java名將

❶ 求用java寫一個ftp伺服器客戶端程序。

import java.io.*;
import java.net.*;public class ftpServer extends Thread{ public static void main(String args[]){
String initDir;
initDir = "D:/Ftp";
ServerSocket server;
Socket socket;
String s;
String user;
String password;
user = "root";
password = "123456";
try{
System.out.println("MYFTP伺服器啟動....");
System.out.println("正在等待連接....");
//監聽21號埠
server = new ServerSocket(21);
socket = server.accept();
System.out.println("連接成功");
System.out.println("**********************************");
System.out.println("");

InputStream in =socket.getInputStream();
OutputStream out = socket.getOutputStream();

DataInputStream din = new DataInputStream(in);
DataOutputStream dout=new DataOutputStream(out);
System.out.println("請等待驗證客戶信息....");

while(true){
s = din.readUTF();
if(s.trim().equals("LOGIN "+user)){
s = "請輸入密碼:";
dout.writeUTF(s);
s = din.readUTF();
if(s.trim().equals(password)){
s = "連接成功。";
dout.writeUTF(s);
break;
}
else{s ="密碼錯誤，請重新輸入用戶名：";<br> dout.writeUTF(s);<br> <br> }
}
else{
s = "您輸入的命令不正確或此用戶不存在，請重新輸入：";
dout.writeUTF(s);
}
}
System.out.println("驗證客戶信息完畢...."); while(true){
System.out.println("");
System.out.println("");
s = din.readUTF();
if(s.trim().equals("DIR")){
String output = "";
File file = new File(initDir);
String[] dirStructure = new String[10];
dirStructure= file.list();
for(int i=0;i<dirStructure.length;i++){
output +=dirStructure[i]+"\n";
}
s=output;
dout.writeUTF(s);
}
else if(s.startsWith("GET")){
s = s.substring(3);
s = s.trim();
File file = new File(initDir);
String[] dirStructure = new String[10];
dirStructure= file.list();
String e= s;
int i=0;
s ="不存在";
while(true){
if(e.equals(dirStructure[i])){
s="存在";
dout.writeUTF(s);
RandomAccessFile outFile = new RandomAccessFile(initDir+"/"+e,"r");
byte byteBuffer[]= new byte[1024];
int amount;
while((amount = outFile.read(byteBuffer)) != -1){
dout.write(byteBuffer, 0, amount);break;
}break;

}
else if(i<dirStructure.length-1){
i++;
}
else{
dout.writeUTF(s);
break;
}
}
}
else if(s.startsWith("PUT")){
s = s.substring(3);
s = s.trim();
RandomAccessFile inFile = new RandomAccessFile(initDir+"/"+s,"rw");
byte byteBuffer[] = new byte[1024];
int amount;
while((amount =din.read(byteBuffer) )!= -1){
inFile.write(byteBuffer, 0, amount);break;
}
}
else if(s.trim().equals("BYE"))break;
else{
s = "您輸入的命令不正確或此用戶不存在，請重新輸入：";
dout.writeUTF(s);
}
}

din.close();
dout.close();
in.close();
out.close();
socket.close();
}
catch(Exception e){
System.out.println("MYFTP關閉!"+e);

}
}}

❷ junit單元測試方法名必須為test開頭嗎

這並非必須test開頭

當勾選了需要測試的方法後，JUnit會自動生成對應的測試方法，測試方法名將以test開頭，而這支持自定義，並非必須。