Spring Aop代理

最新推荐文章于 2024-08-10 06:00:00 发布

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最新推荐文章于 2024-08-10 06:00:00 发布

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用Aop代理就不用自己写代理对象，spring会自动生成代理对象。

下面用一个实例说明：

Person.java

package com.lx.spring.aop;

public class Person {

	private Integer id;
	
	private String name;

	
	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	
	
}

PersonDao.java

package com.lx.spring.aop;

public interface PersonDao {

	public void savePerson(Person person);
}

PersonDaoImpl.java

package com.lx.spring.aop;

public class PersonDaoImpl extends HibernateUitl implements PersonDao {

	
	public void savePerson(Person person) {
		
         sessionFactory.getCurrentSession().save(person);
	}

}

HibernateUtil.java

package com.lx.spring.aop;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUitl {

	public static SessionFactory sessionFactory;
	static{
		Configuration configuration = new Configuration();
		configuration.configure("com/lx/spring/aop/hibernate.cfg.xml");
		sessionFactory = configuration.buildSessionFactory();
	}
}

PersonTest.java

package com.lx.spring.aop;

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

public class PersonTest {

	@Test
	public void test()
	{
	 
		ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");	
		PersonDaoImpl personDao = (PersonDaoImpl) context.getBean("personDao");
	    Person person = new Person();
	    person.setName("mair");
	    personDao.savePerson(person);
	}
}

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:aop="http://www.springframework.org/schema/aop" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">              
           
     <bean id="personDao" class="com.lx.spring.aop.PersonDaoImpl"></bean>
     
     <bean id="mytransaction" class="com.lx.spring.aop.MyTransaction"></bean>
     
     <aop:config>
        
        <aop:pointcut expression="execution(* com.lx.spring.aop.PersonDaoImpl.*(..))" id="perform"/>
        
        <aop:aspect ref="mytransaction">
           <aop:before method="beginTransaction" pointcut-ref="perform"/>
           <aop:after-returning method="commit" pointcut-ref="perform"/>
        </aop:aspect>
        
     </aop:config>
</beans>

用debug可以查看spring采用哪种代理方式。

默认的采用：jdk代理

将PersonDaoImpl.java不实现PersonDao接口