我正在编写一个java applet来模拟与ubuntu机器的ssh连接，我设置连接，执行命令，然后回复响应，一切看起来都很好。 但是，我在这里有一个小问题，我想实时接收服务器套接字响应，所以我可以在Applet上实时模拟，但似乎我在命令执行完成时收到响应。 例如，我有一个测试tcl文件，我让执行在每个语句之间睡5秒钟，我应该每5秒响应一次applet，而不是我最终得到所有的响应。 有什么想法吗？
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* ssh_applet.java
*
* Created on 9-Dec-2010, 11:10:06 AM
*/
/**
*
* @author xzhang
*/
//import javax.swing.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.InputStreamReader;
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
import javax.swing.*;
public class ssh_applet extends javax.swing.JApplet{
private String host_name = null;
private String user_name = null;
private String pass_word = null;
private Connection app_conn;
private Session app_session;
/** Initializes the applet ssh_applet */
public void init() {
try {
java.awt.EventQueue.invokeAndWait(new Runnable() {
public void run() {
initComponents();
}
});
} catch (Exception ex) {
ex.printStackTrace();
}
}
/** This method is called from within the init() method to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
ssh_input = new javax.swing.JPanel();
connect = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
hostname = new javax.swing.JTextField();
username = new javax.swing.JTextField();
password = new javax.swing.JPasswordField();
ssh_command = new javax.swing.JTextField();
ssh_output_pannel = new javax.swing.JPanel();
jScrollPane1 = new javax.swing.JScrollPane();
ssh_output = new javax.swing.JTextArea();
clear_text = new javax.swing.JButton();
connect.setText("Connect");
connect.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
connectActionPerformed(evt);
}
});
jLabel1.setText("Host Name");
jLabel2.setText("User Name");
jLabel3.setText("Password");
hostname.setText("10.4.0.135");
username.setText("xzhang");
password.setText("Samboapple0827!");
ssh_command.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
ssh_commandActionPerformed(evt);
}
});
javax.swing.GroupLayout ssh_inputLayout = new javax.swing.GroupLayout(ssh_input);
ssh_input.setLayout(ssh_inputLayout);
ssh_inputLayout.setHorizontalGroup(
ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(ssh_inputLayout.createSequentialGroup()
.addContainerGap()
.addGroup(ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addGroup(ssh_inputLayout.createSequentialGroup()
.addGroup(ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel2)
.addComponent(jLabel3))
.addGap(18, 18, 18)
.addGroup(ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(username, javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(password)
.addComponent(hostname, javax.swing.GroupLayout.PREFERRED_SIZE, 122, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGroup(ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(ssh_inputLayout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(connect))
.addGroup(ssh_inputLayout.createSequentialGroup()
.addGap(49, 49, 49)
.addComponent(ssh_command, javax.swing.GroupLayout.PREFERRED_SIZE, 300, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(60, Short.MAX_VALUE))
);
ssh_inputLayout.setVerticalGroup(
ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(ssh_inputLayout.createSequentialGroup()
.addGap(14, 14, 14)
.addGroup(ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(hostname, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(connect))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(username, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(ssh_inputLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(ssh_command, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(18, Short.MAX_VALUE))
);
ssh_output.setColumns(20);
ssh_output.setEditable(false);
ssh_output.setLineWrap(true);
ssh_output.setRows(5);
jScrollPane1.setViewportView(ssh_output);
clear_text.setText("Clear");
clear_text.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
clear_textActionPerformed(evt);
}
});
javax.swing.GroupLayout ssh_output_pannelLayout = new javax.swing.GroupLayout(ssh_output_pannel);
ssh_output_pannel.setLayout(ssh_output_pannelLayout);
ssh_output_pannelLayout.setHorizontalGroup(
ssh_output_pannelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(ssh_output_pannelLayout.createSequentialGroup()
.addContainerGap()
.addGroup(ssh_output_pannelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 591, Short.MAX_VALUE)
.addComponent(clear_text, javax.swing.GroupLayout.Alignment.TRAILING))
.addContainerGap())
);
ssh_output_pannelLayout.setVerticalGroup(
ssh_output_pannelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(ssh_output_pannelLayout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 371, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(clear_text)
.addContainerGap())
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(ssh_input, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(ssh_output_pannel, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(ssh_input, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(ssh_output_pannel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
}// </editor-fold>
private void connectActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
/*get host_name*/
host_name=hostname.getText();
user_name=username.getText();
pass_word=password.getText();
/* Create a connection instance */
app_conn=new Connection(host_name);
try
{
app_conn.connect();
/* Authenticate.
* If you get an IOException saying something like
* "Authentication method password not supported by the server at this stage."
* then please check the FAQ.
*/
boolean isAuthenticated = app_conn.authenticateWithPassword(user_name, pass_word);
if (isAuthenticated == false)
throw new IOException("Authentication failed.");
JOptionPane.showMessageDialog(null, "You are connected to host "+host_name, "Connection",
JOptionPane.INFORMATION_MESSAGE);
/* Create a session */
}
catch(IOException e)
{}
}
private void ssh_commandActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String command=ssh_command.getText();
try
{
app_session=app_conn.openSession();
app_session.execCommand( command );
InputStream stdout = new StreamGobbler( app_session.getStdout() );
BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
String line ;
while( (line= br.readLine()) != null )
{
ssh_output.append( line + "\n" );
//line = br.readLine();
}
// DEBUG: dump the exit code
System.out.println( "ExitCode: " + app_session.getExitStatus() );
// Close the session
app_session.close();
}
catch(Exception e)
{}
}
private void clear_textActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
ssh_output.setText("");
}
// Variables declaration - do not modify
private javax.swing.JButton clear_text;
private javax.swing.JButton connect;
private javax.swing.JTextField hostname;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JPasswordField password;
private javax.swing.JTextField ssh_command;
private javax.swing.JPanel ssh_input;
private javax.swing.JTextArea ssh_output;
private javax.swing.JPanel ssh_output_pannel;
private javax.swing.JTextField username;
// End of variables declaration
}
这是我的代码，我正在使用ganymed-ssh2库，无法获取冲洗的地方
答案 0 :(得分：1)
每当服务器从程序中获取一些输出时，它应该将其推出网络并刷新流。
答案 1 :(得分：0)
没有任何代码可以查看，很难提供帮助。但是，听起来缓冲区需要刷新。
答案 2 :(得分：0)
您可能需要刷新套接字上的输出。看看Java Flush Socket。
在您的代码中，您可以在输出上调用flush()以强制它读取数据。
答案 3 :(得分：0)
弄清楚readline将阻止来自服务器的所有输入，更改为读取字节，它的工作原理。现在唯一的事情是考虑用户一个线程将文本追加到textarea。谢谢你们。