spring整合mybatis错误：Could not autowire field: com.kjczwl.ssm.service.ItemsService com.kjczwl.ssm.controller.ItemsController.itemsservice;

2022-10-14 13:18:22

　　运行环境：jdk1.7.0_17+tomcat 7 + spring：3.2.0 +mybatis：3.2.7+ eclipse

　　错误：Could not autowire field: com.kjczwl.ssm.service.ItemsService com.kjczwl.ssm.controller.ItemsController.itemsservice;

　　错误原因：spring的@Autowired 无法注入service的bean（spring+mybatis）

　　解决办法：在配置时候，写的mapper扫描注解，并且在接口实现出注解@Service都不能解决问题，在学习群中问了写大神，后面仔细检查了下，发现注解service id和我的controller 里面注解引用的的不一样，我的service id “itemsService”，controller 　　　　　　　　“itemsservice”,

　　错误代码：

 Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@5c620819: defining beans [itemsController,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,itemsServiceImpl,mvcContentNegotiationManager,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler#0,org.springframework.web.servlet.handler.SimpleUrlHandlerMapping#0,org.springframework.web.servlet.view.InternalResourceViewResolver#0,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@1afd5978

 Context initialization failed

 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'itemsController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.kjczwl.ssm.service.ItemsService com.kjczwl.ssm.controller.ItemsController.itemsssService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.kjczwl.ssm.service.ItemsService] is defined: expected single matching bean but found 2: [itemsServiceImpl, itemsService]

 4     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)

     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1120)

     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:522)

     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)

     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)

     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)

     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)

     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)

     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:607)

     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)

     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)

     at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:647)

     at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:598)

     at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:661)

     at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:517)

     at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:458)

     at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:138)

     at javax.servlet.GenericServlet.init(GenericServlet.java:160)

     at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)

     at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193)

     at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088)

     at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5176)

     at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5460)

     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)

     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)

     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)

     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)

     at java.util.concurrent.FutureTask.run(FutureTask.java:166)

     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

     at java.lang.Thread.run(Thread.java:722)

 Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.kjczwl.ssm.service.ItemsService com.kjczwl.ssm.controller.ItemsController.itemsssService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.kjczwl.ssm.service.ItemsService] is defined: expected single matching bean but found 2: [itemsServiceImpl, itemsService]

     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)

     at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)

     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)

     ... 30 more

 Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.kjczwl.ssm.service.ItemsService] is defined: expected single matching bean but found 2: [itemsServiceImpl, itemsService]

     at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:825)

     at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)

     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)

     ... 32 more

　　相关代码：

這是接口实现类

 package com.kjczwl.ssm.service.impl;

 import java.util.List;

 import org.springframework.beans.factory.annotation.Autowired;

 import org.springframework.stereotype.Service;

 import com.kjczwl.ssm.mapper.ItemsMapperCustom;

 import com.kjczwl.ssm.po.ItemsCustom;

 import com.kjczwl.ssm.po.ItemsQueryVo;

 import com.kjczwl.ssm.service.ItemsService;

 /**

      *   商品管理

      * @author 唐烈

      *

      */

 @Service

 public class ItemsServiceImpl implements ItemsService{

     @Autowired

         ItemsMapperCustom itemsMapperCustom;

     @Override

     public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception {

         //通过ItemsMapperCustom来查询数据库 通过注解自动扫描  所以這里什么都不用写

         return itemsMapperCustom.findItemsList(itemsQueryVo);

     }

 }

controller类

 package com.kjczwl.ssm.controller;

 import java.util.List;

 import org.springframework.beans.factory.annotation.Autowired;

 import org.springframework.stereotype.Controller;

 import org.springframework.web.bind.annotation.RequestMapping;

 import org.springframework.web.portlet.ModelAndView;

 import com.kjczwl.ssm.po.ItemsCustom;

 import com.kjczwl.ssm.service.ItemsService;

 /**

  *<p>package:  com.kjczwl.ssm.controller</p>

  *<p>Description:商品的controller(Handler) </p>

  *<p>Company: Springmvc_Mybits_store</p>

  *@author:         唐烈

  * @date            2017下午5:30:58

  */

 @Controller// 注解模式开发Controller

 public class ItemsController {

     // 注入 从service 中取得数据

     @Autowired

     ItemsService itemsservice; //错误问题出现這里


     //注解扫描， 后面映射地址  可通过queryItems.action 访问

     @RequestMapping("/queryItems")

     public ModelAndView queryItems()throws Exception{

         //得到数据

         List<ItemsCustom> itemsList = itemsssService.findItemsList(null);

         // 构造ModelAndView

         ModelAndView modelAndView = new ModelAndView();

         // 添加到内存区 外面直接“${} 条件表达式获取”

         modelAndView.addObject("itemsList", itemsList);

         //转发的路径

         modelAndView.setViewName("pages/itemsList");

         return modelAndView;

     }

 }

applicationContext-service.xml 配置

     <beans

         xmlns="http://www.springframework.org/schema/beans"

        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

        xmlns:p="http://www.springframework.org/schema/p"

        xmlns:context="http://www.springframework.org/schema/context"

        xmlns:mvc="http://www.springframework.org/schema/mvc"

         xmlns:tx="http://www.springframework.org/schema/tx"

         xmlns:aop="http://www.springframework.org/schema/aop"

           xsi:schemaLocation="http://www.springframework.org/schema/beans

                                       http://www.springframework.org/schema/beans/spring-beans.xsd

                                       http://www.springframework.org/schema/context

                                     http://www.springframework.org/schema/context/spring-context-3.2.xsd

                                     http://www.springframework.org/schema/mvc

                                     http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd

                                     http://www.springframework.org/schema/tx

                                     http://www.springframework.org/schema/tx/spring-tx-3.2.xsd

                                     http://www.springframectivework.org/schema/aop

                                     http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">

     <!-- 商品管理的service -->

     <bean id="itemsService" class="com.kjczwl.ssm.service.impl.ItemsServiceImpl"/>

 </beans>

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