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JAVA中实现FTP功能代码
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.SocketException;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPConnectionClosedException;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
public final class FtpTest {
public static final void main(String[] args) {
int base = 0;
boolean storeFile = false, binaryTransfer = false, error = false;
String server, username, password, remote, local;
FTPClient ftp;
server = "172.16.1.1";
username = "public";
password = "public";
remote = "ht/isic-0.05.tar";
local = "d:\\isic-0.05.tar";
ftp = new FTPClient();
ftp.addProtocolCommandListener(new PrintCommandListener(
new PrintWriter(System.out)));
//----------------新添加的----------------
FTPClient ftest = new FTPClient();
try {
ftest.connect(server);
ftest.login(username, password);
FTPFile[] files = ftest.listFiles();
System.out.println("输出ftp服务器上根目录下的文件或文件夹名字开始：\n");
for (int i = 0; i < files.length; i++) {
System.out.println(IsoToCh(files[i].getName()));
}
System.out.println("输出ftp服务器上根目录下的文件或文件夹名字结束。\n");
} catch (SocketException e1) {
// TODO 自动生成 catch 块
e1.printStackTrace();
} catch (IOException e1) {
// TODO 自动生成 catch 块
e1.printStackTrace();
}
//---------------------------------------------------
try {
int reply;
ftp.connect(server);
System.out.println("Connected to " + server + ".");
// 尝试连接后，需要检验返回代码以验证是否连接成功
reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect();
System.err.println("FTP server refused connection.");
System.exit(1);
}
} catch (IOException e) {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException f) {
// do nothing
}
}
System.err.println("Could not connect to server.");
e.printStackTrace();
System.exit(1);
}
__main: try {
if (!ftp.login(username, password)) {
ftp.logout();
error = true;
break __main;
}
System.out.println("Remote system is " + ftp.getSystemName());
if (binaryTransfer)
ftp.setFileType(FTP.BINARY_FILE_TYPE);
// 默认状态下使用passive mode因为大多都在防火墙后面
ftp.enterLocalPassiveMode();
if (storeFile) {
InputStream input;
input = new FileInputStream(local);
ftp.storeFile(remote, input);
input.close();
} else {
OutputStream output;
output = new FileOutputStream(local);
ftp.retrieveFile(remote, output);
output.close();
}
ftp.logout();
} catch (FTPConnectionClosedException e) {
error = true;
System.err.println("Server closed connection.");
e.printStackTrace();
} catch (IOExceptione) {
error = true;
e.printStackTrace();
} finally {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException f) {
// do nothing
}
}
}
System.exit(error ? 1 : 0);
} // end main
/**
* iso8859_1转换为gb2312编码
* @param param
* @return
*/
public static String IsoToCh(String param) {
String temp = new String(param);
//这里都需要new一下，否则websphere4.0不认。
try {
temp = new String(temp.getBytes("iso8859_1"), "gb2312");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return temp;
}
}
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