使用JAVA API从FTP服务器下载文件
import java.io.IOException;import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import sun.net.TelnetInputStream;
import sun.net.ftp.FtpClient;
public class FtpDownload extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String ftpServer = "ftp server ip address";
String username = "username";
String password = "password";
String filename = "filename";
String path = "/path";
FtpClient ftpClient = new FtpClient();
ftpClient.openServer(ftpServer);
ftpClient.login(username, password);
if (path.length() != 0)
ftpClient.cd(path);
ftpClient.binary();
TelnetInputStream is = ftpClient.get(filename);
resp.setContentType("application/x-msdownload");
resp.setHeader("Content-Disposition", (new StringBuilder(
"attachment;filename=")).append(
new String(filename.getBytes(), "ISO-8859-1")).toString());
ServletOutputStream out = resp.getOutputStream();
byte[] bytes = new byte;
int c;
while ((c = is.read(bytes)) != -1) {
out.write(bytes, 0, c);
}
is.close();
out.flush();
out.close();
ftpClient.closeServer();
}
}
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