自定义starter

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 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>3.2.8</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yiyi</groupId>
    <artifactId>register-spring-boot-starter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>register-spring-boot-starter</name>
    <description>Demo project for Spring Boot</description>
    <url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <optional>true</optional><!--表示依赖不可传递-->
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
<!--            <plugin>-->
<!--                <groupId>org.springframework.boot</groupId>-->
<!--                <artifactId>spring-boot-maven-plugin</artifactId>-->
<!--                <configuration>-->
<!--                    <excludes>-->
<!--                        <exclude>-->
<!--                            <groupId>org.projectlombok</groupId>-->
<!--                            <artifactId>lombok</artifactId>-->
<!--                        </exclude>-->
<!--                    </excludes>-->
<!--                </configuration>-->
<!--            </plugin>-->
        </plugins>
    </build>

</project>

大致结构

org.springframework.boot.autoconfigure.AutoConfiguration.imports

如果是SpringBoot2.7之前

在META-INF下新建spring.factories

package com.yiyi.registerspringbootstarter.config;


import com.yiyi.registerspringbootstarter.service.RegisterService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableConfigurationProperties(RegisterProperties.class)
public class RegisterAutoConfiguration {

    @Autowired
    private  RegisterProperties registerProperties;

    @Bean
    @ConditionalOnMissingBean(RegisterService.class)
    public RegisterService createRegisterConfiguration(){

        return  new RegisterService(registerProperties.getUsername(),registerProperties.getPassword(),registerProperties.getTelephone());
    }


}

package com.yiyi.registerspringbootstarter.config;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "register.user")
@Data
@NoArgsConstructor
@AllArgsConstructor
public class RegisterProperties {
    private String username="admin";
    private String password="123456";
    private String telephone;


}

package com.yiyi.registerspringbootstarter.service;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class RegisterService {
    private String username;
    private String password;
    private String telephone;

    public void register(){
        System.out.println("注册成功！你的注册信息如下：");
        System.out.println("用户名："+username);
        System.out.println("密码："+password);
        System.out.println("电话："+telephone);
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getTelephone() {
        return telephone;
    }

    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }

}

install打包到本地仓库  其他项目可以引入了

在配置文件中

register.user.username=xxxx

register.user.password=xxxx

register.user.telephone=xxxx

不配置就是默认值

不引入web也可以  这个就够了

 <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-autoconfigure</artifactId>
                </dependency>

<?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>3.2.8</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yiyi</groupId>
    <artifactId>register-spring-boot-starter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>register-spring-boot-starter</name>
    <description>Demo project for Spring Boot</description>
    <url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
<!--        <dependency>-->
<!--            <groupId>org.springframework.boot</groupId>-->
<!--            <artifactId>spring-boot-starter-web</artifactId>-->
<!--            <optional>true</optional>&lt;!&ndash;表示依赖不可传递&ndash;&gt;-->
<!--        </dependency>-->
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-autoconfigure</artifactId>
                </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
<!--            <plugin>-->
<!--                <groupId>org.springframework.boot</groupId>-->
<!--                <artifactId>spring-boot-maven-plugin</artifactId>-->
<!--                <configuration>-->
<!--                    <excludes>-->
<!--                        <exclude>-->
<!--                            <groupId>org.projectlombok</groupId>-->
<!--                            <artifactId>lombok</artifactId>-->
<!--                        </exclude>-->
<!--                    </excludes>-->
<!--                </configuration>-->
<!--            </plugin>-->
        </plugins>
    </build>

</project>