SpringBoot如何通过@Profile注解配置多环境

spring:
  profiles:
  	# 通过active来指定当前所处的开发环境
    active: dev

spring:
  datasource:
    url: jdbc:mysql://localhost/myblog-dev
    username: dev
    password: mysql
    driver-class-name: com.mysql.cj.jdbc.Driver

spring:
  datasource:
    url: jdbc:mysql://localhost/myblog-product
    username: product
    password: mysql
    driver-class-name: com.mysql.cj.jdbc.Driver

import lombok.Builder;
import lombok.Data;
@Builder
@Data
public class DBInfoEntity {
    private String url;
    private String port;
    private String userName;
    private String password;
}

public interface Config {
	// 获取数据库信息
    DBInfoEntity getDBInfo();
	// 获取系统URL
    String getSystemUrl();
}

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
@Configuration("MyConfig")
// 指定开发环境为dev
@Profile("dev")
public class MyConfig1 implements Config {
    @Override
    public DBInfoEntity getDBInfo() {
        return DBInfoEntity.builder()
                .url("https://127.0.0.1")
                .port("8080")
                .userName("devUser")
                .password("110120")
                .build();
    }
    @Override
    public String getSystemUrl() {
        return "https://www.dev.com";
    }
}

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
@Configuration("MyConfig")
// 指定开发环境为product
@Profile("product")
public class MyConfig2 implements Config {
    @Override
    public DBInfoEntity getDBInfo() {
        return DBInfoEntity.builder()
                .url("https://127.0.0.2")
                .port("8089")
                .userName("prodUser")
                .password("999000")
                .build();
    }
    @Override
    public String getSystemUrl() {
        return "https://www.prod.com";
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
@Component
public class Test32Controller implements CommandLineRunner {
	// 注入接口,会自动从IOC容器中获取该接口的实现类
    @Autowired
    private Config config;
    @Override
    public void run(String... args) throws Exception {
        DBInfoEntity dbInfo = config.getDBInfo();
        System.out.println(dbInfo);
        String systemUrl = config.getSystemUrl();
        System.out.println(systemUrl);
    }
}

import org.springframework.context.annotation.Profile;
import java.lang.annotation.*;
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.METHOD})
@Profile("product")
public @interface ProductionAnnotation {
}

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
@Configuration
public class MyConfig3 {
	// 开发环境时,才会注入IOC容器
    @Bean
    @Profile("dev")
    public String getNameDev() {
        return "devName";
    }
	// 生产环境时，才会注入IOC容器
    @Bean
    @ProductionAnnotation  // 相当于 @Profile("product")
    public String getNameProduct() {
        return "productName";
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;
@Component
public class Test32Controller implements CommandLineRunner {
    @Autowired
    private ApplicationContext applicationContext;
    @Override
    public void run(String... args) throws Exception {
        // 判断当前IOC容器中是否存在名称为 getNameDev 的Bean
        boolean getNameDevExist = applicationContext.containsBean("getNameDev");
        if (getNameDevExist) {
            // 从IOC容器中获取出名称为 getNameDev 的Bean
            Object bean1 = applicationContext.getBean("getNameDev");
            System.out.println("目前所在的是开发环境！");
            System.out.println(bean1);
        }
        boolean getNameProductExist = applicationContext.containsBean("getNameProduct");
        if (getNameProductExist) {
            Object bean2 = applicationContext.getBean("getNameProduct");
            System.out.println("目前所在的是生产环境！");
            System.out.println(bean2);
        }
    }
}