客户端：
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
public class Client {
public static final String IP = "localhost";//服务器地址
public static final int PORT = 8000;//服务器端口号
public static void main(String[] args) {
handler();
}
private static void handler(){
try {
//实例化一个Socket，并指定服务器地址和端口
Socket client = new Socket(IP， PORT);
//开启两个线程，一个负责读，一个负责写
new Thread(new ReadHandlerThread(client)).start();
new Thread(new WriteHandlerThread(client)).start();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/*
*处理读操作的线程
*/
class ReadHandlerThread implements Runnable{
private Socket client;
public ReadHandlerThread(Socket client) {
this.client = client;
}
@Override
public void run() {
DataInputStream dis = null;
try {
while(true){
//读取服务器端数据
dis = new DataInputStream(client.getInputStream());
String receive = dis.readUTF();
System.out.println("服务器端返回过来的是: " + receive);
}
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
if(dis != null){
dis.close();
}
if(client != null){
client = null;
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/*
* 处理写操作的线程
*/
class WriteHandlerThread implements Runnable{
private Socket client;
public WriteHandlerThread(Socket client) {
this.client = client;
}
@Override
public void run() {
DataOutputStream dos = null;
BufferedReader br = null;
try {
while(true){
//取得输出流
dos = new DataOutputStream(client.getOutputStream());
System.out.print("请输入: ");
//键盘录入
br = new BufferedReader(new InputStreamReader(System.in));
String send = br.readLine();
//发送数据
dos.writeUTF(send);
}
} catch (IOException e) {
e.printStackTrace();
}  finally{
try{
if(dos != null){
dos.close();
}
if(br != null){
br.close();
}
if(client != null){
client = null;
}
}catch(Exception e){
e.printStackTrace();
}
}
}
}