地图的配置属性

Question

我在我的spring boot yaml文件中有以下结构：

countryConfiguration:
  NL:
    address:
      postcodeKeyboardType: ALPHANUMERIC
      postcodeExample: 1111 AA
      cityExample: Amsterdam
  ES:
    address:
      postcodeKeyboardType: NUMERIC
      postcodeExample: 11111
      cityExample: Madrid

我想创建一个配置属性类来访问这些值。我有这样的东西：

@Configuration
@ConfigurationProperties
@Validated
public class CountryConfigurationProperties {

    @NotNull
    private Map<String, Configuration> countryConfiguration;

    public Map<String, Configuration> getCountryConfiguration() {
        return countryConfiguration;
    }

    public void setCountryConfiguration(Map<String, Configuration> 
countryConfiguration) {
        this.countryConfiguration = countryConfiguration;
    }

    public static class Configuration {
        private Object address;

        public Object getAddress() {
            return address;
        }

        public void setAddress(Object address) {
            this.address = address;
        }
    }


}

但它不起作用，我得到这样的结论:绑定到目标org.springframework.boot.context.properties.bind.BindException:失败，无法将'‘下的属性绑定到io.bux.onboarding.application.config.CountryConfigurationProperties$$EnhancerBySpringCGLIB$$1d9a5856失败：

Property: .countryConfiguration
Value: null
Reason: must not be null

如果我删除静态内部类配置，并放入Object，它就会工作……

Answer 1

我注意到address字段的类型为Object。我希望它是Address类型，并且应该有一个表示Address对象的内部类。

在下面的代码片段中，我添加了一个Address类来匹配您正在使用的yml配置。我对此进行了测试，它成功启动并相应地映射了属性。

@Validated
@Component
@ConfigurationProperties
public class CountryConfigurationProperties {

    @NotNull
    private Map<String, Configuration> countryConfiguration;

    public Map<String, Configuration> getCountryConfiguration() {
        return countryConfiguration;
    }

    public void setCountryConfiguration(Map<String, Configuration> countryConfiguration) {
        this.countryConfiguration = countryConfiguration;
    }

    public static class Configuration {
        private Address address;

        public Address getAddress() {
            return address;
        }

        public void setAddress(Address address) {
            this.address = address;
        }
    }

    public static class Address {
        private String postcodeKeyboardType;
        private String postcodeExample;
        private String cityExample;

        public String getPostcodeKeyboardType() {
            return postcodeKeyboardType;
        }

        public void setPostcodeKeyboardType(String postcodeKeyboardType) {
            this.postcodeKeyboardType = postcodeKeyboardType;
        }

        public String getPostcodeExample() {
            return postcodeExample;
        }

        public void setPostcodeExample(String postcodeExample) {
            this.postcodeExample = postcodeExample;
        }

        public String getCityExample() {
            return cityExample;
        }

        public void setCityExample(String cityExample) {
            this.cityExample = cityExample;
        }
    }


}