[Java知识库]springboot如何获取配置信息

直接上代码：

1，配置文件配置：

gxp:
  info:
    address: 127.0.0.1
    port: 8080
  fruits:
    apple: red
    banner: yellow

2：创建一个实体类，从这里获取配置信息映射
@Data
@ConfigurationProperties(prefix = "gxp")
public class FileProperties {

    private final Info info = new Info();
    private final Fruits fruits = new Fruits();

    @Data
    public static class Info {
        private String address;
        private String port;
    }
    @Data
    public static class Fruits {
        private String apple;
        private String banner;
    }
}

3，创建一个配置类

@Configuration
@EnableConfigurationProperties(FileProperties.class)
public class FileAutoConfigtration {

    public FileProperties.Info info;
    public FileProperties.Fruits fruits;

    public FileAutoConfigtration(FileProperties customizProperties){
        this.info = customizProperties.getInfo();
        this.fruits = customizProperties.getFruits();
    }
}

4，测试

@SpringBootTest
@RunWith(SpringRunner.class)
class Demo1ApplicationTests {

    @Autowired
    FileAutoConfigtration cusomizeAutoConfigtration;
    @Test
    void contextLoads() {
        System.out.println(cusomizeAutoConfigtration.info.getAddress());
        System.out.println(cusomizeAutoConfigtration.fruits.getApple());

    }

}

依赖配置：

lombok依赖：

<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok-maven-plugin -->
<dependency>
? ? <groupId>org.projectlombok</groupId>
? ? <artifactId>lombok-maven-plugin</artifactId>
? ? <version>1.18.18.0</version>
? ? <scope>provided</scope>
</dependency>

@Runwith的依赖：

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

@EnableConfigurationProperties注解作用，加载标注@ConfigurationProperties注解的类，使其注入到spring容器，这是为什么这里不需要注入容器中，因为@EnableConfigurationProperties注解已经帮我们做了。

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