在这里,原理就不讲了,只提供可以运行的代码,以及改如何去在软件上使用它们。
服务器端:
1.需要Eclipse。(自行安装)
2.创建两个类(命名为socketserver以及receive,其中socketserver是为了发送信息的,receive为了接收信息,且是一个线程)
3.socketserver代码如下:
import java.io.IOException;
import
import
import
import
public class
public static void main(String[] args) throws
new ServerSocket(30003);//在端口9996开一个服务,监听客户端发来的请求,准备接收客户端发来的请求数据
Socket socket =server.accept();//只有当有客户端请求并连接时,才回返回一个Socket对象,这个对象就是带着客户端请求的那个Socket对象
out.println("server connected!");
//创建一个PrintWriter的实例对象out来完成服务端向客户端的输出数据的任务,
new PrintWriter(socket.getOutputStream(),true);
//单独开一个线程接收从客户端过来的请求,在Receive1类中完成数据的接收
new Thread(new
t.start();
/*一定要理解Socket是一个用于机器之间通信的类*/
//发送数据给客户端
new Scanner(System.in);//键盘输入服务端要发给客户端的数据
while(scanner.hasNextLine()){
String data=scanner.nextLine();
out.println(data);//将键盘输入的服务端要发给客户端的数据封装在PrintWriter类的对象中
out.println("Server:"+data);
}
}
}
4.receive代码:
import
import
import
public class Receive1 implements
private Socket socket;
public
this.socket=socket;//在服务端接收客户端发来的数据需要调用Receive1()这个方法,就会得到一个Socket对象,这个对象就是携带着客户端请求的socket
}
@Override
public void
try
new Scanner(socket.getInputStream());//获得客户端从键盘接收的输入流
null;
while(true){
str=scanner.nextLine();
out.println("Client:"+str);
}
catch
e.printStackTrace();
//接收数据
}
}
客户端:
1.需要android studio。
2.需要MainActivity以及一个类clintclass
3.MainActivity代码如下:
package com.example.wuweipeng.exp2;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private EditText etMain;
private Button btnMain;
private TextView tvMain;
private ClientThread mClientThread;
//在主线程中定义Handler传入子线程用于更新TextView
private Handler mHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etMain = (EditText) findViewById(R.id.et_main);
btnMain = (Button) findViewById(R.id.btn_main);
tvMain = (TextView) findViewById(R.id.tv_main);
tvMain.setTextColor(Color.WHITE);
tvMain.setMovementMethod(new ScrollingMovementMethod());
mHandler=new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 0) {
tvMain.append("\n"+"Server:"+ msg.obj.toString());
}
}
};
//点击button时,获取EditText中string并且调用子线程的Handler发送到服务器
btnMain.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
Message msg = new Message();
msg.what = 1;
msg.obj = etMain.getText().toString();
tvMain.append("\n"+"Client:"+ msg.obj.toString());
mClientThread.revHandler.sendMessage(msg);
etMain.setText("");
} catch (Exception e) {
e.printStackTrace();
}
}
});
mClientThread = new ClientThread(mHandler);
new Thread(mClientThread).start();
tvMain.append("\n"+"已加入群聊");
}
}
4.ClientThread代码:
package com.example.wuweipeng.exp2;
/**
* Created by wuweipeng on 2018/3/24.
*/
import android.graphics.Color;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
/**
* 项目名称:SocketTestTwo
* 创建人:Double2号
* 创建时间:2016.11.20 9:16
* 修改备注:
*/
public class ClientThread implements Runnable {
private Socket mSocket;
private BufferedReader mBufferedReader = null;
private OutputStream mOutputStream = null;
private Handler mHandler;
public Handler revHandler;
public ClientThread(Handler handler) {
mHandler = handler;
}
@Override
public void run() {
try {
mSocket = new Socket("117.25.242.9", 30003);
Log.d("MainActivity","connect success");
mBufferedReader = new BufferedReader(new InputStreamReader(mSocket.getInputStream()));
mOutputStream = mSocket.getOutputStream();
new Thread(){
@Override
public void run() {
super.run();
try {
String content = null;
while ((content = mBufferedReader.readLine()) != null) {
Log.d("MainActivity",content);
Message msg = new Message();
msg.what = 0;
msg.obj = content;
Log.d("MainActivity",msg.toString());
mHandler.sendMessage(msg);
}
}catch (IOException e){
e.printStackTrace();
}
}
}.start();
//由于子线程中没有默认初始化Looper,要在子线程中创建Handler,需要自己写
Looper.prepare();
revHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 1) {
try {
mOutputStream.write((msg.obj.toString() + "\r\n").getBytes("utf-8"));
} catch (IOException e) {
e.printStackTrace();
}
}
}
};
Looper.loop();
} catch (IOException e) {
e.printStackTrace();
Log.d("MainActivity","");
}
}
}
5.XML界面代码:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:id="@+id/tv_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:maxLines = "15"
android:scrollbars = "vertical"
android:background="@drawable/img_2"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="@id/tv_main"
android:orientation="horizontal">
<EditText
android:id="@+id/et_main"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<Button
android:id="@+id/btn_main"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="send"/>
</LinearLayout>
</RelativeLayout>
6.最后一步,在AndroidMainfest。xml中添加这句话:
<uses-permission android:name="android.permission.INTERNET"/>
以下为试验结果:
out.println(data);//将键盘输入的服务端要发给客户端的数据封装在PrintWriter类的对象中
Sys
}