Spring手动绑定ConfigurationProperties

Spring加载ConfigurationProperties的典型应用是自动加载（Autowired），在一些特殊的场景需要手动修改加载的Property属性。

代码实例，config类

import java.util.ArrayList;
import java.util.List;

import org.springframework.boot.context.properties.ConfigurationProperties;

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

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

    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;
    }
}

DeviceConfig类代码用到的DeviceDetailsProperties，测试演示只有id

public class DeviceDetailsProperties {
    String id;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }
    @Override
    public String toString() {
        return id;
    }
}

测试代码类

import java.util.Properties;

import org.springframework.boot.bind.PropertiesConfigurationFactory;

public class Test {

    public static void main(String[] args) throws Exception {
        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<DeviceConfig>(conf);
        pcf.setProperties(props);
        pcf.setTargetName("devices");
        
        conf = pcf.getObject();
        System.out.println(conf.getImports());
        System.out.println(conf.getDefinitions());
    }

}

运行结果：