SpringMVC项目显示某个参数找不到

﹏ヽ暗。殇╰゛Y 2023-08-17 17:28 131阅读 0赞

报错信息

01-Oct-2019 14:20:13.786 严重 [http-apr-8080-exec-3] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcherServlet] in context with path [/tour_war_exploded] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'start' not found. Available parameters are [arg1, arg0, param1, param2]] with root cause
     org.apache.ibatis.binding.BindingException: Parameter 'start' not found. Available parameters are [arg1, arg0, param1, param2]
    	at org.apache.ibatis.binding.MapperMethod$ParamMap.get(MapperMethod.java:202)
    	at org.apache.ibatis.reflection.wrapper.MapWrapper.get(MapWrapper.java:45)
    	at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:122)
    	at org.apache.ibatis.executor.BaseExecutor.createCacheKey(BaseExecutor.java:219)
    	at org.apache.ibatis.executor.CachingExecutor.createCacheKey(CachingExecutor.java:146)
    	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:82)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:497)
    	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
    	at com.sun.proxy.$Proxy18.selectList(Unknown Source)
    	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:230)
    	at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137)
    	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75)
    	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)
    	at com.sun.proxy.$Proxy19.findByStart(Unknown Source)
    	at com.yc.zip.impl.HotelBizImpl.findByStart(HotelBizImpl.java:61)
    	at com.yc.controller.HotelController.findByStart(HotelController.java:48)
    	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:497)
    	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
    	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
    	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
    	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
    	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
    	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1152)
    	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2527)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2516)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    	at java.util.concurrent.ThreadPoolExecutor$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)

在Dao层当只有一个参数时，没什么好说的，传进去一个值也只有一个参数可以匹配。当存在多个参数时，传进去的值就区分不开了。

解决方法：在对应的抽象方法参数前加@Param（“参数名”）注解

List<Hotel> findByStart(@Param("start") String start, @Param("pageNum") Integer pageNum);