diff --git a/pom.xml b/pom.xml
index 6c87937..db65812 100644
--- a/pom.xml
+++ b/pom.xml
@@ -175,6 +175,12 @@
         </dependency>
 
 
+        <dependency>
+            <groupId>org.lionsoul</groupId>
+            <artifactId>ip2region</artifactId>
+            <version>1.7.2</version>
+        </dependency>
+
     </dependencies>
 
     <build>
diff --git a/src/main/java/cn/celess/blog/util/AddressUtil.java b/src/main/java/cn/celess/blog/util/AddressUtil.java
new file mode 100644
index 0000000..2168e8c
--- /dev/null
+++ b/src/main/java/cn/celess/blog/util/AddressUtil.java
@@ -0,0 +1,71 @@
+package cn.celess.blog.util;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.io.FileUtils;
+import org.lionsoul.ip2region.DataBlock;
+import org.lionsoul.ip2region.DbConfig;
+import org.lionsoul.ip2region.DbSearcher;
+import org.lionsoul.ip2region.Util;
+
+import java.io.File;
+import java.lang.reflect.Method;
+import java.util.Objects;
+
+/**
+ * @author : xiaohai
+ * @date : 2020/09/04 9:36
+ */
+
+@Slf4j
+public class AddressUtil {
+
+    public static String getCityInfo(String ip) {
+        File file;
+        try {
+            //db
+            String dbPath = AddressUtil.class.getResource("/ip2region/ip2region.db").getPath();
+            file = new File(dbPath);
+            if (!file.exists()) {
+                String tmpDir = System.getProperties().getProperty("java.io.tmpdir");
+                dbPath = tmpDir + "ip.db";
+                file = new File(dbPath);
+                FileUtils.copyInputStreamToFile(Objects.requireNonNull(AddressUtil.class.getClassLoader().getResourceAsStream("classpath:ip2region/ip2region.db")), file);
+            }
+            //查询算法
+            //B-tree
+            int algorithm = DbSearcher.BTREE_ALGORITHM;
+            try {
+                DbConfig config = new DbConfig();
+                DbSearcher searcher = new DbSearcher(config, dbPath);
+                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;
+                if (!Util.isIpAddress(ip)) {
+                    System.out.println("Error: Invalid ip address");
+                }
+
+                dataBlock = (DataBlock) method.invoke(searcher, ip);
+
+                return dataBlock.getRegion();
+
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return null;
+    }
+}
diff --git a/src/main/resources/ip2region/ip2region.db b/src/main/resources/ip2region/ip2region.db
new file mode 100644
index 0000000..d41b4a0
Binary files /dev/null and b/src/main/resources/ip2region/ip2region.db differ
diff --git a/src/test/java/cn/celess/blog/util/AddressUtilTest.java b/src/test/java/cn/celess/blog/util/AddressUtilTest.java
new file mode 100644
index 0000000..5c01440
--- /dev/null
+++ b/src/test/java/cn/celess/blog/util/AddressUtilTest.java
@@ -0,0 +1,15 @@
+package cn.celess.blog.util;
+
+import cn.celess.blog.BaseTest;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class AddressUtilTest extends BaseTest {
+
+    @Test
+    public void getCityInfo() {
+        assertEquals("0|0|0|内网IP|内网IP", AddressUtil.getCityInfo("127.0.0.1"));
+        assertEquals("中国|0|上海|上海市|阿里云", AddressUtil.getCityInfo("106.15.205.190"));
+    }
+}
\ No newline at end of file