Java Socket编程总结篇（一）

/**
*@ author StormMaybin
*@ date 2016-10-03
*/

生命不息，奋斗不止

连接到服务器

package com.stormma.socket;

import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class SocketConnect
{

    /**
     * @param args
     * @throws IOException 
     * @throws UnknownHostException 
     */
    public static void main(String[] args) throws UnknownHostException, IOException
    {
        // TODO Auto-generated method stub
        //带资源的try语句
        //time-A.timefreq.bldrdoc.gov为一个事件服务，对应ip132.164.4.103
        /**
         * Socket (String host, int port)
         * host是主机名，port是端口号
         */
        try(Socket s = new Socket ("time-A.timefreq.bldrdoc.gov", 13))
        {
            //得到输入流
            InputStream inStream = s.getInputStream();
            Scanner in = new Scanner (inStream);

            while (in.hasNext())
            {
                String line = in.nextLine();
                System.out.println(line);
            }
        }
    }
}

设置套接字超时间

//设置超时时间为10s,单位毫秒值
s.setSoTimeout (10000);

获取主机信息

package com.stormma.socket;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class SocketDemo
{

    /**
     * 获取主机的信息
     * @param args
     */
    public static void main(String[] args)
    {
        // TODO Auto-generated method stub
        InetAddress address = null;
        try
        {
            address = InetAddress.getLocalHost();
        } 
        catch (UnknownHostException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("主机名"+address.getHostName());
        System.out.println("IP地址"+address.getHostAddress());

        InetAddress address1 = null;
        //根据IP地址获取主机名
        try
        {
            address1 = InetAddress.getByName("192.168.30.1");
            System.out.println("根据IP地址获取主机名" + address1.getHostName());
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        //根据主机名获取IP地址信息
        InetAddress address2 = null;
        try
        {
            address2 = InetAddress.getByName("StormMaybin");
            System.out.println("根据主机名获取到IP地址" + address2.getHostAddress());
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}

实现服务器端

package com.stormma.socket;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

public class Server
{

    /**
     * @param args
     * @throws IOException 
     */
    public static void main(String[] args) throws IOException
    {
        // TODO Auto-generated method stub
        System.out.println("服务器已经启动，等待连接······");
        try(ServerSocket s = new ServerSocket(8888))
        {
            //没有客户端连接时一直阻塞，直到客户端连接
            try (Socket incoming = s.accept())
            {
                System.out.println("有客户端连入");
                //得到输入流
                InputStream inStream = incoming.getInputStream();
                //得到输出流
                OutputStream outStream = incoming.getOutputStream();

                try (Scanner in = new Scanner (inStream))
                {
                    PrintWriter out = new PrintWriter(outStream);

                    out.println("客户端，你好！退出请输入exit!");

                    boolean flag = false;
                    while (!flag && in.hasNext())
                    {
                        String line = in.nextLine();
                        out.println(line);
                        if (line.trim().toLowerCase().equals("exit"))
                        {
                            flag = true;
                        }
                    }
                }
            }
        }
    }
}

实现客户端

package com.stormma.socket;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;


public class Client
{

    /**
     * @param args
     */
    private static final String host = "localhost";
    private static final int port = 8888;
    public static void main(String[] args) throws UnknownHostException, IOException
    {
        // TODO Auto-generated method stub
        try (Socket s = new Socket (host, port))
        {
            InputStream inStream = s.getInputStream();
            OutputStream outStream = s.getOutputStream();

            PrintWriter out = new PrintWriter(outStream);
            //输入流读取
            Scanner scan = new Scanner(inStream);
            //控制台输入
            Scanner in = new Scanner(System.in);
            //标记，如果是0则读取输入流的，如果是1读取客户端
            int turn = 0;
            if (turn == 0)
            {
                String responce = scan.nextLine();
                System.out.println("服务端说: "+responce);
                turn = 1;
            }
            if (turn == 1)
            {
                String line = in.nextLine();
                //写入到输出流中   发送信息到服务器
                out.write(line);
                turn = 0;
            }
        }
    }
}

第一篇就到这，如有错误，欢迎指出。