org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type '全类名'

港控/mmm° 2023-07-03 03:24 11阅读 0赞

该错误是在练习Spring - aop的时候出现的

**先说总结有利于大家还有没有必要往后面在继续看下去**：错误出在获取bean的时候，我获取的是该接口的实现类类型，解决办法就是获取该接口的类型，不要获取该接口的实现类![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70]  
**项目架构**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 1]  
Maven

<dependencies>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>5.1.0.RELEASE</version>
            </dependency>
            
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.9.1</version>
            </dependency>
    
            <dependency>
                <groupId>aopalliance</groupId>
                <artifactId>aopalliance</artifactId>
                <version>1.0</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>5.1.0.RELEASE</version>
            </dependency>
    
            
            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>1.1.1</version>
            </dependency>
    
        </dependencies>

xml

<?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:context="http://www.springframework.org/schema/context"
           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.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop.xsd">
    
        
        <context:component-scan base-package="com.stone.aopdome"/>
    
        
        <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
    
    
    </beans>

Operation类

@Component
    public interface Operation
    {
        //  加法
         double add(double i,double j);
        //  减法
         double subtract(double i,double j);
        //  乘法
         double mul(double i,double j);
        //  除法
          double div(double i,double j);
    }

Operation目标类

@Component
    public class OperationImpl implements Operation
    {
        @Override
        public double add(double i, double j)
        {
            return i+j;
        }
    
        @Override
        public double subtract(double i, double j)
        {
            return i-j;
        }
    
        @Override
        public double mul(double i, double j)
        {
            return i*j;
        }
    
        @Override
        public double div(double i, double j)
        {
            return i/j;
        }
    }

OperationProxy 目标实现类

@Aspect
    @Component
    public class OperationProxy
    {
        //   execution切入点表达式 (访问修饰符 返回值类型 目标执行的方法)
        @Before("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
        public void logbefore(){
            System.out.println("我是前置通知");
        }
    
        @After("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
        public void logAfter(){
            System.out.println("我是后置通知");
        }
    
    
        @AfterThrowing("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
        public void logException(){
            System.out.println("我是异常通知");
        }
        @AfterReturning("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
        public void logFinal(){
            System.out.println("我是最终通知");
        }
    }

SpringAopTest 测试类

public class SpringAopTest
    {
        private ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");
    
        @Test
        public void testaop1(){
            Operation bean = ioc.getBean(OperationImpl.class);
            double add = bean.add(12.0, 20.0);
            System.out.println(add);
    
        }
    }

个人本来以为是缺少了什么Maven依赖造成的 ，可原因并不是如此，而是我获取bean的时候，是获取了该类的实现类，解决错误的办法就是在获取bean的时候，不要获取目标对象的实现类，直接获取该接口类就行

错误代码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 2]

错误修改  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 3]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200201171221802.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200201170719520.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200201171718331.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200201171703675.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx,size_16,color_FFFFFF,t_70