网络通信InetAddress、URL

主要介绍：InetAddress、URL

import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.UnknownHostException;
import java.util.Arrays;

public class SocketTest {

public static void main(String[] args) {
// TODO Auto-generated method stub
inetAddressTest();
urlTest();
}

/**
* 获取网络资源
*/
private static void urlTest() {
// TODO Auto-generated method stub
try {
//创建一个URL实例
URL imooc = new URL("http://www.baidu.com");
//？后面表示参数 #后面表示锚点
URL url = new URL(imooc,"/index.html?username=tom#test");
System.out.println("协议:"+url.getProtocol());
System.out.println("主机:"+url.getHost());
//如果未指定端口号，则使用默认端口号
System.out.println("端口："+url.getPort());
System.out.println("文件路径"+url.getPath());
System.out.println("文件名:"+url.getFile());
System.out.println("相对路径:"+url.getRef());
System.out.println("查询字符串:"+url.getQuery());
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

/**
*获取硬件资源
*/
private static void inetAddressTest() {
// TODO Auto-generated method stub
InetAddress address;
try {
address = InetAddress.getLocalHost(); //获取本机地址
// address = InetAddress.getByName("本机计算机名"); //获取本机地址,通过名字
// address = InetAddress.getByName("本机IP"); //获取本机地址,通过IP

//输出本机计算机名
System.out.println("计算机名:"+address.getHostName());
//输出本机IP
System.out.println("ip:"+address.getHostAddress());

byte[] addByte = address.getAddress();
//byte范围在-128~127
System.out.println("字节形式数组IP:"+Arrays.toString(addByte));

//输出计算机名和IP
System.out.println(address);
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}