java如何根据IP获取当前区域天气信息详解

/**

  * @Description：获取客户端外网ip 此方法要接入互联网才行，内网不行

  **/

public static String getPublicIp() {

     try {

         String path = "http://HdhCmsTestnet.cn/static/customercare/yourip.asp" ;// 要获得html页面内容的地址(万网)

         URL url = new URL(path); // 创建url对象

         HttpURLConnection conn = (HttpURLConnection) url.openConnection(); // 打开连接

         conn.setRequestProperty( "contentType" , "GBK" ); // 设置url中文参数编码

         conn.setConnectTimeout( 5 * 1000 ); // 请求的时间

         conn.setRequestMethod( "GET" ); // 请求方式

         InputStream inStream = conn.getInputStream();

         // readLesoSysXML(inStream);

         BufferedReader in = new BufferedReader( new InputStreamReader(

                 inStream, "GBK" ));

         StringBuilder buffer = new StringBuilder();

         String line;

         // 读取获取到内容的最后一行,写入

         while ((line = in.readLine()) != null ) {

             buffer.append(line);

         }

         List<String> ips = new ArrayList<>();

         //用正则表达式提取String字符串中的IP地址

         String regEx= "((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)" ;

         String str = buffer.toString();

         Pattern p = Pattern测试数据pile(regEx);

         Matcher m = p.matcher(str);

         while (m.find()) {

             String result = m.group();

             ips.add(result);

         }

         // 返回公网IP值

         return ips.get( 0 );

     } catch (Exception e) {

         System.out.println( "获取公网IP连接超时" );

         return "" ;

     }

}

<!--ip2region-->

<dependency>

     <groupId>org.lionsoul</groupId>

     <artifactId>ip2region</artifactId>

     <version> 1.7 . 2 </version>

</dependency>

@Log4j2

public class IPUtils {

     /**

      * 根据IP获取地址

      *

      * @return 国家|区域|省份|城市|ISP

      */

     public static String getAddress(String ip) {

         return getAddress(ip, DbSearcher.BTREE_ALGORITHM);

     }

     /**

      * 根据IP获取地址

      *

      * @param ip

      * @param algorithm 查询算法

      * @return 国家|区域|省份|城市|ISP

      * @see DbSearcher

      * DbSearcher.BTREE_ALGORITHM; //B-tree

      * DbSearcher.BINARY_ALGORITHM //Binary

      * DbSearcher.MEMORY_ALGORITYM //Memory

      */

     @SneakyThrows

     public static String getAddress(String ip, int algorithm) {

         if (!Util.isIpAddress(ip)) {

             log.error( "错误格式的ip地址: {}" , ip);

             return "" ;

         }

         String dbPath = IPUtils. class .getResource( "/db/ip2region.db" ).getPath();

         File file = new File(dbPath);

         if (!file.exists()) {

             log.error( "地址库文件不存在" );

             return "" ;

         }

         DbSearcher searcher = new DbSearcher( new DbConfig(), dbPath);

         DataBlock dataBlock;

         switch (algorithm) {

             case DbSearcher.BTREE_ALGORITHM:

                 dataBlock = searcher.btreeSearch(ip);

                 break ;

             case DbSearcher.BINARY_ALGORITHM:

                 dataBlock = searcher.binarySearch(ip);

                 break ;

             case DbSearcher.MEMORY_ALGORITYM:

                 dataBlock = searcher.memorySearch(ip);

                 break ;

             default :

                 log.error( "未传入正确的查询算法" );

                 return "" ;

         }

         searcher.close();

         return dataBlock.getRegion();

     }

@GetMapping ( "/weather" )

@DecryptBody (encode = true ) //响应加密

public Result getWeather(){

     String publicIp = GetIPUtils.getPublicIp(); //获取外网IP

     if (StringUtils.isBlank(publicIp)) return ResultUtils.error( "获取失败" );

     String cityInfo = IPUtils.getAddress(publicIp); //国家|区域|省份|城市|ISP

     if (StringUtils.isBlank(cityInfo)) return ResultUtils.error( "获取失败" );

     String[] split = cityInfo.split( "\|" );

     String city = "" ;

     for (String aSplit : split) if (aSplit.contains( "市" )) city = aSplit; //拿取市级名称

     if (StringUtils.isBlank(city)) return ResultUtils.error( "获取失败" );

     String weatherInformation = HttpUtil.get( "http://portalweather测试数据sys.net.cn/weather03/api/weatherService/getDailyWeather?cityName=" + city);//调用天气接口

     if (StringUtils.isBlank(weatherInformation)) return ResultUtils.error( "获取失败" );

     Object o = ObjectMapperUtils.strToObj(weatherInformation,Object. class );

     return ResultUtils.success( "获取成功" ,o);

}