IP地址工具类IpUtil

import com.huluwa.cc.ipconfig.DataBlock;
import com.huluwa.cc.ipconfig.DbConfig;
import com.huluwa.cc.ipconfig.DbSearcher;
import com.huluwa.cc.ipconfig.Util;
import org.apache.commons.io.FileUtils;

import javax.servlet.http.HttpServletRequest;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Objects;

public class IpUtil {

_/**_<br />_     * 获取合法ip地址_<br />_     * _**_@param _**_request_<br />_     * _**_@return_**<br />**_     _**_*/_<br />_    _public static String getRealIpAddress(HttpServletRequest request) {<br />        String ip = request.getHeader("x-forwarded-for");<br />        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {<br />            ip = request.getHeader("Proxy-Client-IP");<br />        }<br />        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {<br />            ip = request.getHeader("WL-Proxy-Client-IP");<br />        }<br />        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {<br />            ip = request.getRemoteAddr();<br />            if(ip.equals("127.0.0.1")){<br />                //根据网卡取本机配置的IP<br />                InetAddress inet=null;<br />                try {<br />                    inet = InetAddress._getLocalHost_();<br />                } catch (UnknownHostException e) {<br />                    e.printStackTrace();<br />                }<br />                ip= inet.getHostAddress();<br />            }<br />        }<br />        // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割<br />        if(ip != null && ip.length() > 15){<br />            if(ip.indexOf(",")>0){<br />                ip = ip.substring(0,ip.indexOf(","));<br />            }<br />        }<br />        return ip;<br />    }
public static String getCityInfo(String ip){
    String dbPath = IpUtil.class.getResource("/ip2region/ip2region.db").getPath();<br />        File file = new File(dbPath);<br />        if (!file.exists()) {<br />            String tmpDir = System._getProperties_().getProperty("java.io.tmpdir");<br />            dbPath = tmpDir + "ip.db";<br />            file = new File(dbPath);<br />            try {<br />                FileUtils._copyInputStreamToFile_(Objects._requireNonNull_(IpUtil.class.getClassLoader().getResourceAsStream("classpath:ip2region/ip2region.db")), file);<br />            } catch (IOException e) {<br />                e.printStackTrace();<br />            }<br />        }
    //查询算法<br />        int algorithm = DbSearcher._BTREE_ALGORITHM_; //B-tree<br />        //DbSearcher.BINARY_ALGORITHM //Binary<br />        //DbSearcher.MEMORY_ALGORITYM //Memory<br />        try {<br />            DbConfig config = new DbConfig();<br />            DbSearcher searcher = new DbSearcher(config, dbPath);
        //define the method<br />            Method method = null;<br />            switch ( algorithm )<br />            {<br />                case DbSearcher._BTREE_ALGORITHM_:<br />                    method = searcher.getClass().getMethod("btreeSearch", String.class);<br />                    break;<br />                case DbSearcher._BINARY_ALGORITHM_:<br />                    method = searcher.getClass().getMethod("binarySearch", String.class);<br />                    break;<br />                case DbSearcher._MEMORY_ALGORITYM_:<br />                    method = searcher.getClass().getMethod("memorySearch", String.class);<br />                    break;<br />            }
        DataBlock dataBlock = null;<br />            if ( Util._isIpAddress_(ip) == false ) {<br />                System._out_.println("Error: Invalid ip address");<br />            }
        dataBlock  = (DataBlock) method.invoke(searcher, ip);
        return dataBlock.getRegion();
    } catch (Exception e) {<br />            e.printStackTrace();<br />        }
    return null;<br />    }
public static void main(String[] args)  throws Exception{<br />        System._err_.println(_getCityInfo_("171.11.100.5"));<br />    }

}