SpringBoot 2 元素未绑定 [英] SpringBoot 2 the elements were left unbound

问题描述

我的 Spring Boot 应用程序有一个文件 application.yml，它不愿意运行.

i have a file application.yml with my Spring Boot application which is not willing to run.

根据日志原因，元素 [simulator.geo.b12,simulator.geo.b13,simulator.geo.b21,simulator.geo.c6,simulator.geo.host] 未绑定.然而，这个属性是在 application.yml 中设置的，编译器甚至会返回它的值.

According to logs the reason of The elements [simulator.geo.b12,simulator.geo.b13,simulator.geo.b21,simulator.geo.c6,simulator.geo.host] were left unbound. This property however is set in application.yml and compiler is even returning it's value.

如果有人能帮我解决这个问题，我将不胜感激.

I'll really appreciate if someone could lend me a hand with that issue.

simulator:
    geo:
        host: http://localhost:8080/
        b12: http://localhost:8080/geo/b12
        b13: http://localhost:8080/geo/b13
        b21: http://localhost:8080/geo/b21
        c6: http://localhost:8080/geo/c6

和java类

@Getter
@Configuration
@ConfigurationProperties(prefix = "simulator",ignoreUnknownFields = false)
public class VendorSimulatorProperties {

    @Value("${simulator.geo.host:http://localhost:8080/}")
    private String initUrl;

    @Value("${simulator.geo.b12}")
    private String geoB12Url;

    @Value("${simulator.geo.b13}")
    private String geoB13Url;

    @Value("${simulator.geo.b21}")
    private String geoB21Url;

    @Value("${simulator.geo.c6}")
    private String geoC6Url;
}

当我开始运行应用程序时，我收到错误消息:

when i start to run application, i got the error msg :

**************************
APPLICATION FAILED TO START
***************************

Description:

Binding to target [Bindable@1c140c7c type = com.mathartsys.dlc.thirdparty.vendor.config.VendorSimulatorProperties$$EnhancerBySpringCGLIB$$eb0a550b, value = 'provided', annotations = array<Annotation>[@org.springframework.boot.context.properties.ConfigurationProperties(prefix=simulator, value=simulator, ignoreUnknownFields=false, ignoreInvalidFields=false)]] failed:

    Property: simulator.geo.b12
    Value: http://localhost:8080/geo/b12
    Origin: class path resource [config/application-dev.yml]:204:14
    Reason: The elements [simulator.geo.b12,simulator.geo.b13,simulator.geo.b21,simulator.geo.c6,simulator.geo.host] were left unbound.
    Property: simulator.geo.b13
    Value: http://localhost:8080/geo/b13
    Origin: class path resource [config/application-dev.yml]:205:14
    Reason: The elements [simulator.geo.b12,simulator.geo.b13,simulator.geo.b21,simulator.geo.c6,simulator.geo.host] were left unbound.
    Property: simulator.geo.b21
    Value: http://localhost:8080/geo/b21
    Origin: class path resource [config/application-dev.yml]:206:14
    Reason: The elements [simulator.geo.b12,simulator.geo.b13,simulator.geo.b21,simulator.geo.c6,simulator.geo.host] were left unbound.
    Property: simulator.geo.c6
    Value: http://localhost:8080/geo/c6
    Origin: class path resource [config/application-dev.yml]:207:13
    Reason: The elements [simulator.geo.b12,simulator.geo.b13,simulator.geo.b21,simulator.geo.c6,simulator.geo.host] were left unbound.
    Property: simulator.geo.host
    Value: http://localhost:8080/
    Origin: class path resource [config/application-dev.yml]:203:15
    Reason: The elements [simulator.geo.b12,simulator.geo.b13,simulator.geo.b21,simulator.geo.c6,simulator.geo.host] were left unbound.

这个问题困扰我很久了，希望有人能给我一些建议；我用的是 springboot 2.0谢谢

this problem had confuse me long time, i hope someone can give me some advice; i used springboot 2.0 thanks

推荐答案

问题在于您以错误的方式使用了 @ConfigurationProperties.您可以使用 @ConfigurationProperties 或 @Value，但不能同时使用两者.

The problem is that you are using the @ConfigurationProperties in a wrong way. You use either @ConfigurationProperties or @Value but not both.

解决方案要么修复您的类以供 @ConfigurationProperties 使用，要么删除 @ConfigurationProperties 注释.

The solution either fix your class to be usable for @ConfigurationProperties or remove the @ConfigurationProperties annotation.

@Getter
@Setter
@Component
@ConfigurationProperties(prefix = "simulator.geo",ignoreUnknownFields = false)
public class VendorSimulatorProperties {

    private String host = "http://localhost:8080/";
    private String b12;
    private String b13;
    private String b21;
    private String c6;

}

您需要修复 prefix 它应该是 simulator.geo 并且您的属性应该以您文件中的键命名.您还需要 getter 旁边的 setter.但是，这还需要更改其余配置，以使用新生成的 getter.

You need to fix the prefix it should be simulator.geo and your properties should be named after the keys in your file. You will also require setter next to the getter. However this will also need to change the rest of your configuration, to use the newly generated getters.

对您来说，删除 @ConfigurationProperties 可能更容易，因为您一开始并没有真正使用它们.

For you it is probably easier to remove @ConfigurationProperties as you weren't really using them in the first place.

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