nvalid bound statement (not found)解决方法

错误描述，smm项目出现：

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): org.seckill.dao.SeckillDao.queryById
at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)
at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)
at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)
at com.sun.proxy.$Proxy15.queryById(Unknown Source)
at org.test.Test1.queryById1(Test1.java:21)
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: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:232)
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
4000
(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:175)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

这样的错误你先仔细检查namespace里的路径是否正确，我这里产生这样报错的原因是因为在配置文件中写的mapping路径是

<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:*Dao.xml"></property>

改成

<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath*:*Dao.xml"></property>

就可以运行了，至于classpath:和classepath*:的区别简单说就是

classpath：只会到你的class路径中查找找文件;

classpath*：不仅包含class路径，还包括jar文件中(class路径)进行查找。

为了运行速度还是少尽量使用classpath*。

比如我在这里再建立一个文件夹叫mapper放置将映射文件放进去，再将路径改为

<property name="mapperLocations" value="classpath:/mapper/*Dao.xml"></property>

这样也是可以运行的。

想要具体了解区别原因的请看我转载的这篇博客。