SpringBoot中的自定义starter详解

<?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>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.shawn</groupId>
    <artifactId>shawn-spring-boot-starter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>shawn-spring-boot-starter</name>
    <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-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
    </dependencies>
</project>

// 前缀 shawn.hello
@ConfigurationProperties(prefix = "shawn.hello")
public class ShawnProperties {
    /**
     * 前缀
     */
    private String prefix;
    /**
     * 后缀
     */
    private String suffix;
    public String getPrefix() {
        return prefix;
    }
    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }
    public String getSuffix() {
        return suffix;
    }
    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }
}

public class ShawnService {
    ShawnProperties ShawnProperties;
    public ShawnProperties getShawnProperties() {
        return ShawnProperties;
    }
    public void setShawnProperties(ShawnProperties ShawnProperties) {
        this.ShawnProperties = ShawnProperties;
    }
    public String sayHello(String name){
        return ShawnProperties.getPrefix() + name + ShawnProperties.getSuffix();
    }
}

@Configuration
@ConditionalOnWebApplication //web应用生效
@EnableConfigurationProperties(ShawnProperties.class)
public class ShawnServiceAutoConfiguration {
    @Autowired
    ShawnProperties shawnProperties;
    @Bean
    public ShawnService shawnService(){
        ShawnService service = new ShawnService();
        service.setShawnProperties(shawnProperties);
        return service;
    }
}

# Auto Configure
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.shawn.ShawnServiceAutoConfiguration

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

@RestController
public class ShawnCOntroller {
    @Autowired
    ShawnService shawnService;
    @GetMapping("/hello")
    public String hello(){
        return shawnService.sayHello("shawn");
    } 
}

shawn:
  hello:
    prefix: prefix
    suffix: suffix