Java 获取Linux 的IP地址

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.InterfaceAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.springframework.http.HttpMethod;

/**
 * 常用工具类
 *
 * @author 席红蕾
 * @date 2016-09-27
 * @version 1.0
 */
public class WebToolUtils {

	/**
	 * 获取本地IP地址
	 *
	 * @throws SocketException
	 */
	public static String getLocalIP() throws UnknownHostException, SocketException {
		if (isWindowsOS()) {
			return InetAddress.getLocalHost().getHostAddress();
		} else {
			return getLinuxLocalIp();
		}
	}

	/**
	 * 判断操作系统是否是Windows
	 *
	 * @return
	 */
	public static boolean isWindowsOS() {
		boolean isWindowsOS = false;
		String osName = System.getProperty("os.name");
		if (osName.toLowerCase().indexOf("windows") > -1) {
			isWindowsOS = true;
		}
		return isWindowsOS;
	}

	/**
	 * 获取本地Host名称
	 */
	public static String getLocalHostName() throws UnknownHostException {
		return InetAddress.getLocalHost().getHostName();
	}

	/**
	 * 获取Linux下的IP地址
	 *
	 * @return IP地址
	 * @throws SocketException
	 */
	private static String getLinuxLocalIp() throws SocketException {
		String ip = "";
		try {
			for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
				NetworkInterface intf = en.nextElement();
				String name = intf.getName();
				if (!name.contains("docker") && !name.contains("lo")) {
					for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
						InetAddress inetAddress = enumIpAddr.nextElement();
						if (!inetAddress.isLoopbackAddress()) {
							String ipaddress = inetAddress.getHostAddress().toString();
							if (!ipaddress.contains("::") && !ipaddress.contains("0:0:") && !ipaddress.contains("fe80")) {
								ip = ipaddress;
								System.out.println(ipaddress);
							}
						}
					}
				}
			}
		} catch (SocketException ex) {
			System.out.println("获取ip地址异常");
			ip = "127.0.0.1";
			ex.printStackTrace();
		}
		System.out.println("IP:"+ip);
		return ip;
	}

	/**
	 * 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
	 *
	 * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
	 * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
	 *
	 * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
	 * 192.168.1.100
	 *
	 * 用户真实IP为： 192.168.1.110
	 *
	 * @param request
	 * @return
	 */
	public static String getIpAddress(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_CLIENT_IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_X_FORWARDED_FOR");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}
		return ip;
	}

	/**
	 * 向指定URL发送GET方法的请求
	 *
	 * @param url
	 *            发送请求的URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return URL 所代表远程资源的响应结果
	 */
	// public static String sendGet(String url, String param) {
	// String result = "";
	// BufferedReader in = null;
	// try {
	// String urlNameString = url + "?" + param;
	// URL realUrl = new URL(urlNameString);
	// // 打开和URL之间的连接
	// URLConnection connection = realUrl.openConnection();
	// // 设置通用的请求属性
	// connection.setRequestProperty("accept", "*/*");
	// connection.setRequestProperty("connection", "Keep-Alive");
	// connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible;
	// MSIE 6.0; Windows NT 5.1;SV1)");
	// // 建立实际的连接
	// connection.connect();
	// // 获取所有响应头字段
	// Map<String, List<String>> map = connection.getHeaderFields();
	// // 遍历所有的响应头字段
	// for (String key : map.keySet()) {
	// System.out.println(key + "--->" + map.get(key));
	// }
	// // 定义 BufferedReader输入流来读取URL的响应
	// in = new BufferedReader(new
	// InputStreamReader(connection.getInputStream()));
	// String line;
	// while ((line = in.readLine()) != null) {
	// result += line;
	// }
	// } catch (Exception e) {
	// System.out.println("发送GET请求出现异常！" + e);
	// e.printStackTrace();
	// }
	// // 使用finally块来关闭输入流
	// finally {
	// try {
	// if (in != null) {
	// in.close();
	// }
	// } catch (Exception e2) {
	// e2.printStackTrace();
	// }
	// }
	// return result;
	// }

	/**
	 * 向指定 URL 发送POST方法的请求
	 *
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static void sendPost(String pathUrl, String name, String pwd, String phone, String content) {
		// PrintWriter out = null;
		// BufferedReader in = null;
		// String result = "";
		// try {
		// URL realUrl = new URL(url);
		// // 打开和URL之间的连接
		// URLConnection conn = realUrl.openConnection();
		// // 设置通用的请求属性
		// conn.setRequestProperty("accept", "*/*");
		// conn.setRequestProperty("connection", "Keep-Alive");
		// conn.setRequestProperty("user-agent",
		// "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
		// // 发送POST请求必须设置如下两行
		// conn.setDoOutput(true);
		// conn.setDoInput(true);
		// // 获取URLConnection对象对应的输出流
		// out = new PrintWriter(conn.getOutputStream());
		// // 发送请求参数
		// out.print(param);
		// // flush输出流的缓冲
		// out.flush();
		// // 定义BufferedReader输入流来读取URL的响应
		// in = new BufferedReader(
		// new InputStreamReader(conn.getInputStream()));
		// String line;
		// while ((line = in.readLine()) != null) {
		// result += line;
		// }
		// } catch (Exception e) {
		// System.out.println("发送 POST 请求出现异常！"+e);
		// e.printStackTrace();
		// }
		// //使用finally块来关闭输出流、输入流
		// finally{
		// try{
		// if(out!=null){
		// out.close();
		// }
		// if(in!=null){
		// in.close();
		// }
		// }
		// catch(IOException ex){
		// ex.printStackTrace();
		// }
		// }
		// return result;
		try {
			// 建立连接
			URL url = new URL(pathUrl);
			HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();

			// //设置连接属性
			httpConn.setDoOutput(true);// 使用 URL 连接进行输出
			httpConn.setDoInput(true);// 使用 URL 连接进行输入
			httpConn.setUseCaches(false);// 忽略缓存
			httpConn.setRequestMethod("POST");// 设置URL请求方法
			String requestString = "客服端要以以流方式发送到服务端的数据...";

			// 设置请求属性
			// 获得数据字节数据，请求数据流的编码，必须和下面服务器端处理请求流的编码一致
			byte[] requestStringBytes = requestString.getBytes("utf-8");
			httpConn.setRequestProperty("Content-length", "" + requestStringBytes.length);
			httpConn.setRequestProperty("Content-Type", "	application/x-www-form-urlencoded");
			httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接
			httpConn.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
			httpConn.setRequestProperty("Accept-Encoding", "gzip, deflate");
			httpConn.setRequestProperty("Accept-Language", "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3");
			httpConn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:49.0) Gecko/20100101 Firefox/49.0");
			httpConn.setRequestProperty("Upgrade-Insecure-Requests", "1");

			httpConn.setRequestProperty("account", name);
			httpConn.setRequestProperty("passwd", pwd);
			httpConn.setRequestProperty("phone", phone);
			httpConn.setRequestProperty("content", content);

			// 建立输出流，并写入数据
			OutputStream outputStream = httpConn.getOutputStream();
			outputStream.write(requestStringBytes);
			outputStream.close();
			// 获得响应状态
			int responseCode = httpConn.getResponseCode();

			if (HttpURLConnection.HTTP_OK == responseCode) {// 连接成功
				// 当正确响应时处理数据
				StringBuffer sb = new StringBuffer();
				String readLine;
				BufferedReader responseReader;
				// 处理响应流，必须与服务器响应流输出的编码一致
				responseReader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), "utf-8"));
				while ((readLine = responseReader.readLine()) != null) {
					sb.append(readLine).append("\n");
				}
				responseReader.close();
			}
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	/**
	 * 执行一个HTTP POST请求，返回请求响应的HTML
	 *
	 * @param url
	 *            请求的URL地址
	 * @param params
	 *            请求的查询参数,可以为null
	 * @return 返回请求响应的HTML
	 */
	public static void doPost(String url, String name, String pwd, String phone, String content) {
		// 创建默认的httpClient实例.
		CloseableHttpClient httpclient = HttpClients.createDefault();
		// 创建httppost
		HttpPost httppost = new HttpPost(url);
		// 创建参数队列
		List<NameValuePair> formparams = new ArrayList<NameValuePair>();
		formparams.add(new BasicNameValuePair("account", name));
		formparams.add(new BasicNameValuePair("passwd", pwd));
		formparams.add(new BasicNameValuePair("phone", phone));
		formparams.add(new BasicNameValuePair("content", content));

		UrlEncodedFormEntity uefEntity;
		try {
			uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");
			httppost.setEntity(uefEntity);
			System.out.println("executing request " + httppost.getURI());
			CloseableHttpResponse response = httpclient.execute(httppost);
			try {
				HttpEntity entity = response.getEntity();
				if (entity != null) {
					System.out.println("--------------------------------------");
					System.out.println("Response content: " + EntityUtils.toString(entity, "UTF-8"));
					System.out.println("--------------------------------------");
				}
			} finally {
				response.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			// 关闭连接,释放资源
			try {
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

	}
}