Add method newSingleExecutor

pom.xml

@@ -6,7 +6,7 @@
 
 	<groupId>com.xiaoleilu</groupId>
 	<artifactId>hutool</artifactId>
-	<version>2.0.1</version>
+	<version>2.0.2</version>
 	<name>hutool</name>
 	<description>提供最基础的工具类</description>
 	<url>https://github.com/looly/hutool</url>

src/main/java/com/xiaoleilu/hutool/ThreadUtil.java

@@ -7,6 +7,7 @@
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
+import java.util.concurrent.ThreadPoolExecutor;
 
 import com.xiaoleilu.hutool.exceptions.UtilException;
 
@@ -54,6 +55,14 @@ public static ExecutorService newExecutor(){
 		return Executors.newCachedThreadPool();
 	}
 
+	/**
+	 * 获得一个新的线程池，只有单个线程
+	 * @return ExecutorService
+	 */
+	public static ExecutorService newSingleExecutor(){
+		return Executors.newSingleThreadExecutor();
+	}
+
 	/**
 	 * 执行异步方法
 	 * @param runnable 需要执行的方法体
@@ -97,6 +106,11 @@ public static<T> CompletionService<T> newCompletionService(ExecutorService execu
 		return new ExecutorCompletionService<T>(executor);
 	}
 
+	/**
+	 * 新建一个CountDownLatch
+	 * @param threadCount 线程数量
+	 * @return CountDownLatch
+	 */
 	public static CountDownLatch newCountDownLatch(int threadCount) {
 		return new CountDownLatch(threadCount);
 	}