活不多說直接上代碼,需要引入ip2region.jar,可以直接去maven庫找。
package com.doitlite.cms.util;
import java.io.File;
import java.lang.reflect.Method;
import org.lionsoul.ip2region.DataBlock;
import org.lionsoul.ip2region.DbConfig;
import org.lionsoul.ip2region.DbSearcher;
import org.lionsoul.ip2region.Util;
public class AddressUtils {
public static String getCityInfo(String ip) {
//db
String dbPath = AddressUtils.class.getResource("/data/ip2region.db").getPath();
File file = new File(dbPath);
if (file.exists() == false) {
System.out.println("Error: Invalid ip2region.db file");
}
//查詢算法
int algorithm = DbSearcher.BTREE_ALGORITHM; //B-tree
//int algorithm = DbSearcher.BINARY_ALGORITHM; //Binary
//int algorithm = DbSearcher.MEMORY_ALGORITYM; //Memory
try {
DbConfig config = new DbConfig();
DbSearcher searcher = new DbSearcher(config, dbPath);
//define the method
Method method = null;
switch (algorithm) {
case DbSearcher.BTREE_ALGORITHM:
method = searcher.getClass().getMethod("btreeSearch", String.class);
break;
case DbSearcher.BINARY_ALGORITHM:
method = searcher.getClass().getMethod("binarySearch", String.class);
break;
case DbSearcher.MEMORY_ALGORITYM:
method = searcher.getClass().getMethod("memorySearch", String.class);
break;
}
DataBlock dataBlock = null;
if (Util.isIpAddress(ip) == false) {
System.out.println("Error: Invalid ip address");
}
dataBlock = (DataBlock) method.invoke(searcher, ip);
return dataBlock.getRegion();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) throws Exception {
String ip="12.24.100.20";
String cityIpString = getCityInfo(ip);
System.out.println(cityIpString); //中國|0|廣東省|深圳市|電信
String[] splitIpString = cityIpString.split("\\|");
cityIpString =splitIpString[3].replaceAll("市","");
System.err.println(cityIpString);
}
}
效果:
注意需要使用到一些資源文件:https://download.csdn.net/download/w491797259/12434715
目錄結構如下: