mybatis 配置 mapper 路径
错误一：启动时找不到注入的 dao 类
The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true) Action:
原因：需要增加 MapperScan 配置
@MapperScan("com.xx.xx.dao")
其实项目中原先没有这个配置，但是以前的不知道为什么自动就扫描到了，查了半天也没查明白默认值是扫描哪里
错误二：调用 dao 的方法时找不到对应的 sql
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.fangzhou.timesmilk.dao.baseOrderDao.getLastPlan at org.apache.ibatis.binding.MapperMethod$SqlCommand.(MapperMethod.java:235) at org.apache.ibatis.binding.MapperMethod. (MapperMethod.java:53) at org.apache.ibatis.binding.MapperProxy.lambda$cachedInvoker$0(MapperProxy.java:115) at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) at org.apache.ibatis.binding.MapperProxy.cachedInvoker(MapperProxy.java:102) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85) at com.sun.proxy.$Proxy169.getLastPlan(Unknown Source) at com.fangzhou.timesmilk.portal.NoticeTest.testbase(NoticeTest.java:81) 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.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74) at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) 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)
原因，mybatis 中，mapper 对应的默认 xml 配置文件会在同一路径下查找，（一个放在 java，一个放在 resouce 下也是一样的），这里的统一路径时值打包后放在了同个包下，如果mapper 跟 xml 不是同一路径，就需要配置
mapper-locations
mybatis:
mapper-locations:
- classpath:daomapper/*.xml
