获取请求ip地址并根据ip解析地理位置

1.获取IP

public static String getIpAddr(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();  
        }  
        // 处理多IP的情况（只取第一个IP）
        if (ip != null && ip.contains(",")) {
            String[] ipArray = ip.split(",");
            ip = ipArray[0];
        }
        return ip;  
    }

2.注册高德

第一步，申请”web服务 API”密钥（Key）；
第二步，拼接HTTP请求URL，第一步申请的Key需作为必填参数一同发送；
第三步，接收HTTP请求返回的数据（JSON或XML格式），解析数据。
如无特殊声明，接口的输入参数和输出数据编码全部统一为UTF-8。
api地址：https://lbs.amap.com/api/webservice/guide/api/ipconfig/?sug_index=0

3.根据高德api接口文档请求并解析返回数据