userinfoaroundadvice.java

hibernate项目实践

package com.px1987.webbbs.aop;
import com.px1987.webbbs.dao.*;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

import com.px1987.webbbs.model.UserInfoVO;
import com.px1987.webbbs.exception.*;
public class UserInfoAroundAdvice implements MethodInterceptor 
{
	UserManageDAOInterface userInfoManageDAOImpleBean=null;
	public UserInfoAroundAdvice() 
	{
		// TODO 自动生成构造函数存根
	}
	public Object invoke(MethodInvocation methodInvocation) throws Throwable 
	{
		Object methodArguments[]=methodInvocation.getArguments();
		UserInfoVO oneUserInfoVO=(UserInfoVO)methodArguments[0];
		String userName=oneUserInfoVO.getUserName();
		UserInfoPO oneUserInfoPO=userInfoManageDAOImpleBean.selectOneUserInfoByName(userName);
		if(oneUserInfoPO!=null)
		{
			throw new WebBBSException("您的用户已经在数据库表中存在了！请换另一个用户名称再次注册本系统");
		}
		Object result = methodInvocation.proceed();
		return result;
	}
	public void setUserInfoManageDAOImpleBean(
			UserManageDAOInterface userInfoManageDAOImpleBean) {
		this.userInfoManageDAOImpleBean = userInfoManageDAOImpleBean;
	}

}