HIbernate+struts2分页案例
package www.csdn.pr...
<pre name="code" class="html">package www.csdn.project.util;
import org.hibernate.Session;
/**
* Data access interface for domain model
* @author MyEclipse Persistence Tools
*/
public interface IBaseHibernateDAO {
public Session getSession();
}</pre><br>
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC"-//Hibernate/Hibernate Configuration DTD 3.0//EN""https://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory><property name="myeclipse.connection.profile">localhost</property><property
name="connection.url">jdbc:mysql://localhost:3306/bookstore</property><property name="connection.username">root</property><property name="connection.password">root</property><property name="connection.driver_class">com.mysql.jdbc.Driver</property><property
name="dialect">org.hibernate.dialect.MySQLDialect</property><property name="show_sql">true</property><mapping resource="www/csdn/project/domain/Admin.hbm.xml" /></session-factory></hibernate-configuration>
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<pre name="code" class="java">package www.csdn.project.dao;
import www.csdn.project.domain.Admin;
public interface AdminDAO extends BaseDAO<Admin, Integer> {
}</pre><br>
<pre name="code" class="java">package www.csdn.project.dao;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Query;
import www.csdn.project.domain.Admin;
import www.csdn.project.util.BaseHibernateDAO;
import www.csdn.project.util.HiberSessionFactory;
public class AdminDAOImpl extends BaseHibernateDAO implements AdminDAO {
public Integer getCountRecord() {
int i = 0;
try {
Query query = this.getSession().createQuery(
"select count(admin) from Admin admin");
/*
* Long l = (Long) query.uniqueResult(); int i =
* Integer.parseInt(l.toString());
*/
i = Integer.parseInt(query.uniqueResult().toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
HiberSessionFactory.closeSession();
}
return i;
}
public List<Admin> getNowPageInfo(Integer nowpage) {
List<Admin> entities = new ArrayList<Admin>();
try {
entities = this.getSession().createQuery("from Admin")
.setFirstResult((nowpage - 1) * PAGESIZE).setMaxResults(
PAGESIZE).list();
} catch (Exception e) {
e.printStackTrace();
} finally {
HiberSessionFactory.closeSession();
}
return entities;
}
/*public Integer getCountRecord(Class className){
int i=0;
try {
i = this.getSession().createCriteria(className).list().size();
} catch (Exception e) {
e.printStackTrace();
} finally {
HiberSessionFactory.closeSession();
}
return 0;
}*/
public Integer getCountRecord(Class<Admin> className) {
int i = 0;
try {
Query query = this.getSession().createQuery(
"select count(c) from "+className.getName()+" c");
/*
* Long l = (Long) query.uniqueResult(); int i =
* Integer.parseInt(l.toString());
*/
i = Integer.parseInt(query.uniqueResult().toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
HiberSessionFactory.closeSession();
}
return i;
}
public List<Admin> getNowPageInfo(Integer nowpage, Class<Admin> className) {
List<Admin> entities = new ArrayList<Admin>();
try {
entities = this.getSession().createCriteria(className).setFirstResult(
(nowpage - 1) * PAGESIZE).setMaxResults(PAGESIZE).list();
} catch (Exception e) {
e.printStackTrace();
} finally {
HiberSessionFactory.closeSession();
}
return entities;
}
}
</pre><br>
<pre name="code" class="java">package www.csdn.project.dao;
import java.util.List;
public interface BaseDAO<T, PK> {
// 每页显示的记录数
public static final Integer PAGESIZE = 2;
/**
* 查询总记录数
*
* @return
*/
public Integer getCountRecord(Class<T> className);
/**
* 查询当前页信息
*
* @param nowpage
* @param entity
* @return
*/
public List<T> getNowPageInfo(Integer nowpage,Class<T> className);
}
</pre><br>
<pre name="code" class="java">package www.csdn.project.dao;
import www.csdn.project.domain.Admin;
public class Test {
public static void main(String[] args) {
Admin entity = new Admin();
System.out.println(entity.getClass());
}
}
</pre><br>
<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"https://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="www.csdn.project.domain.Admin" table="admin" catalog="bookstore">
<id name="adminId" type="java.lang.Integer">
<column name="adminId" />
<generator class="identity" />
</id>
<property name="adminName" type="java.lang.String">
<column name="adminName" length="20" not-null="true" unique="true" />
</property>
<property name="adminPassword" type="java.lang.String">
<column name="adminPassword" length="10" not-null="true" />
</property>
<property name="adminEmail" type="java.lang.String">
<column name="adminEmail" length="30" />
</property>
</class>
</hibernate-mapping>
</pre><br>
<pre name="code" class="java">package www.csdn.project.domain;
/**
* Admin entity. @author MyEclipse Persistence Tools
*/
public class Admin implements java.io.Serializable {
// Fields
private Integer adminId;
private String adminName;
private String adminPassword;
private String adminEmail;
// Constructors
/** default constructor */
public Admin() {
}
/** minimal constructor */
public Admin(String adminName, String adminPassword) {
this.adminName = adminName;
this.adminPassword = adminPassword;
}
/** full constructor */
public Admin(String adminName, String adminPassword, String adminEmail) {
this.adminName = adminName;
this.adminPassword = adminPassword;
this.adminEmail = adminEmail;
}
// Property accessors
public Integer getAdminId() {
return this.adminId;
}
public void setAdminId(Integer adminId) {
this.adminId = adminId;
}
public String getAdminName() {
return this.adminName;
}
public void setAdminName(String adminName) {
this.adminName = adminName;
}
public String getAdminPassword() {
return this.adminPassword;
}
public void setAdminPassword(String adminPassword) {
this.adminPassword = adminPassword;
}
public String getAdminEmail() {
return this.adminEmail;
}
public void setAdminEmail(String adminEmail) {
this.adminEmail = adminEmail;
}
@Override
public String toString() {
return "Admin [adminEmail=" + adminEmail + ", adminId=" + adminId
+ ", adminName=" + adminName + ", adminPassword="
+ adminPassword + "]";
}
}</pre><br>
<pre name="code" class="java">package www.csdn.project.service;
import java.util.List;
public interface BaseService<T,PK> {
/**
* 查询所有实体对象
*
* @param entityClass
* @return
*/
public List<T> getAllObjects(Class<T> entityClass);
/**
* 根据id查询实体对象
* @param entityClass
* @param id
* @return
*/
public T getObjectById(Class<T> entityClass,PK id);
/**
* 根据id查询实体对象
* @param entityClass
* @param id
* @return
*/
public T loadObjectById(Class<T> entityClass, PK id);
/**
* 保存实体对象
* @param entity
*/
public void saveObject(T entity);
/**
* 删除实体操作
* @param entity
*/
public void deleteObject(T entity);
/**
* 根据id删除实体对象
* @param id
*/
public void deleteObjectById(PK id);
/**
* 更新实体操作
*
* @param entity
*/
public void updateObject(T entity);
}
</pre><br>
测试类
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<pre name="code" class="java">package www.csdn.project.test;
import java.util.List;
import org.junit.Test;
import www.csdn.project.dao.AdminDAO;
import www.csdn.project.dao.AdminDAOImpl;
import www.csdn.project.domain.Admin;
import www.csdn.project.util.Pagination;
public class AdminTest {
@Test
public void test(){
//查询Admin User Good
Pagination<Admin> pagination = new Pagination<Admin>(Admin.class,1);
System.out.println(pagination.getCountRecond());
System.out.println(pagination.getCountPage());
System.out.println(pagination.getNowPage());
List<Admin> entities = pagination.getEntities();
for(Admin entity:entities){
System.out.println(entity.toString());
}
}
}
</pre><br>
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<pre name="code" class="java">package www.csdn.project.util;
import org.hibernate.Session;
/**
* Data access object (DAO) for domain model
* @author MyEclipse Persistence Tools
*/
public class BaseHibernateDAO implements IBaseHibernateDAO {
public Session getSession() {
return HiberSessionFactory.getSession();
}
}</pre><pre name="code" class="java">package www.csdn.project.util;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
/**
* Configures and provides access to Hibernate sessions, tied to the
* current thread of execution. Follows the Thread Local Session
* pattern, see {@link https://hibernate.org/42.html }.
*/
public class HiberSessionFactory {
/**
* Location of hibernate.cfg.xml file.
* Location should be on the classpath as Hibernate uses
* #resourceAsStream style lookup for its configuration file.
* The default classpath location of the hibernate config file is
* in the default package. Use #setConfigFile() to update
* the location of the configuration file for the current session.
*/
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
static {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err
.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
private HiberSessionFactory() {
}
/**
* Returns the ThreadLocal Session instance. Lazy initialize
* the <code>SessionFactory</code> if needed.
*
* @return Session
* @throws HibernateException
*/
public static Session getSession() throws HibernateException {
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) {
if (sessionFactory == null) {
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession()
: null;
threadLocal.set(session);
}
return session;
}
/**
* Rebuild hibernate session factory
*
*/
public static void rebuildSessionFactory() {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err
.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
/**
* Close the single hibernate session instance.
*
* @throws HibernateException
*/
public static void closeSession() throws HibernateException {
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) {
session.close();
}
}
/**
* return session factory
*
*/
public static org.hibernate.SessionFactory getSessionFactory() {
return sessionFactory;
}
/**
* return session factory
*
* session factory will be rebuilded in the next call
*/
public static void setConfigFile(String configFile) {
HiberSessionFactory.configFile = configFile;
sessionFactory = null;
}
/**
* return hibernate configuration
*
*/
public static Configuration getConfiguration() {
return configuration;
}
}</pre><br>
<pre name="code" class="java">package www.csdn.project.util;
import java.util.ArrayList;
import java.util.List;
/**
*
* @author Zhangguoliang
* 写 牛掰的分页（通用）
*
* @param <T>
*/
public class Pagination<T> extends BaseHibernateDAO {
// 每页显示的记录数
private static final Integer PAGESIZE = 2;
// 总页数
private Integer countPage;
// 当前页
private Integer nowPage;
// 总记录数
private Integer countRecond;
// 当前页数据
private List<T> entities;
public Pagination(Class<T> className, int nowPage) {
this.countRecond = getCountRecord(className);
this.nowPage = nowPage;
this.countPage = this.countRecond % PAGESIZE == 0 ? this.countRecond
/ PAGESIZE : this.countRecond /PAGESIZE + 1;
this.entities = getNowPageInfo(this.nowPage, className);
}
public Integer getCountPage() {
return countPage;
}
public void setCountPage(Integer countPage) {
this.countPage = countPage;
}
public Integer getNowPage() {
return nowPage;
}
public void setNowPage(Integer nowPage) {
this.nowPage = nowPage;
}
public Integer getCountRecond() {
return countRecond;
}
public void setCountRecond(Integer countRecond) {
this.countRecond = countRecond;
}
public List<T> getEntities() {
return entities;
}
public void setEntities(List<T> entities) {
this.entities = entities;
}
public Integer getCountRecord(Class<T> className) {
int i = 0;
try {
i = Integer.parseInt(this.getSession().createQuery(
"select count(c) from " + className.getName() + " c")
.uniqueResult().toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
HiberSessionFactory.closeSession();
}
return i;
}
@SuppressWarnings("unchecked")
public List<T> getNowPageInfo(Integer nowpage, Class<T> className) {
List<T> entities = new ArrayList<T>();
try {
entities = this.getSession().createCriteria(className)
.setFirstResult((nowpage - 1) * PAGESIZE).setMaxResults(
PAGESIZE).list();
} catch (Exception e) {
e.printStackTrace();
} finally { www.2cto.com
HiberSessionFactory.closeSession();
}
return entities;
}
}
</pre><br>
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