概述
专注于为中小企业提供网站建设、网站制作服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业平原免费做网站提供优质的服务。我们立足成都，凝聚了一批互联网行业人才，有力地推动了千余家企业的稳健成长，帮助中小企业通过网站建设实现规模扩充和转变。
具体框架使用jframe，文本框组件：JTextField；密码框组件：JPasswordField；标签组件：JLabel；复选框组件：JCheckBox；单选框组件：JRadioButton；按钮组件JButton。
登录界面：
代码实例
import javax.swing.*;
import java.awt.*; //导入必要的包
public class denglu extends JFrame{
JTextField jTextField ;//定义文本框组件
JPasswordField jPasswordField;//定义密码框组件
JLabel jLabel1,jLabel2;
JPanel jp1,jp2,jp3;
JButton jb1,jb2; //创建按钮
public denglu(){
jTextField = new JTextField(12);
jPasswordField = new JPasswordField(13);
jLabel1 = new JLabel("用户名");
jLabel2 = new JLabel("密码");
jb1 = new JButton("确认");
jb2 = new JButton("取消");
jp1 = new JPanel();
jp2 = new JPanel();
jp3 = new JPanel();
//设置布局
this.setLayout(new GridLayout(3,1));
jp1.add(jLabel1);
jp1.add(jTextField);//第一块面板添加用户名和文本框
jp2.add(jLabel2);
jp2.add(jPasswordField);//第二块面板添加密码和密码输入框
jp3.add(jb1);
jp3.add(jb2); //第三块面板添加确认和取消
// jp3.setLayout(new FlowLayout()); //因为JPanel默认布局方式为FlowLayout，所以可以注销这段代码.
this.add(jp1);
this.add(jp2);
this.add(jp3); //将三块面板添加到登陆框上面
//设置显示
this.setSize(300, 200);
//this.pack();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
this.setTitle("登陆");
}
public static void main(String[] args){
new denglu();
}
}
拓展内容
java swing包
Swing 是一个为Java设计的GUI工具包。
Swing是JAVA基础类的一部分。
Swing包括了图形用户界面（GUI）器件如：文本框，按钮，分隔窗格和表。
Swing提供许多比AWT更好的屏幕显示元素。它们用纯Java写成，所以同Java本身一样可以跨平台运行，这一点不像AWT。它们是JFC的一部分。它们支持可更换的面板和主题（各种操作系统默认的特有主题），然而不是真的使用原生平台提供的设备，而是仅仅在表面上模仿它们。这意味着你可以在任意平台上使用JAVA支持的任意面板。轻量级组件的缺点则是执行速度较慢，优点就是可以在所有平台上采用统一的行为。
概念解析：
JFrame – java的GUI程序的基本思路是以JFrame为基础，它是屏幕上window的对象，能够最大化、最小化、关闭。
JPanel – Java图形用户界面(GUI)工具包swing中的面板容器类，包含在javax.swing 包中，可以进行嵌套，功能是对窗体中具有相同逻辑功能的组件进行组合，是一种轻量级容器，可以加入到JFrame窗体中。。
JLabel – JLabel 对象可以显示文本、图像或同时显示二者。可以通过设置垂直和水平对齐方式，指定标签显示区中标签内容在何处对齐。默认情况下，标签在其显示区内垂直居中对齐。默认情况下，只显示文本的标签是开始边对齐；而只显示图像的标签则水平居中对齐。
JTextField –一个轻量级组件，它允许编辑单行文本。
JPasswordField – 允许我们输入了一行字像输入框，但隐藏星号(*) 或点创建密码(密码)
JButton – JButton 类的实例。用于创建按钮类似实例中的 "Login"。
给你一个聊天室的，这个是客户端之间的通信，服务器负责接收和转发，你所要的服务器与客户端对发，只要给服务器写个界面显示和输入就行，所有代码如下：
你测试的时候应该把所有代码放在同一个工程下，因为客户端可服务器共用同一个POJO，里面有些包的错误，删除掉就行了
服务器代码，即服务器入口程序：
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
import java.util.HashSet;
public class ChatRoomServer {
private ServerSocket ss;
private HashSetSocket allSockets;
private UserDao dao;
public ChatRoomServer(){
try {
ss=new ServerSocket(9999);
allSockets=new HashSetSocket();
dao=new UserDaoForTextFile(new File("d:/stu/user.txt"));
} catch (IOException e) {
e.printStackTrace();
}
}
public void startService() throws IOException{
while(true){
Socket s=ss.accept();
allSockets.add(s);
new ChatRoomServerThread(s).start();
}
}
class ChatRoomServerThread extends Thread{
private Socket s;
public ChatRoomServerThread(Socket s){
this.s=s;
}
public void run(){
//1,得到Socket的输入流，并包装。
//2，循环从输入流中读取一行数据。
//3，每读到一行数据，判断该行是否是退出命令？
//4，如果是退出命令，则将当前socket从集合中删除，关闭当前socket，并跳出循环
//5，如果不是退出命令，则将该消model.getCurrentUser().getName()息转发给所有在线的客户端。
// 循环遍历allSockets集合，得到每一个socket的输出流，向流中写出该消息。
BufferedReader br=null;
String str = null;
try {
br = new BufferedReader(new InputStreamReader(s
.getInputStream()));
while((str=br.readLine())!=null ){
if(str.indexOf("%EXIT%")==0){
allSockets.remove(s);
//向其他客户端发送XXX退出的消息
sendMessageToAllClient(str.split(":")[1]+"离开聊天室！");
s.close();
break;
}else if(str.indexOf("%LOGIN%")==0){
String userName=str.split(":")[1];
String password=str.split(":")[2];
User user=dao.getUser(userName, password);
ObjectOutputStream oos=new ObjectOutputStream(s.getOutputStream());
oos.writeObject(user);
oos.flush();
if(user!=null){
sendMessageToAllClient(user.getName()+"进入聊天室！");
}
str = null;
}
if(str!=null){
sendMessageToAllClient(str);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void sendMessageToAllClient(String message)throws IOException{
Date date=new Date();
System.out.println(s.getInetAddress()+":"+message+"\t["+date+"]");
for(Socket temps:allSockets){
PrintWriter pw=new PrintWriter(temps.getOutputStream());
pw.println(message+"\t["+date+"]");
pw.flush();
}
}
}
public static void main(String[] args) {
try {
new ChatRoomServer().startService();
} catch (IOException e) {
e.printStackTrace();
}
}
}
客户端代码：
总共4个：
1：入口程序：
public class ChatRoomClient {
private ClientModel model;
public ChatRoomClient(){
// String hostName = JOptionPane.showInputDialog(null,
// "请输入服务器主机名：");
// String portName = JOptionPane
// .showInputDialog(null, "请输入端口号：");
//固定服务端IP和端口
model=new ClientModel("127.0.0.1",Integer.parseInt("9999"));
model.createSocket();
new LoginFrame(model).showMe();
}
public static void main(String[] args) {
new ChatRoomClient();
}
}
2：登陆后显示界面：
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class ClientMainFrame extends JFrame{
private JTextArea area;
private JTextField field;
private JLabel label;
private JButton button;
private ClientModel model;
public ClientMainFrame(){
super("聊天室客户端v1.0");
area=new JTextArea(20,40);
field=new JTextField(25);
button=new JButton("发送");
label=new JLabel();
JScrollPane jsp=new JScrollPane(area);
this.add(jsp,BorderLayout.CENTER);
JPanel panel=new JPanel();
panel.add(label);
panel.add(field);
panel.add(button);
this.add(panel,BorderLayout.SOUTH);
addEventHandler();
}
public ClientMainFrame(ClientModel model){
this();
this.model=model;
label.setText(model.getCurrentUser().getName());
}
public void addEventHandler(){
ActionListener lis=new SendEventListener();
button.addActionListener(lis);
field.addActionListener(lis);
this.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent arg0) {
int op=JOptionPane.showConfirmDialog(null,"确认退出聊天室吗？","确认退出",JOptionPane.YES_NO_OPTION);
if(op==JOptionPane.YES_OPTION){
PrintWriter pw = model.getOutputStream();
if(model.getCurrentUser().getName()!=null){
pw.println("%EXIT%:"+model.getCurrentUser().getName());
pw.flush();
}
try {
Thread.sleep(200);
} catch (Exception e) {
}
System.exit(0);
}
}
});
}
public void showMe(){
this.pack();
this.setVisible(true);
this.setLocation(300,300);
this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
new ReadMessageThread().start();
}
class SendEventListener implements ActionListener{
public void actionPerformed(ActionEvent e) {
String str=field.getText().trim();
if(str.equals("")){
JOptionPane.showMessageDialog(null, "不能发送空消息！");
return;
}
PrintWriter pw = model.getOutputStream();
pw.println(model.getCurrentUser().getName()+":"+str);
pw.flush();
field.setText("");
}
}
class ReadMessageThread extends Thread{
public void run(){
while(true){
try {
BufferedReader br = model.getInputStream();
String str=br.readLine();
area.append(str+"\n");
} catch (IOException e) {
}
}
}
}
}
3：登陆界面：
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.PrintWriter;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class LoginFrame extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JLabel lab1 = null;
private JLabel lab2 = null;
private JLabel lab3 = null;
private JTextField userNameField = null;
private JPasswordField passwordField = null;
private JButton loginButton = null;
private JButton registerButton = null;
private JButton cancelButton = null;
private ClientModel model = null;
/**
* This method initializes userNameField
*
* @return javax.swing.JTextField
*/
private JTextField getUserNameField() {
if (userNameField == null) {
userNameField = new JTextField();
userNameField.setSize(new Dimension(171, 33));
userNameField.setFont(new Font("Dialog", Font.PLAIN, 18));
userNameField.setLocation(new Point(140, 70));
}
return userNameField;
}
/**
* This method initializes passwordField
*
* @return javax.swing.JPasswordField
*/
private JPasswordField getPasswordField() {
if (passwordField == null) {
passwordField = new JPasswordField();
passwordField.setSize(new Dimension(173, 30));
passwordField.setFont(new Font("Dialog", Font.PLAIN, 18));
passwordField.setLocation(new Point(140, 110));
}
return passwordField;
}
/**
* This method initializes loginButton
*
* @return javax.swing.JButton
*/
private JButton getLoginButton() {
if (loginButton == null) {
loginButton = new JButton();
loginButton.setLocation(new Point(25, 180));
loginButton.setText("登录");
loginButton.setSize(new Dimension(75, 30));
}
return loginButton;
}
/**
* This method initializes cancelButton
*
* @return javax.swing.JButton
*/
private JButton getCancelButton() {
if (cancelButton == null) {
cancelButton = new JButton();
cancelButton.setLocation(new Point(270, 180));
cancelButton.setText("取消");
cancelButton.setSize(new Dimension(75, 30));
}
return cancelButton;
}
/**
* 显示界面的方法，在该方法中调用addEventHandler()方法给组件添加事件监听器
*
*/
public void showMe(){
this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
this.setVisible(true);
this.setLocation(300,200);
addEventHandler();
}
/**
* 该方法用于给组件添加事件监听
*
*/
public void addEventHandler(){
ActionListener loginListener=new LoginEventListener();
loginButton.addActionListener(loginListener);
passwordField.addActionListener(loginListener);
cancelButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
try {
model.getSocket().close();
} catch (IOException e1) {
e1.printStackTrace();
}
System.exit(0);
}
});
this.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent arg0) {
try {
model.getSocket().close();
} catch (IOException e1) {
e1.printStackTrace();
}
System.exit(0);
}
});
}
/**
* 该内部类用来监听登录事件
* @author Administrator
*
*/
class LoginEventListener implements ActionListener{
public void actionPerformed(ActionEvent e) {
//?????登录的代码
//1,判断用户名和密码是否为空
//2，从clientmodel得到输出流，PrintWriter
//3，发送登录请求给服务器
//pw.println("%LOGIN%:userName:password");
//4,从socket得到对象输入流，从流中读取一个对象。
//5，如果读到的对象为null，则显示登录失败的消息。
//6，如果读到的对象不为空，则转成User对象，并且将
// clientModel的currentUser对象设置为该对象。
//7，并销毁当前窗口，打开主界面窗口。
String userName = userNameField.getText();
char[] c = passwordField.getPassword();
String password = String.valueOf(c);
if(userName == null || userName.equals("")){
JOptionPane.showMessageDialog(null,"用户名不能为空");
return;
}
if(password == null || password.equals("")){
JOptionPane.showMessageDialog(null,"密码名不能为空");
return;
}
PrintWriter pw = model.getOutputStream();
pw.println("%LOGIN%:"+userName+":"+password);
pw.flush();
try {
InputStream is = model.getSocket().getInputStream();
System.out.println("is"+is.getClass());
ObjectInputStream ois = new ObjectInputStream(is);
Object obj = ois.readObject();
if(obj != null){
User user = (User)obj;
if(user != null){
model.setCurrentUser(user);
LoginFrame.this.dispose();
new ClientMainFrame(model).showMe();
}
}
else{
JOptionPane.showMessageDialog(null,"用户名或密码错误，请重新输入");
userNameField.setText("");
passwordField.setText("");
return;
}
} catch (Exception e1) {
e1.printStackTrace();
}
}
}
public static void main(String[] args) {
new LoginFrame().showMe();
}
/**
* This is the default constructor
*/
public LoginFrame(ClientModel model) {
this();
this.model=model;
}
public LoginFrame(){
super();
initialize();
}
public ClientModel getModel() {
return model;
}
public void setModel(ClientModel model) {
this.model = model;
}
/**
* This method initializes this
*
* @return void
*/
private void initialize() {
this.setSize(362, 267);
this.setContentPane(getJContentPane());
this.setTitle("达内聊天室--用户登录");
}
/**
* This method initializes jContentPane
*
* @return javax.swing.JPanel
*/
private JPanel getJContentPane() {
if (jContentPane == null) {
lab3 = new JLabel();
lab3.setText("密 码：");
lab3.setSize(new Dimension(80, 30));
lab3.setFont(new Font("Dialog", Font.BOLD, 18));
lab3.setLocation(new Point(50, 110));
lab2 = new JLabel();
lab2.setText("用户名：");
lab2.setSize(new Dimension(80, 30));
lab2.setToolTipText("");
lab2.setFont(new Font("Dialog", Font.BOLD, 18));
lab2.setLocation(new Point(50, 70));
lab1 = new JLabel();
lab1.setBounds(new Rectangle(54, 12, 245, 43));
lab1.setFont(new Font("Dialog", Font.BOLD, 24));
lab1.setForeground(new Color(0, 0, 204));
lab1.setText("聊天室--用户登录");
jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.add(lab1, null);
jContentPane.add(lab2, null);
jContentPane.add(lab3, null);
jContentPane.add(getUserNameField(), null);
jContentPane.add(getPasswordField(), null);
jContentPane.add(getLoginButton(), null);
jContentPane.add(getCancelButton(), null);
}
return jContentPane;
}
}
4：客户端管理socket类
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
/**
* 该类定义客户端的全局参数，如：Socket，当前用户,流对象等
*
*/
public class ClientModel {
private Socket socket;
private User currentUser;
private BufferedReader br;
private PrintWriter pw;
private String hostName;
private int port;
public Socket getSocket() {
return socket;
}
public ClientModel(String hostName, int port) {
super();
this.hostName = hostName;
this.port = port;
}
public User getCurrentUser() {
return currentUser;
}
public void setCurrentUser(User currentUser) {
this.currentUser = currentUser;
}
public synchronized Socket createSocket(){
if(socket==null){
try {
socket=new Socket(hostName,port);
}catch (IOException e) {
e.printStackTrace();
return null;
}
}
return socket;
}
public synchronized BufferedReader getInputStream(){
if (br==null) {
try {
br = new BufferedReader(new InputStreamReader(socket
.getInputStream()));
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
return br;
}
public synchronized PrintWriter getOutputStream(){
if (pw==null) {
try {
pw = new PrintWriter(socket.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
return pw;
}
public synchronized void closeSocket(){
if(socket!=null){
try {
br.close();
pw.close();
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
socket=null;
br=null;
pw=null;
}
}
这里是工具和POJO类：
User类：
import java.io.Serializable;
public class User implements Serializable {
private static final long serialVersionUID = 1986L;
private int id;
private String name;
private String password;
private String email;
public User(){}
public User( String name, String password, String email) {
super();
this.name = name;
this.password = password;
this.email = email;
}
public User( String name, String password) {
super();
this.name = name;
this.password = password;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String toString(){
return id+":"+name+":"+password+":"+email;
}
}
DAO，用于从本地读取配置文件
接口：
public interface UserDao {
public boolean addUser(User user);
public User getUser(String userName,String password);
}
实现类：
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
public class UserDaoForTextFile implements UserDao{
private File userFile;
public UserDaoForTextFile(){
}
public UserDaoForTextFile(File file){
this.userFile = file;
if(!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public synchronized boolean addUser(User user) {
FileInputStream fis = null;
BufferedReader br = null;
int lastId = 0;
try{
fis = new FileInputStream(userFile);
br = new BufferedReader(new InputStreamReader(fis));
String str = null;
String lastLine = null;
while((str=br.readLine()) != null){
//得到最后一行值
lastLine = str;
if(str.split(":")[1].equals(user.getName())){
return false;
}
}
if(lastLine != null)
lastId = Integer.parseInt(lastLine.split(":")[0]);
}catch(Exception e){
e.printStackTrace();
}finally{
if(br!=null)try{br.close();}catch(IOException e){}
if(fis!=null)try{fis.close();}catch(IOException e){}
}
FileOutputStream fos = null;
PrintWriter pw = null;
try{
fos = new FileOutputStream(userFile,true);
pw = new PrintWriter(fos);
user.setId(lastId+1);
pw.println(user);
pw.flush();
return true;
}catch(Exception e){
e.printStackTrace();
}finally{
if(pw!=null)try{pw.close();}catch(Exception e){}
if(fos!=null)try{fos.close();}catch(IOException e){}
}
return false;
}
public synchronized User getUser(String userName, String password) {
FileInputStream fis = null;
BufferedReader br = null;
String str = null;
User user = null;
try{
fis = new FileInputStream(userFile);
br = new BufferedReader(new InputStreamReader(fis));
while((str = br.readLine()) != null){
String[] s = str.split(":");
if(userName.equals(s[1]) password.equals(s[2])){
user = new User();
user.setId(Integer.parseInt(s[0]));
user.setName(s[1]);
user.setPassword(s[2]);
user.setEmail(s[3]);
}
}
}catch(IOException e){
e.printStackTrace();
}finally{
if(br!=null)try{br.close();}catch(IOException e){}
if(fis!=null)try{fis.close();}catch(IOException e){}
}
return user;
}
}
配置文件格式为：
id流水号:用户名:密码:邮箱
1:yawin:034437:yawin@126.com
2:zhoujg:034437:zhou@126.com
客户端
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.net.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
/**
*
* @author Administrator
*/
public class Main extends JFrame{
JPanel jp;
JButton jb;
javax.swing.JTextField jt1;
JTextField jt2;
JTextField jt3;
JLabel jl1;
JLabel jl2;
public Main()
{
this.setBounds(150, 50, 300, 100);
jp= new JPanel(new GridLayout(3, 2));
jb=new JButton("登陆");
jt1=new JTextField();
jt2=new JTextField();
jt3=new JTextField();
jt3.setEditable(false);
jl1=new JLabel("用户名");
jl2=new JLabel("密码");
this.getContentPane().add(jp);
jp.add(jl1);
jp.add(jt1);
jp.add(jl2);
jp.add(jt2);
jp.add(jt3);
jp.add(jb);
this.setVisible(true);
jb.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String sentence;
String modifiedSentence = null;
//BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
Socket clientSocket = null;
try {
clientSocket = new Socket("127.0.0.1", 6789);
} catch (UnknownHostException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
//System.out.println("connection ok");
DataOutputStream outToServer = null;
try {
outToServer = new DataOutputStream(clientSocket.getOutputStream());
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
BufferedReader inFromServer = null;
try {
inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
sentence=jt1.getText()+" "+jt2.getText();
try {
//System.out.println(sentence);
outToServer.writeBytes(sentence + '\n');
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
try {
modifiedSentence = inFromServer.readLine();
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
//System.out.println("FROM SERVER:"+modifiedSentence);
jt3.setText(modifiedSentence);
try {
clientSocket.close();
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) throws Exception
{
Main m=new Main();
}
}
服务器端
import java.io.*;
import java.net.*;
public class Main {
public static void main(String[] args) throws Exception {
String clientSentence;
String capitalizedSentence;
ServerSocket welcomeSocket=new ServerSocket(6789);
while(true){
Socket connectionSocket=welcomeSocket.accept();
BufferedReader inFromClient=new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
DataOutputStream outToClient=new DataOutputStream(connectionSocket.getOutputStream());
clientSentence=inFromClient.readLine();
//capitalizedSentence=clientSentence.toUpperCase()+'\r'+'\n';
//outToClient.writeBytes(capitalizedSentence);
if(clientSentence.equalsIgnoreCase("admin 1234"))
outToClient.writeBytes("ok"+'\n');
else
outToClient.writeBytes("error"+'\n');
}
}
}
用Socket类去连接
String ip = "192.168.0.57";
int port=7000;
InputStream in;
OutputStream out;
Socket sock = null;
try {
sock = new Socket(ip,port);
sock.setSoTimeout(60*1000);//设置超时
this.in = sock.getInputStream();
this.out = sock.getOutputStream();
} catch (Exception e) {
throw new Exception("与终端连接失败!");
}
