2023-09-14  阅读(99)
原文作者:王伟王胖胖 原文地址: https://blog.csdn.net/wangwei19871103/article/details/105465589

自定义starter

pom.xml

创建一个新的springboot工程pom文件如下:

    <?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.2.6.RELEASE</version>
            <relativePath/> <!-- lookup parent from repository -->
        </parent>
        <groupId>com.ww</groupId>
        <artifactId>myfirst-spring-boot-starter</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <description>Demo project for Spring Boot</description>
    
        <properties>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-configuration-processor</artifactId>
                <optional>true</optional>
            </dependency>
    
        </dependencies>
    </project>

ControllerProperties属性类

ConfigurationProperties注解可以在配置文件中配置了,前缀就是mycp

    @ConfigurationProperties(prefix = "mycp")
    public class ControllerProperties {
        @Value("hello")
        private String msg;
    
        public String getMsg() {
            return msg;
        }
    
        public void setMsg(String msg) {
            this.msg = msg;
        }
    }

StarterAutoConfiguration自动装配类

    @Configuration
    @EnableConfigurationProperties(ControllerProperties.class)
    public class StarterAutoConfiguration {
    
        @Bean
        public StarterController starterController(ControllerProperties controllerProperties) {
            return new StarterController(controllerProperties.getMsg());
        }
    }

StarterController控制器,测试用

    public class StarterController {
    
        private String msg;
    
        public StarterController(String msg){
            this.msg=msg;
        }
    
        public void hello() {
            System.out.println(msg);
        }
    }

添加spring.factories

202309142259209821.png
内容为自动装配类全限定名。

    org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
    com.ww.starter.StarterAutoConfiguration

安装到本地仓库

可以用maveninstall

202309142259217852.png

202309142259228653.png

测试

在其他项目中引入:

     <dependency>
                <groupId>com.ww</groupId>
                <artifactId>myfirst-spring-boot-starter</artifactId>
                <version>0.0.1-SNAPSHOT</version>
     </dependency>

202309142259237884.png
运行:

202309142259248415.png
输出了默认值:

202309142259264836.png
我们在配置文件修改试试:

202309142259272557.png

202309142259279748.png
至此我们自定义了一个starter,其实步骤也很简单,定义自动配置类,创建spring.factories并配置进去,创建属性配置类,添加相应的注解,打包发布,其他项目可以引用。

当然这个是最简单的实践,实际项目和业务肯定还要复杂,懂原理了就不是什么难题了。

好了,今天就到这里了,希望对学习理解有帮助,大神看见勿喷,仅为自己的学习理解,能力有限,请多包涵。

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