根据IP获取城市-Java调用“ip2region”地址库实例

根据IP获取城市-Java调用“ip2region”地址库实例-妈妈再也不用担心我的ip地址定位啦

ip2region

准确率99.9%的ip地址定位库，0.0x毫秒级查询，数据库文件大小只有1.5M，提供了java,php,c,python,nodejs,golang查询绑定和Binary,B树,内存三种查询算法

github地址：

下载v1.3版本：

解压目录如下图：

新建java项目，导入binding/java下的代码，并复制”data/ip2region.db”到“src目录

创建“IPUtil”.java ,内容参考”org.lionsoul.ip2region.test.TestSearcher.java“ maven仓库地址 <dependency> <groupId>org.lionsoul</groupId> <artifactId>ip2region</artifactId> <version>1.7.2</version> </dependency> gradle compile group: org.lionsoul, name: ip2region, version: 1.7.2

1. package com.xx;
2. import java.io.File;
3. import java.lang.reflect.Method;
4. import org.lionsoul.ip2region.DataBlock;
5. import org.lionsoul.ip2region.DbConfig;
6. import org.lionsoul.ip2region.DbSearcher;
7. import org.lionsoul.ip2region.Util;
8. public class IPUtil {
9. public static String getCityInfo(String ip){
10. //db
11. String dbPath = IPUtil.class.getResource("/ip2region.db").getPath();
12. File file = new File(dbPath);
13. if ( file.exists() == false ) {
14. System.out.println("Error: Invalid ip2region.db file");
15. }
16. //查询算法
17. int algorithm = DbSearcher.BTREE_ALGORITHM; //B-tree
18. //DbSearcher.BINARY_ALGORITHM //Binary
19. //DbSearcher.MEMORY_ALGORITYM //Memory
20. try {
21. DbConfig config = new DbConfig();
22. DbSearcher searcher = new DbSearcher(config, dbPath);
23. //define the method
24. Method method = null;
25. switch ( algorithm )
26. {
27. case DbSearcher.BTREE_ALGORITHM:
28. method = searcher.getClass().getMethod("btreeSearch", String.class);
29. break;
30. case DbSearcher.BINARY_ALGORITHM:
31. method = searcher.getClass().getMethod("binarySearch", String.class);
32. break;
33. case DbSearcher.MEMORY_ALGORITYM:
34. method = searcher.getClass().getMethod("memorySearch", String.class);
35. break;
36. }
37. DataBlock dataBlock = null;
38. if ( Util.isIpAddress(ip) == false ) {
39. System.out.println("Error: Invalid ip address");
40. }
41. dataBlock = (DataBlock) method.invoke(searcher, ip);
42. return dataBlock.getRegion();
43. } catch (Exception e) {
44. e.printStackTrace();
45. }
46. return null;
47. }
48. public static void main(String[] args) throws Exception{
49. System.err.println(getCityInfo("220.248.12.158"));
50. }
51. }

运行结果如下：