notedaoimpl.java

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package org.lxh.struts.note.impl;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.lxh.struts.note.dao.NoteDAO;
import org.lxh.struts.note.vo.Note;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

public class NoteDAOImpl extends HibernateDaoSupport implements NoteDAO {
	// 增加操作
	public void insert(Note note) throws Exception {
		super.getSession().save(note);
		super.getSession().beginTransaction().commit();
	}

	// 修改操作
	public void update(Note note) throws Exception {
		String hql = "UPDATE Note SET title=?,author=?,content=? WHERE id=?" ;
		Query q = super.getSession().createQuery(hql) ;
		q.setString(0, note.getTitle()) ;
		q.setString(1, note.getAuthor()) ;
		q.setString(2, note.getContent()) ;
		q.setInteger(3, note.getId()) ;
		q.executeUpdate() ;
		super.getSession().beginTransaction().commit();
	}

	// 删除操作
	public void delete(int id) throws Exception {
		String hql = "DELETE FROM Note WHERE id=?";
		Query q = super.getSession().createQuery(hql);
		q.setInteger(0, id);
		q.executeUpdate();
		super.getSession().beginTransaction().commit();
	}

	// 按ID查询，主要为更新使用
	public Note queryById(int id) throws Exception {
		Note note = null;
		String hql = "FROM Note AS n WHERE n.id=?";
		Query q = super.getSession().createQuery(hql);
		q.setInteger(0, id);
		List all = q.list();
		if (all.size() > 0) {
			note = (Note) all.get(0);
		}
		return note;
	}

	// 查询全部
	public List queryAll() throws Exception {
		List all = null;
		String hql = "FROM Note AS n";
		all = super.getSession().createQuery(hql).list();
		return all;
	}

	// 模糊查询
	public List queryByLike(String cond) throws Exception {
		List all = null;
		String hql = "FROM Note AS n WHERE n.title LIKE ? OR n.author LIKE ? OR n.content LIKE ?";
		Query q = super.getSession().createQuery(hql);
		q.setString(0, "%" + cond + "%");
		q.setString(1, "%" + cond + "%");
		q.setString(2, "%" + cond + "%");
		all = q.list();
		return all;
	}
};