JAVA获取application.yml配置文件的属性值

application.yml配置参数

方式一：使用@Value方式(常用)

语法

@Value("${配置文件中的key:默认值}")
@Value("${配置文件中的key}")

方法1：使用的类文件中定义变量，直接使用变量

import org.springframework.beans.factory.annotation.Value;

@Value("${baseProperties.factory}")
private String sysFactory;
@Value("${baseProperties.factory-name}")
private String sysFactoryName;

public ResponseData test() {
   System.out.println(sysFactory +";"+sysFactoryName);
   return new SuccessResponseData();
}

　方法2：定义在配置类中，通过引入ApplicationConfig的对象读取数据

import com.holly.api.base.pojo.vo.ApplicationVO;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ApplicationConfig {

    @Value("${baseProperties.factory}")
    private String factory;
    @Value("${baseProperties.factory-name}")
    private String factoryName;

    @Bean
    public ApplicationVO getFactoryInfo() {
        ApplicationVO vo = new ApplicationVO();
        vo.setFactory(factory);
        vo.setFactoryName(factoryName);
        return vo;
    }
}

方式二：使用@ConfigurationProperties方式

 注意：

1、需要把配置类文件添加进去才可以引入； 

@Configuration

2、set和get方法需要保留，set方法不加static

3、Controller类文件读取null，但Service实现类可以取值；(原因不知道)

@Configuration@ConfigurationProperties(prefix = "baseProperties")
public class BaseProperties {

    private static String factory;

    private static String factoryName;

    public static String getFactory() {
        return factory;
    }

    public void setFactory(String factory) {
        BaseProperties.factory = factory;
    }

    public static String getFactoryName() {
        return factoryName;
    }

    public  void setFactoryName(String factoryName) {
        BaseProperties.factoryName = factoryName;
    }
}

方式三：使用Environment方式

import org.springframework.core.env.Environment;
@Autowiredprivate Environment environment;
public ResponseData test() {
    System.out.println("env:" + environment.getProperty("baseProperties.factory"));
    System.out.println("env:" + environment.getProperty("baseProperties.factory-name"));
    return new SuccessResponseData();
}