@ConfigurationProperties+@EnableConfigurationProperties详解

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目录

概 述

首先在配置配置文件：

connection.username=admin
connection.password=kyjufskifas2jsfs
connection.remoteAddress=192.168.1.1

定义一个实体类在装载配置文件信息：

@Component
@ConfigurationProperties(prefix="connection")
public class ConnectionSettings {

    private String username;
    private String remoteAddress;
    private String password ;

    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getRemoteAddress() {
        return remoteAddress;
    }
    public void setRemoteAddress(String remoteAddress) {
        this.remoteAddress = remoteAddress;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

}

我们还可以把@ConfigurationProperties还可以直接定义在@bean的注解上，这是bean实体类就不用@Component和@ConfigurationProperties了。

@SpringBootApplication
public class DemoApplication{

    //...

    @Bean
    @ConfigurationProperties(prefix = "connection")
    public ConnectionSettings connectionSettings(){
        return new ConnectionSettings();

    }

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

然后需要使用的时候就直接在这样的注入：

@RestController
@RequestMapping("/task")
public class TaskController {

@Autowired ConnectionSettings conn;

@RequestMapping(value = {"/",""})
public String hellTask(){
    String userName = conn.getUsername();     
    return "hello task !!";
}

}

如果发现@ConfigurationPropertie不生效，有可能是项目的目录结构问题，你可以通过，你可以通过@EnableConfigurationProperties(ConnectionSettings.class)来明确指定需要用哪个实体类来装载配置信息。

创建方式

总结：

相关工具如下：

分析：

小结：

yml配置文件、加载顺序、配置原理~

参考资料和推荐阅读

1.链接: (https://blog.youkuaiyun.com/yingxiake/article/details/51263071).