AOP implementation based on proxy class Proxyfactorybean---Pre-notification code implementation _ code

Code:

1. configuration file

Applicationcontext.xml

<?xml version= "1.0" encoding= "UTF-8"?> <beans "xmlns=" 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-2.5.xsd "> <!--configuration Create Userdaoimpl instance--> <bean id=" Userdao "class=" Com.springtest1.dao.UserDAOImpl "> </bean> <!--configuration Create Userbizimpl instance--> <bean id=" userbiz "class=" com . Springtest1.biz.UserBizImpl > <!--Dependency Injection data Access Layer component--> <property name= "Userdao" ref= "Userdao"/> </b Ean> <!--define--> <bean id= "Logadvice" class= "Com.springtest1.aop.LogAdvice" ></bean> <! --Defines a proxy class, named UB, that accesses methods in the business class through UB--> <bean id= "UB" class= "Org.springframework.aop.framework.ProxyFactoryBean" > <property name= "proxyinterfaces" > <value>com.springtest1.biz.userbiz</value> </property> <property name= "Interceptornames" > <list> <value>logadvice</val ue> </list> </property> <property name= "target" ref= "userbiz" ></property> </b Ean> </beans>

2. Writing the business logic layer

Userbiz.java

Package com.springtest1.biz;

Public interface Userbiz {
   //Add user public
	void addUser (String username,string password);
	Delete user public
	void deluser (int id);
}

Userbizimpl.java

Package com.springtest1.biz;

Import Com.springtest1.dao.UserDAO;
Import Com.springtest1.dao.UserDAOImpl;
The public class Userbizimpl implements Userbiz {//////
	with the Userdao interface declares an object
	//and adds a set method for it, which is used for dependency injection
	Userdao Userdao;
	public void Setuserdao (Userdao userdao) {
		This.userdao=userdao;
	}

	@Override public
	void AddUser (string username, string password) {
		//TODO auto-generated method stub
       Userdao.adduser (username, password);
	}

	@Override public
	void deluser (int id) {
		//TODO auto-generated method stub
       userdao.deluser (ID);
       throw new RuntimeException ("This is a specially thrown exception message.) ");
	}

}

3. Write Data Access Layer

Userdao.java

Package Com.springtest1.dao;

Public interface Userdao {
   //Add user public
	void addUser (String username,string password);
	Delete user public
	void deluser (int id);
}

Userdaoimpl.java

Package Com.springtest1.dao;

public class Userdaoimpl implements Userdao {

	@Override public
	void AddUser (string username, string password) {
  //TODO auto-generated Method Stub
       System.out.println (username+ "User add Success");

	@Override public
	void deluser (int id) {
		//TODO auto-generated method stub
       System.out.println ("numbered as" +id+ "The user is deleted");
	}

4. Programming AOP Facets

Logadvice.java

Package COM.SPRINGTEST1.AOP;

Import Java.lang.reflect.Method;
Import Org.springframework.aop.MethodBeforeAdvice;
Import Org.apache.log4j.Logger;

public class Logadvice implements Methodbeforeadvice {

	private Logger Logger=logger.getlogger (logadvice.class);
	public void before (method method, object[] args, Object target) throws Throwable {
		//get the called Class name
		String targetclassn Ame=target.getclass (). GetName ();
		Gets the called method name
		String targetmethodname=method.getname ();
		Log format string string
		loginfotext= "predecessor notification: the" +targetmethodname+ "Method of the +targetclassname+ class begins execution";
		Writes log information to the configured file
		logger.info (loginfotext);
	}

5. Test class

Aoptest.java

Package com.springtest1;

Import Org.springframework.context.ApplicationContext;
Import Org.springframework.context.support.ClassPathXmlApplicationContext;

Import Com.springtest1.biz.UserBiz;

public class Aoptest {public
	static void Main (string[] args) {
		//TODO auto-generated Method stub
		//Load Applica Tioncontext.xml configuration
		applicationcontext context=new classpathxmlapplicationcontext ("Applicationcontext.xml");
		Gets the Userbizimpl instance in the configuration
		userbiz userbiz = (userbiz) Context.getbean ("UB");	
		Userbiz.adduser ("Zhangsan", "123");
		Userbiz.deluser (1);
	}

}

6. Screenshot