JAVA配置 ip2region IP库 IP地址查询

1、添加依赖

<dependency>
    <groupId>org.lionsoul</groupId>
    <artifactId>ip2region</artifactId>
    <version>1.7</version>
</dependency>

2、工具类

public class IPUtil {

    public static String getCityInfo(String ip){
        //db
        String dbPath = IPUtil.class.getResource("/ip2region.db").getPath();
        File file = new File(dbPath);
        if ( file.exists() == false ) {
            System.out.println("Error: Invalid ip2region.db file");
        }
        //查询算法
        int algorithm = DbSearcher.BTREE_ALGORITHM; //B-tree
        //DbSearcher.BINARY_ALGORITHM //Binary
        //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;
    }
}

3、下载文件ip2region.db到resources文件夹下

    $ git clone https://gitee.com/lionsoul/ip2region.git

    下载这个项目之后到data/文件夹下面找到ip2region.db复制到项目resources下