diff --git a/hutool-core/src/main/java/cn/hutool/core/io/IoUtil.java b/hutool-core/src/main/java/cn/hutool/core/io/IoUtil.java
index 5a6a9fad3..e8daa41a8 100644
--- a/hutool-core/src/main/java/cn/hutool/core/io/IoUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/IoUtil.java
@@ -97,6 +97,7 @@ public class IoUtil extends NioUtil {
 	 * @param reader         Reader
 	 * @param writer         Writer
 	 * @param bufferSize     缓存大小
+	 * @param count          最大长度
 	 * @param streamProgress 进度处理器
 	 * @return 传输的byte数
 	 * @throws IORuntimeException IO异常
diff --git a/hutool-core/src/main/java/cn/hutool/core/io/NioUtil.java b/hutool-core/src/main/java/cn/hutool/core/io/NioUtil.java
index f2d13b4b8..2db343457 100644
--- a/hutool-core/src/main/java/cn/hutool/core/io/NioUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/NioUtil.java
@@ -63,6 +63,7 @@ public class NioUtil {
 	 * @param in             输入流
 	 * @param out            输出流
 	 * @param bufferSize     缓存大小
+	 * @param count          最大长度
 	 * @param streamProgress 进度条
 	 * @return 传输的byte数
 	 * @throws IORuntimeException IO异常
diff --git a/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java b/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java
index 61204ab53..b477a892e 100755
--- a/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java
@@ -28,9 +28,9 @@ public abstract class IoCopier<S, T> {
 	/**
 	 * 构造
 	 *
-	 * @param bufferSize   缓存大小，&lt; 0 表示默认{@link IoUtil#DEFAULT_BUFFER_SIZE}
-	 * @param count    拷贝总数，-1表示无限制
-	 * @param progress 进度条
+	 * @param bufferSize 缓存大小，&lt; 0 表示默认{@link IoUtil#DEFAULT_BUFFER_SIZE}
+	 * @param count      拷贝总数，-1表示无限制
+	 * @param progress   进度条
 	 */
 	public IoCopier(int bufferSize, long count, StreamProgress progress) {
 		this.bufferSize = bufferSize > 0 ? bufferSize : IoUtil.DEFAULT_BUFFER_SIZE;
@@ -49,9 +49,11 @@ public abstract class IoCopier<S, T> {
 
 	/**
 	 * 缓存大小，取默认缓存和目标长度最小值
+	 *
+	 * @param count 目标长度
 	 * @return 缓存大小
 	 */
 	protected int bufferSize(long count) {
-		return (int)Math.min(this.bufferSize, count);
+		return (int) Math.min(this.bufferSize, count);
 	}
 }