本文實(shí)例講述了Java獲取用戶訪問(wèn)IP及地理位置的方法。分享給大家供大家參考，具體如下：

獲取用戶訪問(wèn)的IP地址

/** * 獲取用戶ip地址 * @return */public static String getIp(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;}

IP地址獲取到后可以根據(jù)ip地址獲取地址位置

獲取ip地址有多種方法，可以調(diào)用百度，高度地圖的ip定位api服務(wù)，也可以調(diào)用網(wǎng)上的根據(jù)ip獲取定位的請(qǐng)求

高度地圖的ip定位api服務(wù)獲取

調(diào)用百度的ip定位api服務(wù) 詳見(jiàn)​​​http://lbsyun.baidu.com/index.php?title=webapi/ip-api

首先需要在百度地圖開(kāi)放平臺(tái)申請(qǐng)一個(gè)百度地圖的ak

百度地圖開(kāi)放平臺(tái)：http://lbsyun.baidu.com/

創(chuàng)建連接，并讀取返回的json數(shù)據(jù)，返回一個(gè)json格式的數(shù)據(jù)。

對(duì)json轉(zhuǎn)換不了解的可以訪問(wèn)：Alibaba Fastjson——超好用的JOSN解析庫(kù)

/** * 讀取 * * @param rd * @return * @throws IOException */private static String readAll(Reader rd) throws IOException {StringBuilder sb = new StringBuilder();int cp;while ((cp = rd.read()) != -1) {sb.append((char) cp);}return sb.toString();} /** * 創(chuàng)建鏈接 * * @param url * @return * @throws IOException * @throws JSONException */private static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {InputStream is = new URL(url).openStream();try {BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName('UTF-8')));String jsonText = readAll(rd);JSONObject json = JSONObject.parseObject(jsonText);return json;} finally {is.close();}}

根據(jù)http://api.map.baidu.com/location/ip?ip='+ip+'&ak='+ak這個(gè)網(wǎng)址去請(qǐng)求地理位置的json數(shù)據(jù)

返回的json格式數(shù)據(jù)：

獲取請(qǐng)求返回的數(shù)據(jù)（根據(jù)自己需求去獲取）

/** * 百度獲取城市信息 * * @param ip * @return * @throws JSONException * @throws IOException */public static void main(String[] args) throws JSONException, IOException {String ip = '';// 百度地圖申請(qǐng)的akString ak = '';// 這里調(diào)用百度的ip定位api服務(wù) 詳見(jiàn) http://api.map.baidu.com/lbsapi/cloud/ip-location-api.htmJSONObject json = readJsonFromUrl('http://api.map.baidu.com/location/ip?ip='+ip+'&ak='+ak); //這里只取出了兩個(gè)參數(shù)，根據(jù)自己需求去獲取 JSONObject obj = (JSONObject) ((JSONObject) json.get('content')).get('address_detail');String province = obj.getString('province');System.out.println(province);JSONObject obj2 = (JSONObject) json.get('content');String address = obj2.getString('address');System.out.println(address);}

輸出

調(diào)用網(wǎng)上的根據(jù)ip獲取定位的請(qǐng)求

根據(jù)http://freeapi.ipip.net/ip這個(gè)網(wǎng)址可以獲取到ip對(duì)應(yīng)的地理位置，之后發(fā)送請(qǐng)求去解析json數(shù)據(jù)

和上面方法基本一樣，上面以為是一個(gè)json對(duì)象格式，這里是一個(gè)json數(shù)組格式，所以轉(zhuǎn)換和獲取數(shù)據(jù)方法不太一樣具體代碼如下

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.Reader;import java.net.URL;import java.nio.charset.Charset; import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONException;import com.alibaba.fastjson.JSONObject; public class pc1 {/** * 讀取 * * @param rd * @return * @throws IOException */private static String readAll(Reader rd) throws IOException {StringBuilder sb = new StringBuilder();int cp;while ((cp = rd.read()) != -1) {sb.append((char) cp);}return sb.toString();}/** * 創(chuàng)建鏈接 * * @param url * @return * @throws IOException * @throws JSONException */private static JSONArray readJsonFromUrl(String url) throws IOException, JSONException {InputStream is = new URL(url).openStream();try {BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName('UTF-8')));String jsonText = readAll(rd);JSONArray json = JSONArray.parseArray(jsonText);return json;} finally {is.close();}} /** * 獲取城市信息 * * @param ip * @return * @throws JSONException * @throws IOException */public static void main(String[] args) throws JSONException, IOException {String ip = '122.189.200.141';JSONArray json = readJsonFromUrl('http://freeapi.ipip.net/'+ip);String a1 = (String)json.get(0);String a2 = (String)json.get(1);String a3 = (String)json.get(2);String a4 = (String)json.get(3);String a5 = (String)json.get(4);System.out.println(a1);System.out.println(a2);System.out.println(a3);System.out.println(a4);System.out.println(a5);}}

輸出結(jié)果

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