java spring aop:java.lang.IllegalArgumentException:错误在::0找不到引用的切入点LoginMethod

Question

我设计了一个数据库应用程序，但现在在使用 spring aop 连接到数据库时处理异常时遇到问题。涉及的类如下所示:

登录接口(interface).java

interface LoginInterface {
    ApplicationContext context = new ClassPathXmlApplicationContext("LoginApp.xml");
    Login login = (Login) context.getBean("Login");
    login.loginMethod(username,password);
}

登录.java

class Login {
    public void loginMethod(String username, char[] pwd) throws ClassNOtFoundException, SQLException{
         ...
    }
}

LoginProfiler.java

@Aspect
public class LoginProfiler {

    @Pointcut("execution(* dbapp.Login.loginMethod(String, char[])throws java.lang.ClassNotFoundException, java.sql.SQLException)")
    public void loginMethod() {
    }

    @Around("loginMethod()")
    public void handleException(final ProceedingJoinPoint pJoinPoint) throws Throwable {
        try {
            pJoinPoint.proceed();
        } catch (Exception e) {
            if ((e.getCause().toString()).contains("UnknownHostException"))
                System.out.println("Unknown Host ");
            else if ((e.getCause().toString()).contains("ConnectException"))
                System.out.println("Connection Problem ");
        }
    }
}

LoginApp.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:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
                        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
    default-destroy-method="destroy"
    default-init-method="afterPropertiesSet"
    default-autowire="byName">

    <!-- Enable the @AspectJ support -->
    <aop:aspectj-autoproxy />

    <bean id="LoginProfiler" class="dbapp.LoginProfiler" />
    <bean id="Login" class="dbapp.Login" />
</beans>

我遇到以下异常:

Erg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'Login' defined in class path resource [LoginApp.xml]: Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: error at ::0 can't find referenced pointcut LoginMethod
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:480)
    at 
    ..
Caused by: java.lang.IllegalArgumentException: error at ::0 can't find referenced pointcut LoginMethod
    at org.aspectj.weaver.tools.PointcutParser.parsePointcutExpression(PointcutParser.java:315)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.buildPointcutExpression(AspectJExpressionPointcut.java:206)
    at 

Answer 1

试试这个。

@Aspect
public class LoginProfiler {

       @Pointcut("execution(* dbapp.Login.loginMethod(String, char[])throws java.lang.ClassNotFoundException, java.sql.SQLException)")
       public void loginMethod(){}

       @AfterThrowing("loginMethod()")
        public void handleException(final JoinPoint joinPoint){ 
               System.out.println("Am able to Handle");
        }
}

或

@Aspect
public class LoginProfiler {

       @AfterThrowing("execution(* dbapp.Login.loginMethod(String, char[])throws java.lang.ClassNotFoundException, java.sql.SQLException)")
        public void handleException(final JoinPoint joinPoint){ 
               System.out.println("Am able to Handle");
        }
}

另外，如果你花一些时间学习一下 spring-aop 会更好。从你的问题来看，你确实不懂AOP。您正在尝试从一些示例代码中剪切并粘贴。