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@Autowired一直为空 小白求解

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查看11 | 回复5 | 2021-1-27 06:37:02 | 显示全部楼层 |阅读模式
工程目錄

controller

sercive

serviceimpl

springmvc.xml

springmvc-dao.xml

applicationContext-service.xml

applicationcontext-transaction.xml

web.xml的配置：

下面是报错：
java.lang.NullPointerException
atcom.cll.ssm.service.impl.ItemsServiceImpl.findItemsList(ItemsServiceImpl.java:26)
atcom.cll.ssm.controller.ItemsController.queryItems(ItemsController.java:30)
atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)
atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
atjava.lang.reflect.Method.invoke(Method.java:606)
atorg.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
atorg.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
atorg.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:746)
atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:687)
atorg.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
atorg.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
atorg.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
atorg.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915)
atorg.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811)
atjavax.servlet.http.HttpServlet.service(HttpServlet.java:624)
atorg.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796)
atjavax.servlet.http.HttpServlet.service(HttpServlet.java:731)
atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
atorg.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
atorg.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
atorg.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
atorg.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
atorg.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
atorg.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
atorg.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2476)
atorg.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2465)
atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
atorg.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
atjava.lang.Thread.run(Thread.java:744)
二月24,20197:28:26下午org.apache.catalina.core.StandardWrapperValveinvoke
严重:Servlet.service()forservlet[springmvc]incontextwithpath[/springmvc_mybatis]threwexception[Requestprocessingfailed;nestedexceptionisjava.lang.NullPointerException]withrootcause
java.lang.NullPointerException
atcom.cll.ssm.service.impl.ItemsServiceImpl.findItemsList(ItemsServiceImpl.java:26)
atcom.cll.ssm.controller.ItemsController.queryItems(ItemsController.java:30)
atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)
atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
atjava.lang.reflect.Method.invoke(Method.java:606)
atorg.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
atorg.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
atorg.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:746)
atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:687)
atorg.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
atorg.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
atorg.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
atorg.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915)
atorg.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811)
atjavax.servlet.http.HttpServlet.service(HttpServlet.java:624)
atorg.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796)
atjavax.servlet.http.HttpServlet.service(HttpServlet.java:731)
atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
atorg.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
atorg.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
atorg.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
atorg.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
atorg.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
atorg.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
atorg.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2476)
atorg.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2465)
atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
atorg.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
atjava.lang.Thread.run(Thread.java:744)

分 -->
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千问 | 2021-1-27 06:37:02 | 显示全部楼层
applicationcontext-transaction.xml

web.xml的配置：


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千问 | 2021-1-27 06:37:02 | 显示全部楼层
com.cll.ssm.service.impl.ItemsServiceImpl.findItemsList(ItemsServiceImpl.java:26)
应该是你ItemsServiceImpl中的itemsMapperCustom没有被成功注入
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千问 | 2021-1-27 06:37:02 | 显示全部楼层
淘淘商城吧


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千问 | 2021-1-27 06:37:02 | 显示全部楼层
你的service层没有加上@Transactional注解
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千问 | 2021-1-27 06:37:02 | 显示全部楼层
配置文件开启注解开发了嘛，，，contorller注解也加上
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