SpringBoot自定义启动器Starter流程详解

package com.decade.autoConfigure.pojo;
import org.springframework.boot.context.properties.ConfigurationProperties;
// 将这个类的属性和系统配置文件中的属性进行绑定
@ConfigurationProperties(prefix = "team")
public class TeamInfo {
    private String winnerName;
    private String loserName;
    public String getWinnerName() {
        return winnerName;
    }
    public void setWinnerName(String winnerName) {
        this.winnerName = winnerName;
    }
    public String getLoserName() {
        return loserName;
    }
    public void setLoserName(String loserName) {
        this.loserName = loserName;
    }
}

package com.decade.autoConfigure.service;
import com.decade.autofigure.pojo.TeamInfo;
import org.springframework.beans.factory.annotation.Autowired;
public class TestService {
	// 引入和yaml文件中配置项绑定的类
    @Autowired
    private TeamInfo teamInfo;
    public String testMethod() {
        return teamInfo.getWinnerName() + "今天早上，绝杀了" + teamInfo.getLoserName();
    }
}

package com.decade.autoConfigure.auto;
import com.decade.autofigure.pojo.TeamInfo;
import com.decade.autofigure.service.TestService;
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;
// 使得TeamInfo中的@ConfigurationProperties注解生效，将TeamInfo注册到容器中
@EnableConfigurationProperties(TeamInfo.class)
@Configuration
public class AutoConfiguration {
    @Bean
    // 只有容器中不存在TestService这个类型的bean时，才回去初始化这个bean
    @ConditionalOnMissingBean(TestService.class)
    public TestService testService() {
        TestService testService = new TestService();
        return testService;
    }
}

package com.decade;
import com.decade.autoConfigure.service.TestService;
import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
@Slf4j
class SpringbootWebApplicationTests {
    @Autowired
    private TestService testService;
    @Test
    public void testCustomStarter() {
        System.out.println(testService.testMethod());
    }
}