SpringBoot访问windows共享文件
前言最近有项目需要开发档案打包下载功能，其中包含很多大附件，项目使用minio存储且不在同一台服务器上，为了优化速度决定使用windows共享功能进行文件传输
SMB1.0
集成jcifs类库，主要适用于一些老旧系统，但下载速度比较慢，仅作参考
此类库没有maven引用，官网地址：http://jcifs.samba.org/
注意事项：
设置jcifs.smb.client.dfs.disabled选项开启，可以提高传输速度
使用NtlmPasswordAuthentication认证代替smb协议url携带用户名密码方式，避免特殊字符传递造成认证失败
public static void downloadFile(String ip, String shareFolder, String filePath, String localDir) throws Exception {
System.setProperty("jcifs.smb.client.dfs.disabled", "true");
String url = getFileUrl(ip, shareFolder, filePath);
SmbFile smbFile = new SmbFile(url);
smbFile.connect();
FileUtil.initfloderPath(localDir);
String localFilePath = localDir + "/" + smbFile.getName();
BufferedInputStream buf = new BufferedInputStream(new SmbFileInputStream(smbFile));
FileUtil.writeFile(localFilePath, FileUtil.convertStreamToByte(buf));
}
public static void downloadFileByAuth(String ip, String shareFolder, String userName, String password, String filePath, String localDir) throws Exception {
System.setProperty("jcifs.smb.client.dfs.disabled", "true");
String url = getFileUrl(ip, shareFolder, filePath);
NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication(ip, userName, password);
SmbFile smbFile = new SmbFile(url, auth);
smbFile.connect();
FileUtil.initfloderPath(localDir);
String localFilePath = localDir + "/" + smbFile.getName();
BufferedInputStream buf = new BufferedInputStream(new SmbFileInputStream(smbFile));
FileUtil.writeFile(localFilePath, FileUtil.convertStreamToByte(buf));
}
public static String getFileUrl(String ip, String shareFolder, String filePath) {
return "smb://" + ip + "/" + shareFolder + "/" + filePath;
}SMB2.0
集成smbj类库，适用于windows server2012及以上操作系统，默认安装开启无需额外配置
此类库maven引用很久没有发布最新版本，需要下载代码自行编译，github地址：https://github.com/hierynomus/smbj
经测试，500MB文件传输大概比minio协议传输快了4秒左右，小文件传输速度基本保持一致
public static void downloadFileV2(String ip, String shareFolder, String filePath, String localDir) throws Exception {
SMBClient client = new SMBClient(SmbConfig.createDefaultConfig());
Connection conn = client.connect(ip);
Session session = conn.authenticate(AuthenticationContext.anonymous());
downLoadSMB2(session, shareFolder, filePath, localDir);
}
public static void downloadFileByAuthV2(String ip, String shareFolder, String userName, String password, String filePath, String localDir) throws Exception {
SMBClient client = new SMBClient(SmbConfig.createDefaultConfig());
Connection conn = client.connect(ip);
Session session = conn.authenticate(new AuthenticationContext(userName, password.toCharArray(), ip));
downLoadSMB2(session, shareFolder, filePath, localDir);
}
private static void downLoadSMB2(Session session, String shareFolder, String filePath, String localDir) throws Exception {
InputStream fis = null;
FileOutputStream os = null;
DiskShare diskShare = null;
try {
diskShare = (DiskShare) session.connectShare(shareFolder);
if (!diskShare.fileExists(filePath)) {
throw new FileNotFoundException(filePath);
}
if (!diskShare.isConnected())
diskShare = (DiskShare) session.connectShare(shareFolder);
com.hierynomus.smbj.share.File file = diskShare.openFile(filePath,
EnumSet.of(AccessMask.GENERIC_READ),
(Set) null,
SMB2ShareAccess.ALL,
SMB2CreateDisposition.FILE_OPEN,
(Set) null
);
fis = file.getInputStream();
FileUtil.initfloderPath(localDir);
String[] filePathList = filePath.split("\\/");
String localFilePath = localDir + "/" + filePathList;
os = new FileOutputStream(localFilePath);
byte[] b = new byte;
int length;
while ((length = fis.read(b)) > 0) {
os.write(b, 0, length);
}
} catch (IOException e) {
throw e;
} finally {
IOUtils.close(os);
IOUtils.close(fis);
if (diskShare != null && diskShare.isConnected()) diskShare.close();
}
}445端口被禁用解决办法
一般企业/政府项目为了系统安全会禁用445端口，而445端口禁用后文件共享功能无法使用，此时我们需要进行端口转发，即将客户端445端口转发到共享服务器端口A，共享服务器将本地端口A转发到445即可完成共享，具体操作步骤如下，192.168.1.164就是共享文件服务器的内网ip
查看服务器转发规则
netsh interface portproxy show all删除服务器转发规则
netsh interface portproxy reset共享文件服务器
[*]执行CMD代码
netsh interface portproxy add v4tov4 listenport=4455 listenaddress=192.168.1.164 connectport=445 connectaddress=127.0.0.1
netsh interface portproxy add v4tov4 listenport=4455 listenaddress=127.0.0.1 connectport=445 connectaddress=127.0.0.1客户端服务器
[*]关闭Server服务
[*]CMD执行代码
netsh interface portproxy add v4tov4 listenaddress=127.0.0.1 listenport=445 connectaddress=192.168.1.164 connectport=4455
[*]重启系统
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