使用mapDB持久化identity(50%)

pom.xml

@@ -76,6 +76,14 @@
     </dependency>
     <!-- https://mvnrepository.com/artifact/org.json/json -->
 
+    <!-- mapDB kv存储 -->
+    <!-- https://mvnrepository.com/artifact/org.mapdb/mapdb -->
+    <dependency>
+        <groupId>org.mapdb</groupId>
+        <artifactId>mapdb</artifactId>
+        <version>3.0.8</version>
+    </dependency>
+
 </dependencies>
 
 </project>