Question

mybatis集成spring查不出数据

这是控制台信息

Creating a new SqlSession
SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@5c4eb823] was not

registered for synchronization because synchronization is not active
二月 08, 2017 7:09:28 下午 com.alibaba.druid.pool.DruidDataSource info
信息: {dataSource-1} inited
JDBC Connection [com.mysql.jdbc.JDBC4Connection@76f60564] will not be managed by Spring
==> Preparing: select *

WHERE username = ? and password = ?
==> Parameters: zhangsan(String), 123

(String)
<== Total: 0
Closing non transactional SqlSession
[org.apache.ibatis.session.defaults.DefaultSqlSession@5c4eb823]

为什么<== Total：0
我在mysql命令行直接查 select * from tb_user WHERE username = ‘zhangsan’ and password = '123'却有数据

Answer 1

最近在搭建maven + springmvc + spring + mybatis + MySQL 过程中遇到一个问题（tomcat启动的时候报异常
Java.lang.IllegalStateException: Could not load JDBC driver class [${jdbc_driverClassName}]）经过查询相关资料最后解决，解决如下：

开始我的application.xml中配置如下：
<!-- 引入jdbc配置文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath*:/jdbc.properties</value>
<!--要是有多个配置文件，只需在这里继续添加即可 -->
</list>
</property>
</bean>