package net.wendal.nutzbook.aop;
import org.nutz.aop.ClassAgent;
import org.nutz.aop.ClassDefiner;
import org.nutz.aop.DefaultClassDefiner;
import org.nutz.aop.InterceptorChain;
import org.nutz.aop.MethodInterceptor;
import org.nutz.aop.asm.AsmClassAgent;
import org.nutz.aop.matcher.MethodMatcherFactory;

public class UserAction { //被AOP的类,必须是public的非abstract类!
    
    /*将要被AOP的方法*/
    public boolean login(String username, String password) throws Throwable {
        if ("wendal".equals(username) && "qazwsxedc".equals(password)) {
            System.out.println("登陆成功");
            return true;
        }
        System.out.println("登陆失败");
        return false;
    }
    
    public static void main(String[] args) throws Throwable {
        //无AOP的时候
        UserAction ua = new UserAction(); //直接new,将按原本的流程执行
        ua.login("wendal", "qazwsxedc");

        System.out.println("-----------------------------------------------------");
        System.out.println("-----------------------------------------------------");
        
        ClassDefiner cd = DefaultClassDefiner.defaultOne();
        
        //有AOP的时候
        ClassAgent agent = new AsmClassAgent();
        LogInterceptor log = new LogInterceptor();
        agent.addInterceptor(MethodMatcherFactory.matcher("^login$"), log);
        //返回被AOP改造的Class实例
        Class<? extends UserAction> userAction2 = agent.define(cd, UserAction.class);
        UserAction action = userAction2.newInstance();
        action.login("wendal", "qazwsxedc");//通过日志,可以看到方法执行前后有额外的日志
    }
}

class LogInterceptor implements MethodInterceptor {
    public void filter(InterceptorChain chain) throws Throwable {
        System.out.println("方法即将执行 -->" + chain.getCallingMethod());
        chain.doChain();// 继续执行其他拦截器,如果没有,则执行原方法
        System.out.println("方法执行完毕 -->" + chain.getCallingMethod());
    }
}

登陆成功
-----------------------------------------------------
-----------------------------------------------------
方法即将执行 -->public boolean aop.UserAction.login(java.lang.String,java.lang.String) throws java.lang.Throwable
登陆成功
方法执行完毕 -->public boolean aop.UserAction.login(java.lang.String,java.lang.String) throws java.lang.Throwable

package net.wendal.nutzbook.aop;
import org.nutz.ioc.aop.Aop;
import org.nutz.ioc.loader.annotation.IocBean;

import org.nutz.ioc.loader.annotation.AnnotationIocLoader;
import org.nutz.ioc.Ioc;
import org.nutz.ioc.impl.NutIoc;

@IocBean
public class UserAction { //被AOP的类,必须是public的非abstract类!
    
    @Aop({"logInterceptor"}) //这里写拦截器bean的名字
    public boolean login(String username, String password) throws Throwable {
        if ("wendal".equals(username) && "qazwsxedc".equals(password)) {
            System.out.println("登陆成功");
            return true;
        }
        System.out.println("登陆失败");
        return false;
    }
    
    public static void main(String[] args) throws Throwable {
        Ioc ioc = new NutIoc(new AnnotationIocLoader("aop"));
        UserAction action = ioc.get(UserAction.class);
        action.login("wendal", "qazwsxedc");
    }
}
//另外一个类文件
package net.wendal.nutzbook.aop;
import org.nutz.ioc.loader.annotation.IocBean;
import org.nutz.aop.InterceptorChain;
import org.nutz.aop.MethodInterceptor;

@IocBean //声明为一个Ioc的bean,名字为logInterceptor
public class LogInterceptor implements MethodInterceptor {
    public void filter(InterceptorChain chain) throws Throwable {
        System.out.println("方法即将执行 -->" + chain.getCallingMethod());
        chain.doChain();// 继续执行其他拦截器
        System.out.println("方法执行完毕 -->" + chain.getCallingMethod());
    }
}