Sringboot 自定义启动器

开门见山：

1、创建项目：

2、配置pom文件

autoconfigure模块：（引入starter和processor依赖）

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.sam.antass</groupId>
    <artifactId>antass-spring-boot-starter-autoconfigure</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
        <relativePath/>
    </parent>

    <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>
        </dependency>
    </dependencies>

</project>

starter模块：（引入“antass-spring-boot-starter-autoconfigure”依赖）

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.sam.antass</groupId>
    <artifactId>antass-spring-boot-starter</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>cn.sam.antass</groupId>
            <artifactId>antass-spring-boot-starter-autoconfigure</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

3、项目文件：

AntassProperties:

@ConfigurationProperties(prefix = "antass.config")
public class AntassProperties {
    private Boolean enable;

    public Boolean getEnable() {
        return enable;
    }

    public void setEnable(Boolean enable) {
        this.enable = enable;
    }
}

AntassService:

public class AntassService {
    AntassProperties properties;

    public Boolean config() {
        return properties.getEnable();
    }

    public AntassProperties getProperties() {
        return properties;
    }

    public void setProperties(AntassProperties properties) {
        this.properties = properties;
    }
}

AntassAutoConfiguration:

@Configuration
@ConditionalOnWebApplication
@EnableConfigurationProperties(AntassProperties.class)
public class AntassAutoConfiguration {
    @Autowired
    private AntassProperties properties;

    @Bean
    public AntassService antassService() {
        AntassService service = new AntassService();
        service.setProperties(properties);
        return service;
    }
}

3、新建META文件（resources\META-INF\spring.factories），配置自动加载类

# Auto Configure
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
cn.sam.antass.AntassAutoConfiguration

4、将antass-spring-boot-starter-autoconfigure和antass-spring-boot-starter模块按顺序安装进maven仓库

5、再其它项目中引入：

<dependency>
        <groupId>cn.sam.antass</groupId>
        <artifactId>antass-spring-boot-starter</artifactId>
        <version>1.0-SNAPSHOT</version>
</dependency>

6、配置：(application.yml)

antass:
  config:
    enable: false

7、使用：

@Autowired
private AntassService antassService;

8、测试：

@GetMapping("/antass")
public String testAntass() {
    return String.valueOf(antassService.config());
}