這裡我們就簡單寫一個例子來看一下cglib代理：
首先先匯入cglib的jar包，cglib-nodep.jar，大家可以自行去官網下載即可。
首先建立一個介面：PersonDao

public interface PersonDao {
    public void savePerson();
}

建立介面的實現類：PersonDaoImpl

public class PersonDaoImpl implements PersonDao{
    @Override
    public void savePerson() {
        // TODO Auto-generated method stub
 

        System.out.println("savePerson...........");
    }
}

事務類：

public class Transaction {
    public void beginTransaction() {
        System.out.println("begin Transaction");
    }
    public void commit() {
        System.out.println("commit...");
    }
}

建立攔截器MyInterceptor：

public class
 
 MyInterceptor implements MethodInterceptor{
    private Object target; //目標類
    private Transaction transcation;//事務
    public MyInterceptor(Object target, Transaction transcation) {
        super();
        this.target = target;
        this.transcation = transcation;
    }
    /*產生代理物件*/
    public Object createProxy
 
() {
        //程式碼增強類
        Enhancer enhancer = new Enhancer();
        enhancer.setCallback(this);//引數為攔截器
        enhancer.setSuperclass(target.getClass());//生成的代理類的父類是目標類
        return enhancer.create();
    }
    @Override
    public Object intercept(Object obj, Method method, Object[] arg2, MethodProxy arg3) throws Throwable {
        // TODO Auto-generated method stub
        this.transcation.beginTransaction();
        Object result =  method.invoke(target, arg2);
        this.transcation.commit();
        return result;
    }

測試類：

public class CglibProxyText {


    public void textCglib() {
        Object target = new PersonDaoImpl();
        Transaction transcation = new Transaction();
        MyInterceptor interceptor = new MyInterceptor(target, transcation);
        PersonDaoImpl personDaoImpl = (PersonDaoImpl) interceptor.createProxy();
        personDaoImpl.savePerson();
    }
    public static void main(String[] args) {
        CglibProxyText text = new CglibProxyText();
        text.textCglib();
    }
}

這裡要注意：通過cglib產生的代理物件，代理類是目標類的子類