[英]Unable to connect to FTP using FTP4J
我正在編寫一個程序,該程序必須連接到FTP服務器才能下載某些文件。 為了做到這一點,我正在使用FTP4J庫,但是我遇到了一些麻煩。
到目前為止,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URL為ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2015/10/PXD002829
但是,如果我運行該程序,則會得到:
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)
任何幫助,將不勝感激。
另外,我沒有服務器的登錄名,它只是文件的公共存儲庫。 這會影響我的工作方式嗎?
您需要分割路徑並創建一個類似於以下內容的網址:
ftp.pride.ebi.ac.uk
為了回答您的評論,您需要執行以下操作:
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();
}
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