如何使用Spring的PropertiesConfigurationFactory從yaml中讀取對象列表？

Question

如果我有一組屬性，我知道Springboot的寬松數據綁定器將讀取屬性列表（或yaml）並填充匹配的對象。 像這樣：

Properties props = new Properties();
props.put("devices.imports[0]","imp1");
props.put("devices.imports[1]","imp2");
props.put("devices.definitions[0].id","first");
props.put("devices.definitions[1].id", "second");

DeviceConfig conf = new DeviceConfig();
PropertiesConfigurationFactory<DeviceConfig> pcf = new PropertiesConfigurationFactory<>(conf);
pcf.setProperties(props);

conf = pcf.getObject();
assertThat(conf.getDefinitions()).hasSize(2); //Definitions is coming in as 0 instead of the expected 2

DeviceConfig看起來像這樣：

@ConfigurationProperties(prefix="devices")
public class DeviceConfig {

    private List<String> imports = new ArrayList<>();
    private List<DeviceDetailsProperties> definitions = new ArrayList<>();

    public List<String> getImports() {
        return this.imports;
    }

    public List<DeviceDetailsProperties> getDefinitions() {
        return definitions;
    }

    public void setImports(List<String> imports) {
        this.imports = imports;
    }

    public void setDefinitions(List<DeviceDetailsProperties> definitions) {
        this.definitions = definitions;
    }
}

DeviceDetailsProperties僅有一個帶有getters / setter的id字段。

奇怪的是，定義（對象）或導入（字符串）都沒有被填充。

使用SpringBoot 1.2.0.RELEASE

Answer 1

當以這種手動方式使用PropertiesConfigurationFactory時，它不會自動在注釋中使用prefix值。

添加目標targetName如下所示：

pcf.setTargetName("devices");

更正后的代碼將是：

Properties props = new Properties();
props.put("devices.imports[0]","imp1");
props.put("devices.imports[1]","imp2");
props.put("devices.definitions[0].id","first");
props.put("devices.definitions[1].id", "second");

DeviceConfig conf = new DeviceConfig();
PropertiesConfigurationFactory<DeviceConfig> pcf = new PropertiesConfigurationFactory<>(conf);
pcf.setProperties(props);
pcf.setTargetName("devices"); // <--- Add this line

conf = pcf.getObject();
assertThat(conf.getDefinitions()).hasSize(2);