mybatis一个怪异的问题:
Invalid bound statement (not found): cn.com.dao.UserDao.selectByUser at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:178) at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:38) at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:49) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:42) at $Proxy22.selectByUser(Unknown Source)
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for cn.com.dao.UserDao.selectByUser
at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:775) at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:615) at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:608) at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:176)
... 34 more
1. 我检查了半天也没看出什么问题来，后来把mapper的xml select 语句重写。问题竟然好了。出了这种问题：
<mapper namespace="cn.com.dao.UserDao">
mapper的namespace写的不对！
<insert id="insert" parameterType="com.test.pojo.User" >
parameterType没有写对。
2. UserDao的方法在UserDao.xml中没有，然后执行UserDao的方法会报此错
3. 删除配置文件里中文的注释,保存.
4. Mybatis的自动扫描 错误
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/test/mapping/*.xml"></property>
</bean>
value="classpath:com/test/mapping/*.xml"没有写对
<!-- DAO接口所在包名，Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.test.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<property name="basePackage" value="com.test.dao" /> 没有写对
