如图:当我访问控制器,控制器调用mybatis的dao层时一直在建立连接

下面是从数据库查询出已经建立的连接 ,居然有20002个

• 这是调用的方法
  

• 这是dao层 mybatis相关 ,只有两个简单的方法
  

• 这是数据库连接信息
  

• 这是我的applicationContext.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!--配置mybatis-->
    <context:component-scan base-package="shiro.dao"/>
    <context:component-scan base-package="shiro.service"/>

<!--    加载数据库信息-->
<context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

<!--配置数据源信息-->
    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <property name="password" value="${jdbc.password}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
    </bean>

<!--    配置mybatis-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>

<!--    配置mybatis扫描-->
 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" id="configurer">
<!--     只扫描dao层-->
     <property name="basePackage" value="shiro.dao"/>
 </bean>





</beans>

• 这是部分错误 控制台一致在闪烁,估计有2000多这样的错误
  com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections"
  at sun.reflect.GeneratedConstructorAccessor28.newInstance(Unknown Source)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
  at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
  at com.mysql.jdbc.Util.getInstance(Util.java:381)
  at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
  at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
  at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1095)
  at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031)
  at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
  at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
  at sun.reflect.GeneratedConstructorAccessor24.newInstance(Unknown Source)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
  at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
  at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
  at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
  at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1375)
  at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1431)
  at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1844)