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1回顶部 Java实现ftp功能源代码： import sun.net.ftp.*; 2回顶部 BtnConn = new Button("连接"); BtnClose = new Button("断开"); BtnClose.enable(false); TxtUID = new TextField("",15); TxtPWD = new TextField("",15); TxtPWD.setEchoCharacter(’*’); TxtHost = new TextField("",20); Label LblUID = new Label("User ID:"); Label LblPWD = new Label("PWD:"); Label LblHost = new Label("Host:"); lsArea = new TextArea(30,80); lsArea.setEditable(false); GBC.gridwidth= GridBagConstraints.REMAINDER; GBC.fill = GridBagConstraints.HORIZONTAL; ((GridBagLayout)getLayout()).setConstraints(LblPrompt,GBC); add(LblPrompt); GBC.gridwidth=1; ((GridBagLayout)getLayout()).setConstraints(LblHost,GBC); add(LblHost); GBC.gridwidth=GridBagConstraints.REMAINDER; ((GridBagLayout)getLayout()).setConstraints(TxtHost,GBC); add(TxtHost); GBC.gridwidth=1; ((GridBagLayout)getLayout()).setConstraints(LblUID,GBC); add(LblUID); GBC.gridwidth=1; ((GridBagLayout)getLayout()).setConstraints(TxtUID,GBC); add(TxtUID); 3回顶部 GBC.gridwidth=1; ((GridBagLayout)getLayout()).setConstraints(LblPWD,GBC); add(LblPWD); GBC.gridwidth=1; ((GridBagLayout)getLayout()).setConstraints(TxtPWD,GBC); add(TxtPWD); GBC.gridwidth=1; GBC.weightx=2; ((GridBagLayout)getLayout()).setConstraints(BtnConn,GBC); add(BtnConn); GBC.gridwidth=GridBagConstraints.REMAINDER; ((GridBagLayout)getLayout()).setConstraints(BtnClose,GBC); add(BtnClose); GBC.gridwidth=GridBagConstraints.REMAINDER; GBC.fill = GridBagConstraints.HORIZONTAL; ((GridBagLayout)getLayout()).setConstraints(lsArea,GBC); add(lsArea); } public boolean connect(String hostname, String uid,String pwd) { this.hostname = hostname; LblPrompt.setText("正在连接，请等待....."); try{ aftp =new FtpClient(hostname); aftp.login(uid,pwd); aftp.binary(); showFileContents(); } catch(FtpLoginException e){ a="无权限与主机:"+hostname+"连接!"; LblPrompt.setText(a); return false; } catch (IOException e){ a="连接主机:"+hostname+"失败!"; LblPrompt.setText(a); return false; } catch(SecurityException e) { a="无权限与主机:"+hostname+"连接!"; LblPrompt.setText(a); return false; } LblPrompt.setText("连接主机:"+hostname+"成功!"); return true; } 4回顶部 public void stop() { try { aftp.closeServer(); } catch(IOException e) { } } public void paint(Graphics g){ } public boolean action(Event evt,Object obj) { if (evt.target == BtnConn) { LblPrompt.setText("正在连接，请等待....."); if (connect(TxtHost.getText(),TxtUID.getText(),TxtPWD.getText())) { BtnConn.setEnabled(false); BtnClose.setEnabled(true); } return true; } if (evt.target == BtnClose) { stop(); BtnConn.enable(true); BtnClose.enable(false); LblPrompt.setText("与主机"+hostname+"连接已断开!"); return true; } return super.action(evt,obj); } public boolean sendFile(String filepathname){ boolean result=true; if (aftp != null) { LblPrompt.setText("正在粘贴文件,请耐心等待...."); 5回顶部 String contentperline; try{ a="粘贴成功!"; String fg =new String("\\"); int index = filepathname.lastIndexOf(fg); String filename = filepathname.substring(index+1); File localFile ; localFile = new File(filepathname) ; RandomAccessFile sendFile = new RandomAccessFile(filepathname,"r"); // sendFile.seek(0); outs = aftp.put(filename); outputs = new DataOutputStream(outs); while (sendFile.getFilePointer() < sendFile.length() ) { ch = sendFile.read(); outputs.write(ch); } outs.close(); sendFile.close(); } catch(IOException e){ a = "粘贴失败!"; result = false ; } LblPrompt.setText(a); showFileContents(); } else{ result = false; } return result; } 6回顶部 public void showFileContents() { StringBuffer buf = new StringBuffer(); lsArea.setText(""); try { ins= aftp.list(); while ((ch=ins.read())>=0){ buf.append((char)ch); } lsArea.appendText(buf.toString()); ins.close(); } catch(IOException e) { } } public static void main(String args[]){ Frame f = new Frame("FTP Client"); f.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e){ System.exit(0); } }); FtpApplet ftp = new FtpApplet(); ftp.init(); ftp.start(); f.add(ftp); f.pack(); f.setVisible(true); } } |
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正在阅读：Java实现ftp功能Java实现ftp功能
2004-04-05 14:41
出处：Javajia
责任编辑：sdq
