2019.10.07

1.窗口聊天

代码：
服务器：
package MyFrame;

import java.io.*;
import java.net.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class MyServer implements ActionListener {
    ServerSocket ss;
    Socket s;
    int port;
    String str;
    BufferedReader br;
    PrintStream p;
    JFrame f;
    JLabel l1,l2,l3;
    JButton b1,b2,b3;
    JTextArea ta;
    JTextField t1,t2,t3;
    public MyServer() {
        f=new JFrame("服务器端");
        l1=new JLabel("ip地址：");
        l2=new JLabel("端口号：");
        l3=new JLabel("服务器对话框：");
        b1=new JButton("确定");
        b2=new JButton("关闭");
        b3=new JButton("发送");
        t1=new JTextField(20);
        t2=new JTextField(20);
        t3=new JTextField(20);
        ta=new JTextArea();
        ta.setLineWrap(true);
        ta.setEditable(false);
        f.setSize(500, 600);
        f.setVisible(true);
        f.setLayout(null);
        f.add(l1);
        f.add(t1);
        f.add(l2);
        f.add(t2);
        f.add(l3);
        f.add(b1);
        f.add(b2);
        f.add(b3);
        f.add(ta);
        f.add(t3);
        l1.setBounds(50, 15, 50, 25);
        t1.setBounds(100, 15, 120, 25);
        l2.setBounds(250, 15, 50, 25);
        t2.setBounds(300, 15, 120, 25);
        b1.setBounds(160, 50, 60, 30);
        b2.setBounds(250, 50, 60, 30);
        ta.setBounds(0, 90, 500, 420);
        l3.setBounds(10, 520, 100, 30);
        t3.setBounds(100, 520, 300, 30);
        b3.setBounds(410, 520, 60, 30);
        b1.addActionListener(this);
        b2.addActionListener(this);
        b3.addActionListener(this);
f.setBounds(100, 100, 500, 600);
    }
    public static void main(String[] args) throws IOException {
        new MyServer();
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        Thread t1=new Thread(new Runnable() {
            public void run() {
                try {
                    ss=new ServerSocket(port);
                    s=ss.accept();
                    ta.append("客户端连接成功！\n");
                    br=new BufferedReader(new InputStreamReader(s.getInputStream()));
                    p=new PrintStream(s.getOutputStream());
                    p.println("已成功连接服务器！");
                    while(true) {
                            str=br.readLine();
                            ta.append("客户端："+str+"\n");
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }});
        String str1=e.getActionCommand();
        if(str1.equals("确定")) {
                String str2=t2.getText();
                port=Integer.parseInt(str2);
                ta.append("服务器启动完成!等待连接中......\n");
                t1.start();
        }
        else if(str1.equals("关闭")) {
            System.exit(0);
        }
        else if(str1.equals("发送")){
            String str3=t3.getText();
            ta.append(str3+"\n");
            p.println(str3);
            t3.setText("");
        }
    }
}
客户端：
package MyFrame;

import java.io.*;
import java.net.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class MyClient implements ActionListener {
    Socket s;
    int port;
    String str,ip1;
    BufferedReader br;
    PrintStream p;
    JFrame f;
    JLabel l1,l2,l3;
    JButton b1,b2,b3;
    JTextArea ta;
    JTextField t1,t2,t3;
    public MyClient() {
        f=new JFrame("客户端");
        l1=new JLabel("ip地址：");
        l2=new JLabel("端口号：");
        l3=new JLabel("客户端对话框：");
        b1=new JButton("确定");
        b2=new JButton("关闭");
        b3=new JButton("发送");
        t1=new JTextField(20);
        t2=new JTextField(20);
        t3=new JTextField(20);
        ta=new JTextArea();
        ta.setLineWrap(true);
        ta.setEditable(false);
        f.setSize(500, 600);
        f.setVisible(true);
        f.setLayout(null);
        f.add(l1);
        f.add(t1);
        f.add(l2);
        f.add(t2);
        f.add(l3);
        f.add(b1);
        f.add(b2);
        f.add(b3);
        f.add(ta);
        f.add(t3);
        l1.setBounds(50, 15, 50, 25);
        t1.setBounds(100, 15, 120, 25);
        l2.setBounds(250, 15, 50, 25);
        t2.setBounds(300, 15, 120, 25);
        b1.setBounds(160, 50, 60, 30);
        b2.setBounds(250, 50, 60, 30);
        ta.setBounds(0, 90, 500, 420);
        l3.setBounds(10, 520, 100, 30);
        t3.setBounds(100, 520, 300, 30);
        b3.setBounds(410, 520, 60, 30);
        b1.addActionListener(this);
        b2.addActionListener(this);
        b3.addActionListener(this);
f.setBounds(700, 100, 500, 600);
    }
    public static void main(String[] args) throws IOException {
            new MyClient();
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        Thread t=new Thread(new Runnable() {
            public void run() {
                try { 
                    s=new Socket(ip1,port);
                    br=new BufferedReader(new InputStreamReader(s.getInputStream()));
                    p=new PrintStream(s.getOutputStream());
                    while(true){
                            str=br.readLine();
                            ta.append("服务器："+str+"\n");
                        }
                }
                catch (UnknownHostException e1) {
                    ta.append("IP地址或端口号输入错误!");
                    e1.printStackTrace();
                } 
                catch (ConnectException e2) {
                    ta.append("找不到对应服务器!端口号输入错误!");
                    e2.printStackTrace();
                }
                catch(SocketException e3) {
                    ta.append("连接错误！");
                    e3.printStackTrace();
                }
                catch (IOException e) {
                        e.printStackTrace();
                    }    
            }
        });
        
        String str1=e.getActionCommand();
        if(str1.equals("确定")) {
            ip1=t1.getText();
            String str2=t2.getText();
            port=Integer.parseInt(str2);
            t.start();
            ta.append("客户端启动成功！正在连接中......\n");
        }
        else if(str1.equals("关闭")) {
            System.exit(0);
        }
        else if(str1.equals("发送")) {
            String str5=t3.getText();
            ta.append(str5+"\n");
            p.println(str5);
            t3.setText("");
        }
    }
}

运行截图：

2.文件传送

代码：
服务器：
package MyFileTCP;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;

import javax.swing.*;
import java.net.*;
public class MyFileServer implements ActionListener{
    String path;
    ServerSocket ss;
    Socket s;
    JFrame f;
    JPanel p;
    JTextArea ta;
    JLabel l;
    JButton b1,b2;
    JTextField t;
    public MyFileServer() {
        f=new JFrame("服务器端");
        p=new JPanel();
        ta=new JTextArea();
        l=new JLabel("文件路径：");
        b1=new JButton("发送");
        b1.addActionListener(this);
        b2=new JButton("关闭");
        b2.addActionListener(this);
        t=new JTextField(14);
        f.setVisible(true);
        f.setSize(360, 260);
        f.setLayout(new BorderLayout());
        f.add(ta,BorderLayout.CENTER);
        f.add(p,BorderLayout.SOUTH);
        p.add(l);
        p.add(t);
        p.add(b1);
        p.add(b2);
        ta.setEditable(false);
        try {
            ss=new ServerSocket(6666);
            ta.append("服务器已启动，等待客户端连接中...\n");
            s=ss.accept();
            ta.append("客户端连接完成，可传送文件\n");
            s.close();
            ss.close();
        } 
        catch(FileNotFoundException e1) {
            ta.append("系统找不到指定的路径!\n");
            e1.printStackTrace();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) throws IOException {
        new MyFileServer();
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        Thread t1=new Thread(new Runnable() {
            public void run() {
                try {
                    ss=new ServerSocket(6666);
                    s=ss.accept();
                } 
                catch(FileNotFoundException e1) {
                    ta.append("系统找不到指定的路径!\n");
                    e1.printStackTrace();
                }
                catch (IOException e) {
                    e.printStackTrace();
                }
                    try {
                        File file=new File(path);
                        OutputStream out=s.getOutputStream();
                        String filename=file.getName();
                        out.write(filename.getBytes());
                        out.flush();
                        Thread.sleep(5000);
                        BufferedInputStream in=new BufferedInputStream(new FileInputStream(file));
                        byte []buff=new byte[1024];
                        int len;
                        while((len=in.read(buff))!=-1){
                            out.write(buff, 0, len);
                        }
                        ta.append("传送完成！可继续！（文件保存于D盘）\n");
                        out.close();
                        in.close();
                        s.close();
                        ss.close();
                    }
                    catch (InterruptedException e) {
                        ta.append("文件传输中断！\n");
                        e.printStackTrace();
                    }
                    catch (IOException e) {
                        e.printStackTrace();
                    }
            }   
        });
        String str=e.getActionCommand();
        if(str.equals("发送")) {
            path=t.getText();
            ta.append("正在传送文件："+path+"\n");
            t.setText("");
            t1.start();
        }
        else if(str.equals("关闭")) {
            System.exit(0);
        }
    }
}

客户端：
package MyFileTCP;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;

import javax.swing.*;
import java.net.*;
public class MyFileClient implements ActionListener{
    String path;
    String filename;
    Socket s;
    JFrame f;
    JPanel p;
    JTextArea ta;
    JButton b1,b2;
    public MyFileClient(){
        f=new JFrame("客户端");
        p=new JPanel();
        ta=new JTextArea();
        b1=new JButton("接收");
        b1.addActionListener(this);
        b2=new JButton("关闭");
        b2.addActionListener(this);
        f.setVisible(true);
        f.setSize(360, 260);
        f.setLayout(new BorderLayout());
        f.add(ta,BorderLayout.CENTER);
        f.add(p,BorderLayout.SOUTH);
        p.add(b1);
        p.add(b2);
        ta.setEditable(false);
        try {
            s=new Socket("localhost",6666);
            ta.append("服务器连接成功，可接收文件！\n");
            s.close();
        } catch (UnknownHostException e) {
            ta.append("IP地址或端口号输入错误!\n");
            e.printStackTrace();
        }
        catch (ConnectException e2) {
            ta.append("找不到对应服务器!端口号输入错误!\n");
            e2.printStackTrace();
        }
        catch(SocketException e3) {
            ta.append("连接错误！\n");
            e3.printStackTrace();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) throws UnknownHostException, IOException {
        new MyFileClient();
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        Thread t1=new Thread(new Runnable() {
            public void run() {
                try {
                    s=new Socket("localhost",6666);
                } catch (UnknownHostException e) {
                    ta.append("IP地址或端口号输入错误!\n");
                    e.printStackTrace();
                }
                catch (ConnectException e2) {
                    ta.append("找不到对应服务器!端口号输入错误!\n");
                    e2.printStackTrace();
                }
                catch(SocketException e3) {
                    ta.append("连接错误！\n");
                    e3.printStackTrace();
                }
                catch (IOException e) {
                    e.printStackTrace();
                }
                
                    try {
                        InputStream in=s.getInputStream();
                        byte []filenamebyte=new byte[1024];
                        int filenamelen;
                        filenamelen=in.read(filenamebyte);
                        filename=new String(filenamebyte,0,filenamelen);
                        path="d:/"+"copy--"+filename;
                        ta.append("正在接收文件："+"copy--"+filename+"\n");
                        File file=new File(path);
                        BufferedOutputStream out=new BufferedOutputStream(new FileOutputStream(file));
                        byte[] buff=new byte[1024];
                        int len;
                        while((len=in.read(buff))!=-1) {
                            out.write(buff, 0, len);
                        }
                        ta.append("接收完成！可继续！（文件保存于D盘）\n");
                        out.close();
                        in.close();
                        s.close();
                    }catch (IOException e) {
                        e.printStackTrace();
                    }
            }
        });
        String str=e.getActionCommand();
        if(str.equals("接收")) {
            t1.start();;
        }
        else if(str.equals("关闭")) {
            System.exit(0);
        }
    }
}

截图：