Spring中Bean创建异常 求帮忙解决一下!!!!!!
鸡蛋坑 2018-01-10 10:14:39 在配置简单的ssm框架时 写了一个测试类, 想测试一下spring和mybatis是否整合成功.
报一下错误
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mybatisTest.test2': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.service.StuService mybatisTest.test2.stuService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.service.StuService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1202)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:385)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:110)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:319)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:212)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:232)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:175)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.service.StuService mybatisTest.test2.stuService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.service.StuService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
... 26 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.service.StuService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1308)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1054)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:949)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
... 28 more
这是我的spring配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<context:component-scan base-package="com.service"/>
<!-- 1配置数据库相关参数 -->
<context:property-placeholder location="classpath:Jdbc.properties" />
<!-- 2配置连接池 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcurl" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 3配置SqlSessionFactory工厂 -->
<bean id="SqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 3.1首先加载数据源 -->
<property name="dataSource" value="dataSource"/>
<!-- 3.2加载mybatis的配置文件 -->
<property name="configLocation" value="classpath:MybatisConfig.xml"/>
<property name="mapperLocation" value="classpath:stuMapper.xml"/>
</bean>
<!-- 4配置Mapper扫描器,进行映射 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 注入SqlSessionFactory -->
<!-- 4.1加载SqlSessionFactory工厂 -->
<property name="SqlSessionFactoryBeanName" value="SqlSessionFactory"/>
<!-- 4.2扫描mapper接口 -->
<property name="basepackage" value="com.mapper"/>
</bean>
<!-- 5配置事物管理 -->
<bean id="txManger"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager" >
<!-- 5.1加载数据源 -->
<property name="dataSource" value="dataSource"/>
</bean>
<!-- 6声明式事物 -->
<tx:annotation-driven transaction-manager="txManger"/>
</beans>
dao接口
package com.mapper;
import java.util.List;
import org.springframework.stereotype.Repository;
import com.entity.student;
@Repository
public interface StuDao {
//按学号查询学生信息
public student findStuBySno(int sno) throws Exception;
//查询全部学生
public List<student> findStuAll() throws Exception;
}
service接口
package com.service;
import java.util.List;
import com.entity.student;
public interface StuService {
public student findStuBySno (int sno) throws Exception;
public List<student> findStuAll() throws Exception;
}
service 实现类
package com.serviceImp;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.entity.student;
import com.mapper.StuDao;
import com.service.StuService;
@Service("stuService")
public class StuServiceImp implements StuService {
@Autowired
private StuDao studao;
public student findStuBySno(int sno) throws Exception {
return this.studao.findStuBySno(sno);
}
public List<student> findStuAll() throws Exception {
return this.studao.findStuAll();
}
}
stumapper.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mapper.StuDao">
<!-- 按学号查询信息 -->
<select id="findStuBySno" parameterType="int" resultType="com.entity.student" >
SELECT * FROM stu_info WHERE sno = #{sno}
</select>
<!-- 查询全部学生 -->
<select id="findStuAll" parameterType="com.entity.student" resultType="com.entity.student" >
SELECT * FROM stu_info WHERE
</select>
</mapper>