(报错解决)Exception encountered during context initialization
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(报错解决)Exception encountered during context initialization
关键词
JavaEE JavaWeb eclipse XML AspectJ
描述
1.报错记录。摸索中。轻喷。
2.《Java EE框架整合开发入门到实战:Spring+Spring MVC+MyBatis(微课版)》4.4节“基于XML配置开发AspectJ”
报错
警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testDao' defined in class path resource [aspectj/xml/applicationContext.xml]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.aop.aspectj.AspectJPointcutAdvisor#1': Cannot create inner bean '(inner bean)#57175e74' of type [org.springframework.aop.aspectj.AspectJAfterReturningAdvice] while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#57175e74': Cannot create inner bean '(inner bean)#7bb58ca3' of type [org.springframework.aop.config.MethodLocatingFactoryBean] while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#7bb58ca3': Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: Unable to locate method [afterReturning] on bean [myAspect]
检查
拖到最右边查看报错
Unable to locate method [afterReturning] on bean [myAspect]
就是说bean实例myAspect中的方法afterReturning有问题。
检查MyAspect.java中的方法afterReturning。与applicationContext.xml对应位置进行比较。
发现是MyAspect.java中的方法afterReturning拼写有问题(多写了个n)。与applicationContext.xml对应不上。
解决
将MyAspect.java中的方法afterReturnning改为afterReturning。与applicationContext.xml中的afterReturning对应上。
总结
1.查看eclipse报错部分的最上面的最右边
2.检查xml文件以及报错提示的bean对应java文件。
(补充)项目
结构
package aspectj.xml;
applicationContext.xml
MyAspect.java
package aspectj.xml;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
//切面类,在此类中编写各种类型的通知
public class MyAspect {
//前置通知,使用JoinPoint接口作为参数获得目标对象信息
public void before(JoinPoint jp){
System.out.println("前置通知:模拟权限控制");
System.out.println(",目标类对象:"+jp.getTarget()+",被增强处理的方法:"+jp.getSignature().getName());
}
//后置返回通知
public void afterReturnning(JoinPoint jp){
System.out.println("后置返回通知:"+"模拟删除临时文件");
System.out.println(",被增强处理的方法"+jp.getSignature().getName());
}
/**
* 环绕通知
* ProceedingJoinPoint是JoinPoint的子接口,代表可以执行的目标方法
* 返回值的类型必须是一个Object
* 必须一个参数是ProceedingJoinPoint类型
* 必须throws Throwable
* @param pjp
* @return
* @throws Throwable
*/
public Object around(ProceedingJoinPoint pjp) throws Throwable{
//开始
System.out.println("环绕开始:执行目标方法前,模拟开始事务");
//执行当前目标方法
Object obj = pjp.proceed();
//结束
System.out.println("环绕结束:执行目标方法后,模拟关闭事务");
return obj;
}
//异常通知
public void except(Throwable e){
System.out.println("异常通知:"+"程序执行异常"+e.getMessage());
}
//后置(最终)通知
public void after(){
System.out.println("最终通知:模拟释放资源");
}
}
XMLAspectJTest.java
package aspectj.xml;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import dynamic.jdk.TestDao;
public class XMLAspectJTest {
//在主方法中使用Spring容器获取代理对象,并执行目标方法
public static void main(String[] args) {
ApplicationContext appCon = new ClassPathXmlApplicationContext("/aspectj/xml/applicationContext.xml");
//从容器中获取增强后的目标对象
TestDao testDaoAdvice = (TestDao)appCon.getBean("testDao");
//执行方法
testDaoAdvice.save();
/*
前置通知:模拟权限控制
,目标类对象:dynamic.jdk.TestDaoImpl@45b9a632,被增强处理的方法:save
环绕开始:执行目标方法前,模拟开始事务
保存
最终通知:模拟释放资源
环绕结束:执行目标方法后,模拟关闭事务
后置返回通知:模拟删除临时文件
,被增强处理的方法save
*/
}
}
package dynamic.jdk;
TestDao.java
package dynamic.jdk;
public interface TestDao {
public void save();
public void modify();
public void delete();
}
TestDaoImpl.java
package dynamic.jdk;
//该实现类作为目标类,在代理类中对实现类的方法进行增强处理
public class TestDaoImpl implements TestDao {
@Override
public void save() {
System.out.println("保存");
}
@Override
public void modify() {
System.out.println("修改");
}
@Override
public void delete() {
System.out.println("删除");
}
}
运行结果(运行XMLAspectJTest.java)
转:
(报错解决)Exception encountered during context initialization
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