服务端调用高德地图api实现ip定位城市详解程序员

package com.test.utils.gaode; 
 
import com.alibaba.fastjson.JSONException; 
import com.alibaba.fastjson.JSONObject; 
import com.test.commons.FailException; 
 
import java.io.*; 
import java.net.URL; 
import java.nio.charset.Charset; 
 
public class GdUtil { 
 
    private static final String KEY = "17abf77d3c69e0d16c02e764f4fe6be4";       //web服务的key 
 
    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(); 
    } 
 
    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(); 
        } 
    } 
 
    public static String getCityCodeByIp(String ipAddress) { 
        JSONObject json = null; 
        String adCode = ""; 
        try { 
            json = readJsonFromUrl("http://restapi.amap.com/v3/ip?ip=" + ipAddress + "&key=" + KEY + ""); 
            if ("0".equals(json.getString("status"))){      //调用异常时，抛出返回信息，以便分析（我会在错误层统一捕获并输出到error日志） 
                throw new FailException("调用高德返回异常: " + json.toJSONString()); 
            } 
        } catch (IOException e) { 
            e.printStackTrace(); 
            throw new FailException("高德获取城市编码：", e); 
        } 
        adCode = json.getString("adcode");          //获取ip定位的城市编码（高德返回json如下，需要其他也可自行获取） 
        return adCode; 
    } 
 
    public static void main(String[] args) { 
        String s = GdUtil.getCityCodeByIp("60.191.12.10"); 
        System.out.println(s);                             //330100 
 
    } 
}

package com.test.utils;

import javax.servlet.http.HttpServletRequest;

/**
 * 请求对象 工具类
 */
public class RequestUtils {

　　/** 
     * 获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址; 
     * 
     * @param request 
     * @return 
     * @throws 
     */ 
    public final static String getIpAddress(HttpServletRequest request) { 
        // 获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址 
        String ip = request.getHeader("X-Forwarded-For"); 
 
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
            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(); 
            } 
        } else if (ip.length() > 15) { 
            String[] ips = ip.split(","); 
            for (String ip1 : ips) { 
                String strIp = (String) ip1; 
                if (!("unknown".equalsIgnoreCase(strIp))) { 
                    ip = strIp; 
                    break; 
                } 
            } 
        } 
        return ip; 
    }
}

package com.test.web.common;

import com.alibaba.fastjson.JSONObject;
import com.test.utils.RequestUtils;
import com.test.utils.gaode.GdUtil;
import org.apache.log4j.Logger;

import javax.servlet.http.HttpServletRequest;

/**
 */
@RestController
@RequestMapping(value = "/api/core")
public class TestController {
　　private Logger log = Logger.getLogger(this.getClass());

[email protected](value = "/test", method = RequestMethod.POST) 
    public JsonResp test(@RequestBody JSONObject reqJson, HttpServletRequest request) {
　　　　　log.debug("测试获取访问者的城市编码") 
        JSONObject resJson = new JSONObject(); 
 
        String ip = RequestUtils.getIpAddress(request); 
        String adCode = GdUtil.getCityCodeByIp(ip); 
        resJson.put("cityCode", adCode); 
 
        return JsonResp.ok(resJson); 
    }
}