java 获取服务器真实IP的实例

前言：

根据操作系统的不同,获取的结果不同,故需要区分系统,分别获取

实现代码：

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-ameValuePair("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(); } } }}

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