Question

我已经在Tomcat Server（v8）中部署了 webApplication ，该服务器在Windows 2008 R2 PC上运行服务。在此 webApplication 中，用户使用表单上传文件（照片）。我想要将这些照片存储在网络中的NAS磁盘中（服务器和NAS磁盘都在同一网络中）。

我阅读并关注了相关的answer。我首先尝试将照片保存在服务器C:的本地磁盘中，并且可以正常工作！

public void saveFiles(List<Part> fileParts,String targetId) { 
        String pathRoot = "C:\\Share\\photos\\;
        String date = new SimpleDateFormat("yyyyMMddHHmmss").format(Calendar.getInstance().getTime());

        try {
            int counter = 1;
            for (Part filePart : fileParts) {

                String destPath = pathRoot + "\\" + targetId;    
                Boolean flag = new File(destPath).mkdirs();                   
                System.err.println("mkdirs flag = " + flag);

                File file = new File(destPath, targetId + " " + date + "-" + counter + ".jpg");

                try (InputStream input = filePart.getInputStream()) {
                    Files.copy(input, file.toPath());
                }

                counter++;
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

但是，如果我将位置路径更改为NAS磁盘

String pathRoot = "\\\\192.168.0.7\\Share\\photos\\";

然后出现以下错误：

java.nio.file.FileSystemException: \\192.168.0.7\Share\photos\machines\4 20180704110827-1.jpg: Logon failure: unknown user name or bad password.
    at sun.nio.fs.WindowsException.translateToIOException(Unknown Source)
    at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
    at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
    at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(Unknown Source)
    at java.nio.file.spi.FileSystemProvider.newOutputStream(Unknown Source)
    at java.nio.file.Files.newOutputStream(Unknown Source)
    at java.nio.file.Files.copy(Unknown Source)
    at com.yaylitizis.production.Actions.saveFiles(Actions.java:1797)
    at com.yaylitizis.production.Actions.processRequest(Actions.java:510)
    at com.yaylitizis.production.Actions.doPost(Actions.java:1893)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.yaylitizis.production.FilterUTF8.doFilter(FilterUTF8.java:27)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

为了避免出现上述错误，如何添加网络磁盘的凭据？

编辑1

我从Windows映射了网络磁盘，并且可以访问该文件夹。但是，该错误仍然存在。

Answer 1

您可以通过两种方式实现这一目标：

1）由于网络驱动器中的“登录”是由Windows完成的，因此请转到您的服务器（安装并运行了Tomcat的服务器）上，访问共享文件夹\\192.168.0.7\Share\photos，并在其要求提供凭据时将其放置并在Windows上选中复选框记住凭据进行保存。然后，您可以在控制面板上编辑管理网络密码或从中删除。在here中查找更多信息

2）您必须为Java使用外部库。有一个有用的答案here

希望有帮助

Answer 2

您可以使用Runtime.exec执行net use \\192.168.0.7\Share\photos your-password /user:your-domain\your-user-name /persistent:yes /savecred。在Web应用程序初始化期间只需要执行一次。

从Servlet创建目录并将文件保存在网络位置

2 个答案: