java 怎么不重复上传文件到ftp
答案:2 悬赏:30 手机版
解决时间 2021-03-21 12:11
- 提问者网友：暮烟疏雨之际
- 2021-03-21 07:24
java 怎么不重复上传文件到ftp
最佳答案
- 五星知识达人网友：妄饮晩冬酒
- 2021-03-21 07:43
上传之前，判断一下服务器端是否已经存在 。。。。。。。。。
全部回答
- 1楼网友：酒安江南
- 2021-03-21 09:19
上传下载的代码
import java.io.bufferedreader;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.inputstreamreader;
import sun.net.telnetoutputstream;
import sun.net.telnetinputstream;
import sun.net.ftp.ftpclient;
public class download {
string localfilename;
string remotefilename;
ftpclient ftpclient;
// server：服务器名字
// user：用户名
// password：密码
// path：服务器上的路径
public void connectserver(string ip, int port,string user
, string password,string path) {
try {
ftpclient = new ftpclient();
ftpclient.openserver(ip,port);
ftpclient.login(user, password);
system.out.println("login success!");
if (path.length() != 0) ftpclient.cd(path);
ftpclient.binary();
} catch (ioexception ex) {
system.out.println("not login");
system.out.println(ex);
}
}
public void closeconnect() {
try {
ftpclient.closeserver();
system.out.println("disconnect success");
} catch (ioexception ex) {
system.out.println("not disconnect");
system.out.println(ex);
}
}
public void upload() {
this.localfilename = "d://test2//test.txt";
this.remotefilename = "test.txt";
try {
telnetoutputstream os = ftpclient.put(this.remotefilename);
java.io.file file_in = new java.io.file(this.localfilename);
fileinputstream is = new fileinputstream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
}
system.out.println("upload success");
is.close();
os.close();
} catch (ioexception ex) {
system.out.println("not upload");
system.out.println(ex);
}
}
public void download() {
try {
telnetinputstream is = ftpclient.get(this.remotefilename);
java.io.file file_in = new java.io.file(this.localfilename);
fileoutputstream os = new fileoutputstream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
// system.out.println((char)is.read());
// system.out.println(file_in);
os.write(bytes, 0, c);
}
system.out.println("download success");
os.close();
is.close();
} catch (ioexception ex) {
system.out.println("not download");
system.out.println(ex);
}
}
public void download(string remotepath,string remotefile,string localfile) {
try {
if (remotepath.length() != 0) ftpclient.cd(remotepath);
telnetinputstream is = ftpclient.get(remotefile);
java.io.file file_in = new java.io.file(localfile);
fileoutputstream os = new fileoutputstream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
// system.out.println((char)is.read());
// system.out.println(file_in);
os.write(bytes, 0, c);
}
system.out.println("download success");
os.close();
is.close();
} catch (ioexception ex) {
system.out.println("not download");
system.out.println(ex);
}
}
public void download(string remotefile,string localfile) {
try {
telnetinputstream is = ftpclient.get(remotefile);
java.io.file file_in = new java.io.file(localfile);
fileoutputstream os = new fileoutputstream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
// system.out.println((char)is.read());
// system.out.println(file_in);
os.write(bytes, 0, c);
}
system.out.println("download success");
os.close();
is.close();
} catch (ioexception ex) {
system.out.println("not download");
system.out.println(ex);
}
}
public static void main(string agrs[]) {
string filepath[] = { "/callcenter/index.jsp", "/callcenter/ip.txt",
"/callcenter/mainframe/image/processing_bar_2.gif",
"/callcenter/mainframe/image/logo_01.jpg" };
string localfilepath[] = { "c:\\ftp_test\\index.jsp",
"c:\\ftp_test\\ip.txt", "c:\\ftp_test\\processing_bar_2.gif",
"c:\\ftp_test\\logo_01.jpg" };
download fu = new download();
fu.connectserver("172.16.1.66",22, "web_test", "123456","/callcenter");
for(int i=0;i
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