99我啊！！大家快来帮忙啊！！！有点难哦！！！！

2009-04-14 06:05:05 186 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

系统服务可用性指标99.99%，99.95%，99.90% 本文系统分析了系统可用性等级及其实现要求。从99.9%到99.999%五个等级，详细说明了各等级对应的年停机时间（8.76小时至5.26分钟）及适用场景。重点指出：1)可用性每提升一个"9"，实现难度和成本呈指数级增长；2)99.99%（年停机52分钟）是核心生产系统的黄金标准；3)高可用设计必须与业务价值匹配，避免过度投入。文章还澄清了常见误区，并针对不同业务类型给出了选型建议，强调应从基础架构起步，通过自动化运维逐步提升可用性。阅读详情

问题：Refactoring following simple socket server to mutil thread server.

package test7;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class SimpleServer {
public static void main(String [] args){
ServerSocket s = null;
Socket s1;
String sendString = "Hello Net World";
OutputStream slout;
DataOutputStream dos;
try{
s = new ServerSocket(5432);
}catch(Exception ex){ }
while(true){
try {
s1 = s.accept();
slout = s1.getOutputStream();
dos = new DataOutputStream(slout);
dos.writeUTF(sendString);
s1.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

...全文

基于Python的高考志愿辅助填报系统在实际应用中，系统需要处理更复杂的数据，包括更多的高校和专业信息、更详细的录取规则、以及用户的历史选择等。系统需要提供用户友好的界面，让考生输入自己的信息和偏好，然后通过后端的模型计算出推荐的志愿列表。此外，系统还应该提供一些个性化的服务，如根据考生的输入动态调整推荐策略、保存用户的填报历史和偏好等。特征可能包括考生的分数、所在省份、文理科类别、专业偏好、高校的地理位置、排名、专业的就业前景等。3. **推荐逻辑**：根据用户的分数和专业偏好，结合历史录取数据，使用简单的算法来推荐可能录取的高校和专业。阅读详情

whs999whs

Java SE 62,621 成员 307,251 内容

+ 关注 + 加入社区

切换为时间正序

fzdxwhl2007 2009-04-14

打赏
举报

//客户端
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.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;

public class ChatClient extends JFrame {
boolean beConnected = false;
Socket s = null;
DataOutputStream dos = null;
DataInputStream dis = null;
JTextField serIPText = new JTextField(10);
JTextField nameText = new JTextField(5);
JTextArea jtArea = new JTextArea();
JTextField jtField = new JTextField(40);
JButton conJB = new JButton("连接");
DefaultComboBoxModel dcbm=null;

public static void main(String[] args) {
new ChatClient().newClient();
}

public void newClient() {
this.setTitle("简易聊天客户端1.0");
JPanel jp = new JPanel();
jp.add(serIPText);
jp.add(nameText);
conJB.addActionListener(new JBListener());
jp.add(conJB);
this.jtField.addActionListener(new TFListener());
this.jtArea.setEditable(false);
JScrollPane jsp = new JScrollPane(jtArea);
jsp
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
this.add(jp, BorderLayout.NORTH);
this.add(jsp);
JPanel jpSouth=new JPanel();
jpSouth.add(jtField);
dcbm=new DefaultComboBoxModel();
//dcbm.addElement("All");
JComboBox jb=new JComboBox(dcbm);
jpSouth.add(jb);
this.add(jpSouth, BorderLayout.SOUTH);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
this.setBounds(300, 100, 600, 480);
this.setResizable(false);
this.setVisible(true);
}

public void connect(String ip) {
if (nameText.getText().trim().equals("")) {
jtArea.append("请填入用户名" + "\n");
} else {
try {
s = new Socket(ip, 8788);
dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(nameText.getText().trim());
beConnected = true;
conJB.setEnabled(false);
// dos.close();
jtArea.append("连接成功" + s.getInetAddress() + ":" + s.getPort()
+ new Date()+"\n");
dis = new DataInputStream(s.getInputStream());
new Thread(new ReceiveMes()).start();
} catch (IOException e) {
jtArea.append("连接错误...请退出" + "\n");
disConnect();
}
}
}

public void disConnect() {
try {
if (dos != null)
dos.close();
if (dis != null)
dis.close();
if (s != null)
s.close();
s = null;
beConnected = false;
conJB.setEnabled(true);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void sendMes(String s) {
try {
if (beConnected) {
dos.writeUTF(s);
}
} catch (IOException e1) {
try {
dos.close();
beConnected = false;
} catch (IOException e2) {
e2.printStackTrace();
}
e1.printStackTrace();
}
}

class TFListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
String temp = jtField.getText();
sendMes(temp);
jtField.setText("");
}
}

class JBListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
connect(serIPText.getText().trim());
}

}

class ReceiveMes implements Runnable {

@Override
public void run() {
while (beConnected) {
try {
String temp = dis.readUTF();
jtArea.append(temp + "\n");
} catch (IOException e) {
disConnect();
}
}
}
}
}

fzdxwhl2007 2009-04-14

打赏
举报

给你一段聊天室代码，你看看

//服务端
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Observable;
import java.util.Observer;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;

public class ChatServer extends Observable implements Serializable {
JTextArea jtArea = new JTextArea();
JTextArea clientInfo = new JTextArea();
List<ConnectClient> clientList = new ArrayList<ConnectClient>();

public static void main(String[] args) {
new ChatServer().newServer();
}

public void addText(String s) {
// jtArea.append(s + "\n");
this.setChanged();
this.notifyObservers(s);
}

public void newServer() {
JFrame jf = new JFrame();
jf.setLayout(new GridLayout(1, 2));
jf.setTitle("简易聊天服务端1.0");
this.jtArea.setEditable(false);
this.clientInfo.setEditable(false);
JScrollPane jsp = new JScrollPane(jtArea);
jsp
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
JScrollPane jspInfo = new JScrollPane(clientInfo);
jspInfo
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
jf.add(jspInfo);
jf.add(jsp);
jf.setBounds(150, 100, 400, 500);
jf.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
jf.setVisible(true);
startSever();
}

public void startSever() {
ServerSocket server = null;
try {
server = new ServerSocket(8788);
jtArea.append("服务器启动成功....." + "\n");
new Thread(new updataClients()).start();
while (true) {
Socket s = server.accept();
ConnectClient cc = new ConnectClient(s);
clientList.add(cc);
addText(cc.getName() + ":" + new Date() + ":" + "连接到服务器");
jtArea.append(cc.getName() + ":" + s.getInetAddress() + ":"
+ s.getPort() + ":" + "连接到服务器" + ":" + new Date()
+ "\n");
this.addObserver(cc);
new Thread(cc).start();
}
} catch (BindException e) {
jtArea.append("端口被占用，请退出" + "\n");
} catch (IOException e) {
jtArea.append("服务器启动失败，请退出" + "\n");
e.printStackTrace();
}
}

class ConnectClient implements Runnable, Observer, Serializable {
private boolean beConneted = false;
private transient Socket s = null;
private transient DataInputStream dis = null;
private transient DataOutputStream dos = null;
private String name = null;

public String getName() {
return name;
}

public ConnectClient(Socket ss) {
this.s = ss;
this.name = name;
beConneted = true;
try {
dis = new DataInputStream(s.getInputStream());
dos = new DataOutputStream(s.getOutputStream());
name = dis.readUTF();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void sendMes(String s) {
try {
if (beConneted)
dos.writeUTF(s);
} catch (IOException e) {

}
}

@Override
public void run() {
try {
while (beConneted) {
String ss = dis.readUTF();
addText(name + ":" + ss + " " + new Date());
}
} catch (SocketException e) {
addText(name + ":" + "断开" + ":" + new Date());
jtArea.append(name + ":" + s.getInetAddress() + ":"
+ s.getPort() + ":" + "断开" + ":" + new Date() + "\n");
clientList.remove(this);
beConneted = false;
} catch (IOException e) {
} finally {
try {
if (dos != null)
dos.close();
if (dis != null)
dis.close();
if (s != null)
s.close();
beConneted = false;
clientList.remove(this);
deleteObserver(this);
} catch (IOException e1) {
e1.printStackTrace();
}
}
}

@Override
public void update(Observable o, Object arg) {
String temp = (String) arg;
// System.out.println(temp);
this.sendMes(temp);
}
}

class updataClients implements Runnable {
@Override
public void run() {
while (true) {
updataInfo();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}

public void updataInfo() {
ObjectOutputStream oos = null;
clientInfo.setText("");
String temp = null;
for (int i = 0; i < clientList.size(); i++) {
ConnectClient cc = clientList.get(i);
temp = cc.getName();
clientInfo.append(temp + "\n");
}
}

}
}

oracle补丁技术支持 2009-04-14

打赏
举报



			while (true) {

				BufferedReader readBuffer = new BufferedReader(

						new InputStreamReader(socket.getInputStream()));

				PrintStream writeStream = new PrintStream(socket

						.getOutputStream());

				System.out.println(readBuffer.readLine());

				writeStream.println("Hello Net World");

				writeStream.flush();//刚才少了这句子



			}

oracle补丁技术支持 2009-04-14

打赏
举报

BufferedReader和PrintStream 是按行读和写,这个应该知道吧

hkp2008 2009-04-14

打赏
举报





import java.io.BufferedWriter;

import java.io.DataOutputStream; 

import java.io.IOException; 

import java.io.OutputStream; 

import java.io.OutputStreamWriter;

import java.net.ServerSocket; 

import java.net.Socket; 



public class SimpleServer { 	

	public static void main(String [] args){ 

		ServerSocket s = null; 

		Socket s1; 

		String sendString = "Hello Net World"; 

		OutputStream slout; 

		DataOutputStream dos; 

		try{ 

			s = new ServerSocket(5432); 

		}catch(Exception ex){ } 

		try { 

			s1 = s.accept(); 

			slout = s1.getOutputStream(); 

			dos = new DataOutputStream(slout); 

			BufferedWriter out=new BufferedWriter(new OutputStreamWriter(dos));

			out.write(sendString);

			out.flush();

			out.close();

			s1.close(); 

		} catch (Exception e) { 

			e.printStackTrace(); 

		} 

	

	} 

}

应该用字符流处理的！

oracle补丁技术支持 2009-04-14

打赏
举报



import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.PrintStream;

import java.net.ServerSocket;

import java.net.Socket;



public class MutiServer implements Runnable {

	private Socket socket;



	public MutiServer(Socket socket) {

		this.socket = socket;



	}

	public void run() {

		try {



			// 建议将DataInputStream换成BufferedReader

			while (true) {

				BufferedReader readBuffer = new BufferedReader(

						new InputStreamReader(socket.getInputStream()));

				PrintStream writeStream = new PrintStream(socket

						.getOutputStream());

				System.out.println(readBuffer.readLine());

				writeStream.println("Hello Net World");



			}

		} catch (Exception e) {

			e.printStackTrace();

		} finally {

			try {

				socket.close();

			} catch (Exception ee) {

				ee.printStackTrace();

			}

		}

	}



	public static void main(String[] args) {

		ServerSocket s = null;

		Socket s1;

		try {

			s = new ServerSocket(5432);

		} catch (Exception ex) {

		}

		while (true) {

			try {

				s1 = s.accept();

				new Thread(new MutiServer(s1)).start();



			} catch (Exception e) {

				e.printStackTrace();

			}

		}

	}



}

Despereaux 2009-04-14

打赏
举报

网上很多java socket实例

99我啊！！大家快来帮忙啊！！！有点难哦！！！！

相关推荐