maven项目编译漏掉src/main/java下的xml配置文件

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在整合Spring + Mybatis框架的时候，自动扫描配置都已经配置好了。
配置如下：

<?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:p="http://www.springframework.org/schema/p"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xsi:schemaLocation="http://www.springframework.org/schema/beans                          http://www.springframework.org/schema/beans/spring-beans-3.1.xsd                          http://www.springframework.org/schema/context                          http://www.springframework.org/schema/context/spring-context-3.1.xsd                          http://www.springframework.org/schema/mvc                          http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">    <!-- 自动扫描 -->    <context:component-scan base-package="com.aheizi" />    <!-- 引入配置文件 -->    <bean id="propertyConfigurer"        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="location" value="classpath:properties/jdbc.properties" />    </bean>     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"        destroy-method="close">        <property name="driverClassName" value="${driver}" />        <property name="url" value="${url}" />        <property name="username" value="${username}" />        <property name="password" value="${password}" />        <!-- 初始化连接大小 -->        <property name="initialSize" value="${initialSize}"></property>        <!-- 连接池最大数量 -->        <property name="maxActive" value="${maxActive}"></property>        <!-- 连接池最大空闲 -->        <property name="maxIdle" value="${maxIdle}"></property>        <!-- 连接池最小空闲 -->        <property name="minIdle" value="${minIdle}"></property>        <!-- 获取连接最大等待时间 -->        <property name="maxWait" value="${maxWait}"></property>    </bean>     <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->    <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/aheizi/mapping/*.xml"></property>        <property name="typeAliasesPackage" value="com.aheizi.domain" />    </bean>    <!-- 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.aheizi.dao" />        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>    </bean>    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->    <bean id="transactionManager"        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource" />    </bean></beans>

但是在install的时候报了如下错误：

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.aheizi.dao.UserMapper.selectByUserId    at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:184)    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:38)    at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:49)    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:42)    at com.sun.proxy.$Proxy11.selectByUserId(Unknown Source)    at com.aheizi.service.impl.UserServiceImpl.getUserById(UserServiceImpl.java:20)    at com.aheizi.testmybatis.TestSpringDemo.test1(TestSpringDemo.java:37)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:601)    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)    at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:601)    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)    at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)

显示绑定错误，分析可知应该是在UserMapper接口和SQL的隐射文件没有结合。
第一时间检查了mapper的namespace属性，确认没有错。
后来查看了target/classes/../mapping并不存在，也就是说mapper.xml文件并没有在编译的时候放进classes中。
那么接口当然绑定不了selectByUserId这个方法。
查资料得知，有两个解决办法：
1.在pom.xml中添加如下代码：

2.将mapper.xml映射文件放到resources文件夹下。
文件目录如下：

运行就不会报错了，但是我看着还是有点别扭，就是看着不爽，等以后想到好办法之后再换吧。

我就纳了个闷了，maven这样限制xml文件的位置，即没让我觉得美观，也没有感到实用。

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