Question

Spring boot 2.0.0.RELEASE

我有属性类：

@Configuration
@ConfigurationProperties(prefix="person")
public class PersonProperties {

    private AddressProperties addressProperties;

    public AddressProperties getAddressProperties() {
        return addressProperties;
    }

    public void setAddressProperties(final AddressProperties addressProperties) {
        this.addressProperties = addressProperties;
    }

    public static class AddressProperties {

        private String line1;

        public String getLine1() {
            return line1;
        }

        public void setLine1(final String line1) {
            this.line1 = line1;
        }
    }

}

application.yml：

person:
  address:
    line1: line1OfAddress

由于我的AddressProperties对象为null，因此无法正确绑定。当一个类与yml属性AddressProperties同名时 - ＆gt; Address它运作良好。我尝试使用前缀Qualifier添加ConfigurationProperties或address，但它无效。不幸的是，我在spring docs中找不到有关此案例的有用信息。

如何为嵌套属性指定前缀？

Answer 1

yaml / property文件中定义的属性应该与类中定义的变量匹配。将yaml文件更改为

person:
  # addressProperties will also work here
  address-properties:
    line1: line1OfAddress

或者将您的bean定义为

@Configuration
@ConfigurationProperties(prefix = "person")
public class PersonProperties {

    // here variable name doesn't matter, it can be addressProperties as well
    // setter / getter should match with properties in yaml
    // i.e. getAddress() and setAddress()
    private AddressProperties address;

    public AddressProperties getAddress() {
        return address;
    }

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

如果您希望获取地址下的所有属性而不在单独的bean中定义它们，您可以将PersonProperties类定义为

@Configuration
@ConfigurationProperties(prefix = "person")
public class PersonProperties {

    private Map<String, Object> address;

    public Map<String, Object> getAddress() {
        return address;
    }

    public void setAddress(Map<String, Object> address) {
        this.address = address;
    }
}

此处PersonProperties#address将包含 {line1 = line1OfAddress}

现在地址下的所有媒体资源都位于Map。

Answer 2

您可以简单地取消嵌套这两个类，使每个类都有自己的前缀。头等舱：

@Configuration
@ConfigurationProperties(prefix="person")
public class PersonProperties {

    private AddressProperties addressProperties;

    public AddressProperties getAddressProperties() {
        return addressProperties;
    }

    public void setAddressProperties(final AddressProperties addressProperties) {
        this.addressProperties = addressProperties;
    }
}

第二堂课

@Configuration
@ConfigurationProperties(prefix="person.address")
public class PersonAddressProperties {

    private String line1;

    public String getLine1() {
        return line1;
    }

    public void setLine1(final String line1) {
        this.line1 = line1;
    }
}

编辑：如注释中所指出，如果需要一个代码块来引用两组属性，则必须注入这两个类。

spring中嵌套配置属性的前缀

2 个答案: