Spring Boot Configuration 配置文件读取以及自定义配置文件

深碍√TFBOYSˉ_ 2022-05-16 12:47 582阅读 0赞

## 添加configuration  maven依赖 ##

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

## 读取核心配置文件application.properties和application.yml ##

在application.properties下添加如下代码

test.name=test
    test.age=22

配置实体类：

第一种：

@Component//使用@Configuration也可以
    public class Test {
        @Value("${test.name}")
        String name;
        @Value("${test.age}")
        String age;
        ...
    }

测试：localhost:8091/   成功获取

![70][]

第二种： 添加前缀读取

@Component
    @ConfigurationProperties(prefix = "test")
    public class Test {
        String name;
        String age;
        ...
    }

测试：localhost:8091/   成功获取

![70][]

启动and测试类

@SpringBootApplication
    @RestController
    public class SpringCloudConfigServerApplication {
    	@Autowired
    	private Test test;
    	@RequestMapping("/")
    	public Map<String, Object> sayHello() {
    		Map<String, Object> result = new HashMap<String, Object>();
    		result.put("name", test.getName());
    		result.put("age", test.getAge());
    		return result;
    	}
    	public static void main(String[] args) {
    		SpringApplication.run(SpringCloudConfigServerApplication.class, args);
    	}
    }

### 读取自定义配置文件 ###

创建test.properties,内容如下：

test.name=chen
    test.age=22

需要添加@PropertySource注解  获取文件路径 （String \[\] value();） 可以扫描多个

@Component
    @ConfigurationProperties(prefix = "test")
    @PropertySource(value = "classpath:test.properties")
    public class Test {
        String name;
        String age;
        ...
    }

测试：localhost:8091

![70 1][]

### 多环境配置文件加载 ###

application-dev.properties：开发环境   
application-test.properties：测试环境   
application-prod.properties：生产环境

创建多个配置文件：

![70 2][]

在application.properties 中通过spring.profiles.active=\{profile\}来设置加载对应的环境配置文件

spring.profiles.active=prod

![70 3][]

测试：

![70 4][]

基本就是这样了。

## Sping Boot Configuration的加载顺序： ##

1.  [Devtools global settings properties][] on your home directory (`~/.spring-boot-devtools.properties` when devtools is active).
2.  [`@TestPropertySource`][TestPropertySource] annotations on your tests.
3.  [`@SpringBootTest#properties`][SpringBootTest_properties] annotation attribute on your tests.
4.  Command line arguments.
5.  Properties from `SPRING_APPLICATION_JSON` (inline JSON embedded in an environment variable or system property).
6.  `ServletConfig` init parameters.
7.  `ServletContext` init parameters.
8.  JNDI attributes from `java:comp/env`.
9.  Java System properties (`System.getProperties()`).
10. OS environment variables.
11. A `RandomValuePropertySource` that has properties only in `random.*`.
12. [Profile-specific application properties][] outside of your packaged jar (`application-{profile}.properties` and YAML variants).
13. [Profile-specific application properties][] packaged inside your jar (`application-{profile}.properties` and YAML variants).
14. Application properties outside of your packaged jar (`application.properties` and YAML variants).
15. Application properties packaged inside your jar (`application.properties` and YAML variants).
16. [`@PropertySource`][PropertySource] annotations on your `@Configuration` classes.
17. Default properties (specified by setting `SpringApplication.setDefaultProperties`).

参考spring boot官方文档：https://docs.spring.io/spring-boot/docs/2.0.4.RELEASE/reference/htmlsingle/\#boot-features-external-config

[Spring Boot 配置优先级顺序][Spring Boot]：[https://www.cnblogs.com/softidea/p/5759180.html][Spring Boot]

[application.yml和 bootstrap.yml区别][application.yml_ bootstrap.yml]：[https://www.cnblogs.com/BlogNetSpace/p/8469033.html][application.yml_ bootstrap.yml]

[70]: /images/20220516/97df2dabca2c4d20ba5334e75a2d5eb8.png
[70 1]: /images/20220516/b4a38b433a0244dcb28c09ba032aba7d.png
[70 2]: /images/20220516/0ed80d9b48194ccfba45a553743ed6db.png
[70 3]: /images/20220516/e164b50cbd6c4caeb7f9161c787e68e3.png
[70 4]: /images/20220516/0ebddeb0dd274c14b72dc71d70dee371.png
[Devtools global settings properties]: https://docs.spring.io/spring-boot/docs/2.0.4.RELEASE/reference/htmlsingle/#using-boot-devtools-globalsettings
[TestPropertySource]: https://docs.spring.io/spring/docs/5.0.8.RELEASE/javadoc-api/org/springframework/test/context/TestPropertySource.html
[SpringBootTest_properties]: https://docs.spring.io/spring-boot/docs/2.0.4.RELEASE/api/org/springframework/boot/test/context/SpringBootTest.html
[Profile-specific application properties]: https://docs.spring.io/spring-boot/docs/2.0.4.RELEASE/reference/htmlsingle/#boot-features-external-config-profile-specific-properties
[PropertySource]: https://docs.spring.io/spring/docs/5.0.8.RELEASE/javadoc-api/org/springframework/context/annotation/PropertySource.html
[Spring Boot]: https://www.cnblogs.com/softidea/p/5759180.html
[application.yml_ bootstrap.yml]: https://www.cnblogs.com/BlogNetSpace/p/8469033.html