SSH的一个BaseDao继承HibernateDaoSupport(一)
来源：互联网 发布：java多线程异步处理 编辑：程序博客网 时间：2024/05/29 17:54
自己在尝试整合SSH的时候,突然发现无法对dao的大部分功能做集成.尝试过将子类的类型在basedao的构造中传入,但是仍有部分问题不能很好的解决.mexican_jacky对我的启发很大,这种时候用泛型来处理类型问题再合适不过了.以下部分是引用mexican_jacky老兄的原文,其实还可以再简化或者处理一下,而且代码这种问题好像永远都没有最简的,留给各位在不同的工程中,自己动过脑子来修改的basedao,
import java.io.Serializable;import java.sql.SQLException;import java.util.Arrays;import java.util.List;import org.books.dao.BaseDao;import org.hibernate.Criteria;import org.hibernate.HibernateException;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.criterion.Criterion;import org.hibernate.criterion.Example;import org.hibernate.criterion.Order;import org.hibernate.criterion.Projection;import org.hibernate.criterion.Projections;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import org.springframework.orm.hibernate3.HibernateCallback;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;@SuppressWarnings("unchecked")/** * T extends Serializable T其实就是一个占位符, 你也可以换成其它字母,但作为惯例 当我们需要一种类型时,我们都T来占位,表示Type , * 后面的extends Serializable 表示在实际应用过程中,替换T的类型必须实现Serializable接口. PK => Primary * Key */public class BaseDaoImpl<T extends Serializable, PK extends Serializable> extends HibernateDaoSupport implements BaseDao<T, PK>{ /*************************************************************************** * 新增 **************************************************************************/ /* (non-Javadoc) * @see org.books.dao.BaseDao#save(T) */ public Serializable save(T entity) { return super.getHibernateTemplate().save(entity); } /*************************************************************************** * 更新 **************************************************************************/ /* (non-Javadoc) * @see org.books.dao.BaseDao#update(T) */ public void update(T t) { super.getHibernateTemplate().update(t); } /* (non-Javadoc) * @see org.books.dao.BaseDao#update(java.lang.String, java.lang.Object[]) */ public void update(final String hql, final Object[] params) { // 使用回调接口完成操作 super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Query query = session.createQuery(hql); System.out.println(hql); for (int i = 0; i < params.length; i++) { query.setParameter(i, params[i]); } query.executeUpdate(); return null; } }); } /* (non-Javadoc) * @see org.books.dao.BaseDao#update(java.lang.Class, java.lang.String, java.lang.Object, java.lang.String, java.lang.Object) */ public void update(Class<T> entityClass,String pkName,Object pkValue,String propName,Object propValue){ this.update(entityClass, pkName, pkValue, new String[]{propName}, new Object[]{propValue}); } /* (non-Javadoc) * @see org.books.dao.BaseDao#update(java.lang.Class, java.lang.String, java.lang.Object, java.lang.String[], java.lang.Object[]) */ public void update(Class<T> entityClass,String pkName,Object pkValue,String[] propNames,Object[] propValues){ if (!(propNames!=null&&propValues!=null&&propNames.length==propValues.length&&propNames.length>0)) { throw new RuntimeException("请确保提供的参数是正确的!属性名称的个数与属性值的个数必须一致!必须提供至少一个属性名称!"); } String entityName = entityClass.getName(); if (entityName.lastIndexOf(".")!=-1) { entityName = entityName.substring(entityName.lastIndexOf(".")+1); } String hql = "update "+entityName+" obj set "; for (int i = 0; i < propValues.length; i++) { hql += "obj."+propNames[i]+" =? and "; } if (hql.lastIndexOf("and")!=-1) { hql = hql .substring(0,hql.lastIndexOf("and")); } hql += " where obj."+pkName+" = ?"; Object[] ps = new Object[propValues.length+1]; for (int i = 0; i < propValues.length; i++) { ps[i] = propValues[i]; } ps[ps.length-1] = pkValue; this.update(hql,ps); } /* (non-Javadoc) * @see org.books.dao.BaseDao#saveorupdate(T) */ public void saveorupdate(T entity) { super.getHibernateTemplate().saveOrUpdate(entity); } /*************************************************************************** * 删除 **************************************************************************/ /* (non-Javadoc) * @see org.books.dao.BaseDao#delete(T) */ public void delete(T entity) { super.getHibernateTemplate().delete(entity); } /* (non-Javadoc) * @see org.books.dao.BaseDao#deleteById(java.lang.Class, PK) */ public void deleteById(Class<T> entityClass, PK id) { super.getHibernateTemplate().delete(this.findEnityById(entityClass, id)); } /* (non-Javadoc) * @see org.books.dao.BaseDao#deleteByProperty(java.lang.Class, java.lang.String, java.lang.Object) */ public void deleteByProperty(final Class<T> entityClass,final String propName,final Object propValue){ this.deleteByProperty(entityClass, new String[]{propName}, new Object[]{propValue}); } /* (non-Javadoc) * @see org.books.dao.BaseDao#deleteByProperty(java.lang.Class, java.lang.String[], java.lang.Object[]) */ public void deleteByProperty(final Class<T> entityClass,final String[] propNames,final Object[] propValues){ if (!(propNames!=null&&propValues!=null&&propNames.length==propValues.length&&propNames.length>0)) { throw new RuntimeException("请确保提供的参数是正确的!属性名称的个数与属性值的个数必须一致!必须提供至少一个属性名称!"); } String entityName = entityClass.getName(); if (entityName.lastIndexOf(".")!=-1) { entityName = entityName.substring(entityName.lastIndexOf(".")+1); } String hql = "delete from "+entityName+" obj where "; for (int i = 0; i < propNames.length; i++) { hql += " obj."+propNames[i]+" = ? and "; } if (hql.lastIndexOf("and")!=-1) { hql = hql .substring(0,hql.lastIndexOf("and")); } this.update(hql, propValues); } /*************************************************************************** * 查询 **************************************************************************/ /* (non-Javadoc) * @see org.books.dao.BaseDao#findEnityById(java.lang.Class, PK) */ public T findEnityById(Class<T> entityClass, PK id) { return (T) super.getHibernateTemplate().get(entityClass, id); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAll(java.lang.Class) */ public List<T> findAll(Class<T> entityClass) { return super.getHibernateTemplate().loadAll(entityClass); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllAsc(java.lang.Class, java.lang.String) */ public List<T> findAllAsc(Class<T> entityClass,String orderProperty) { return this.findAll_order(entityClass, orderProperty, "asc"); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllDesc(java.lang.Class, java.lang.String) */ public List<T> findAllDesc(Class<T> entityClass,String orderProperty) { return this.findAll_order(entityClass, orderProperty, "desc"); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAll_order(java.lang.Class, java.lang.String, java.lang.String) */ public List<T> findAll_order(Class<T> entityClass,String orderProperty,String orderType) { String hql = "from "+entityClass.getName()+" obj order by obj."+orderProperty+" "+orderType; return this.findAllByHQL(hql); } /* * 自定义排序 查询所有实体集合 * * @param entityClass * 实体类型信息 * @return 查询到的实体对象集合 */ /* (non-Javadoc) * @see org.books.dao.BaseDao#findAll_order(java.lang.Class, java.lang.String) */ public List<T> findAll_order(Class<T> entityClass,String orderDesc) { String hql = "from "+entityClass.getName()+" obj order by "+orderDesc; return this.findAllByHQL(hql); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByProperty(java.lang.Class, java.lang.String, java.lang.Object) */ public List<T> findAllByProperty(Class<T> entityClass, String propertyName, Object propertyValue) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + "=?"; return super.getHibernateTemplate().find(queryString, propertyValue); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByProperty_order(java.lang.Class, java.lang.String, java.lang.Object, java.lang.String) */ public List<T> findAllByProperty_order(Class<T> entityClass, String propertyName, Object propertyValue,String orderDesc) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + "=? order by "+orderDesc; return super.getHibernateTemplate().find(queryString, propertyValue); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByProperties(java.lang.Class, java.lang.String[], java.lang.Object[]) */ public List<T> findAllByProperties(Class<T> entityClass, String[] propertyNames, Object[] propertyValues) { if (!(propertyNames!=null&&propertyValues!=null&&propertyValues.length==propertyNames.length)) { throw new RuntimeException("请提供正确的参数值！propertyNames与propertyValues必须一一对应!"); } String queryString = "from " + entityClass.getName() + " as model where " ; for (int i = 0; i < propertyValues.length; i++) { queryString += " model."+propertyNames[i]+" = ? "; if(i != propertyValues.length-1){ queryString += " and "; } } return this.findAllByHQL(queryString, propertyValues); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByProperties_order(java.lang.Class, java.lang.String[], java.lang.Object[], java.lang.String) */ public List<T> findAllByProperties_order(Class<T> entityClass, String[] propertyNames, Object[] propertyValues,String orderDesc) { if (!(propertyNames!=null&&propertyValues!=null&&propertyValues.length==propertyNames.length)) { throw new RuntimeException("请提供正确的参数值！propertyNames与propertyValues必须一一对应!"); } String queryString = "from " + entityClass.getName() + " as model where " ; for (int i = 0; i < propertyValues.length; i++) { queryString += " model."+propertyNames[i]+" = ? "; if(i != propertyValues.length-1){ queryString += " and "; } } queryString += " order by "+orderDesc; return this.findAllByHQL(queryString, propertyValues); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByLikeProperty(java.lang.Class, java.lang.String, java.lang.String) */ public List<T> findAllByLikeProperty(Class<T> entityClass, String propertyName, String propertyValue) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + " like '%"+propertyValue+"%'"; return super.getHibernateTemplate().find(queryString); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByLikeProperty_order(java.lang.Class, java.lang.String, java.lang.String, java.lang.String) */ public List<T> findAllByLikeProperty_order(Class<T> entityClass, String propertyName, String propertyValue,String orderDesc) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + " like '%"+propertyValue+"%'"; return super.getHibernateTemplate().find(queryString); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByHQL(java.lang.String) */ public List<T> findAllByHQL(final String hql) { return this.findAllByHQLPage(hql, null, -1, -1); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByHQL(java.lang.String, java.lang.Object[]) */ public List<T> findAllByHQL(final String hql, final Object[] params) { return this.findAllByHQLPage(hql, params, -1, -1); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByPage(java.lang.Class, int, int) */ public List<T> findAllByPage(Class<T> entityClass, int start, int limit) { String hql = "from " + entityClass.getName() + " model"; return this.findAllByHQLPage(hql, null, start, limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByPage_order(java.lang.Class, java.lang.String, int, int) */ public List<T> findAllByPage_order(Class<T> entityClass,String orderDesc, int start, int limit) { String hql = "from " + entityClass.getName() + " model order by "+orderDesc; return this.findAllByHQLPage(hql, null, start, limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByPropertyPage(java.lang.Class, java.lang.String, java.lang.Object, int, int) */ public List<T> findAllByPropertyPage(Class<T> entityClass, String propertyName, Object propertyValue,int start,int limit) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + "= ? "; return this.findAllByHQLPage(queryString, new Object[]{propertyValue}, start, limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByPropertyPage_order(java.lang.Class, java.lang.String, java.lang.Object, java.lang.String, int, int) */ public List<T> findAllByPropertyPage_order(Class<T> entityClass, String propertyName, Object propertyValue,String orderDesc,int start,int limit) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + "=? order by "+orderDesc; return this.findAllByHQLPage(queryString, new Object[]{propertyValue}, start, limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByPropertiesPage(java.lang.Class, java.lang.String[], java.lang.Object[], int, int) */ public List<T> findAllByPropertiesPage(Class<T> entityClass, String[] propertyNames, Object[] propertyValues,int start,int limit) { if (!(propertyNames!=null&&propertyValues!=null&&propertyValues.length==propertyNames.length)) { throw new RuntimeException("请提供正确的参数值！propertyNames与propertyValues必须一一对应!"); } String queryString = "from " + entityClass.getName() + " as model where " ; for (int i = 0; i < propertyValues.length; i++) { queryString += " model."+propertyNames[i]+" = ? "; if(i != propertyValues.length-1){ queryString += " and "; } } return this.findAllByHQLPage(queryString,propertyValues,start,limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByPropertiesPage_order(java.lang.Class, java.lang.String[], java.lang.Object[], java.lang.String, int, int) */ public List<T> findAllByPropertiesPage_order(Class<T> entityClass, String[] propertyNames, Object[] propertyValues,String orderDesc,int start,int limit) { if (!(propertyNames!=null&&propertyValues!=null&&propertyValues.length==propertyNames.length)) { throw new RuntimeException("请提供正确的参数值！propertyNames与propertyValues必须一一对应!"); } String queryString = "from " + entityClass.getName() + " as model where " ; for (int i = 0; i < propertyValues.length; i++) { queryString += " model."+propertyNames[i]+" = ? "; if(i != propertyValues.length-1){ queryString += " and "; } } queryString += " order by "+orderDesc; return this.findAllByHQLPage(queryString,propertyValues,start,limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByLikePropertyPage(java.lang.Class, java.lang.String, java.lang.String, int, int) */ public List<T> findAllByLikePropertyPage(Class<T> entityClass, String propertyName, String propertyValue,int start,int limit) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + " like '%"+propertyValue+"%'"; return this.findAllByHQLPage(queryString, null, start, limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByLikePropertyPage_order(java.lang.Class, java.lang.String, java.lang.String, java.lang.String, int, int) */ public List<T> findAllByLikePropertyPage_order(Class<T> entityClass, String propertyName, String propertyValue,String orderDesc,int start,int limit) { String queryString = "from " + entityClass.getName() + " as model where model." + propertyName + " like '%"+propertyValue+"%'"; queryString += " order by "+orderDesc; return this.findAllByHQLPage(queryString, null, start, limit); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByHQLPage(java.lang.String, java.lang.Object[], int, int) */ public List<T> findAllByHQLPage(final String hql, final Object[] params, final int start, final int limit) { return (List<T>) super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Query query = session.createQuery(hql); if (params != null && params.length > 0) { for (int i = 0; i < params.length; i++) { query.setParameter(i, params[i]); } } // 表示是分页查询 if (start != -1 && limit != -1) { query.setFirstResult(start); query.setMaxResults(limit); } return query.list(); } }); } /* (non-Javadoc) * @see org.books.dao.BaseDao#getTotalCount(java.lang.Class) */ public Long getTotalCount(final Class<T> entityClass) { return (Long) super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { String hql = "select count(o) from " + entityClass.getName() + " o"; Query query = session.createQuery(hql); Object obj = query.uniqueResult(); return obj; } }); } /* (non-Javadoc) * @see org.books.dao.BaseDao#getTotalCountByHQL(java.lang.String, java.lang.Object[]) */ public Long getTotalCountByHQL(final String hql, final Object[] params) { return (Long) super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Query query = session.createQuery(hql); if (params != null && params.length > 0) { for (int i = 0; i < params.length; i++) { query.setParameter(i, params[i]); } } return query.uniqueResult(); } }); } /* (non-Javadoc) * @see org.books.dao.BaseDao#getTotalCountByHQL(java.lang.String) */ public Long getTotalCountByHQL(final String hql) { return this.getTotalCountByHQL(hql, null); } /*************************************************************************** * 以下部分是QBE查询 **************************************************************************/ /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByQBE(java.lang.Class, T) */ public List<T> findAllByQBE(final Class<T> entityClass, final T example) { return this.findAllByQBEPage(entityClass, example, -1, -1); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByQBEPage(java.lang.Class, T, int, int) */ public List<T> findAllByQBEPage(final Class<T> entityClass, final T example, final int start, final int limit) { return this.findAllByQBEPage(entityClass, example, start, limit, null); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByQBEPage(java.lang.Class, T, int, int, org.hibernate.criterion.Order[]) */ public List<T> findAllByQBEPage(final Class<T> entityClass, final T example, final int start, final int limit, final Order[] orders) { return (List<T>) super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Criteria criteria = session.createCriteria(entityClass); criteria.add(Example.create(example)); // 设置排序 if (orders != null && orders.length > 0) { for (int i = 0; i < orders.length; i++) { criteria.addOrder(orders[i]); } } if (start != -1 && limit != -1) { criteria.setFirstResult(start); criteria.setMaxResults(limit); } return criteria.list(); } }); } /* (non-Javadoc) * @see org.books.dao.BaseDao#getStatisticalValueByQBE(java.lang.Class, T, org.hibernate.criterion.Projection) */ public Object getStatisticalValueByQBE(final Class<T> entityClass, final T example, final Projection projection) { return super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Criteria criteria = session.createCriteria(entityClass); criteria.add(Example.create(example)); criteria.setProjection(projection); return criteria.uniqueResult(); } }); } /* (non-Javadoc) * @see org.books.dao.BaseDao#getTotalCountByExample(java.lang.Class, T) */ public Integer getTotalCountByExample(final Class<T> entityClass, final T example) { return (Integer) super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Criteria criteria = session.createCriteria(entityClass); criteria.add(Example.create(example)); criteria.setProjection(Projections.rowCount());// 总行数 return criteria.uniqueResult(); } }); } /*************************************************************************** * 以下是QBC查询 **************************************************************************/ /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByQBCPage(java.lang.Class, int, int, org.hibernate.criterion.Criterion[], org.hibernate.criterion.Order[], org.hibernate.criterion.Projection[], boolean) */ public Object findAllByQBCPage(final Class<T> entityClass, final int start, final int limit,final Criterion[] criterions,final Order[] orders, final Projection[] projs, final boolean isUniqueResult) { return super.getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Criteria criteria = session.createCriteria(entityClass); //添加条件 if(criterions!=null&&criterions.length>0){ for (int i = 0; i < criterions.length; i++) { criteria.add(criterions[i]); } } //添加排序 if(orders!=null&&orders.length>0){ for (int i = 0; i < orders.length; i++) { criteria.addOrder(orders[i]); } } //添加分组统计 if(projs!=null&&projs.length>0){ for (int i = 0; i < projs.length; i++) { criteria.setProjection(projs[i]); } } //查看是否要分页 if(start!=-1&&limit!=-1){ criteria.setFirstResult(start); criteria.setMaxResults(limit); } if(isUniqueResult){ return criteria.uniqueResult(); }else{ return criteria.list(); } } }); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByQBCPage(java.lang.Class, int, int, org.hibernate.criterion.Criterion[], org.hibernate.criterion.Order[]) */ public List<T> findAllByQBCPage(final Class<T> entityClass, final int start, final int limit,final Criterion[] criterions,final Order[] orders) { return (List<T>) this.findAllByQBCPage(entityClass, start, limit, criterions, orders, null, false); } /* (non-Javadoc) * @see org.books.dao.BaseDao#findAllByQBCPage(java.lang.Class, int, int, org.hibernate.criterion.Criterion[]) */ public List<T> findAllByQBCPage(final Class<T> entityClass, final int start, final int limit,final Criterion[] criterions) { return (List<T>) this.findAllByQBCPage(entityClass, start, limit, criterions, null, null, false); 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