问答首页 → 入门技术
0 0

初学spring aop 遇到了object is not an instance of declaring class的问题0

CompareInterceptor类

package com.spring.advice;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
public class CompareInterceptor implements MethodInterceptor {
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
    // TODO Auto-generated method stub
    Object result = null;
    String sname = invocation.getArguments()[0].toString(); 
    if(sname.equals("forever")){
         result = invocation.proceed();
    }
    else{
     System.out.println("此学生是："+sname+"，而不是forever");
    }
    return result;
}


}

Test 类
package com.spring.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.spring.aop.Istudent;

public class Test {
public static void main(String args[]){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
Istudent st = (Istudent)context.getBean("student");
st.addStudent("forever");
}
}

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<bean id="beforeAdvice" class="com.spring.advice.BeforeAdvice"  />
<bean id="afterAdvice" class="com.spring.advice.AfterAdvice"  />
<bean id="compareInterceptor" class="com.spring.advice.CompareInterceptor"  />
<bean id="studentTarget" class="com.spring.aop.StudentImpl"  />


<bean id="student" class="org.springframework.aop.framework.ProxyFactoryBean"  >
  <property name="proxyInterfaces">
      <value>com.spring.aop.Istudent</value>
  </property>
  <property name="interceptorNames">
       <list>
           <value>beforeAdvice</value>
           <value>afterAdvice</value>
           <value>compareInterceptor</value>
       </list>
  </property>
  <property name="target">
       <value>studentTarget</value>
  </property>
</bean>    



只要不是参数不是forever，一切都正常。。。求帮助！
spring aop 
2014年4月09日 16:16

3个答案 按时间排序 按投票排序

0 0

采纳的答案

把代码贴全一点

2014年4月09日 16:31
0 0

<bean id="student" class="org.springframework.aop.framework.ProxyFactoryBean">
  <property name="proxyInterfaces">
      <value>com.spring.aop.Istudent</value>
  </property>
  <property name="interceptorNames">
       <list>
           <value>beforeAdvice</value>
           <value>afterAdvice</value>
           <value>compareInterceptor</value>
           <value>studentTarget</value>
       </list>
  </property>

</bean> 

2014年4月11日 16:13
0 0

您的语句中 if(sname.equals("forever"))中间的这个forver显得怪怪的，你难道不这么觉得？？？

2014年4月10日 08:36

相关推荐

Magicbox
Ask-but
我的问答 FAQ | 勋章

相关推荐

已解决问题

未解决问题

排行榜

Global site tag (gtag.js) - Google Analytics