1、问题回顾
按照ip2region项目的官方集成到springboot项目后，运行测试一切都ok，没有任何问题。但是当项目打成可执行的jar包后再运行，却显示找不到ip2region.db，无法找到资源文件的错误。异常代码如下：
java.io.FileNotFoundException: class path resource [ip2region/ip2region.db] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/app.jar!/BOOT-INF/classes!/ip2region/ip2region.db
2、解决办法
将ip2region.db文件放到本地目录，然后直接读取本地文件进行ip解析，代码如下：
public static String getCityInfo(String ip) {
DbSearcher searcher = null;
try {
String dbPath = GlobalConfig.getProfile() + "ip2region/ip2region.db";
//String dbPath = "f:/profile/ip2region/ip2region.db"; //本地测试使用地址
File file = new File(dbPath);
if (file.exists()) {
DbConfig config = new DbConfig();
searcher = new DbSearcher(config, file.getPath());
Method method = searcher.getClass().getMethod("btreeSearch", String.class);
if (!Util.isIpAddress(ip)) {
log.error("Error: Invalid ip address");
}
DataBlock dataBlock = (DataBlock) method.invoke(searcher, ip);
return dataBlock.getRegion();
}
} catch (Exception e) {
log.error("获取地址信息异常：{}", e.getLocalizedMessage());
}
return "XX XX";
}