添加项目文件。

2026-08-06 09:23:30 +08:00
parent 771e23e00a
commit 4660ceee70
604 changed files with 138380 additions and 0 deletions
@@ -0,0 +1,127 @@
+using System;
+using System.IO;
+
+namespace JinYuan.Helper
+{
+    /// <summary>
+    /// 流读写IO辅助类
+    /// </summary>
+    public class StreamIOHelper
+    {
+        /// <summary>
+        /// 写入文件字节流
+        /// </summary>
+        /// <param name="stream">待写入的流</param>
+        /// <param name="bys">写入的文件流</param>
+        /// <param name="isCloseStream">是否在操作后关闭流</param>
+        /// <returns>是否写入成功:true:成功;false:失败</returns>
+        public static bool WriteStreamBytes(Stream stream, byte[] bys, bool isCloseStream = false)
+        {
+            //确保文件支持写入
+            if (stream == null || !stream.CanWrite)
+            {
+                return false;
+            }
+
+            try
+            {
+                //单次写入的长度
+                int perWriteByteLen = 1024 * 1024;
+                //单次读取的索引下标
+                int startIndex = 0;
+                //写入的总长度
+                int allLen = bys.Length;
+                while (startIndex < allLen && startIndex >= 0)
+                {
+                    stream.Write(bys, startIndex, (startIndex > allLen - perWriteByteLen) ? allLen - startIndex : perWriteByteLen);
+                    startIndex += perWriteByteLen;
+                }
+                stream.Flush();
+                return true;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message + "\t" + ex.StackTrace);
+                return false;
+            }
+            finally
+            {
+                if (isCloseStream)
+                {
+                    CloseStream(stream);
+                }
+            }
+        }
+
+        /// <summary>
+        /// 读取文件字节流
+        /// 读取异常或者文件不存在时返回null;
+        /// </summary>
+        /// <param name="stream">读取的字节流</param>
+        /// <param name="isCloseStream">是否在操作后关闭流</param>
+        /// <returns>读取到的文件字节流</returns>
+        public static byte[] ReadStreamBytes(Stream stream, bool isCloseStream = false)
+        {
+            //检测是否支持读操作
+            if (stream == null || !stream.CanRead || stream.Length == 0)
+            {
+                return null;
+            }
+
+            try
+            {
+                byte[] resBytes = new byte[stream.Length];
+                int allLen = (int)stream.Length;
+                //单次读取的长度,1024字节即1kb，1024*1024=1M
+                int perReadByteLen = 1024 * 1024;
+                //单次读取的索引下标
+                int startIndex = 0;
+                //单次读取到的长度
+                int readLen = 0;
+                while ((readLen = stream.Read(resBytes, startIndex, (startIndex > allLen - perReadByteLen) ? allLen - startIndex : perReadByteLen)) > 0)
+                {
+                    startIndex += readLen;
+                }
+                if (startIndex == allLen)
+                {
+                    return resBytes;
+                }
+                else
+                {
+                    return ArrayHelper.GetSubArray<byte>(resBytes, 0, startIndex);
+                }
+
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message + "\t" + ex.StackTrace);
+                return null;
+            }
+            finally
+            {
+                if (isCloseStream)
+                {
+                    CloseStream(stream);
+                }
+            }
+        }
+
+        /// <summary>
+        /// 关闭流 
+        /// </summary>
+        /// <param name="fileInfo"></param>
+        public static void CloseStream(Stream fileInfo)
+        {
+            try
+            {
+                if (fileInfo != null)
+                    fileInfo.Dispose();
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message + "\t" + ex.StackTrace);
+            }
+        }
+
+    }
+}