文件时,资源文件里面的占位符为了使${}和Spring Boot区别开来,此时要用@…@包起来,不然无效。另外,@…@占位符在yaml文件编辑器中编译报错,所以使用继承方式有诸多问题,坑要慢慢趟。

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  • 原文地址:https://www.cnblogs.com/java-stack/p/11952631.html
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