java - mybatis org.apache.ibatis.binding.BindingException : Invalid bound statement (not found) 问题

Question

我将 Spring MVC 与 Spring-Mybatis 一起使用，使用注释(@Insert、@Select 等)执行基本的 CRUD 操作，并得到以下异常

org.apache.ibatis.binding.BindingException:无效的绑定(bind)语句(未找到):

这是一个相关问题，mybatis spring mvc application, getting Invalid bound statement (not found)但这并没有解决我的问题，因为它使用 XML(UserMapper.xml) 映射来查询我使用带有注释的 java 接口(interface)(UserMapper.java)。

异常堆栈跟踪:

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.spring.mybatisdemo.mappers.UserMapper.selectNationality
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:948)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:801)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
    at org.eclipse.jetty.server.handler.ContextHandler.__doHandle(ContextHandler.java:1126)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1060)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
    at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113)
    at org.eclipse.jetty.server.Server.handle(Server.java:509)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:288)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:240)
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:539)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:620)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:540)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.spring.mybatisdemo.mappers.UserMapper.selectNationality
    at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:196)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:44)
    at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:59)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
    at com.sun.proxy.$Proxy41.selectNationality(Unknown Source)
    at com.spring.mybatisdemo.service.UserServiceImpl.selectNationalityById(UserServiceImpl.java:69)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.zeroturnaround.javarebel.fY.invoke(JRebel:1114)
    at java.lang.reflect.Method.invoke(Method.java)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    at com.sun.proxy.$Proxy43.selectNationalityById(Unknown Source)
    at com.spring.mybatisdemo.controller.UserController.getUsers(UserController.java:65)
    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.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)

springConfig.xml

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="typeAliasesPackage" value="com.spring.mybatisdemo.model"/>
  <property name="mapperLocations" value="classpath*:com/spring/mybatis/mappers/*.xml" />
</bean>

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
  <constructor-arg index="0" ref="sqlSessionFactory" />
</bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  <property name="basePackage" value="com.spring.mybatisdemo.mappers" />
</bean>

国籍 POJO类，

public class Nationality {  
  private Long nationalityId;
  private String name;

  //ignoring getters and setters
}

我正在为查询使用注解，下面是我来自 UserMapper.java 接口(interface)的相关代码，

@Select("SELECT nationalityId, name FROM nationality where nationalityId = #{nationalityId} ")
public Nationality selectNationality(Long nationalityId);

像这样调用上面的方法，

Nationality nationality = userService.selectNationalityById(new Long("1"));

在 UserServiceImpl.java 中，我注入(inject)了 UserMapper bean 并像这样使用它，

userMapper.selectNationality(nationalityId);

我用于选择 teamById 的相同查询工作正常，

userMapper.getTeamById(teamId)

和

@Select("SELECT teamId, name FROM TEAM WHERE teamId = #{teamId}")
public Team getTeamById(Long teamId);

以及控制台中对应的teamById查询，

[artifact:mvn] 2015-11-02 18:51:20 DEBUG SpringManagedTransaction:54 - JDBC Connection [com.mysql.jdbc.JDBC4Connection@1e846b60] will be managed by Spring
[artifact:mvn] 2015-11-02 18:51:20 DEBUG getTeamById:54 - ==>  Preparing: SELECT teamId, name FROM TEAM WHERE teamId = ? 
[artifact:mvn] 2015-11-02 18:51:20 DEBUG getTeamById:54 - ==> Parameters: 4(Long)
[artifact:mvn] 2015-11-02 18:51:20 DEBUG getTeamById:54 - <==      Total: 1

我不明白为什么只有 Nationality 有这个问题，而 Team 类的相同方法却可以正常工作。我获取国籍数据的代码可能有什么问题？

Answer 1

我曾经犯过类似的错误，结果是目录不正确。
如果 UserMapper 的命名空间是 com.mybatisdemo.mappers.UserMapper，确保 mapper-locations 是 src/resources/com/mybatisdemo/mappers/。
有时我们可能会创建一个名为com.mybatisdemo.mappers的目录，然后它的位置变成了错误的src/resources/com.mybatisdemo.mappers。