用户注册-总结3(service层)

package com.du.service.impl;

import com.du.dao.impl.UserDaoImpl;
import com.du.domain.Users;
import com.du.exception.AddException;
import com.du.utils.ServiceUtils;

//要在服务对用户密码进行加密
public class BussinessServiceImpl  {

	// 注册
	public void add(Users user) throws AddException {

		//用重名返回true 否则返回false
		boolean b= new UserDaoImpl().find(user.getUsername());
		if(!b){
			user.setPassword(ServiceUtils.md5(user.getPassword()));
			new UserDaoImpl().add(user);
		}else{
			throw new AddException();
		}
	}



	// 登录,判断，密码是否正确
	public Users find(String username, String password) {

		String md5password=ServiceUtils.md5(password);
		
		return new UserDaoImpl().find(username, md5password);
	}
}

 注意：

1.dao层写好后，service层很好写