我在处理ftpclient遇到几个问题,想听听大家的意见
api:common-net FtpClient
data: 2000个jpg图片,300M1. java.net.SocketException: Connection reset by peer: socket write error
这个错误是由于什么原因造成的的? 我看log,这时候的connetion还是有的。2。 Dead lock
在测试大数据量的时候,但执行retrieve()或者store()方法的时候,程式会停在语句上不继续执行了,请问什么原因,或者要加入什么判断3。我的需求是处理大量数据,从ftpA copy ftpB. 所以在retrieve(file,outstream),store(file,inputstream), 我retrieve获得outputstream存ByteArrayOutputStream ,store的时候把ByteArrayOutputStream 写入ByteArrayInputStream ,这样做法有没有问题,导致上面说的dead lock. public boolean copyFile(FTPClient ftpTo, String fileNameFrom, String fileNameTo) throws Exception { ByteArrayOutputStream bos = new ByteArrayOutputStream();
ByteArrayInputStream is = null;
try {
if (ftpClient.retrieveFile(fileNameFrom, bos)) {
is = new ByteArrayInputStream(bos.toByteArray());
bos.flush();
if (ftpTo.storeFile(fileNameTo, is)) {
return true;
} else {
_logger.info("ltltlt 2 false ");
}
}else{
} } catch (Exception e) {
_logger.error(e);
throw e;
} finally {
try {
bos.close();
if (is!=null) {
is.close();
}
} catch (Exception e) {
_logger.error(e);
}
}
return false;
}非常感谢
api:common-net FtpClient
data: 2000个jpg图片,300M1. java.net.SocketException: Connection reset by peer: socket write error
这个错误是由于什么原因造成的的? 我看log,这时候的connetion还是有的。2。 Dead lock
在测试大数据量的时候,但执行retrieve()或者store()方法的时候,程式会停在语句上不继续执行了,请问什么原因,或者要加入什么判断3。我的需求是处理大量数据,从ftpA copy ftpB. 所以在retrieve(file,outstream),store(file,inputstream), 我retrieve获得outputstream存ByteArrayOutputStream ,store的时候把ByteArrayOutputStream 写入ByteArrayInputStream ,这样做法有没有问题,导致上面说的dead lock. public boolean copyFile(FTPClient ftpTo, String fileNameFrom, String fileNameTo) throws Exception { ByteArrayOutputStream bos = new ByteArrayOutputStream();
ByteArrayInputStream is = null;
try {
if (ftpClient.retrieveFile(fileNameFrom, bos)) {
is = new ByteArrayInputStream(bos.toByteArray());
bos.flush();
if (ftpTo.storeFile(fileNameTo, is)) {
return true;
} else {
_logger.info("ltltlt 2 false ");
}
}else{
} } catch (Exception e) {
_logger.error(e);
throw e;
} finally {
try {
bos.close();
if (is!=null) {
is.close();
}
} catch (Exception e) {
_logger.error(e);
}
}
return false;
}非常感谢
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;
}
}