Typesafe Config库，纯Java 零外部依赖 
支持Java properties、JSON、JSON超集格式 HOCON 以及 环境变量
是 play Akka的配置管理库
HOCON(Human-Optimized Config Object Notation)

import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;

// 读取 application.conf
Config conf = ConfigFactory.load();
System.out.println(conf);

Config config = conf.getConfig("os");
System.out.println(config);

// os has type OBJECT rather than STRING
// System.out.println(conf.getString("os"));

System.out.println(conf.getString("os.name"));

System.out.println(conf.getString("name1"));
System.out.println(conf.getString("name2"));

System.out.println(conf.getString("server.ip"));
System.out.println(conf.getString("server.port"));

System.out.println(conf.getString("key1"));
System.out.println(conf.getString("key2"));


application.conf
conf1.conf
conf2.conf


application.conf

include "conf1.conf"
include "conf2"
# 
targetServer=127.0.0.1

server{
ip=${targetServer}
port=8888
}

key1:value1
key2=value2



conf1.conf
name1=name1-value

conf2.conf
name2=name2-value


完整例子代码
https://gitee.com/dyyx/hellocode/tree/master/demo/typesafeConfigDemo