关于IDEA工具在SpringMVC整合mybatis中出现的I

转：http://blog.csdn.net/v19freedom/article/details/69855302
转：http://blog.csdn.net/miaoy220/article/details/53447277
转：http://blog.csdn.net/yehanwei163/article/details/77165130
转：http://blog.csdn.net/shifangwannian/article/details/48882201

搭建一个SSM框架，项目结构如下：

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然后部署并启动项目后，总是报一个错误：org.apache.ibatis.binding.BindingException: Invalid bound statement (not found)

  
    09-Apr-2017 17:42:20.864 严重 [http-nio-8080-exec-4] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.runtu.dao.UserMapper.selectUserById] with root cause  
     org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.runtu.dao.UserMapper.selectUserById  
        at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)  
        at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)  
        at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)  
        at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)  
        at com.sun.proxy.$Proxy17.selectUserById(Unknown Source)  
        at com.runtu.service.UserService.selectUserById(UserService.java:17)  
        at com.runtu.controller.UserController.getIndex(UserController.java:23)  
        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.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:178)  
        at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:444)  
        at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:432)  
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)  
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)  
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968)  
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:859)  
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)  
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844)  
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)  
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)  
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)  
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)  
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)  
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)  
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)  
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)  
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)  
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)  
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)  
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)  
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)  
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)  
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)  
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)  
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)  
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)  
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495)  
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)  
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:767)  
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1347)  
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)  
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)  
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)  
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)  
        at java.lang.Thread.run(Thread.java:745)  
  

这个问题很常见一般的原因是Mapper interface和xml文件的定义对应不上，但是我检查了包名，namespace，方法名称，还要spring的配置，都没有问题。最后发现编译后的目录没有mapper的xml，所以这边断定xml没有编译进去。

图片.png

后来上网搜了下，别人给出的答复

    idea在build工程的时候 遇到maven项目 使用的是pom文件里面配置的<build></build>里面的东西  
    而这里面如果不做特别配置 是maven默认的 编译的时候 只搬运src/main/java里面的java文件到target/classes,其他文件会被忽略  
    解决办法就是向maven-resources-plugin插件增加配置   
    http://bbs.csdn.net/topics/391841282?page=1#post-402070612 这个里面有配置的全文  
    这样配置之后 idea在build的时候 或者执行 maven test 的时候 才能把源码文件夹里的xml文件与java文件一起搬到target/classes 里面去   
    别人如果导入你的这个maven工程 也不用设置idea了  
      
    另外 为什么在eclipse里面 即使pom不做这个特别配置 也没问题 原因是eclipse在build工程的时候 不依赖 maven的pom文件 用的eclipse的编译机制 不会忽略源码文件夹里面的xml文件  

下面有两种常用的方法可任选一种。
方法1，利用maven-resources-plugin插件

    <plugin>  
        <artifactId>maven-resources-plugin</artifactId>  
        <version>2.6</version>  
        <executions>  
            <execution>  
                <id>copy-xmls</id>  
                <phase>process-resources</phase>  
                <goals>  
                    <goal>copy-resources</goal>  
                </goals>  
                <configuration>  
                    <outputDirectory>${basedir}/target/classes</outputDirectory>  
                    <resources>  
                        <resource>  
                            <directory>${basedir}/src/main/java</directory>  
                            <includes>  
                                <include>**/*.xml</include>  
                            </includes>  
                        </resource>  
                    </resources>  
                </configuration>  
            </execution>  
        </executions>  
    </plugin>  

方法2，其中*/这样的写法，是为了保证各级子目录下的资源文件被打包。

    <build>  
    <finalName>test</finalName>  
    <!-- 
    这样也可以把所有的xml文件，打包到相应位置。-->  
    <resources>  
        <resource>  
            <directory>src/main/resources</directory>  
            <includes>  
                <include>**/*.properties</include>  
                <include>**/*.xml</include>  
                <include>**/*.tld</include>  
            </includes>  
            <filtering>false</filtering>  
        </resource>  
        <resource>  
            <directory>src/main/java</directory>  
            <includes>  
                <include>**/*.properties</include>  
                <include>**/*.xml</include>  
                <include>**/*.tld</include>  
            </includes>  
            <filtering>false</filtering>  
        </resource>  
    </resources>  
</build>   

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