diff --git a/pom.xml b/pom.xml
index 7666981..7dfa890 100644
--- a/pom.xml
+++ b/pom.xml
@@ -94,6 +94,15 @@
         <version>3.0.8</version>
     </dependency>
 
+    <!-- Sqlite Driver-->
+    <!-- https://mvnrepository.com/artifact/org.xerial/sqlite-jdbc -->
+    <dependency>
+        <groupId>org.xerial</groupId>
+        <artifactId>sqlite-jdbc</artifactId>
+        <version>3.28.0</version>
+    </dependency>
+
+
 </dependencies>
 
 </project>
\ No newline at end of file
diff --git a/src/main/java/minsecurity/identity/persist/sqlite/Sqlite.java b/src/main/java/minsecurity/identity/persist/sqlite/Sqlite.java
index dfa3206..bc2ffa4 100644
--- a/src/main/java/minsecurity/identity/persist/sqlite/Sqlite.java
+++ b/src/main/java/minsecurity/identity/persist/sqlite/Sqlite.java
@@ -1,5 +1,8 @@
 package minsecurity.identity.persist.sqlite;
 
+import java.io.File;
+import java.sql.*;
+
 /*
  * @Author: zhengqi wu
  * @Description: Sqlite封装
@@ -13,6 +16,20 @@ public class Sqlite {
 
     private String passwd = "2DD29CA851E7B56E4697B0E1F08507293D761A05CE4D1B628663F411A8086D99"; // 初始数据库密码
     private String db_file = "identity.db"; // 数据库文件名
+    private String db_path = "";
+    private String table_create = "CREATE TABLE IF NOT EXISTS \"identityinfo\" (\n" +
+            "\t\"name\"\tvarchar(255) NOT NULL,\n" +
+            "\t\"pubkey\"\tvarchar(255),\n" +
+            "\t\"prikey\"\tvarchar(255),\n" +
+            "\t\"pubkey_algo\"\tint,\n" +
+            "\t\"signature_algo\"int,\n" +
+            "\t\"pass\"\tvarchar(255),\n" +
+            "\t\"cert\"\tTEXT,\n" +
+            "\t\"is_default\"\tint DEFAULT 0,\n" +
+            "\t\"prikey_raw_byte\" varchar(255),\n" +
+            "\tPRIMARY KEY(\"name\")\n" +
+            ");";
+
     private Sqlite(){
 
     }
@@ -37,18 +54,65 @@ public class Sqlite {
         passwd = pass;
     }
 
-    public void open(String filePath){
+    /**
+     * 进行数据库文件的连接测试，如果表不存在则新建
+     * 数据库文件默认写入地址为~/.min/identity/identity.db
+     * @throws Exception
+     */
+    public void openDefault() throws Exception {
+        Connection c = null;
+        Statement stmt = null;
+        try{
+            String homePath = SqliteUtil.home();
+            homePath += "/min/identity";
+            String dbPath = homePath;
+            if (!SqliteUtil.pathExists(dbPath)){
+                new File(dbPath).mkdirs();
+            }
+            String real_db_file = dbPath + db_file;
+            c = DriverManager.getConnection("jdbc:sqlite:" + real_db_file);
+            stmt = c.createStatement();
+            stmt.executeUpdate(table_create);
+            stmt.close();
+            c.close();
+        }catch (Exception ex){
+            if (c != null)
+                c.close();
+            throw ex;
+        }
+    }
+    //自定义文件地址,注意要用/结尾,比如:/min/identity/
+    public void open(String filePath) throws Exception {
+        Connection c = null;
+        Statement stmt = null;
         try{
             boolean db_exists = SqliteUtil.pathExists(filePath);
             if (!db_exists){
-
+                new File(filePath).mkdirs();
             }
             String real_db_file = filePath + db_file;
-
+            c = DriverManager.getConnection("jdbc:sqlite:" + real_db_file);
+            stmt = c.createStatement();
+            stmt.executeUpdate(table_create);
+            stmt.close();
+            c.close();
         }catch (Exception ex){
-            // TODO 出错时关闭数据库
+            // DONE 出错时关闭数据库
+            if (c != null)
+                c.close();
+            throw ex;
         }
     }
 
-
+    public Connection getConn() throws SQLException {
+        Connection c = null;
+        try{
+            String real_db_file = db_path + db_file;
+            c = DriverManager.getConnection("jdbc:sqlite:" + real_db_file);
+            // TODO 设置数据库最大连接数
+            return c;
+        }catch (Exception ex){
+            throw ex;
+        }
+    }
 }