规范maven项目结构并升级版本号(1.27-SNAPSHOT)

src/main/java/org/csource/fastdfs/DownloadStream.java

@@ -0,0 +1,50 @@
+package org.csource.fastdfs;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import org.csource.fastdfs.DownloadCallback;
+
+/**
+* Download file by stream (download callback class)
+* @author  zhouzezhong & Happy Fish / YuQing
+* @version Version 1.11
+*/
+public class DownloadStream implements DownloadCallback
+{
+	private OutputStream out;
+	private long currentBytes = 0;
+	
+	public DownloadStream(OutputStream out)
+	{
+		super();
+		this.out = out;
+	}
+
+	/**
+	* recv file content callback function, may be called more than once when the file downloaded
+	* @param fileSize file size
+	*	@param data data buff
+	* @param bytes data bytes
+	* @return 0 success, return none zero(errno) if fail
+	*/
+	public int recv(long fileSize, byte[] data, int bytes)
+	{
+		try
+		{
+			out.write(data, 0, bytes);
+		}
+		catch(IOException ex)
+		{
+			ex.printStackTrace(); 
+			return -1;
+		}
+		
+		currentBytes +=	bytes;
+		if (this.currentBytes == fileSize)
+		{
+			this.currentBytes = 0;
+		}
+		
+		return 0;
+	}
+}