fix code

hutool-core/src/main/java/cn/hutool/core/io/IoUtil.java

@@ -296,6 +296,17 @@ public class IoUtil {
 	// -------------------------------------------------------------------------------------- Copy end
 
 	// -------------------------------------------------------------------------------------- getReader and getWriter start
+	/**
+	 * 获得一个文件读取器，默认使用UTF-8编码
+	 *
+	 * @param in 输入流
+	 * @return BufferedReader对象
+	 * @since 5.1.6
+	 */
+	public static BufferedReader getUtf8Reader(InputStream in) {
+		return getReader(in, CharsetUtil.CHARSET_UTF_8);
+	}
+
 	/**
 	 * 获得一个文件读取器
 	 * 
@@ -358,6 +369,17 @@ public class IoUtil {
 		return (reader instanceof PushbackReader) ? (PushbackReader) reader : new PushbackReader(reader, pushBackSize);
 	}
 
+	/**
+	 * 获得一个Writer，默认编码UTF-8
+	 *
+	 * @param out 输入流
+	 * @return OutputStreamWriter对象
+	 * @since 5.1.6
+	 */
+	public static OutputStreamWriter getUtf8Writer(OutputStream out) {
+		return getWriter(out, CharsetUtil.CHARSET_UTF_8);
+	}
+
 	/**
 	 * 获得一个Writer
 	 *