java - spring中嵌套配置属性的前缀

Question

Spring 启动 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;
        }
    }

}

和application.yml:

person:
  address:
    line1: line1OfAddress

它没有正确绑定(bind)，因为我的 AddressProperties 对象是 null。 当类与 yml 属性 AddressProperties -> Address 具有相同名称时，它可以正常工作。我尝试添加带有前缀 address 的 Qualifier 或 ConfigurationProperties 但它不起作用。不幸的是，我在 spring 文档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/属性文件中定义的属性应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

或者将你的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;
    }
}

如果您想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;
    }
}

这里PersonProperties#address将包含{line1=line1OfAddress}

现在，地址下的所有属性都将位于 map 中。