JavaWeb项目开发案例精粹-第4章博客网站系统-003Dao层

1.

 package com.sanqing.dao;

 import java.util.List;

 import com.sanqing.fenye.Page;
 import com.sanqing.po.Article;

 public interface ArticleDAO {
     //定义一个add方法，用来保存博客文章
     public void add(Article article);

     //定义一个queryUserAll,用来取出用户的所有文章
     public List<Article> queryUserAll(String username);

     //获得用户文章总记录数
     public int queryUserAllCount(String username);

     //按分页信息查询用户的记录
     public List<Article> queryByPage(String username,Page page);

     //获得所有文章的总记录数
     public int queryAllCount();

     //按分页信息查询记录
     public List<Article> queryAllByPage(Page page);

     //按ID查询文章
     public Article queryById(int id);
 }

2.

 package com.sanqing.dao;

 import java.sql.SQLException;
 import java.util.List;

 import org.hibernate.HibernateException;
 import org.hibernate.Query;
 import org.hibernate.Session;
 import org.springframework.orm.hibernate3.HibernateCallback;
 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

 import com.sanqing.fenye.Page;
 import com.sanqing.po.Article;

 public class ArticleDAOImpl extends HibernateDaoSupport implements ArticleDAO {

     //实现add方法
     public void add(Article article) {
         this.getHibernateTemplate().saveOrUpdate(article);
     }

     public List<Article> queryUserAll(String username) {
         List find = this.getHibernateTemplate().find("select art from Article art where art.username = ?", username);
         List<Article> list = find;
         return list;
     }

     public int queryUserAllCount(String username) {
         List find = this.getHibernateTemplate().find("select count(*) from Article art where art.username = ?",username);
         return ((Long)find.get(0)).intValue();
     }

     public List<Article> queryByPage(final String username, final Page page) {
         return this.getHibernateTemplate().executeFind(new HibernateCallback() {
             public Object doInHibernate(Session session)
                     throws HibernateException, SQLException {
                 Query query = session.createQuery("select art from Article art where art.username = ?");
                 //设置参数
                 query.setParameter(0, username);
                 //设置每页显示多少个，设置多大结果。
                 query.setMaxResults(page.getEveryPage());
                 //设置起点
                 query.setFirstResult(page.getBeginIndex());
                 return query.list();
             }

         });
     }

     public List<Article> queryAllByPage(final Page page) {
         return this.getHibernateTemplate().executeFind(new HibernateCallback() {
             public Object doInHibernate(Session session)
                     throws HibernateException, SQLException {
                 Query query = session.createQuery("select art from Article art order by art.date desc");
                 //设置每页显示多少个，设置多大结果。
                 query.setMaxResults(page.getEveryPage());
                 //设置起点
                 query.setFirstResult(page.getBeginIndex());
                 return query.list();
             }

         });
     }

     public int queryAllCount() {
         List find = this.getHibernateTemplate().find("select count(*) from Article art");
         return ((Long)find.get(0)).intValue();
     }

     public Article queryById(int id) {
         List find = this.getHibernateTemplate().find("select art from Article art where art.id = ?", id);
         return (Article) find.get(0);
     }

 }

3.

 package com.sanqing.dao;

 import com.sanqing.po.BlogInfo;

 public interface BlogInfoDAO {
     //设置个性化内容
     public void save(BlogInfo info);
     //获得
     public BlogInfo get(String username);
 }

4.

 package com.sanqing.dao;

 import java.util.List;

 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

 import com.sanqing.po.BlogInfo;

 public class BlogInfoDAOImpl extends HibernateDaoSupport implements BlogInfoDAO{

     public BlogInfo get(String username) {
         List list = this.getHibernateTemplate().find("select bloginfo from BlogInfo bloginfo where bloginfo.username=?", username);
         if(list.size() == 0) {
             return null;
         } else {
             return (BlogInfo) list.get(0);
         }
     }

     public void save(BlogInfo info) {
         this.getHibernateTemplate().saveOrUpdate(info);
     }

 }

5.

 package com.sanqing.dao;

 import java.util.List;

 import com.sanqing.fenye.Page;
 import com.sanqing.po.Critique;

 public interface CritiqueDAO {
     //添加评论
     public void addCritique(Critique critique);

     //获得指定文章的评论数
     public int queryCritiqueCount(int AId);

     //根据Page来查询指定文章的评论
     public List<Critique> queryByPage(int AId,Page page);
 }

6.

 package com.sanqing.dao;

 import java.sql.SQLException;
 import java.util.List;

 import org.hibernate.HibernateException;
 import org.hibernate.Query;
 import org.hibernate.Session;
 import org.springframework.orm.hibernate3.HibernateCallback;
 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

 import com.sanqing.fenye.Page;
 import com.sanqing.po.Critique;

 public class CritiqueDAOImpl extends HibernateDaoSupport implements CritiqueDAO {

     public void addCritique(Critique critique) {
         this.getHibernateTemplate().save(critique);
     }

     public List<Critique> queryByPage(final int AId, final Page page) {
         return this.getHibernateTemplate().executeFind(new HibernateCallback() {
             public Object doInHibernate(Session session)
                     throws HibernateException, SQLException {
                 Query query = session.createQuery("select cri from Critique cri where cri.AId = ?");
                 query.setParameter(0, AId);
                 //设置每页显示多少个，设置多大结果。
                 query.setMaxResults(page.getEveryPage());
                 //设置起点
                 query.setFirstResult(page.getBeginIndex());
                 return query.list();
             }

         });
     }

     public int queryCritiqueCount(int AId) {
         List find = this.getHibernateTemplate().find("select count(*) from Critique cri where cri.AId = ?",AId);
         return ((Long)find.get(0)).intValue();
     }

 }

7.

 package com.sanqing.dao;

 import java.util.Date;
 import java.util.List;

 import com.sanqing.po.Dianjiliang;

 public interface DianjiliangDAO {

     //返回该文章，该IP，该时间的访问记录
     public List queryByAId(int AId,String IP,Date time);

     //添加访问记录
     public void addJilu(Dianjiliang dianjiliang);
 }

8.

 package com.sanqing.dao;

 import java.sql.SQLException;
 import java.util.Date;
 import java.util.List;

 import org.hibernate.HibernateException;
 import org.hibernate.Query;
 import org.hibernate.Session;
 import org.springframework.orm.hibernate3.HibernateCallback;
 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

 import com.sanqing.po.Dianjiliang;

 public class DianjiliangDAOImpl extends HibernateDaoSupport implements
         DianjiliangDAO {

     public void addJilu(Dianjiliang dianjiliang) {
         this.getHibernateTemplate().save(dianjiliang);
     }

     public List queryByAId(final int AId, final String IP, final Date time) {
         return this.getHibernateTemplate().executeFind(new HibernateCallback() {
             public Object doInHibernate(Session session)
                     throws HibernateException, SQLException {
                 Query query = session.createQuery("select djl from Dianjiliang djl where djl.AId = ? and djl.ip = ? and djl.time = ?");
                 //设置参数
                 query.setParameter(0, AId);
                 query.setParameter(1, IP);
                 query.setParameter(2, time);
                 return query.list();
             }

         });
     }

 }

9.

 package com.sanqing.dao;

 import java.util.List;

 import com.sanqing.po.User;

 public interface UserDAO {
     //添加用户
     public void add(User user);

     //删除用户
     public void delete(User user);

     //更新用户
     public void update(User user);

     //查询所有用户
     public List queryAll();

     //按id查询用户
     public User queryByID(String username);
 }

10.

 package com.sanqing.dao;

 import java.util.List;

 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

 import com.sanqing.po.User;

 public class UserDAOImpl extends HibernateDaoSupport implements UserDAO {

     public void add(User user) {
         this.getHibernateTemplate().save(user);
     }

     public void delete(User user) {

     }

     public List queryAll() {
         return null;
     }

     public User queryByID(String username) {
         List list = this.getHibernateTemplate().find("select user from User user where user.username = '" + username + "'");

         if(list.size() == 0) {
             return null;
         } else {
             return (User)list.get(0);
         }
     }

     public void update(User user) {

     }

 }