Java 优雅退出程序

下面是工具类，使用的时候直接放到项目中，通过调用registerHook方法来注册退出时的回调，当应用退出时会依次调用注册进去的Runnable实例

import java.util.Queue;
import java.util.concurrent.LinkedBlockingQueue;

/**
 * ShutdownHookUtil
 *
 * @author zhihao.meng
 */
public class AppShutdownHook {
    private static final Queue<Runnable> hooks = new LinkedBlockingQueue<>();

    public static void registerHook(Runnable runnable) {
        hooks.add(runnable);
    }

    static {
        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            hooks.forEach(Runnable::run);
        }));
    }
}