hibernate操作数据库代码,Java代码库,德仔网

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【Java】 hibernate操作数据库
作者:weinee / 发布于2015/5/19/ 452

	package com.coco.util.hibernate;
	
	import java.beans.PropertyDescriptor;
	import java.io.Serializable;
	import java.lang.reflect.ParameterizedType;
	import java.util.List;
	
	import javax.annotation.Resource;
	
	import org.apache.logging.log4j.Logger;
	import org.hibernate.Query;
	import org.hibernate.Session;
	import org.hibernate.SessionFactory;
	import org.springframework.stereotype.Repository;
	
	import com.coco.helper.Helper;
	import com.coco.logging.log4j.LoggerHelper;
	import com.coco.util.pager.Pager;
	import com.coco.util.pager.PagerDialect;
	
	/**
	*
	* @param <E>
	*/
	@Repository
	public class SpringHibernateDaoSupport<E> implements HibernateDao {
	
	 protected final Logger logger = LoggerHelper.getLogger(getClass());
	
	 public SpringHibernateDaoSupport() {
	 super();
	 getEntityClass();
	 }
	
	
	 @Resource
	 private SessionFactory sessionFactory;
	
	 @Resource(name = "oraclePagerDialect")
	 private PagerDialect pagerDialect;
	
	 private Class<E> entityClass;
	
	
	 @SuppressWarnings("unchecked")
	 public Class<E> getEntityClass() {
	 if (entityClass == null && !SpringHibernateDaoSupport.class.equals(this.getClass())) {
	
	 entityClass = (Class<E>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
	 }
	 return entityClass;
	 }
	
	 public PagerDialect getPagerDialect() {
	 return pagerDialect;
	 }
	
	 public void setPagerDialect(PagerDialect pagerDialect) {
	 this.pagerDialect = pagerDialect;
	 }
	
	 public SessionFactory getSessionFactory() {
	 return sessionFactory;
	 }
	
	 public void setSessionFactory(SessionFactory sessionFactory) {
	 this.sessionFactory = sessionFactory;
	 }
	
	 @Override
	 public Session getSession() {
	 return sessionFactory.getCurrentSession();
	 }
	
	
	 @SuppressWarnings("unchecked")
	 public E get(Serializable id) {
	 return (E) getSession().get(getEntityClass(), id);
	 }
	
	
	 @SuppressWarnings("unchecked")
	 public <T> T get(Class<T> entityClass, Serializable id) {
	 return (T) getSession().get(entityClass, id);
	 }
	
	
	 public Serializable save(Object entity) {
	 Session s=getSession();
	 return s.save(entity);
	 }
	
	
	 public void update(Object entity) {
	 getSession().update(entity);
	 }
	
	
	 public void delete(Object entity) {
	 getSession().delete(entity);
	 }
	
	
	 public <T> void delete(Class<T> entityClass, Serializable id) {
	 PropertyDescriptor pd = Helper.getPropertyDescriptor(entityClass, "id");
	 if (pd == null) {
	
	 getSession().delete(get(entityClass, id));
	 } else {
	
	 String hql = "DELETE FROM " + entityClass.getName() + " WHERE id = ?";
	 execute(hql, id);
	 }
	 }
	
	
	 public Query createQuery(String hql, Object... parameters) {
	 Query query = getSession().createQuery(hql);
	 if (parameters != null) {
	 int l = parameters.length;
	 for (int i = 0; i < l; i++) {
	 query.setParameter(i, parameters[i]);
	 }
	 }
	 return query;
	 }
	
	
	 public Query createSQLQuery(String sql, Object... parameters) {
	 Query query = getSession().createSQLQuery(sql);
	 if (parameters != null) {
	 int l = parameters.length;
	 for (int i = 0; i < l; i++) {
	 query.setParameter(i, parameters[i]);
	 }
	 }
	 return query;
	 }
	
	
	 public int execute(String hql, Object... parameters) {
	 Query query = this.createQuery(hql, parameters);
	 return query.executeUpdate();
	 }
	
	
	 public int executeSQL(String sql, Object... parameters) {
	 Query query = this.createSQLQuery(sql, parameters);
	 return query.executeUpdate();
	 }
	
	
	 public List<?> query(String hql, Object... parameters) {
	 Query query = this.createQuery(hql, parameters);
	 return query.list();
	 }
	
	
	 public List<?> querySQL(String sql, Object... parameters) {
	 Query query = this.createSQLQuery(sql, parameters);
	 return query.list();
	 }
	
	
	 public Object uniqueResult(String hql, Object... parameters) {
	 Query query = this.createQuery(hql, parameters);
	 return query.uniqueResult();
	 }
	
	
	 public Object uniqueResultSQL(String sql, Object... parameters) {
	 Query query = this.createSQLQuery(sql, parameters);
	 return query.uniqueResult();
	 }
	
	
	 public Pager query(Pager pager, String hql, Object... parameters) {
	 return pagerDialect.query(getSession(), pager, hql, parameters);
	 }
	
	
	 public Pager query(String hql, int pageIndex, int maxResults, Object... parameters) {
	 Pager pager = new Pager(pageIndex, maxResults);
	 return this.query(pager, hql, parameters);
	 }
	
	
	 public Pager querySQL(Pager pager, String sql, Object... parameters) {
	 return pagerDialect.querySQL(getSession(), pager, sql, parameters);
	 }
	
	
	 public Pager querySQL(String sql, int pageIndex, int maxResults, Object... parameters) {
	 Pager pager = new Pager(pageIndex, maxResults);
	 return this.querySQL(pager, sql, parameters);
	 }
	
	}

	

	package com.sinosoft.oa.dao;
	
	import org.springframework.stereotype.Repository;
	
	import com.sinosoft.oa.entity.Login;
	import com.sinosoft.util.hibernate.SpringHibernateDaoSupport;
	
	/**
	* Login实体的数据库操作DAO类
	*/
	@Repository
	public class LoginDAO extends SpringHibernateDaoSupport<Login> {
	
	 /**
	 * 通过用户名查找登录对象
	 * @param username
	 * @return
	 */
	 public Login findLogin(String username){
	 return (Login)uniqueResult("from Login where username = ?", username);
	 }
	
	 /**
	 * 通过用户名保存对象
	 * @param username
	 * @return
	 */
	 public Login saveLogin(String username, String password){
	 Login login = new Login(username, password);
	 this.save(login);
	 return login;
	 }
	}
	3. [代码]Pager
	?
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	package com.coco.util.pager;
	
	import java.io.Serializable;
	import java.util.List;
	
	/**
	* 分页
	*
	*/
	@SuppressWarnings("rawtypes")
	public class Pager implements Serializable {
	
	 private static final long serialVersionUID = 7208853976754703078L;
	
	 public Pager() {
	 super();
	 total = -1;
	 }
	
	 public Pager(int pageIndex, int maxResults) {
	 super();
	 this.pageIndex = pageIndex;
	 this.maxResults = maxResults;
	 }
	
	 private List list;
	
	 /** 当前页显示的数量,等于list.size */
	 private int size;
	
	 /** 总记录的条数*/
	 private int total = -1;
	
	 /**
	 * 当前页序号
	 */
	 private int pageIndex;
	
	 /** 总页数 */
	 private int pageCount;
	
	 /** 每页最大记录 */
	 private int maxResults;
	
	 public List list() {
	 return list;
	 }
	
	 public int size() {
	 return size;
	 }
	
	 public int total() {
	 return total;
	 }
	
	 public List getList() {
	 return list;
	 }
	
	 public void setList(List list) {
	 this.list = list;
	 this.size = list == null ? 0 : list.size();
	 }
	
	 public int getSize() {
	 return size;
	 }
	
	 public void setSize(int size) {
	 this.size = size;
	 }
	
	 /**
	 *
	 * @return
	 * @see #total()
	 */
	 public int getTotal() {
	 return total;
	 }
	
	 /**
	 *
	 * @param total
	 */
	 public void setTotal(int total) {
	 this.total = total;
	 pageCount = (int) Math.ceil((double) total / (double) maxResults);
	 pageIndex = Math.min(pageIndex, pageCount);
	 }
	
	 public int getPageIndex() {
	 return pageIndex;
	 }
	
	 public void setPageIndex(int pageIndex) {
	 this.pageIndex = pageIndex;
	 }
	
	 public int getPageCount() {
	 return pageCount;
	 }
	
	 public void setPageCount(int pageCount) {
	 this.pageCount = pageCount;
	 }
	
	 public int getMaxResults() {
	 return maxResults;
	 }
	
	 public void setMaxResults(int maxResults) {
	 this.maxResults = maxResults;
	 }
	
	 /**
	 *
	 * @return
	 */
	 public int getFirstResult() {
	 return (pageIndex - 1) * maxResults;
	 }
	
	}
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