Question

我正在编写一个程序，必须连接到FTP服务器才能下载某些文件。为了做到这一点，我正在使用FTP4J库，但是我遇到了一些麻烦。

到目前为止，我有：

    if ("Dataset FTP location".equals(link.text())) {

        String FTPURL = link.attr("href");

        FTPClient client = new FTPClient();

        try {
            client.connect(FTPURL);
        } catch (FTPIllegalReplyException e) {
            e.printStackTrace();
        } catch (FTPException e) {
            e.printStackTrace();
        }

FTP的网址为ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2015/10/PXD002829

但是如果我运行程序，我会得到：

Exception in thread "main" java.net.UnknownHostException: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2015/10/PXD002829
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
    at it.sauronsoftware.ftp4j.FTPConnector.tcpConnectForCommunicationChannel(FTPConnector.java:208)
    at it.sauronsoftware.ftp4j.connectors.DirectConnector.connectForCommunicationChannel(DirectConnector.java:39)
    at it.sauronsoftware.ftp4j.FTPClient.connect(FTPClient.java:1036)
    at it.sauronsoftware.ftp4j.FTPClient.connect(FTPClient.java:1003)
    at Main.main(Main.java:63)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

任何帮助将不胜感激。

此外，我没有登录服务器，它只是一个公共的文件存储库。这会影响我的工作方式吗？

Answer 1

您需要拆分路径并创建一个类似于以下内容的网址：

ftp.pride.ebi.ac.uk

在回答你的评论时，你需要做这样的事情：

    String ftpPath = "ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2015/10/PXD002829";
    URL url = new URL(ftpPath);
    String host = url.getHost();
    FTPClient client = new FTPClient();
    try {
        client.connect(host);
        client.login("anonymous", "anonymous");
        FTPFile[] list = client.list(url.getPath());
        for (FTPFile f : list) {
            // Instead of printing out the file download it. See
            // http://www.sauronsoftware.it/projects/ftp4j/manual.php#14
            System.out.println(f); 
        }
    } catch (FTPIllegalReplyException e) {
        e.printStackTrace();
    } catch (FTPException e) {
        e.printStackTrace();
    }

无法使用FTP4J连接到FTP

1 个答案: