JAVA 访问windows共享文件夹

一、使用技术

JCIFS框架对Windows共享文件夹进行读写，使用了SMB通信协议，它为局域网内不同的计算机之间提供文件和打印机等资源共享服务 。

二、共享文件夹设置

1. 测试共享文件夹机器windows版本为win10家庭版.首先在应用和功能列表里找到

   2.然后在windows功能中打开SMB功能
   
   
   最后把一个把电脑上任意一个文件夹设置成共享.设置到这里就完成了!

三、版本选择

最开始我是使用的最新版本的

<dependency>
            <groupId>org.samba.jcifs</groupId>
            <artifactId>jcifs</artifactId>
            <version>1.3.3</version>
 </dependency>

先贴上我的测试代码

package com.plover.system.util;

import jcifs.smb.NtlmPasswordAuthentication;
import jcifs.smb.SmbException;
import jcifs.smb.SmbFile;
import jcifs.smb.SmbFileInputStream;
import jcifs.smb.SmbFileOutputStream;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;

/**
 * @author : AllenJ
 * @since : 2021/5/31
 */
public class SmbUtil {

    private static final String USER_DOMAIN = "";  //域账号,没有可以不填
    private static final String USER_NAME = "test";  //账号
    private static final String USER_PWS = "123456";  //密码

    public static void main(String[] args) {
        String shareDir = "smb://192.168.4.19/x04shareTest/";
        getFileList(shareDir);
//        smdDownload(shareDir, "d://home/smb");
    }

    /**
     * @date 2020-03-19
     * 遍历指定目录下的文件
     * shareDirectory: smb://192.168.4.19/x804shareTest/
     */
    private static void getFileList(String shareDirectory) {
        // 域服务器验证
        NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication(null, USER_NAME, USER_PWS);
        SmbFile remoteFile = null;
        try {
            remoteFile = new SmbFile(shareDirectory, auth);
           
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        try {
            if (remoteFile.exists()) {
                SmbFile[] files = remoteFile.listFiles();
                for (SmbFile f : files) {
                    System.out.println(f.getName());
                }
            }
        } catch (SmbException e) {
            e.printStackTrace();
        }
    }

    /**
     * @Param shareUrl:smb://192.168.4.19/x804shareTest/abc.jpg
     * @Param localDirectory 本地目录，如d://home/smb
     */
    public static void smdDownload(String shareUrl, String localDirectory) {
        NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication(USER_DOMAIN, USER_NAME,
                USER_PWS);
        SmbFile remoteFile = null;
        try {
            remoteFile = new SmbFile(shareUrl, auth);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        try {
            if (!remoteFile.exists()) {
                System.out.print("共享文件不存在");
                return;
            }
        } catch (SmbException e) {
            e.printStackTrace();
        }
        // 有文件的时候再初始化输入输出流
        InputStream in = null;
        OutputStream out = null;
        try {
            String fileName = remoteFile.getName();
            File localFile = new File(localDirectory + File.separator + fileName);
            File fileParent = localFile.getParentFile();
            if (null != fileParent && !fileParent.exists()) {
                fileParent.mkdirs();
            }
            in = new BufferedInputStream(new SmbFileInputStream(remoteFile));
            out = new BufferedOutputStream(new FileOutputStream(localFile));
            byte[] buffer = new byte[1024];
            int byteRead;
            while ((byteRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, byteRead);
            }
            out.flush(); //刷新缓冲区输出流
        } catch (Exception e) {
            LoggerUtil.error("", e);
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * @Param shareDirectory 共享目录
     * @Param localFilePath 本地目录中的文件路径
     */
    public static void smbUpload(String shareDirectory, String localFilePath) {
        InputStream in = null;
        OutputStream out = null;
        try {
            File localFile = new File(localFilePath);
            String fileName = localFile.getName();
            SmbFile remoteFile = new SmbFile(shareDirectory + "/" + fileName);
            in = new BufferedInputStream(new FileInputStream(localFile));
            out = new BufferedOutputStream(new SmbFileOutputStream(remoteFile));
            byte[] buffer = new byte[1024];
            int byteRead;
            while ((byteRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, byteRead);
            }
            out.flush();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

运行main方法后报了如下错误

jcifs.smb.SmbException
jcifs.util.transport.TransportException
java.io.IOException: Invalid payload size: 405
	at jcifs.smb.SmbTransport.negotiate(SmbTransport.java:279)
	at jcifs.smb.SmbTransport.doConnect(SmbTransport.java:306)
	at jcifs.util.transport.Transport.run(Transport.java:240)
	at java.lang.Thread.run(Thread.java:748)

	at jcifs.util.transport.Transport.run(Transport.java:256)
	at java.lang.Thread.run(Thread.java:748)

	at jcifs.smb.SmbTransport.connect(SmbTransport.java:296)
	at jcifs.smb.SmbTree.treeConnect(SmbTree.java:141)
	at jcifs.smb.SmbFile.doConnect(SmbFile.java:858)
	at jcifs.smb.SmbFile.connect(SmbFile.java:901)
	at jcifs.smb.SmbFile.connect0(SmbFile.java:827)
	at jcifs.smb.SmbFile.exists(SmbFile.java:1360)
	at com.plover.system.util.SmbUtil.listFiles(SmbUtil.java:51)
	at com.plover.system.util.SmbUtil.main(SmbUtil.java:31)

在研究了官方文档搜索了无数论坛后,一直没有找到解决版本,后来在国外某个小论坛有个网友回复降版本可以解决这个问题,于是我把版本替换成1.2.19版本

<dependency>
       <groupId>org.samba.jcifs</groupId>
       <artifactId>jcifs</artifactId>
       <version>1.2.19</version>
</dependency>

完美解决!!