关于springboot中的自定义配置项

@Value("${com.jingt.name.firstName}")
    private String firstName;
    @Value("${com.jingt.name.secondName}")
    private String secondName;
    public String testValue(){
        return firstName + "|" + secondName;
    }

@Autowired
private HelloServices helloServices;
 @Test
    void testValue() {
        System.out.println(helloServices.testValue());
    }

@SpringBootApplication
@PropertySource(value = {"classpath:application_test.properties"})
public class HelloworldApplication {
    public static void main(String[] args) {
        SpringApplication.run(HelloworldApplication.class, args);
    }
}

com.jingt.name.firstName=guo1
com.jingt.name.thirdName=jingt1

@Value("${com.jingt.name.firstName}")
private String firstName;
@Value("${com.jingt.name.thirdName}")
private String secondName;
public String testValue(){
    return firstName + "|" + secondName;
}

com.jingt.name.firstName=guo
com.jingt.name.secondName=jingt

   @Autowired
    private Environment env;
    @Test
    void getEnv(){
        System.out.println(env.getProperty("com.jingt.name.firstName"));
        System.out.println(env.getProperty("com.jingt.name.secondName"));
    }

com.jingt.resource.name=jingt
com.jingt.resource.website=com.jingt.com
com.jingt.resource.language=java

@Configuration
@ConfigurationProperties(prefix = "com.jingt.resource")
@PropertySource(value = "classpath:website.properties")
public class ResourceConfig {
    private String name;
    private String website;
    private String language;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getWebsite() {
        return website;
    }
    public void setWebsite(String website) {
        this.website = website;
    }
    public String getLanguage() {
        return language;
    }
    public void setLanguage(String language) {
        this.language = language;
    }
}

@Autowired
    private ResourceConfig config;
    @Test
    void getResourceConfig(){
        System.out.println(config.getName());
        System.out.println(config.getWebsite());
        System.out.println(config.getLanguage());
    }