1.業務場景：甲方系統會不定期將一批xls檔案存放到windows伺服器的共享資料夾下，這些檔案將作為本系統的資料來源，需要自動維護到本系統的資料庫中。

2.準備工作：

　　①確保windows伺服器的smb服務啟動，如果未啟動，在啟用或關閉windows功能中開啟

　　②確保存放的目錄已經作為共享資料夾

3.程式碼

        <dependency>
            <groupId>jcifs</groupId>
            <artifactId>jcifs</artifactId>
            <version>1.3.17</version>
        </dependency>
        <!-- https://
 
mvnrepository.com/artifact/commons-io/commons-io -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>

public static void main(String[] args) throws
 
 IOException {
    remoteFile(".docx");
    uploadFile("smb://192.168.1.96/myDownload/","C:\\Users\\USERNAME\\Desktop\\orders.txt");
}

public static SmbFile getShareedRoot() throws IOException {
    String remoteShareRoot = "smb://192.168.1.96/myDownload/";
    NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("smb://192.168.1.96/",
            
 
"USERNAME", "PASSWORD");
    SmbFile remoteFile = new SmbFile(remoteShareRoot,auth);
    remoteFile.connect(); //嘗試連線
    return remoteFile;
}

public static SmbFile getSpecified(String remote) throws IOException {
    NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("smb://192.168.1.96/",
            "USERNAME", "PASSWORD");
    SmbFile remoteFile = new SmbFile(remote,auth);
    remoteFile.connect(); //嘗試連線
    return remoteFile;
}

//檢視共享檔案列表
public static SmbFile[] listFiles (SmbFile shareRoot) throws SmbException {
    return shareRoot.listFiles();
}

public static void downloadFile (SmbFile file) throws IOException {
    String fileName = file.getName();
    String localFile = fileName.substring(fileName.lastIndexOf("\\") + 1);
    try(InputStream in = new BufferedInputStream(new SmbFileInputStream(file)); FileOutputStream out  = new FileOutputStream(new File(localFile));){
        byte[] buffer = new byte[4096];
        int len = 0; //讀取長度
        while ((len = in.read(buffer, 0, buffer.length)) != - 1) {
            out.write(buffer, 0, len);
        }
        out.flush(); //重新整理緩衝的輸出流
    }
}

public static void uploadFile (String shareFileRoot, String localFilePath) {
    try {
        File localFile = new File(localFilePath);
        String fileName = localFile.getName();
        SmbFile file = getSpecified(shareFileRoot);
        //當成file用
        if (!file.exists()){
            file.mkdirs();
        }
        //下面一行本來打算想新建File在指定目錄下並且指定檔名，後面發現第一個引數與File同方法引數意義不同
        SmbFile remoteFile = new SmbFile( file.getURL() + "/" + fileName);
        IOUtils.copy(new FileInputStream(localFile), new SmbFileOutputStream(remoteFile));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public static void remoteFile(String want) throws IOException {
    SmbFile shareRoot = getShareedRoot();
    SmbFile smbFile = Arrays.stream(listFiles(shareRoot)).filter(x -> x.getName().endsWith(want)).findAny().get();
    downloadFile(smbFile);
}