解決找不到mapper.xml檔案的問題

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先看問題長啥樣吧！下面是通過逆向工程產生的Mapper.xml檔案，包路徑什麼的都沒有錯！

但是每次調用Mapper中的方法的操作資料庫的時候都失敗：

 

 貼出來詳細的報錯資訊：

 1 三月 19, 2017 10:16:45 下午 org.apache.catalina.core.ApplicationContext log 2 資訊: No Spring WebApplicationInitializer types detected on classpath 3 三月 19, 2017 10:16:45 下午 org.apache.catalina.core.ApplicationContext log 4 資訊: Initializing Spring root WebApplicationContext 5 三月 19, 2017 10:16:48 下午 org.apache.catalina.core.ApplicationContext log 6 資訊: Initializing Spring FrameworkServlet ‘xuebusi-manager‘ 7 三月 19, 2017 10:20:40 下午 org.apache.catalina.core.StandardWrapperValve invoke 8 嚴重: Servlet.service() for servlet [xuebusi-manager] in context with path [] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.xuebusi.mapper.TbUserMapper.selectByExample] with root cause 9 org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.xuebusi.mapper.TbUserMapper.selectByExample10     at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)11     at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)12     at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)13     at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)14     at com.sun.proxy.$Proxy19.selectByExample(Unknown Source)15     at com.xuebusi.service.impl.UserServiceImpl.getUserById(UserServiceImpl.java:66)16     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)17     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)18     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)19     at java.lang.reflect.Method.invoke(Method.java:606)20     at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)21     at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)22     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)23     at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)24     at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:267)25     at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)26     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)27     at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)28     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)29     at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)30     at com.sun.proxy.$Proxy20.getUserById(Unknown Source)31     at com.xuebusi.controller.TestController.getUserById(TestController.java:50)32     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)33     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)34     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)35     at java.lang.reflect.Method.invoke(Method.java:606)36     at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)37     at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)38     at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)39     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)40     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)41     at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)42     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)43     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)44     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)45     at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)46     at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)47     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)48     at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)49     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)50     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)51     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)52     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)53     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)54     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)55     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)56     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)57     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)58     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)59     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)60     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)61     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)62     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)63     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)64     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)65     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)66     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)67     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)68     at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)69     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)70     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)71     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)72     at java.lang.Thread.run(Thread.java:745)

 

 

 折騰了兩天，偶爾在網上見網友如下解決方案，才算是解決了（想大哭一場）：

原因是：maven預設會把src/main/resources下的所有設定檔以及src/main/java下的所有java檔案打包或發布到target\classes下面，但是現實我們可能會在src/main/java下面也放置一些設定檔如hibernate設定檔或mybatis mapper設定檔等，如果不做一些額外配置，那我們打包後的項目可能找不到這些必須的資源檔，因此在pom.xml中增加類似如下配置，這樣就會將src/main/java下的xml檔案隨同java編譯後的class檔案一同copy到相應的class目錄。

 1     <build> 2         <resources> 3             <resource> 4                 <directory>src/main/java</directory> 5                 <includes> 6                     <include>**/mapper/*Mapper.xml</include> 7                 </includes> 8             </resource> 9         </resources>10     </build>

解決找不到mapper.xml檔案的問題