SpringBoot中读取application.properties配置文件的方法

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class UserController {
    @Value("${wx.open.app_id}")
    private String appid;
    @Value("${wx.open.app_secret}")
    private String secret;
    @Value("${wx.open.redirect_url}")
    private String url;
    @RequestMapping("hello")
    public String test(){
        return appid+"---"+secret+"---"+url;
    }
}

@Component
@Data
public class WeProperties {
    @Value("${wx.open.app_id}")
    private String appid;
    @Value("${wx.open.app_secret}")
    private String secret;
    @Value("${wx.open.redirect_url}")
    private String url;
}

@RestController
public class UserController {
    @Autowired
    private WeProperties properties;
    @RequestMapping("hello")
    public String test(){
        return properties.getAppid()+"---"+properties.getSecret()+"---"+properties.getUrl();
    }
}

@Component
@ConfigurationProperties(prefix = "wx.open")
@Data
public class WeProperties {
    private String appid;
    private String app_secret;
    private String redirect_url;
}

@RestController
public class UserController {
    @Autowired
    private WeProperties properties;
    @RequestMapping("hello")
    public String test(){
        return properties.getAppid()+"---"+properties.getApp_secret()+"---"+properties.getRedirect_url();
    }
}

@ConfigurationProperties(prefix = "wx.open")
@Data
public class WeProperties {
    private String appid;
    private String app_secret;
    private String redirect_url;
}

@SpringBootApplication
@EnableConfigurationProperties(value = WeProperties.class)
public class PropertiesApplication {
    public static void main(String[] args) {
        SpringApplication.run(PropertiesApplication.class,args);
    }
}

@RestController
public class UserController {
    @Autowired
    private WeProperties properties;
    @RequestMapping("hello")
    public String test(){
        return properties.getAppid()+"---"+properties.getApp_secret()+"---"+properties.getRedirect_url();
    }
}