springboot项目dao层无法注入mapper

weixin_42821094 2019-12-29 02:33:27
1.报错信息如下：
Description:



Field orderVoMapper in com.liuhuiwu.service.OrderServiceImpl required a bean of type 'com.liuhuiwu.dao.OrderVoMapper' that could not be found.



The injection point has the following annotations:

	- @org.springframework.beans.factory.annotation.Autowired(required=true)



Action:



Consider defining a bean of type 'com.liuhuiwu.dao.OrderVoMapper' in your configuration.


2.service层注入正常，但是mapper接口一直无法注入，试了网上大神们的各种方法，均不见效。希望求大神指点！

3.项目结构图如下

4.application.yml配置文件：
mybatis:

  # mybatis配置文件所在路径

  config-location: classpath:mybatis/generatorConfig.xml

  mapper-locations: classpath:resources/mapping/*.xml

  type-aliases-package: com.liuhuiwu.dao

5.xml文件命名空间：
<mapper namespace="com.liuhuiwu.dao.OrderVoMapper">


6.service实现类代码
 * @version 1.0

 * @date 2019/11/29 19:26

 */

@Service

public class OrderServiceImpl implements OrderService{

    @Autowired

    OrderVoMapper orderVoMapper;

    @Override

    public List<OrderVo> getOrder(String phoneNumber) {

        OrderVoExample example = new OrderVoExample();

        OrderVoExample.Criteria criteria = example.createCriteria();

        criteria.andPhoneNumberEqualTo(phoneNumber);

        return orderVoMapper.selectByExample(example);

    }

}

7.mapper接口代码：
package com.liuhuiwu.dao;



import java.util.List;



import com.liuhuiwu.vo.OrderVo;

import com.liuhuiwu.vo.OrderVoExample;

import org.apache.ibatis.annotations.Mapper;

import org.apache.ibatis.annotations.Param;

import org.springframework.stereotype.Component;



@Mapper

@Component(value = "OrderVoMapper")

public interface OrderVoMapper {

    long countByExample(OrderVoExample example);



    int deleteByExample(OrderVoExample example);



    int deleteByPrimaryKey(String phoneNumber);



    int insert(OrderVo record);



    int insertSelective(OrderVo record);



    List<OrderVo> selectByExample(OrderVoExample example);



    OrderVo selectByPrimaryKey(String phoneNumber);



    int updateByExampleSelective(@Param("record") OrderVo record, @Param("example") OrderVoExample example);



    int updateByExample(@Param("record") OrderVo record, @Param("example") OrderVoExample example);



    int updateByPrimaryKeySelective(OrderVo record);



    int updateByPrimaryKey(OrderVo record);

}
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Boiled_meat 2020-01-03
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有了@mapper注解就不需要@Component，把@Component注解去掉，@Component不是这样用的
_沉浮_ 2020-01-02
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首先，如上面所说的，xml路径需要改正，其次，查看下编译后的代码有没有把这些xml编译进去
虹猫大侠 2019-12-31
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dao层加个@Mapper就可以了
虹猫大侠 2019-12-31
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mybatis.mapper-locations=classpath:/mapper/*Mapper.xml
weixin_42821094 2019-12-30
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引用 1 楼 Valerie00 的回复:
启动类增加注解@MapperScan（“dao层包结构路径”）
此方法，我也试过，在启动类假扫描指定包，会报找不到sqlFessionFactory等错误。如下: 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'OrderVoMapper' defined in file [F:\ideaapplication\target\classes\com\liuhuiwu\dao\OrderVoMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1803) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:636) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	... 37 common frames omitted
Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
	at org.springframework.util.Assert.notNull(Assert.java:198) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.mybatis.spring.support.SqlSessionDaoSupport.checkDaoConfig(SqlSessionDaoSupport.java:122) ~[mybatis-spring-2.0.3.jar:2.0.3]
	at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:73) ~[mybatis-spring-2.0.3.jar:2.0.3]
	at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) ~[spring-tx-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1862) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1799) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	... 47 common frames omitted
weixin_42821094 2019-12-30
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引用 2 楼 dkwuxiang 的回复:
mapper-locations: classpath:resources/mapping/*.xml classpath: 即代表指定 resource目录下了你这里应该是 classpath:mapping/*.xml
其实这个我也改过，同样会报此错。
_Ricky_ 2019-12-30
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最简单的方式，启动类（Application.java)头部加注解@MapperScan（“com.xxx.dao”）
dkwuxiang 2019-12-30
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mapper-locations: classpath:resources/mapping/*.xml classpath: 即代表指定 resource目录下了你这里应该是 classpath:mapping/*.xml
dkwuxiang 2019-12-30
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dao层注解使用 @Mapper，@Component(value = "OrderVoMapper")换掉试试 @Repository
_Ricky_ 2019-12-30
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引用 5 楼 weixin_42821094 的回复:
[quote=引用 1 楼 Valerie00 的回复:] 启动类增加注解@MapperScan（“dao层包结构路径”）
此方法，我也试过，在启动类假扫描指定包，会报找不到sqlFessionFactory等错误。如下: 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'OrderVoMapper' defined in file [F:\ideaapplication\target\classes\com\liuhuiwu\dao\OrderVoMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1803) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:636) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	... 37 common frames omitted
Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
	at org.springframework.util.Assert.notNull(Assert.java:198) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.mybatis.spring.support.SqlSessionDaoSupport.checkDaoConfig(SqlSessionDaoSupport.java:122) ~[mybatis-spring-2.0.3.jar:2.0.3]
	at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:73) ~[mybatis-spring-2.0.3.jar:2.0.3]
	at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) ~[spring-tx-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1862) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1799) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
	... 47 common frames omitted
[/quote] 检查下jar包是不是冲突了，比如mybatis-spring-boot-starter，或者换个版本试试
Valerie00 2019-12-29
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启动类增加注解@MapperScan（“dao层包结构路径”）
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