整合spring+mybatis 報錯以下錯誤：

我完全是IDEA的問題！！！找了半天啊！！！

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.wechat.module.personal.dao.UserMapper.selectAllUser

    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 com.sun.proxy.$Proxy28.selectAllUser(Unknown Source)
    at com.wechat.module
 
.personal.service.impl.UserServiceImpl.getAllUsers(UserServiceImpl.java:47)
    at com.wechat.module.personal.service.impl.UserServiceImpl$$FastClassBySpringCGLIB$$6bb9a41c.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework
 
.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)
    at com.wechat.module.personal.service.impl.UserServiceImpl$$EnhancerBySpringCGLIB$$5ad12f2.getAllUsers(<generated>)
    at DBTest.testBuildDB(DBTest.java:32)
    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:606)
    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: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:271)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
    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$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
    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:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.wechat.module.personal.dao.UserMapper.selectAllUser
    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)
    ... 49 more

重點是：
- org.apache.ibatis.binding.BindingException: Invalid bound statement (not found):
- Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for
這兩句報錯資訊，查了很久許多部落格論壇都說是mapper.xml裡的namespace報錯 或者是方法名報錯，但是看了一下午確認了並沒有任何對應錯誤。
而且同一個專案在eclipse跑不報錯。
所以開始懷疑並沒有掃描到包裡的XML檔案。

http://blog.csdn.net/XiWenRen/article/details/49101605
這個部落格給了我提醒 提到了IDEA的掃描機制，如果在java／main 中的xml檔案會被忽略 。於是可以看到 target資料夾中，並沒有xml存在。
嘗試了博主說的把xml直接拖到resourse，執行！

成功了！！！

但是這個方法 ，其實破壞了包結構。

嘗試新的方法：不需要移動mapper.xml,推薦在pom檔案中找到

<build></build>

在其中新增以下幾行，用於掃描到xml檔案。

<resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
</resources>

-再次執行！可以成功！