一、上传文件
原理就不介绍了,大家直接看代码吧
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/** * Description: 向FTP服务器上传文件 * @Version1.0 Jul 27, 2008 4:31:09 PM by 崔红保(cuihongbao@d-heaven.com)创建 * @param url FTP服务器hostname * @param port FTP服务器端口 * @param username FTP登录账号 * @param password FTP登录密码 * @param path FTP服务器保存目录 * @param filename 上传到FTP服务器上的文件名 * @param input 输入流 * @return 成功返回true,否则返回false */ publicstaticboolean uploadFile(String url,int port,String username, String password, String path, String filename, InputStream input) { boolean success = false ;
FTPClient ftp = new FTPClient();
try {
int reply; ftp.connect(url, port); //连接FTP服务器
//如果采用默认端口,可以使用ftp.connect(url)的方式直接连接FTP服务器 ftp.login(username, password); //登录
reply = ftp.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect(); return success;
} ftp.changeWorkingDirectory(path); ftp.storeFile(filename, input); input.close(); ftp.logout(); success = true ;
} catch (IOException e) {
e.printStackTrace(); } finally { if (ftp.isConnected()) {
try {
ftp.disconnect(); } catch (IOException ioe) {
} } } return success;
}<pre></pre> /** * Description: 向FTP服务器上传文件 * @Version1.0 Jul 27, 2008 4:31:09 PM by 崔红保(cuihongbao@d-heaven.com)创建 * @param url FTP服务器hostname * @param port FTP服务器端口 * @param username FTP登录账号 * @param password FTP登录密码 * @param path FTP服务器保存目录 * @param filename 上传到FTP服务器上的文件名 * @param input 输入流 * @return 成功返回true,否则返回false */ public static boolean uploadFile(String url,int port,String username, String password, String path, String filename, InputStream input) { boolean success = false ;
FTPClient ftp = new FTPClient();
try {
int reply; ftp.connect(url, port); //连接FTP服务器
//如果采用默认端口,可以使用ftp.connect(url)的方式直接连接FTP服务器 ftp.login(username, password); //登录
reply = ftp.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect(); return success;
} ftp.changeWorkingDirectory(path); ftp.storeFile(filename, input); input.close(); ftp.logout(); success = true ;
} catch (IOException e) {
e.printStackTrace(); } finally { if (ftp.isConnected()) {
try {
ftp.disconnect(); } catch (IOException ioe) {
} } } return success;
} |
1.将本地文件上传到FTP服务器上,代码如下:
@Test
publicvoid testUpLoadFromDisk(){
try
{
FileInputStream
in
=
new
FileInputStream(
new
File(
"D:/test.txt"
));
boolean flag = uploadFile(
"127.0.0.1"
, 21,
"test"
,
"test"
,
"D:/ftp"
,
"test.txt"
,
in
);
System.out.println(flag);
}
catch
(FileNotFoundException e) {
e.printStackTrace();
}
}<pre></pre>
@Test
public void testUpLoadFromDisk(){
try
{
FileInputStream
in
=
new
FileInputStream(
new
File(
"D:/test.txt"
));
boolean flag = uploadFile(
"127.0.0.1"
, 21,
"test"
,
"test"
,
"D:/ftp"
,
"test.txt"
,
in
);
System.out.println(flag);
}
catch
(FileNotFoundException e) {
e.printStackTrace();
}
}
2.在FTP服务器上生成一个文件,并将一个字符串写入到该文件中
@Test
publicvoid testUpLoadFromString(){
try
{
InputStream input =
new
ByteArrayInputStream(
"test ftp"
.getBytes(
"utf-8"
));
boolean flag = uploadFile(
"127.0.0.1"
, 21,
"test"
,
"test"
,
"D:/ftp"
,
"test.txt"
, input);
System.out.println(flag);
}
catch
(UnsupportedEncodingException e) {
e.printStackTrace();
}
}<pre></pre>
@Test
public void testUpLoadFromString(){
try
{
InputStream input =
new
ByteArrayInputStream(
"test ftp"
.getBytes(
"utf-8"
));
boolean flag = uploadFile(
"127.0.0.1"
, 21,
"test"
,
"test"
,
"D:/ftp"
,
"test.txt"
, input);
System.out.println(flag);
}
catch
(UnsupportedEncodingException e) {
e.printStackTrace();
}
}
二、下载文件
从FTP服务器下载文件的代码也很简单,参考如下:
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/** * Description: 从FTP服务器下载文件 * @Version. Jul , :: PM by 崔红保(cuihongbao@d-heaven.com)创建 * @param url FTP服务器hostname * @param port FTP服务器端口 * @param username FTP登录账号 * @param password FTP登录密码 * @param remotePath FTP服务器上的相对路径 * @param fileName 要下载的文件名 * @param localPath 下载后保存到本地的路径 * @return */ publicstaticboolean downFile(String url, int port,String username, String password, String remotePath,String fileName,String localPath) {
boolean success = false ;
FTPClient ftp = new FTPClient();
try {
int reply;
ftp.connect(url, port); //如果采用默认端口,可以使用ftp.connect(url)的方式直接连接FTP服务器 ftp.login(username, password); //登录
reply = ftp.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect(); return success;
} ftp.changeWorkingDirectory(remotePath); //转移到FTP服务器目录
FTPFile[] fs = ftp.listFiles(); for (FTPFile ff:fs){
if (ff.getName().equals(fileName)){
File localFile = new File(localPath+ "/" +ff.getName());
OutputStream is = new FileOutputStream(localFile);
ftp.retrieveFile(ff.getName(), is); is.close(); } } ftp.logout(); success = true ;
} catch (IOException e) {
e.printStackTrace(); } finally {
if (ftp.isConnected()) {
try {
ftp.disconnect(); } catch (IOException ioe) {
} } } return success;
}<pre></pre> |
转载于http://www.jb51.net/article/86367.htm