add: 递归下载FTP服务器上文件到本地(支持普通ftp和sftp)

hutool-extra/src/test/java/cn/hutool/extra/ftp/FtpTest.java

@@ -2,6 +2,7 @@ package cn.hutool.extra.ftp;
 
 import java.util.List;
 
+import cn.hutool.extra.ssh.Sftp;
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -59,4 +60,25 @@ public class FtpTest {
 
 		IoUtil.close(ftp);
 	}
+
+	@Test
+	@Ignore
+	public void recursiveDownloadFolder() throws Exception {
+		Ftp ftp = new Ftp("looly.centos");
+		ftp.recursiveDownloadFolder("/","d:/test/download");
+
+		IoUtil.close(ftp);
+	}
+
+	@Test
+	@Ignore
+	public void recursiveDownloadFolderSftp() throws Exception {
+		Sftp ftp = new Sftp("127.0.0.1", 22, "test", "test");
+
+		ftp.cd("/file/aaa");
+		Console.log(ftp.pwd());
+		ftp.recursiveDownloadFolder("/","d:/test/download");
+
+		IoUtil.close(ftp);
+	}
 }