14.profiles配置详解

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1，为什么要使用profiles

在开发中，一般有多种环境，例如:

  1. 生产环境
  2. 开发环境

有时候开发环境和生产环境的配置方法是不一样的，那么如何快速的切换呢，这里就要使用profiles文件

2. 使用方法

1，创建applicatin-dev.properties

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server.port=8010

2，创建applicatin-pro.properties

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server.port=8020

3，修改application.properties

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#server.port=8080
spring.profiles.active=prod

spring.profiles.active=dev: 

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2021-03-25 12:13:36.722  INFO 11064 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8010 (http) with context path ''

spring.profiles.active=prod: 

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2021-03-25 12:12:28.874  INFO 10972 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8020 (http) with context path ''

application.properties即使设置了server.port=8080，激活dev/prod，最终加载的是dev/prod的配置。

3. 注解使用方法

DataSource.java

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package com.example.demo.vo;

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

@Data
@NoArgsConstructor
@AllArgsConstructor
public class DataSource {
	
	private String driverClassName;
	private String url;
	private String username;
	private String password;

}

DataSourceConfig.java

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package com.example.demo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;

import com.example.demo.vo.DataSource;

@Configuration
public class DataSourceConfig {
	
	@Bean
	@Profile(value="dev")
	public DataSource getDataSourceDev() {
		DataSource dataSource = new DataSource();
		
		dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
		dataSource.setUrl("jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC");
		dataSource.setUsername("root");
		dataSource.setPassword("123456");
		
		return dataSource;
		
	}
	
	@Bean
	@Profile(value="prod")
	public DataSource getDataSourceProd() {
		DataSource dataSource = new DataSource();
		
		dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
		dataSource.setUrl("jdbc:mysql://192.168.10.132:3306/ping?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC");
		dataSource.setUsername("root");
		dataSource.setPassword("dv*3s;Qdc]p");
		
		return dataSource;
		
	}
}

application.properties

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#server.port=8090

#spring.profiles.active=dev
spring.profiles.active=prod

ApplicationTests.java

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package com.example.demo;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import com.example.demo.vo.DataSource;

@SpringBootTest
class ApplicationTests {
	
	@Autowired
	private DataSource dataSource;

	@Test
	void contextLoads() {
		
		System.out.println(dataSource);
        /*
        1. spring.profiles.active=dev: 

        DataSource(driverClassName=com.mysql.cj.jdbc.Driver, url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC, username=root, password=123456)

        2. spring.profiles.active=prod: 
        DataSource(driverClassName=com.mysql.cj.jdbc.Driver, url=jdbc:mysql://192.168.10.132:3306/ping?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC, username=root, password=dv*3s;Qdc]p)
        */
	}
}

4. 去掉application.properties的运行方式

项目右键->Run As->Run Configuartions...，

在VM arguments输入: 

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-Dspring.profiles.active=dev
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2021-03-25 12:19:20.959  INFO 6148 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8010 (http) with context path ''

5. 去掉application.properties的jar包运行方式

用maven把项目打成jar包，

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java -jar 04_springboot_config_profiles_my-0.0.1-SNAPSHOT.jar --spring.profiles.active=prod

output: 

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2021-03-25 12:45:51.352  INFO 14208 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8020 (http) with context path ''

6. yml文件的多配置块的集成切换

application.yml

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spring:
 profiles:
   active:
   - dev
server:
  port: 8090
  
---

spring:
  profiles: dev
server:
  port: 8010

---

spring:
  profiles: prod
server:
  port: 8020
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# spring:
#  profiles:
#    active:
#    - dev

# output: 2021-03-29 12:24:45.723  INFO 10580 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8090 (http) with context path ''

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spring:
 profiles:
   active:
   - dev

# output: 2021-03-29 12:28:09.479  INFO 10580 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8010 (http) with context path ''
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spring:
 profiles:
   active:
   - prod

# output: 2021-03-29 12:28:56.948  INFO 10580 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8020 (http) with context path ''