这个哪里错了

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>com.imooc</groupId>
   <artifactId>emp</artifactId>
   <version>1.0-SNAPSHOT</version>
   <dependencies>
       <dependency>
           <groupId>org.mybatis</groupId>
           <artifactId>mybatis</artifactId>
           <version>3.5.4</version>
       </dependency>
       <dependency>
           <groupId>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
           <version>5.1.49</version>
       </dependency>
       <dependency>
           <groupId>junit</groupId>
           <artifactId>junit</artifactId>
           <version>4.13</version>
       </dependency>
   </dependencies>

</project>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
       PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
       "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
   <environments default="emp">
       <environment id="emp">
           <transactionManager type="JDBC"></transactionManager>
           <dataSource type="POOLED">
               <property name="driver" value="com.mysql.jdbc.Driver"/>
               <property name="url" value="jdbc:mysql://localhost:3306/babytun?useUnicode=true&amp;characterEncoding=UTF-8"/>
               <property name="usename" value="root"/>
               <property name="password" value="root"/>
           </dataSource>
       </environment>
   </environments>
</configuration>

package com.imooc.mybatis.utils;

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.Reader;


public class MyBatisUtils {
   private static SqlSessionFactory sqlSessionFactory = null;

   static{
       Reader reader = null;
       try {
           reader = Resources.getResourceAsReader("mybatis-config.xml");
           sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
       } catch (IOException e) {
           e.printStackTrace();
           throw new ExceptionInInitializerError(e);
       }

   }
   public static SqlSession openSession(){
       return sqlSessionFactory.openSession();
   }
   public static void closeSession(SqlSession session){
       if(session != null)
           session.close();
   }
}

import com.imooc.mybatis.utils.MyBatisUtils;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;

import java.sql.Connection;

public class MyBatisTestor {
   @Test
   public void testMyBatisUtils() throws Exception {
       SqlSession sqlSession = null;
       try {
           sqlSession = MyBatisUtils.openSession();

           Connection conn = sqlSession.getConnection();
           System.out.println(conn);
       }catch(Exception e){
           throw e;
       }finally {
           MyBatisUtils.closeSession(sqlSession);
       }

   }

}

java.lang.NoClassDefFoundError: Could not initialize class com.imooc.mybatis.utils.MyBatisUtils

at MyBatisTestor.testMyBatisUtils(MyBatisTestor.java:19)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)

at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)

at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)

at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)

at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)

at org.junit.runners.ParentRunner.run(ParentRunner.java:413)

at org.junit.runner.JUnitCore.run(JUnitCore.java:137)

at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)

at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)

at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)

at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

Process finished with exit code -1