如何在不使用spring框架中使用aop的功能

目录

• spring提供了两种方式的AOP使用

• 使用xml配置方式
• 使用注解方式

• AspectJ的使用实例

• 第一种
• 第二种：通过面向接口编程实现日志输出
• 第三种：使用java的代理机制进行日志输出

public class TimeBook {undefined
 private Logger logger = Logger.getLogger(this.getClass().getName());
 //审核数据的相关程序
 public void doAuditing(String name){undefined
  logger.log(Level.INFO, name + "开始审核数据...");
  System.out.println("审核程序");
  logger.log(Level.INFO, name + "审核数据结束...");
 }
}
//TestHelloWorld.java
package com.gc.test;
import com.gc.action.TimeBook;
public class TestHelloWorld {undefined
 public static void main(String[] args){undefined
  TimeBook timeBook = new TimeBook();
  timeBook.doAuditing("张三");
 }
}

public class TimeBook implements TimeBookInterface {undefined
 //审核数据的相关程序
 public void doAuditing(String name){undefined
  System.out.println("审核程序");
 }
}
//TimeBookProxy.java
package com.gc.action;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import com.gc.impl.TimeBookInterface;
public class TimeBookProxy {undefined
 private Logger logger = Logger.getLogger(this.getClass().getName());
 private TimeBookInterface timeBookInterface;
 //在该类中针对前面的接口TimeBookInterface编程,而不是针对具体的类
 public TimeBookProxy(TimeBookInterface timeBookInterface){undefined
  this.timeBookInterface = timeBookInterface;
 }
 //实际业务处理
 public void doAuditing(String name){undefined
  logger.log(Level.INFO,"开始审核数据 "+name);
  timeBookInterface.doAuditing(name);
  logger.log(Level.INFO,"审核数据结束 "+name);
 }
}
public class TestHelloWorld {undefined
 public static void main(String[] args){undefined
  TimeBookProxy timeBookProxy = new TimeBookProxy(new TimeBook());
  timeBookProxy.doAuditing("张三");
 }
}

public class LogProxy implements InvocationHandler{undefined
 private Logger logger = Logger.getLogger(this.getClass().getName());
 private Object delegate;
 //绑定代理对象
 public Object bind(Object delegate){undefined
  this.delegate = delegate;
  return Proxy.newProxyInstance(delegate.getClass().getClassLoader(),
    delegate.getClass().getInterfaces(),this);
 }
 //针对接口编程
 public Object invoke(Object proxy,Method method,Object[] args) throws Throwable {undefined
  Object result = null;
  try{undefined
   //在方法调用前后进行日志输出
   logger.log(Level.INFO,args[0]+" 开始审核数据...");
   result = method.invoke(delegate, args);
   logger.log(Level.INFO,args[0]+" 审核数据结束...");
  }catch(Exception e){undefined
   logger.log(Level.INFO,e.toString());
  }
  return result;
 }
}
//TimeBookInterface.java
package com.gc.impl;
//针对接口编程
public interface TimeBookInterface {undefined
 public void doAuditing(String name);
}
//TimeBook.java
public class TimeBook implements TimeBookInterface {undefined
 //审核数据的相关程序
 public void doAuditing(String name){undefined
  System.out.println("审核程序");
 }
}
//TestHelloWorld.java
public class TestHelloWorld {undefined
 public static void main(String[] args){undefined
  //实现了对日志类的重用
  LogProxy logProxy = new LogProxy();
  TimeBookInterface timeBookProxy = (TimeBookInterface)logProxy.bind(new TimeBook());
  timeBookProxy.doAuditing("张三");
 }
}