FTPClient 创建远程文件并向文件里写内容！！！
核心代码：
for (int i = 0; i < list.size(); i++) {
RemoteDirBean dirbean = (RemoteDirBean) list.get(i);
String dirs = dirbean.getFirstdir() + "/"
+ dirbean.getSeconddir() + "/" + dirbean.getThirddir();
/**
* 向远程服务器写文件
*/
if(ftpClient.changeWorkingDirectory(dirs)){
System.out.println(ftpClient.printWorkingDirectory());
OutputStreamWriter out = new OutputStreamWriter(ftpClient
.appendFileStream("java" + i + ".txt"));
BufferedWriter pw = new BufferedWriter(out);
pw.write(" this is a test ");
pw.flush();
pw.close();
}else{
logger.info("更改目录失败！");
}
}
写第一个文件时没问题，但是循环第二次的时候，就打出“更改目录失败”，ftpClient.changeWorkingDirectory(dirs)成false了，这是怎么回事？
[解决办法]
ftpClient.changeWorkingDirectory(dirs)的返回BOOLEAN是不是表示是否成功切换到dirs目录?
如果是的话,那dirs可能不正确.
[解决办法]
菜鸟来帮您看看哇 随便帮您顶顶 我没有用过的 我去查查看哇
随便学习额
[解决办法]
是不是当指向了当前的目录的时候 你再用 changeWorkingDirectory();的时候 他就成false了
我感觉如果LZ的其他代码写得对的话 应该只有这个问题哇
Change the current working directory of the FTP session.
Returns:
True if successfully completed, false if not.
要不LZ多帖点代码 然后一起看看额？
[解决办法]
package nc.ui.doc.doc_007;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import nc.itf.doc.DocDelegator;
import nc.vo.doc.doc_007.DirVO;
import nc.vo.pub.BusinessException;
import nc.vo.pub.SuperVO;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.commons.net.ftp.FTP;
public class FtpTool {
private FTPClient ftp;
private String romateDir = "";
private String userName = "";
private String password = "";
private String host = "";
private String port = "21";
public FtpTool(String url) throws IOException {
//String url="ftp://user:password@ip:port/ftptest/psd";
int len = url.indexOf("//");
String strTemp = url.substring(len + 2);
len = strTemp.indexOf(":");
userName = strTemp.substring(0, len);
strTemp = strTemp.substring(len + 1);
len = strTemp.indexOf("@");
password = strTemp.substring(0, len);
strTemp = strTemp.substring(len + 1);
host = "";
len = strTemp.indexOf(":");
if (len < 0)//没有设置端口
{
port = "21";
len = strTemp.indexOf("/");
if (len > -1) {
host = strTemp.substring(0, len);
strTemp = strTemp.substring(len + 1);
} else {
strTemp = "";
}
} else {
host = strTemp.substring(0, len);
strTemp = strTemp.substring(len + 1);
len = strTemp.indexOf("/");
if (len > -1) {
port = strTemp.substring(0, len);
strTemp = strTemp.substring(len + 1);
} else {
port = "21";
strTemp = "";
}
}
romateDir = strTemp;
ftp = new FTPClient();
ftp.connect(host, FormatStringToInt(port));
}
public FtpTool(String host, int port) throws IOException {
ftp = new FTPClient();
ftp.connect(host, port);
}
public String login(String username, String password) throws IOException {
this.ftp.login(username, password);
return this.ftp.getReplyString();
}
public String login() throws IOException {
this.ftp.login(userName, password);
System.out.println("ftp用户: " + userName);
System.out.println("ftp密码: " + password);
if (!romateDir.equals(""))
System.out.println("cd " + romateDir);
ftp.changeWorkingDirectory(romateDir);
return this.ftp.getReplyString();
}
public boolean upload(String pathname, String filename) throws IOException, BusinessException {
int reply;
int j;
String m_sfilename = null;
filename = CheckNullString(filename);
if (filename.equals(""))
return false;
reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect();
System.out.println("FTP server refused connection.");
System.exit(1);
}
FileInputStream is = null;
try {
File file_in;
if (pathname.endsWith(File.separator)) {
file_in = new File(pathname + filename);
} else {
file_in = new File(pathname + File.separator + filename);
}
if (file_in.length() == 0) {
System.out.println("上传文件为空!");
return false;
}
//产生随机数最大到99
j = (int)(Math.random()*100);
m_sfilename = String.valueOf(j) + ".pdf"; // 生成的文件名
is = new FileInputStream(file_in);
ftp.setFileType(FTP.BINARY_FILE_TYPE);
ftp.storeFile(m_sfilename, is);
ftp.logout();
} finally {
if (is != null) {
is.close();
}
}
System.out.println("上传文件成功!");
return true;
}
public boolean delete(String filename) throws IOException {
FileInputStream is = null;
boolean retValue = false;
try {
retValue = ftp.deleteFile(filename);
ftp.logout();
} finally {
if (is != null) {
is.close();
}
}
return retValue;
}
public void close() {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static int FormatStringToInt(String p_String) {
int intRe = 0;
if (p_String != null) {
if (!p_String.trim().equals("")) {
try {
intRe = Integer.parseInt(p_String);
} catch (Exception ex) {
}
}
}
return intRe;
}
public static String CheckNullString(String p_String) {
if (p_String == null)
return "";
else
return p_String;
}
public boolean downfile(String pathname, String filename) {
String outputFileName = null;
boolean retValue = false;
try {
FTPFile files[] = ftp.listFiles();
int reply = ftp.getReplyCode();
////////////////////////////////////////////////
if (!FTPReply.isPositiveCompletion(reply)) {
try {
throw new Exception("Unable to get list of files to dowload.");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/////////////////////////////////////////////////////
if (files.length == 0) {
System.out.println("No files are available for download.");
}else {
for (int i=0; i <files.length; i++) {
System.out.println("Downloading file "+files[i].getName()+"Size:"+files[i].getSize());
outputFileName = pathname + filename + ".pdf";
//return outputFileName;
File f = new File(outputFileName);
//////////////////////////////////////////////////////
retValue = ftp.retrieveFile(outputFileName, new FileOutputStream(f));
if (!retValue) {
try {
throw new Exception ("Downloading of remote file"+files[i].getName()+" failed. ftp.retrieveFile() returned false.");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
/////////////////////////////////////////////////////////////
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return retValue;
}
}