diff --git a/hutool-core/src/main/java/org/dromara/hutool/core/io/IoUtil.java b/hutool-core/src/main/java/org/dromara/hutool/core/io/IoUtil.java
index 10421b86a..685690d2f 100644
--- a/hutool-core/src/main/java/org/dromara/hutool/core/io/IoUtil.java
+++ b/hutool-core/src/main/java/org/dromara/hutool/core/io/IoUtil.java
@@ -849,8 +849,8 @@ public class IoUtil extends NioUtil {
 	 * @throws IORuntimeException IO异常
 	 * @since 3.1.1
 	 */
-	public static void writeUtf8(final OutputStream out, final boolean isCloseOut, final Object... contents) throws IORuntimeException {
-		write(out, CharsetUtil.UTF_8, isCloseOut, contents);
+	public static void writeUtf8(final OutputStream out, final boolean isCloseOut, final CharSequence... contents) throws IORuntimeException {
+		writeStrs(out, CharsetUtil.UTF_8, isCloseOut, contents);
 	}
 
 	/**
@@ -863,8 +863,8 @@ public class IoUtil extends NioUtil {
 	 * @throws IORuntimeException IO异常
 	 * @since 3.0.9
 	 */
-	public static void write(final OutputStream out, final Charset charset, final boolean isCloseOut, final Object... contents) throws IORuntimeException {
-		StreamWriter.of(out, isCloseOut).writeStr(charset, contents);
+	public static void writeStrs(final OutputStream out, final Charset charset, final boolean isCloseOut, final CharSequence... contents) throws IORuntimeException {
+		StreamWriter.of(out, isCloseOut).writeStrs(charset, contents);
 	}
 
 	/**
@@ -876,7 +876,7 @@ public class IoUtil extends NioUtil {
 	 * @throws IORuntimeException IO异常
 	 */
 	public static void writeObjects(final OutputStream out, final boolean isCloseOut, final Object... contents) throws IORuntimeException {
-		StreamWriter.of(out, isCloseOut).writeObj(contents);
+		StreamWriter.of(out, isCloseOut).writeObjs(contents);
 	}
 	// endregion ----------------------------------------------------------------------------------------------- write
 
diff --git a/hutool-core/src/main/java/org/dromara/hutool/core/io/stream/StreamWriter.java b/hutool-core/src/main/java/org/dromara/hutool/core/io/stream/StreamWriter.java
index a5737f58b..98217988f 100644
--- a/hutool-core/src/main/java/org/dromara/hutool/core/io/stream/StreamWriter.java
+++ b/hutool-core/src/main/java/org/dromara/hutool/core/io/stream/StreamWriter.java
@@ -12,10 +12,8 @@
 
 package org.dromara.hutool.core.io.stream;
 
-import org.dromara.hutool.core.convert.Convert;
 import org.dromara.hutool.core.io.IORuntimeException;
 import org.dromara.hutool.core.io.IoUtil;
-import org.dromara.hutool.core.text.StrUtil;
 
 import java.io.IOException;
 import java.io.ObjectOutputStream;
@@ -80,7 +78,7 @@ public class StreamWriter {
 	 * @param contents 写入的内容
 	 * @throws IORuntimeException IO异常
 	 */
-	public void writeObj(final Object... contents) throws IORuntimeException {
+	public void writeObjs(final Object... contents) throws IORuntimeException {
 		ObjectOutputStream osw = null;
 		try {
 			osw = out instanceof ObjectOutputStream ? (ObjectOutputStream) out : new ObjectOutputStream(out);
@@ -106,13 +104,13 @@ public class StreamWriter {
 	 * @param contents 写入的内容，调用toString()方法，不包括不会自动换行
 	 * @throws IORuntimeException IO异常
 	 */
-	public void writeStr(final Charset charset, final Object... contents) throws IORuntimeException {
+	public void writeStrs(final Charset charset, final CharSequence... contents) throws IORuntimeException {
 		OutputStreamWriter osw = null;
 		try {
 			osw = IoUtil.toWriter(out, charset);
-			for (final Object content : contents) {
+			for (final CharSequence content : contents) {
 				if (content != null) {
-					osw.write(Convert.toStr(content, StrUtil.EMPTY));
+					osw.write(content.toString());
 				}
 			}
 			osw.flush();
diff --git a/hutool-http/src/main/java/org/dromara/hutool/http/client/body/MultipartOutputStream.java b/hutool-http/src/main/java/org/dromara/hutool/http/client/body/MultipartOutputStream.java
index 0c8158f73..2e213c503 100644
--- a/hutool-http/src/main/java/org/dromara/hutool/http/client/body/MultipartOutputStream.java
+++ b/hutool-http/src/main/java/org/dromara/hutool/http/client/body/MultipartOutputStream.java
@@ -107,19 +107,19 @@ public class MultipartOutputStream extends OutputStream {
 
 		if (value instanceof Resource) {
 			appendResource(formFieldName, (Resource) value);
-		}else if(value instanceof File) {
+		} else if (value instanceof File) {
 			appendResource(formFieldName, new FileResource((File) value));
-		}else if(value instanceof Path) {
+		} else if (value instanceof Path) {
 			appendResource(formFieldName, new FileResource((Path) value));
-		} else if(value instanceof byte[]) {
+		} else if (value instanceof byte[]) {
 			appendResource(formFieldName, new BytesResource((byte[]) value));
-		} else if(value instanceof InputStream) {
+		} else if (value instanceof InputStream) {
 			appendResource(formFieldName, new InputStreamResource((InputStream) value));
-		} else if(value instanceof Reader) {
+		} else if (value instanceof Reader) {
 			appendResource(formFieldName, new InputStreamResource((Reader) value, this.charset));
 		} else {
 			appendResource(formFieldName,
-					new StringResource(Convert.toStr(value), null, this.charset));
+				new StringResource(Convert.toStr(value), null, this.charset));
 		}
 
 		write(StrUtil.CRLF);
@@ -178,11 +178,11 @@ public class MultipartOutputStream extends OutputStream {
 		} else if (StrUtil.isNotEmpty(fileName)) {
 			// 根据name的扩展名指定互联网媒体类型，默认二进制流数据
 			write(StrUtil.format(CONTENT_TYPE_FILE_TEMPLATE,
-					FileUtil.getMimeType(fileName, ContentType.OCTET_STREAM.getValue())));
+				FileUtil.getMimeType(fileName, ContentType.OCTET_STREAM.getValue())));
 		}
 
 		// 内容
-		write("\r\n");
+		write(StrUtil.CRLF);
 		resource.writeTo(this);
 	}
 
@@ -200,9 +200,9 @@ public class MultipartOutputStream extends OutputStream {
 	/**
 	 * 写出对象
 	 *
-	 * @param objs 写出的对象（转换为字符串）
+	 * @param contents 写出的字符串
 	 */
-	private void write(final Object... objs) {
-		IoUtil.write(this, this.charset, false, objs);
+	private void write(final CharSequence... contents) {
+		IoUtil.writeStrs(this, this.charset, false, contents);
 	}
 }