修改：工程结构变更为 maven 工程

src/main/java/net/tccn/timer/queue/TimerQueue.java

@@ -0,0 +1,105 @@
+package net.tccn.timer.queue;
+
+import net.tccn.timer.task.Task;
+
+import java.util.LinkedList;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * Created by liangxianyou at 2018/7/23 14:07.
+ */
+public class TimerQueue {
+    private ReentrantLock lock = new ReentrantLock();
+    private Condition isEmpty = lock.newCondition();
+    private LinkedList<Task> queue = new LinkedList();
+
+    /**
+     * 新加调度任务
+     *
+     * @param task
+     */
+    public void push(Task task) {
+        try {
+            lock.lock();
+            remove(task.getName());
+            int inx = queue.size();//目标坐标
+            while (inx > 0 && queue.get(inx - 1).theTime() > task.theTime()) {
+                inx--;
+            }
+
+            queue.add(inx, task);
+            isEmpty.signal();
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    /**
+     * 调度等待执行的任务
+     *
+     * @return
+     * @throws InterruptedException
+     */
+    public Task take() throws InterruptedException {
+        try {
+            lock.lock();
+            while (queue.size() == 0) {
+                isEmpty.await();
+            }
+
+            long currentTime = System.currentTimeMillis();
+            long nextTime = queue.getFirst().theTime();
+
+            if (currentTime >= nextTime) {
+                return queue.removeFirst();
+            } else {
+                isEmpty.await(nextTime - currentTime, TimeUnit.MILLISECONDS);
+                return take();
+            }
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    /**
+     * 删除指定名称的任务
+     *
+     * @param name
+     * @return
+     */
+    public Task remove(String name) {
+        return get(name, true);
+    }
+
+    /**
+     * 返回指定名称的任务
+     *
+     * @param name
+     * @return
+     */
+    public Task get(String name) {
+        return get(name, false);
+    }
+
+    private Task get(String name, boolean remove) {
+        try {
+            lock.lock();
+            Task take = null;
+            for (int i = 0; i < queue.size(); i++) {
+                if (name.equals(queue.get(i).getName())) {
+                    take = queue.get(i);
+                }
+            }
+            if (remove && take != null) {
+                queue.remove(take);
+            }
+
+            isEmpty.signal();
+            return take;
+        } finally {
+            lock.unlock();
+        }
+    }
+}