@ConfigurationProperties进行配置绑定

springboot进行开发中，需要将配置文件里的数据绑定到javabean中，可以使用@ConfigurationProperties注解方便的进行绑定

首先准备两个javabean

@Data
public class Address {

    private String province;
    private String city;
}

@Data
public class Student {

    private String name;
    private Integer age;
    private Address address;
}

在配置文件中对javabean进行配置信息

student.name=李磊
student.age=30
student.address.province=广东
student.address.city=深圳

对User类进行加注解@ConfigurationProperties(prefix = "user")和@Component

@ConfigurationProperties(prefix = "user")表示该类与配置文件中以“user”为前缀的配置信息进行绑定；

@Component表示将该JavaBean注入到容器中。

@Data
@Component
@ConfigurationProperties(prefix = "student")
public class Student {

    private String name;
    private Integer age;
    private Address address;
}

测试效果

@Controller
public class LoginController {

    @Autowired
    private Student student;

    @ResponseBody
    @GetMapping("/getstu")
    public Student getStu(){
        return student;
    }

}

运行后访问本机localhost:8080/getuser

得到结果：

 

注：如果为引用的其他模块的类，在类上无法添加注解@Component

可在配置类上引用@EnableConfigurationProperties(Student.class)注解将Student类注入容器

@Configuration(proxyBeanMethods = true)
@EnableConfigurationProperties(Student.class)
public class MyConfig {