result code and connect DB static method

src/main/java/com/ic/er/common/ResultState.java

@@ -32,7 +32,7 @@ public class ResultState {
     }
 
     public ResultState(Object data) {
-        this.status = 200;
+        this.status = ResultStateCode.successfulOp;
         this.msg = "OK";
         this.data = data;
     }

src/main/java/com/ic/er/common/ResultStateCode.java

+package com.ic.er.common;
+
+public class ResultStateCode {
+    public static Integer successfulOp = 200;
+    public static Integer failOp = 400;
+}

src/main/java/com/ic/er/service/ViewService.java

@@ -12,7 +12,7 @@ public interface ViewService {
 
     List<ViewVO> queryAllView();
 
-    ViewVO queryViewById();
+    ViewVO queryView(ViewDTO view);
 
-    ResultState updateView(ViewDTO name);
+    ResultState updateView(ViewDTO view);
 }

src/main/java/com/ic/er/util/boot.java

+package com.ic.er.util;
+
+import com.ic.er.common.ResultState;
+import com.ic.er.common.ResultStateCode;
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class boot {
+    public static SqlSession sqlSession;
+
+    public static ResultState connectDB(){
+        ResultState resultState = null;
+        try {
+            InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
+            SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
+            SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(is);
+            sqlSession = sqlSessionFactory.openSession(true);
+            resultState = ResultState.ok();
+        } catch (IOException msg) {
+            resultState = ResultState.build(ResultStateCode.failOp, msg.getMessage());
+            return resultState;
+        }
+        return resultState;
+    }
+}

src/test/java/com/ic/er/testMybatis.java

@@ -25,7 +25,7 @@ public class testMybatis {
             InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
             SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
             SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(is);
-            SqlSession sqlSession = sqlSessionFactory.openSession();
+            SqlSession sqlSession = sqlSessionFactory.openSession(true);
             Connection connection = sqlSession.getConnection();
             System.out.println(connection);
         } catch (IOException e) {

target/classes/mapper/RelationshipMapper.xml

@@ -22,7 +22,7 @@
         id, name, view_id, first_entity_id, second_entity_id, first_attribute_id, second_attribute_id, cardinatily
     </sql>
 
-    <select id="selectById" parameterType="java.lang.Long" resultMap="BaseResultMap">
+    <select id="selectById" parameterType="java.lang.Long">
         select
         id,name,view_id,first_entity_id,second_entity_id,first_attribute_id,second_attribute_id,cardinality,is_delete,gmt_create,gmt_modefied
         from relationship