android之socket编程实例

转载

generallizhong 2021-07-07 10:51:26

文章标签 Android开发 文章分类 Android 移动开发

[+]

实例一
1. 客户端
2. 服务端
实例二
1. 客户端
2. 服务端

注意点：注册访问的网络权限；android中UI线程不能有访问网络的操作，否则会报

- - - 客户端
  [java] view plain copy print ?
  1. package com.android.xiong.simplesocket;
  3. import java.io.BufferedReader;
  4. import java.io.IOException;
  5. import java.io.InputStreamReader;
  6. import java.io.OutputStream;
  7. import java.net.InetSocketAddress;
  8. import java.net.Socket;
  9. import java.net.SocketTimeoutException;
  11. import android.app.Activity;
  12. import android.os.Bundle;
  13. import android.os.Handler;
  14. import android.os.Message;
  15. import android.view.Menu;
  16. import android.view.View;
  17. import android.view.View.OnClickListener;
  18. import android.widget.Button;
  19. import android.widget.EditText;
  20. import android.widget.TextView;
  22. public class MainActivity extends Activity {
  23. Socket socket = null;
  24. String buffer = "";
  25. TextView txt1;
  26. Button send;
  27. EditText ed1;
  28. String geted1;
  29. public Handler myHandler = new Handler() {
  30. @Override
  31. public void handleMessage(Message msg) {
  32. if (msg.what == 0x11) {
  33. Bundle bundle = msg.getData();
  34. txt1.append("server:"+bundle.getString("msg")+"\n");
  35. }
  36. }
  38. };
  40. @Override
  41. protected void onCreate(Bundle savedInstanceState) {
  42. super.onCreate(savedInstanceState);
  43. setContentView(R.layout.activity_main);
  44. txt1 = (TextView) findViewById(R.id.txt1);
  45. send = (Button) findViewById(R.id.send);
  46. ed1 = (EditText) findViewById(R.id.ed1);
  47. send.setOnClickListener(new OnClickListener() {
  49. @Override
  50. public void onClick(View v) {
  51. geted1 = ed1.getText().toString();
  52. txt1.append("client:"+geted1+"\n");
  53. //启动线程向服务器发送和接收信息
  54. new MyThread(geted1).start();
  55. }
  56. });
  58. }
  60. class MyThread extends Thread {
  62. public String txt1;
  64. public MyThread(String str) {
  65. txt1 = str;
  66. }
  68. @Override
  69. public void run() {
  70. //定义消息
  71. Message msg = new Message();
  72. msg.what = 0x11;
  73. Bundle bundle = new Bundle();
  74. bundle.clear();
  75. try {
  76. //连接服务器并设置连接超时为5秒
  77. socket = new Socket();
  78. socket.connect(new InetSocketAddress("1.1.9.30", 30000), 5000);
  79. //获取输入输出流
  80. OutputStream ou = socket.getOutputStream();
  81. BufferedReader bff = new BufferedReader(new InputStreamReader(
  82. socket.getInputStream()));
  83. //读取发来服务器信息
  84. String line = null;
  85. buffer="";
  86. while ((line = bff.readLine()) != null) {
  87. buffer = line + buffer;
  88. }
  90. //向服务器发送信息
  91. ou.write("android 客户端".getBytes("gbk"));
  92. ou.flush();
  93. bundle.putString("msg", buffer.toString());
  94. msg.setData(bundle);
  95. //发送消息修改UI线程中的组件
  96. myHandler.sendMessage(msg);
  97. //关闭各种输入输出流
  98. bff.close();
  99. ou.close();
  100. socket.close();
  101. } catch (SocketTimeoutException aa) {
  102. //连接超时在UI界面显示消息
  103. bundle.putString("msg", "服务器连接失败！请检查网络是否打开");
  104. msg.setData(bundle);
  105. //发送消息修改UI线程中的组件
  106. myHandler.sendMessage(msg);
  107. } catch (IOException e) {
  108. e.printStackTrace();
  109. }
  110. }
  111. }
  113. @Override
  114. public boolean onCreateOptionsMenu(Menu menu) {
  115. // Inflate the menu; this adds items to the action bar if it is present.
  116. getMenuInflater().inflate(R.menu.main, menu);
  117. return true;
  118. }
  120. }
```
package com.android.xiong.simplesocket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {
	Socket socket = null;
	String buffer = "";
	TextView txt1;
	Button send;
	EditText ed1;
	String geted1;
	public Handler myHandler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			if (msg.what == 0x11) {
				Bundle bundle = msg.getData();
				txt1.append("server:"+bundle.getString("msg")+"\n");
			}
		}

	};

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		txt1 = (TextView) findViewById(R.id.txt1);
		send = (Button) findViewById(R.id.send);
		ed1 = (EditText) findViewById(R.id.ed1);
		send.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				geted1 = ed1.getText().toString();
				txt1.append("client:"+geted1+"\n");
				//启动线程 向服务器发送和接收信息
				new MyThread(geted1).start();
			}
		});

	}

	class MyThread extends Thread {

		public String txt1;

		public MyThread(String str) {
			txt1 = str;
		}

		@Override
		public void run() {
			//定义消息
			Message msg = new Message();
			msg.what = 0x11;
			Bundle bundle = new Bundle();
			bundle.clear();
			try {
				//连接服务器 并设置连接超时为5秒
				socket = new Socket();
				socket.connect(new InetSocketAddress("1.1.9.30", 30000), 5000);
				//获取输入输出流
				OutputStream ou = socket.getOutputStream();
				BufferedReader bff = new BufferedReader(new InputStreamReader(
						socket.getInputStream()));
				//读取发来服务器信息
				String line = null;
				buffer="";
				while ((line = bff.readLine()) != null) {
					buffer = line + buffer;
				}
				
				//向服务器发送信息
				ou.write("android 客户端".getBytes("gbk"));
				ou.flush();
				bundle.putString("msg", buffer.toString());
				msg.setData(bundle);
				//发送消息 修改UI线程中的组件
				myHandler.sendMessage(msg);
				//关闭各种输入输出流
				bff.close();
				ou.close();
				socket.close();
			} catch (SocketTimeoutException aa) {
				//连接超时 在UI界面显示消息
				bundle.putString("msg", "服务器连接失败！请检查网络是否打开");
				msg.setData(bundle);
				//发送消息 修改UI线程中的组件
				myHandler.sendMessage(msg);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}
```
  [html] view plain copy print ?
  1. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2. xmlns:tools="http://schemas.android.com/tools"
  3. android:layout_width="match_parent"
  4. android:layout_height="match_parent"
  5. android:paddingBottom="@dimen/activity_vertical_margin"
  6. android:paddingLeft="@dimen/activity_horizontal_margin"
  7. android:paddingRight="@dimen/activity_horizontal_margin"
  8. android:paddingTop="@dimen/activity_vertical_margin"
  9. tools:context=".MainActivity" >
  11. <EditText
  12. android:id="@+id/ed1"
  13. android:layout_width="match_parent"
  14. android:layout_height="wrap_content"
  15. android:hint="给服务器发送信息"/>
  16. <Button
  17. android:id="@+id/send"
  18. android:layout_width="match_parent"
  19. android:layout_height="wrap_content"
  20. android:layout_below="@id/ed1"
  21. android:text="发送"/>
  22. <TextView
  23. android:id="@+id/txt1"
  24. android:layout_width="match_parent"
  25. android:layout_height="wrap_content"
  26. android:layout_below="@id/send"/>
  31. </RelativeLayout>
```
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <EditText 
        android:id="@+id/ed1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="给服务器发送信息"/>
    <Button 
        android:id="@+id/send"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/ed1"
        android:text="发送"/>
    <TextView 
        android:id="@+id/txt1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/send"/>
    
    


</RelativeLayout>
```
  服务端
  [java] view plain copy print ?
  1. package com.android.net;
  3. import java.io.IOException;
  4. import java.net.ServerSocket;
  5. import java.net.Socket;
  6. import java.util.ArrayList;
  7. import java.util.List;
  9. public class AndroidService {
  12. public static void main(String[] args) throws IOException {
  13. ServerSocket serivce = new ServerSocket(30000);
  14. while (true) {
  15. //等待客户端连接
  16. Socket socket = serivce.accept();
  17. new Thread(new AndroidRunable(socket)).start();
  18. }
  19. }
  21. }
```
package com.android.net;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class AndroidService {


	public static void main(String[] args) throws IOException {
		ServerSocket serivce = new ServerSocket(30000);
		while (true) {
			//等待客户端连接
			Socket socket = serivce.accept();
			new Thread(new AndroidRunable(socket)).start();
		}
	}

}
```
  [java] view plain copy print ?
  1. package com.android.net;
  3. import java.io.BufferedReader;
  4. import java.io.BufferedWriter;
  5. import java.io.IOException;
  6. import java.io.InputStream;
  7. import java.io.InputStreamReader;
  8. import java.io.OutputStream;
  9. import java.io.OutputStreamWriter;
  10. import java.io.PrintWriter;
  11. import java.net.Socket;
  13. public class AndroidRunable implements Runnable {
  15. Socket socket = null;
  17. public AndroidRunable(Socket socket) {
  18. this.socket = socket;
  19. }
  21. @Override
  22. public void run() {
  23. // 向android客户端输出hello worild
  24. String line = null;
  25. InputStream input;
  26. OutputStream output;
  27. String str = "hello world!";
  28. try {
  29. //向客户端发送信息
  30. output = socket.getOutputStream();
  31. input = socket.getInputStream();
  32. BufferedReader bff = new BufferedReader(
  33. new InputStreamReader(input));
  34. output.write(str.getBytes("gbk"));
  35. output.flush();
  36. //半关闭socket
  37. socket.shutdownOutput();
  38. //获取客户端的信息
  39. while ((line = bff.readLine()) != null) {
  40. System.out.print(line);
  41. }
  42. //关闭输入输出流
  43. output.close();
  44. bff.close();
  45. input.close();
  46. socket.close();
  48. } catch (IOException e) {
  49. e.printStackTrace();
  50. }
  52. }
  53. }
```
package com.android.net;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;

public class AndroidRunable implements Runnable {

	Socket socket = null;

	public AndroidRunable(Socket socket) {
		this.socket = socket;
	}

	@Override
	public void run() {
		// 向android客户端输出hello worild
		String line = null;
		InputStream input;
		OutputStream output;
		String str = "hello world!";
		try {
			//向客户端发送信息
			output = socket.getOutputStream();
			input = socket.getInputStream();
			BufferedReader bff = new BufferedReader(
					new InputStreamReader(input));
			output.write(str.getBytes("gbk"));
			output.flush();
			//半关闭socket  
			socket.shutdownOutput();
			//获取客户端的信息
			while ((line = bff.readLine()) != null) {
				System.out.print(line);
			}
			//关闭输入输出流
			output.close();
			bff.close();
			input.close();
			socket.close();

		} catch (IOException e) {
			e.printStackTrace();
		}

	}
}
```
  实例二
  
  客户端
  [java] view plain copy print ?
  1. package com.android.xiong.sockettwotest;
  3. import android.app.Activity;
  4. import android.os.Bundle;
  5. import android.os.Handler;
  6. import android.os.Message;
  7. import android.view.Menu;
  8. import android.view.View;
  9. import android.view.View.OnClickListener;
  10. import android.widget.Button;
  11. import android.widget.EditText;
  12. import android.widget.TextView;
  14. public class MainActivity extends Activity {
  16. // 定义界面上的两个文本框
  17. EditText input;
  18. TextView show;
  19. // 定义界面上的一个按钮
  20. Button send;
  21. Handler handler;
  22. // 定义与服务器通信的子线程
  23. ClientThread clientThread;
  25. @Override
  26. protected void onCreate(Bundle savedInstanceState) {
  27. super.onCreate(savedInstanceState);
  28. setContentView(R.layout.activity_main);
  29. input = (EditText) findViewById(R.id.input);
  30. show = (TextView) findViewById(R.id.show);
  31. send = (Button) findViewById(R.id.send);
  32. handler = new Handler() {
  34. @Override
  35. public void handleMessage(Message msg) {
  36. // 如果消息来自子线程
  37. if (msg.what == 0x123) {
  38. // 将读取的内容追加显示在文本框中
  39. show.append("\n" + msg.obj.toString());
  40. }
  41. }
  42. };
  43. clientThread = new ClientThread(handler);
  44. // 客户端启动ClientThread线程创建网络连接、读取来自服务器的数据
  45. new Thread(clientThread).start();
  46. send.setOnClickListener(new OnClickListener() {
  48. @Override
  49. public void onClick(View v) {
  50. try {
  51. // 当用户按下按钮之后，将用户输入的数据封装成Message
  52. // 然后发送给子线程Handler
  53. Message msg = new Message();
  54. msg.what = 0x345;
  55. msg.obj = input.getText().toString();
  56. clientThread.revHandler.sendMessage(msg);
  57. input.setText("");
  59. } catch (Exception e) {
  61. }
  62. }
  63. });
  64. }
  66. @Override
  67. public boolean onCreateOptionsMenu(Menu menu) {
  68. getMenuInflater().inflate(R.menu.main, menu);
  69. return true;
  70. }
  72. }
```
package com.android.xiong.sockettwotest;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

	// 定义界面上的两个文本框
	EditText input;
	TextView show;
	// 定义界面上的一个按钮
	Button send;
	Handler handler;
	// 定义与服务器通信的子线程
	ClientThread clientThread;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		input = (EditText) findViewById(R.id.input);
		show = (TextView) findViewById(R.id.show);
		send = (Button) findViewById(R.id.send);
		handler = new Handler() {

			@Override
			public void handleMessage(Message msg) {
				// 如果消息来自子线程
				if (msg.what == 0x123) {
					// 将读取的内容追加显示在文本框中
					show.append("\n" + msg.obj.toString());
				}
			}
		};
		clientThread = new ClientThread(handler);
		// 客户端启动ClientThread线程创建网络连接、读取来自服务器的数据
		new Thread(clientThread).start();
		send.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				try {
					// 当用户按下按钮之后，将用户输入的数据封装成Message
					// 然后发送给子线程Handler
					Message msg = new Message();
					msg.what = 0x345;
					msg.obj = input.getText().toString();
					clientThread.revHandler.sendMessage(msg);
					input.setText("");

				} catch (Exception e) {

				}
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}
```
  [java] view plain copy print ?
  1. package com.android.xiong.sockettwotest;
  3. import java.io.BufferedReader;
  4. import java.io.IOException;
  5. import java.io.InputStreamReader;
  6. import java.io.OutputStream;
  7. import java.net.InetSocketAddress;
  8. import java.net.Socket;
  9. import java.net.SocketTimeoutException;
  11. import android.os.Handler;
  12. import android.os.Looper;
  13. import android.os.Message;
  15. public class ClientThread implements Runnable {
  16. private Socket s;
  17. // 定义向UI线程发送消息的Handler对象
  18. Handler handler;
  19. // 定义接收UI线程的Handler对象
  20. Handler revHandler;
  21. // 该线程处理Socket所对用的输入输出流
  22. BufferedReader br = null;
  23. OutputStream os = null;
  25. public ClientThread(Handler handler) {
  26. this.handler = handler;
  27. }
  29. @Override
  30. public void run() {
  31. s = new Socket();
  32. try {
  33. s.connect(new InetSocketAddress("1.1.9.30", 3000), 5000);
  34. br = new BufferedReader(new InputStreamReader(s.getInputStream()));
  35. os = s.getOutputStream();
  36. // 启动一条子线程来读取服务器相应的数据
  37. new Thread() {
  39. @Override
  40. public void run() {
  41. String content = null;
  42. // 不断的读取Socket输入流的内容
  43. try {
  44. while ((content = br.readLine()) != null) {
  45. // 每当读取到来自服务器的数据之后，发送的消息通知程序
  46. // 界面显示该数据
  47. Message msg = new Message();
  48. msg.what = 0x123;
  49. msg.obj = content;
  50. handler.sendMessage(msg);
  51. }
  52. } catch (IOException io) {
  53. io.printStackTrace();
  54. }
  55. }
  57. }.start();
  58. // 为当前线程初始化Looper
  59. Looper.prepare();
  60. // 创建revHandler对象
  61. revHandler = new Handler() {
  63. @Override
  64. public void handleMessage(Message msg) {
  65. // 接收到UI线程的中用户输入的数据
  66. if (msg.what == 0x345) {
  67. // 将用户在文本框输入的内容写入网络
  68. try {
  69. os.write((msg.obj.toString() + "\r\n")
  70. .getBytes("gbk"));
  71. } catch (Exception e) {
  72. e.printStackTrace();
  73. }
  74. }
  75. }
  77. };
  78. // 启动Looper
  79. Looper.loop();
  81. } catch (SocketTimeoutException e) {
  82. Message msg = new Message();
  83. msg.what = 0x123;
  84. msg.obj = "网络连接超时！";
  85. handler.sendMessage(msg);
  86. } catch (IOException io) {
  87. io.printStackTrace();
  88. }
  90. }
  91. }
```
package com.android.xiong.sockettwotest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;

import android.os.Handler;
import android.os.Looper;
import android.os.Message;

public class ClientThread implements Runnable {
	private Socket s;
	// 定义向UI线程发送消息的Handler对象
	Handler handler;
	// 定义接收UI线程的Handler对象
	Handler revHandler;
	// 该线程处理Socket所对用的输入输出流
	BufferedReader br = null;
	OutputStream os = null;

	public ClientThread(Handler handler) {
		this.handler = handler;
	}

	@Override
	public void run() {
		s = new Socket();
		try {
			s.connect(new InetSocketAddress("1.1.9.30", 3000), 5000);
			br = new BufferedReader(new InputStreamReader(s.getInputStream()));
			os = s.getOutputStream();
			// 启动一条子线程来读取服务器相应的数据
			new Thread() {

				@Override
				public void run() {
					String content = null;
					// 不断的读取Socket输入流的内容
					try {
						while ((content = br.readLine()) != null) {
							// 每当读取到来自服务器的数据之后，发送的消息通知程序
							// 界面显示该数据
							Message msg = new Message();
							msg.what = 0x123;
							msg.obj = content;
							handler.sendMessage(msg);
						}
					} catch (IOException io) {
						io.printStackTrace();
					}
				}

			}.start();
			// 为当前线程初始化Looper
			Looper.prepare();
			// 创建revHandler对象
			revHandler = new Handler() {

				@Override
				public void handleMessage(Message msg) {
					// 接收到UI线程的中用户输入的数据
					if (msg.what == 0x345) {
						// 将用户在文本框输入的内容写入网络
						try {
							os.write((msg.obj.toString() + "\r\n")
									.getBytes("gbk"));
						} catch (Exception e) {
							e.printStackTrace();
						}
					}
				}

			}; 
			// 启动Looper
			Looper.loop();

		} catch (SocketTimeoutException e) {
			Message msg = new Message();
			msg.what = 0x123;
			msg.obj = "网络连接超时！";
			handler.sendMessage(msg);
		} catch (IOException io) {
			io.printStackTrace();
		}

	}
}
```
  [html] view plain copy print ?
  1. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2. xmlns:tools="http://schemas.android.com/tools"
  3. android:layout_width="match_parent"
  4. android:layout_height="match_parent"
  5. android:paddingBottom="@dimen/activity_vertical_margin"
  6. android:paddingLeft="@dimen/activity_horizontal_margin"
  7. android:paddingRight="@dimen/activity_horizontal_margin"
  8. android:paddingTop="@dimen/activity_vertical_margin"
  9. tools:context=".MainActivity" >
  11. <EditText
  12. android:id="@+id/input"
  13. android:layout_width="match_parent"
  14. android:layout_height="wrap_content"
  15. android:hint="@string/input" />
  16. <Button
  17. android:id="@+id/send"
  18. android:layout_width="match_parent"
  19. android:layout_height="wrap_content"
  20. android:text="@string/send"
  21. android:layout_below="@id/input"/>
  22. <TextView
  23. android:id="@+id/show"
  24. android:layout_width="match_parent"
  25. android:layout_height="wrap_content"
  26. android:layout_below="@id/send"/>
  28. </RelativeLayout>
```
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/input" />
    <Button 
        android:id="@+id/send"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/send"
        android:layout_below="@id/input"/>
    <TextView 
        android:id="@+id/show"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/send"/>

</RelativeLayout>
```
  服务端
  [java] view plain copy print ?
  1. package com.android.net;
  3. import java.io.IOException;
  4. import java.net.ServerSocket;
  5. import java.net.Socket;
  6. import java.util.ArrayList;
  7. import java.util.List;
  9. public class MyService {
  11. // 定义保存所有的Socket
  12. public static List<Socket> socketList = new ArrayList<Socket>();
  14. public static void main(String[] args) throws IOException {
  15. ServerSocket server = new ServerSocket(3000);
  16. while(true){
  17. Socket s=server.accept();
  18. socketList.add(s);
  19. //每当客户端连接之后启动一条ServerThread线程为该客户端服务
  20. new Thread(new ServiceThreada(s)).start();
  22. }
  23. }
  25. }
```
package com.android.net;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class MyService {

	// 定义保存所有的Socket
	public static List<Socket> socketList = new ArrayList<Socket>();

	public static void main(String[] args) throws IOException {
		ServerSocket server = new ServerSocket(3000);
		while(true){
			Socket s=server.accept();
			socketList.add(s);
			//每当客户端连接之后启动一条ServerThread线程为该客户端服务
			new Thread(new ServiceThreada(s)).start();
			
		}
	}

}
```
  [java] view plain copy print ?
  1. package com.android.net;
  3. import java.io.BufferedReader;
  4. import java.io.IOException;
  5. import java.io.InputStreamReader;
  6. import java.io.OutputStream;
  7. import java.net.Socket;
  9. public class ServiceThreada implements Runnable {
  11. // 定义当前线程处理的Socket
  12. Socket s = null;
  13. // 该线程所处理的Socket所对应的输入流
  14. BufferedReader br = null;
  16. public ServiceThreada(Socket s) {
  17. this.s = s;
  18. try {
  19. br = new BufferedReader(new InputStreamReader(s.getInputStream()));
  20. } catch (IOException e) {
  21. e.printStackTrace();
  22. }
  23. }
  25. @Override
  26. public void run() {
  28. String content = null;
  29. //采用循环不断的从Socket中读取客户端发送过来的数据
  30. while((content=readFromClient())!=null){
  31. //遍历socketList中的每个Socket
  32. //将读取到的内容每个向Socket发送一次
  33. for(Socket s:MyService.socketList){
  34. OutputStream os;
  35. try {
  36. os = s.getOutputStream();
  37. os.write((content+"\n").getBytes("gbk"));
  38. } catch (IOException e) {
  39. // TODO Auto-generated catch block
  40. e.printStackTrace();
  41. }
  43. }
  44. }
  46. }
  48. // 定义读取客户端的信息
  49. public String readFromClient() {
  50. try {
  51. return br.readLine();
  52. } catch (Exception e) {
  53. e.printStackTrace();
  54. }
  55. return null;
  56. }
  58. }