springboot外部配置

1、常规属性配置
(1)在application.properties增加属性

server.port=9090
server.context-path=/helloboot

book.author=zxy
book.name=spring boot

(2)修改入口类

    @Value("${book.author}")
    private String author;
    @Value("${book.name}")
    private String name;

    @RequestMapping("/")
    String index(){
        return "hello Spring Boot"+author+" "+name;
    }

（3）访问http://localhost:9090/helloboot

hello Spring Bootzxy spring boot

2、（类型安全配置）基于properties
@Value注入在实际项目显得麻烦，配置通常是多个，
(1)添加配置，在项目资源路径下新建author.properties

author.name=zxy11
author.age=20

(2)新建包com.wisely.config,此包下新建类AuthorSettings
boot1.5以前添加文件是在@ConfigurationProperties里面的lications指定 ，这儿是1.5以上的版本，方法是在PropertySource指定

@Component
@PropertySource("classpath:author.properties")
@ConfigurationProperties(prefix = "author")
public class AuthorSettings {
    private String name;
    private Long age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Long getAge() {
        return age;
    }

    public void setAge(Long age) {
        this.age = age;
    }
}

(3)检验代码

@SpringBootApplication
@RestController
public class ZXYApplication {

    @Autowired
    private AuthorSettings authorSettings;

    @RequestMapping("/")
    public String index(){
        return "author.getName()"+authorSettings.getName()+" author.getAge() "+authorSettings.getAge();
    }

    public static void main(String[] args) {
        SpringApplication.run(ZXYApplication.class, args);
    }
}

(4)运行http://localhost:8080

author.getName()zxy11 author.getAge() 20