userbusiness.java

开发工具为myeclipse,数据库为oracle

package com.stiven.business;

import java.util.List;
import java.util.Set;

import org.hibernate.Session;
import org.hibernate.Transaction;

import com.stiven.hibernate.Users;
import com.stiven.hibernate.UsersDAO;

public class UserBusiness {
	
	/**
	 * 返回实体代表有这个用户,并且密码正确;返回null,代表用户名或密码错误
	 * @param userName
	 * @param userPwd
	 * @return
	 */
	public  Users checkUser(String userName,String userPwd){
		UsersDAO dao=new UsersDAO();
		Users user=new Users();
		user.setUsername(userName);
		user.setUserpwd(userPwd);
		List list=dao.findByExample(user);
		if(list.size()>0){
			return (Users)list.get(0);
		}else{
			return null;
		}
	}
	
	/**
	 * 注册用户
	 * @param user
	 * @return
	 */
	public  boolean registerUser(Users user){
		UsersDAO dao=new UsersDAO();
		Session session=dao.getSession();
		try {
			Transaction tran=session.beginTransaction();
			dao.save(user);
			tran.commit();
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}
	
	
	/**
	 * 修改用户信息
	 * @param user
	 * @return
	 */
	public  boolean modifyUser(Users user){
		UsersDAO dao=new UsersDAO();
		Session session=dao.getSession();
		try {
			Transaction tran=session.beginTransaction();
			session.saveOrUpdate(user);
			tran.commit();
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}
	
	/**
	 * 根据用户查找博客条目
	 * @param user
	 * @return
	 */
	public  Set findBlogEntryByUser(Users user){
		return user.getBlogentries();
	}
}