diff --git a/hutool-core/src/main/java/cn/hutool/core/io/FastByteArrayOutputStream.java b/hutool-core/src/main/java/cn/hutool/core/io/FastByteArrayOutputStream.java
index a27cace9d..088db9ee0 100644
--- a/hutool-core/src/main/java/cn/hutool/core/io/FastByteArrayOutputStream.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/FastByteArrayOutputStream.java
@@ -1,6 +1,7 @@
 package cn.hutool.core.io;
 
 import cn.hutool.core.util.CharsetUtil;
+import cn.hutool.core.util.ObjectUtil;
 
 import java.io.IOException;
 import java.io.OutputStream;
@@ -90,7 +91,7 @@ public class FastByteArrayOutputStream extends OutputStream {
 
 	@Override
 	public String toString() {
-		return new String(toByteArray());
+		return toString(CharsetUtil.defaultCharset());
 	}
 
 	/**
@@ -104,11 +105,12 @@ public class FastByteArrayOutputStream extends OutputStream {
 	
 	/**
 	 * 转为字符串
-	 * @param charset 编码
+	 * @param charset 编码,null表示默认编码
 	 * @return 字符串
 	 */
 	public String toString(Charset charset) {
-		return new String(toByteArray(), charset);
+		return new String(toByteArray(),
+				ObjectUtil.defaultIfNull(charset, CharsetUtil.defaultCharset()));
 	}
 
 }
\ No newline at end of file
diff --git a/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartFormData.java b/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartFormData.java
index aa1ba0e79..76a12178f 100644
--- a/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartFormData.java
+++ b/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartFormData.java
@@ -2,7 +2,6 @@ package cn.hutool.core.net.multipart;
 
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.convert.Convert;
-import cn.hutool.core.io.IoUtil;
 import cn.hutool.core.map.multi.ListValueMap;
 
 import java.io.IOException;
@@ -78,7 +77,7 @@ public class MultipartFormData {
 				putFile(header.formFieldName, newFile);
 			} else {
 				// 标准表单项
-				putParameter(header.formFieldName, IoUtil.read(input, charset));
+				putParameter(header.formFieldName, input.readString(charset));
 			}
 
 			input.skipBytes(1);
diff --git a/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java b/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java
index 08d7fbacb..12acf6b6e 100644
--- a/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java
+++ b/hutool-core/src/main/java/cn/hutool/core/net/multipart/MultipartRequestInputStream.java
@@ -1,5 +1,7 @@
 package cn.hutool.core.net.multipart;
 
+import cn.hutool.core.io.FastByteArrayOutputStream;
+
 import java.io.BufferedInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -144,7 +146,20 @@ public class MultipartRequestInputStream extends BufferedInputStream {
 	// ---------------------------------------------------------------- copy
 
 	/**
-	 * 全部字节流复制到out
+	 * 读取字节流，直到下一个boundary
+	 *
+	 * @param charset 编码，null表示系统默认编码
+	 * @return 读取的字符串
+	 * @throws IOException 读取异常
+	 */
+	public String readString(Charset charset) throws IOException {
+		final FastByteArrayOutputStream out = new FastByteArrayOutputStream();
+		copy(out);
+		return out.toString(charset);
+	}
+
+	/**
+	 * 字节流复制到out，直到下一个boundary
 	 *
 	 * @param out 输出流
 	 * @return 复制的字节数
diff --git a/hutool-http/src/test/java/cn/hutool/http/test/DownloadTest.java b/hutool-http/src/test/java/cn/hutool/http/DownloadTest.java
similarity index 95%
rename from hutool-http/src/test/java/cn/hutool/http/test/DownloadTest.java
rename to hutool-http/src/test/java/cn/hutool/http/DownloadTest.java
index 777ca9495..823f01d0c 100644
--- a/hutool-http/src/test/java/cn/hutool/http/test/DownloadTest.java
+++ b/hutool-http/src/test/java/cn/hutool/http/DownloadTest.java
@@ -1,4 +1,4 @@
-package cn.hutool.http.test;
+package cn.hutool.http;
 
 import cn.hutool.core.io.FileUtil;
 import cn.hutool.core.io.IORuntimeException;
diff --git a/hutool-http/src/test/java/cn/hutool/http/test/HtmlUtilTest.java b/hutool-http/src/test/java/cn/hutool/http/HtmlUtilTest.java
similarity index 96%
rename from hutool-http/src/test/java/cn/hutool/http/test/HtmlUtilTest.java
rename to hutool-http/src/test/java/cn/hutool/http/HtmlUtilTest.java
index 66eb9421e..2103b71ce 100644
--- a/hutool-http/src/test/java/cn/hutool/http/test/HtmlUtilTest.java
+++ b/hutool-http/src/test/java/cn/hutool/http/HtmlUtilTest.java
@@ -1,4 +1,4 @@
-package cn.hutool.http.test;
+package cn.hutool.http;
 
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/hutool-http/src/test/java/cn/hutool/http/test/HttpRequestTest.java b/hutool-http/src/test/java/cn/hutool/http/HttpRequestTest.java
similarity index 95%
rename from hutool-http/src/test/java/cn/hutool/http/test/HttpRequestTest.java
rename to hutool-http/src/test/java/cn/hutool/http/HttpRequestTest.java
index bf00b18ff..2dc9e487d 100644
--- a/hutool-http/src/test/java/cn/hutool/http/test/HttpRequestTest.java
+++ b/hutool-http/src/test/java/cn/hutool/http/HttpRequestTest.java
@@ -1,4 +1,4 @@
-package cn.hutool.http.test;
+package cn.hutool.http;
 
 import cn.hutool.core.date.DateUtil;
 import cn.hutool.core.date.TimeInterval;
diff --git a/hutool-http/src/test/java/cn/hutool/http/test/HttpUtilTest.java b/hutool-http/src/test/java/cn/hutool/http/HttpUtilTest.java
similarity index 96%
rename from hutool-http/src/test/java/cn/hutool/http/test/HttpUtilTest.java
rename to hutool-http/src/test/java/cn/hutool/http/HttpUtilTest.java
index 201605cae..3cc5d25c1 100644
--- a/hutool-http/src/test/java/cn/hutool/http/test/HttpUtilTest.java
+++ b/hutool-http/src/test/java/cn/hutool/http/HttpUtilTest.java
@@ -1,4 +1,4 @@
-package cn.hutool.http.test;
+package cn.hutool.http;
 
 import cn.hutool.core.io.FileUtil;
 import cn.hutool.core.lang.Console;
diff --git a/hutool-http/src/test/java/cn/hutool/http/test/HttpsTest.java b/hutool-http/src/test/java/cn/hutool/http/HttpsTest.java
similarity index 91%
rename from hutool-http/src/test/java/cn/hutool/http/test/HttpsTest.java
rename to hutool-http/src/test/java/cn/hutool/http/HttpsTest.java
index fca3e6cc1..a2eef2416 100644
--- a/hutool-http/src/test/java/cn/hutool/http/test/HttpsTest.java
+++ b/hutool-http/src/test/java/cn/hutool/http/HttpsTest.java
@@ -1,4 +1,4 @@
-package cn.hutool.http.test;
+package cn.hutool.http;
 
 import cn.hutool.core.lang.Console;
 import cn.hutool.core.thread.ThreadUtil;
diff --git a/hutool-http/src/test/java/cn/hutool/http/test/RestTest.java b/hutool-http/src/test/java/cn/hutool/http/RestTest.java
similarity index 94%
rename from hutool-http/src/test/java/cn/hutool/http/test/RestTest.java
rename to hutool-http/src/test/java/cn/hutool/http/RestTest.java
index 4a43c05c6..100d4e201 100644
--- a/hutool-http/src/test/java/cn/hutool/http/test/RestTest.java
+++ b/hutool-http/src/test/java/cn/hutool/http/RestTest.java
@@ -1,4 +1,4 @@
-package cn.hutool.http.test;
+package cn.hutool.http;
 
 import cn.hutool.core.lang.Console;
 import cn.hutool.http.Header;
diff --git a/hutool-http/src/test/java/cn/hutool/http/test/UploadTest.java b/hutool-http/src/test/java/cn/hutool/http/UploadTest.java
similarity index 58%
rename from hutool-http/src/test/java/cn/hutool/http/test/UploadTest.java
rename to hutool-http/src/test/java/cn/hutool/http/UploadTest.java
index 6a8e151bd..e0817c180 100644
--- a/hutool-http/src/test/java/cn/hutool/http/test/UploadTest.java
+++ b/hutool-http/src/test/java/cn/hutool/http/UploadTest.java
@@ -1,23 +1,23 @@
-package cn.hutool.http.test;
+package cn.hutool.http;
 
 import cn.hutool.core.io.FileUtil;
 import cn.hutool.core.lang.Console;
-import cn.hutool.http.HttpRequest;
-import cn.hutool.http.HttpResponse;
-import cn.hutool.http.HttpUtil;
 import org.junit.Ignore;
 import org.junit.Test;
 
 import java.io.File;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.HashMap;
+import java.util.Map;
 
 /**
  * 文件上传单元测试
- * @author looly
  *
+ * @author looly
  */
 public class UploadTest {
-	
+
 	/**
 	 * 多文件上传测试
 	 */
@@ -35,7 +35,7 @@ public class UploadTest {
 		HttpResponse response = request.execute();
 		Console.log(response.body());
 	}
-	
+
 	@Test
 	@Ignore
 	public void uploadFileTest() {
@@ -48,4 +48,24 @@ public class UploadTest {
 		String result = HttpUtil.post("http://wthrcdn.etouch.cn/weather_mini", paramMap);
 		System.out.println(result);
 	}
+
+	@Test
+	@Ignore
+	public void uploadTest() {
+		//客户端
+		String url = "http://localhost:8888/file";
+		Path file = Paths.get("D:\\testBigData_upload.xlsx");
+		Map<String, String> headers = new HashMap<>(16);
+		headers.put("md5", "aaaaaaaa");
+
+		Map<String, Object> params = new HashMap<>(16);
+		params.put("fileName", file.toFile().getName());
+		params.put("file", file.toFile());
+		HttpRequest httpRequest = HttpRequest.post(url)
+				.setChunkedStreamingMode(1024 * 1024)
+				.headerMap(headers, false)
+				.form(params);
+		HttpResponse httpResponse = httpRequest.execute();
+		Console.log(httpResponse);
+	}
 }