关键点在于使用:
private ObjectOutputStream writer; // 声明PrintWriter类对象
private ObjectInputStream reader; // 声明BufferedReader对象
ObjectOutputStream和ObjectInputStream这两个类
具体代码如下:
一共三个类
服务端:
package InternetCode.Socket.Exa509;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
public class ServerSocketFrame{
private ObjectOutputStream writer; // 声明PrintWriter类对象
private ObjectInputStream reader; // 声明BufferedReader对象
private ServerSocket server; // 声明ServerSocket对象
private Socket socket; // 声明Socket对象socket
private Scanner scanner;
public void getServer() {
try {
server = new ServerSocket(1978); // 实例化Socket对象
System.out.println("服务器套接字已经创建成功\n"); // 输出信息
while (true) {
// 如果套接字是连接状态
System.out.println("等待客户机的连接......\n"); // 输出信息
socket = server.accept(); // 实例化Socket对象
reader = new ObjectInputStream(socket.getInputStream()); // 实例化BufferedReader对象
writer = new ObjectOutputStream(socket.getOutputStream());
getClientInfo(); // 调用getClientInfo()方法
}
} catch (Exception e) {
e.printStackTrace(); // 输出异常信息
}
}
private void getClientInfo() {
try {
while (true) {
// 如果套接字是连接状态
Student student= (Student)reader.readObject();
if (student != null)
System.out.println("接收到客户机发送的信息:学生编号" +student.getId()+"学生姓名:"+student.getName()+ "\n"); // 获得客户端信息
}
} catch (Exception e) {
System.out.println("客户端已退出。\n"); // 输出异常信息
} finally {
try {
if (reader != null) {
reader.close();// 关闭流
}
if (socket != null) {
socket.close(); // 关闭套接字
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 向客户端发送消息
*/
private void sendInfoToClient(){
while(true){
scanner=new Scanner(System.in);
System.out.println("请输入要发送的消息:");
String id=scanner.nextLine();
String name=scanner.nextLine();
if(id.equals("quit")){
break;
}
try{
writer.writeObject(new Student(id,name));
}catch (Exception e){
e.printStackTrace();
}
}
}
public static void main(String[] args) {
// 主方法
ServerSocketFrame frame = new ServerSocketFrame(); // 创建本类对象
//此线程用于监听接收消息
new Thread(new Runnable() {
@Override
public void run() {
frame.getServer();
}
}).start();
//此线程用发送消息给客户端
new Thread(new Runnable() {
@Override
public void run() {
frame.sendInfoToClient();
}
}).start();
}
}
客户端:
package InternetCode.Socket.Exa509;
import java.io.*;
import java.net.Socket;
import java.util.Scanner;
public class ClientSocketFrame {
private ObjectOutputStream writer;
private ObjectInputStream reader;
private Socket socket;
private Scanner scanner;
private void connect() {
// 连接套接字方法
System.out.println("尝试连接......\n"); // 文本域中信息信息
try {
// 捕捉异常
socket = new Socket("127.0.0.1", 1978); // 实例化Socket对象
while (true) {
writer = new ObjectOutputStream(socket.getOutputStream());
reader = new ObjectInputStream(socket.getInputStream()); // 实例化BufferedReader对象
System.out.println("完成连接。\n"); // 文本域中提示信息
getServerInfo();
}
} catch (Exception e) {
e.printStackTrace(); // 输出异常信息
}
}
private void getServerInfo() {
try {
while (true) {
// 如果套接字是连接状态
if (reader != null) {
Student student=(Student) reader.readObject();
if (student != null)
System.out.println("接收到服务器发送的信息:学生编号" +student.getId() +"学生姓名:"+student.getName()+ "\n"); // 获得客户端信息
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (reader != null) {
reader.close();// 关闭流
}
if (socket != null) {
socket.close(); // 关闭套接字
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 向服务器发送消息方法
*/
private void sendInfoToServer(){
while(true){
scanner=new Scanner(System.in);
System.out.println("请输入要发送的消息:");
String id=scanner.nextLine();
String name=scanner.nextLine();
if(id.equals("quit")){
break;
}
try{
writer.writeObject(new Student(id,name));
}catch (Exception e){
e.printStackTrace();
}
}
}
public static void main(String[] args) {
// 主方法
ClientSocketFrame client = new ClientSocketFrame(); // 创建本例对象
//此线程用于监听接收消息
new Thread(new Runnable() {
@Override
public void run() {
client.connect(); // 调用连接方法
}
}).start();
//此线程用发送消息给服务器
new Thread(new Runnable() {
@Override
public void run() {
client.sendInfoToServer(); // 调用连接方法
}
}).start();
}
}
对象类:
package InternetCode.Socket.Exa509;
import java.io.Serializable;
public class Student implements Serializable {
//学生编号
private String id;
//学生姓名
private String name;
public Student(String id,String name){
this.id=id;
this.name=name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
运行效果如下: