application.properties有以下这几条数据
方法一：@Value注解+@Component
建议properties少的时候用，多的时候就不要使用这种方法了
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("${wx.open.redirect_url}")
private String url;
@RequestMapping("hello")
public String test(){
return appid+"---"+secret+"---"+url;
}
}
另一种方法
创建一个WeProperties
@Component
@Data
public class WeProperties {
@Value("${wx.open.app_id}")
private String appid;
@Value("${wx.open.app_secret}")
private String secret;
@Value("${wx.open.redirect_url}")
private String url;
}
Controller层
@RestController
public class UserController {
@Autowired
private WeProperties properties;
@RequestMapping("hello")
public String test(){
return properties.getAppid()+"---"+properties.getSecret()+"---"+properties.getUrl();
}
}
方法二：@Component+@ConfigurationProperties
创建一个WeProperties
后面的属性名一定要保持一致
@Component
@ConfigurationProperties(prefix = "wx.open")
@Data
public class WeProperties {
private String appid;
private String app_secret;
private String redirect_url;
}
Controller层
@RestController
public class UserController {
@Autowired
private WeProperties properties;
@RequestMapping("hello")
public String test(){
return properties.getAppid()+"---"+properties.getApp_secret()+"---"+properties.getRedirect_url();
}
}
方法三：@ConfigurationProperties+@EnableConfigurationProperties
创建一个WeProperties
后面的属性名一定要保持一致
@ConfigurationProperties(prefix = "wx.open")
@Data
public class WeProperties {
private String appid;
private String app_secret;
private String redirect_url;
}
启动类添加@EnableConfigurationProperties
@SpringBootApplication
@EnableConfigurationProperties(value = WeProperties.class)
public class PropertiesApplication {
public static void main(String[] args) {
SpringApplication.run(PropertiesApplication.class,args);
}
}
Controller层
@RestController
public class UserController {
@Autowired
private WeProperties properties;
@RequestMapping("hello")
public String test(){
return properties.getAppid()+"---"+properties.getApp_secret()+"---"+properties.getRedirect_url();
}
}
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