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  • 大小: 2KB
    文件類型: .rar
    金幣: 2
    下載: 0 次
    發(fā)布日期: 2021-05-06
  • 語言: Java
  • 標(biāo)簽: FTP客戶端??下載??上傳??

資源簡介

解析FTP協(xié)議命令,實現(xiàn)FTP端的下載和上傳文件功能

資源截圖

代碼片段和文件信息



import?java.io.File;
import?java.io.FileInputStream;
import?java.io.FileOutputStream;
import?java.io.IOException;
import?java.io.InputStream;
import?java.io.OutputStream;
import?java.net.Socket;
import?java.net.UnknownHostException;
import?java.util.Scanner;

public?class?FtpClient?{
Socket?socket;
InputStream?ins;
OutputStream?outs;
public?FtpClient(Socket?socket)?throws?IOException?{
this.socket?=?socket;
this.ins=socket.getInputStream();
this.outs=socket.getOutputStream();
}

public?void?login(String?userString?passer)?throws?Exception{
byte[]?temp0=new?byte[512];
//得到FTP響應(yīng)
int?size=ins.read(temp0);
String?s=new?String(temp00size);
//輸出響應(yīng)
System.out.println(s);
String?name=“USER?“+user+“\r\n“;
//寫入登錄信息s
outs.write(name.getBytes());
outs.flush();
//服務(wù)器返回信息
size=ins.read(temp0);
//輸出:
s=new?String(temp00size);
System.out.println(s);
//密碼
String?pass=“PASS?“+passer+“\r\n“;
//寫入密碼
outs.write(pass.getBytes());
//得到返回信息
size=ins.read(temp0);
s=new?String(temp00size);
System.out.println(s);
Scanner?sc2=new?Scanner(System.in);
System.out.println(“請選擇是上傳還是下載(輸入1為下載,2為上傳):“);
int?Choose=sc2.nextInt();
if(Choose==1){
this.download();
}else?if(Choose==2){
this.upload();
}else{
System.out.println(“輸入錯誤!!good?bye!“);

}

}
public?Socket?getPort()?throws?Exception{
????????//寫入FTP模式取得端口,并鏈接
byte[]?temp=new?byte[1024];
int?size=0;
String?s;
outs.write(“PASV?\r\n“.getBytes());
????????//服務(wù)器返回信息
size=ins.read(temp);
s=new?String(temp0size);
System.out.println(s);
String[]?ports=s.split(““);
//取得數(shù)據(jù)傳輸端口
String?lastport=ports[5].substring(0?(ports[5].length()-3));
int?port=Integer.valueOf(ports[4])*256+Integer.valueOf(lastport);
//鏈接服務(wù)器數(shù)據(jù)傳輸端口獲得數(shù)據(jù)傳輸?shù)妮斎胼敵隽?br/> Socket?so=new?Socket(“172.18.24.3“port);
return?so;
}
public?void?download()?throws?Exception?{
????????//寫入FTP模式
byte[]?temp=new?byte[1024];
int?size=0;
Socket?so=getPort();
InputStream?input=so.getInputStream();
OutputStream?output=so.getOutputStream();
//控制臺輸入下載命令
Scanner?sc3=new?Scanner(System.in);
System.out.println(“請輸入下載的文件名(用戶根目錄E盤):“);
String?name=sc3.nextLine();
//服務(wù)器上的文件
// File?srcfile=new?File(“F:/“+name);
//下載到的地方
File?dstfile=new?File(“D:/“+name);
// FileInputStream?fin=new?FileInputStream(srcfile);
FileOutputStream?fout=new?FileOutputStream(dstfile);

String?downName=“RETR?“+name+“\r\n“;
outs.write(downName.getBytes());
outs.flush();
????????//服務(wù)器返回信息
size=ins.read(temp);
//輸出:
String?s2=new?String(temp0size);
System.out.println(s2);

while((size=input.read(temp))!=-1){
fout.write(temp?0?size);
fout.flush();
}

System.out.println(“文件下載成功!默認(rèn)在D盤.“);
//寫入退出命令
outs.write(“quit“.getBytes());
//讀出返回信息
size=ins.read(temp);
//打印
socket.close();
String?quit=new?String(temp0size);

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4804??2010-04-22?19:12??FTPclinet\FtpClient.java

?????目錄??????????0??2010-04-22?19:12??FTPclinet

-----------?---------??----------?-----??----

?????????????????4804????????????????????2


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