代码如下：
接口类：
package nh.spring.tools.dao;
/*
-
定义计算机接口类，
*/
public interface ICalc {public int add(int i,int j);
public int div(int i,int j);
}
实现类：
package nh.spring.tools.dao;
import org.springframework.stereotype.Controller;
/**
- 定义计算机接口实现类
- @author Administrator * */
@Controller
public class CalcImpl implements ICalc {
@Override
public int add(int i, int j) {
return i + j;
}
@Override
public int div(int i, int j) {
return i / j;
}
}
配置applicationcontext
<?xml version="1.0" encoding="UTF-8"?>
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-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
<!-- 设置spring自动扫描 -->
<context:component-scan base-package="nh.spring.tools.*"></context:component-scan>
<!-- 开启aop -->
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
配置切面
package nh.spring.tools.aop.aspects;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
@Aspect
@Component
public class LoggingAspects {
@Before("execution(public int nh.spring.tools.dao.CalcImpl.*(int,int))")
public void beforeMethod(){
System.out.println("the method start with :");
}
}
测试类：
package nh.spring.tools.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import nh.spring.tools.dao.CalcImpl;
public class TestCalc1 {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("CalcImpl1.xml");
CalcImpl iCalc = context.getBean(CalcImpl.class);
int result = iCalc.add(10, 2);
System.out.println(result+"");
}
}
报错
log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [nh.spring.tools.dao.CalcImpl] is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:348)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:335)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1088)
at nh.spring.tools.test.TestCalc1.main(TestCalc1.java:13)
如果注销掉切面类的before注解，就可以正常执行，请问是怎么回事？
