SpringMVC、Spring、Hibernate经典demo

package com.zyytest.dao.impl.common; import java.io.Serializable; import java.lang.reflect.ParameterizedType; import java.util.List; import java.util.Map; import org.hibernate.Criteria; import org.hibernate.Hibernate; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.criterion.Criterion; import org.hibernate.criterion.Order; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository; import com.zyytest.dao.common.BaseDao; import com.zyytest.model.SystemContext; import com.zyytest.model.common.PageModel; /** * 使用Hibernate实现的泛型通用Dao */ @SuppressWarnings("unchecked") @Repository public abstract class BaseDaoImpl<T> implements BaseDao<T> { /** 当前操作到的实体类的类型信息实例 */ protected Class<T> clazz; protected Serializable oid; /** Session工厂 */ protected SessionFactory sessionFactory; /**构造方法*/ public BaseDaoImpl(){ //通过反射机制获取T的类型信息 ParameterizedType type = (ParameterizedType)this.getClass().getGenericSuperclass(); this.clazz = (Class)type.getActualTypeArguments()[0]; } /** 取得SessionFactory对象 */ protected SessionFactory getSessionFactory() { return sessionFactory; } @Autowired public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; this.oid = this.getId(); } /** 取得当前Session */ protected Session getSession(){ return this.sessionFactory.getCurrentSession(); } ////////////////////////////// CRUD操作 ////////////////////////////////////// /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#add(java.lang.Object) */ public void add(T entity) { getSession().save(entity); } /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#delete(java.lang.Object) */ public void delete(T entity) { getSession().delete(entity); } /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#delete(java.io.Serializable) */ public void delete(Serializable id) { getSession().delete(getSession().load(clazz, id)); } /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#update(java.lang.Object) */ public void update(T entity) { getSession().update(entity); getSession().merge(entity); } /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#get(java.io.Serializable) */ public T get(Serializable id) { return (T)getSession().get(clazz, id); } /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#load(java.io.Serializable) */ public T load(Serializable id) { return (T)getSession().load(clazz, id); } //当确定返回的实例只有一个或者null时 用uniqueResult()方法 public long countResult() { long result = 0; Long count = (Long)createQuery("select count(t) from "+ clazz.getSimpleName() + " t").uniqueResult(); if(count != null){ result = count.longValue(); } return result; } public int countHqlResult(String hql, Object... values) { int result = 0; result = Integer.parseInt(createQuery(hql, values).uniqueResult().toString()); return result; } /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#getAll() */ public List<T> findAll() { return createCriteria().list(); } public List<T> findAll(String orderByProperty, boolean desc){ Criteria c = createCriteria(); if(desc){ c.addOrder(Order.desc(orderByProperty)); }else{ c.addOrder(Order.asc(orderByProperty)); } return c.list(); } /* (non-Javadoc) * @see com.tjitcast.dao.base.GenericDao#getByPager(int, int) */ public PageModel<T> findByPager() { int pageSize = SystemContext.getSize(); int pageNo = SystemContext.getOffset(); PageModel<T> pm = new PageModel<T>(); pm.setPageNo(pageNo); pm.setPageSize(pageSize); StringBuilder sb = new StringBuilder(); sb.append("select count(").append(oid).append(") from ").append(clazz.getSimpleName()); Long count = (Long)createQuery(sb.toString()).uniqueResult(); if(count !=null && count.intValue() > 0){ pm.setRecordCount(count.intValue()); List<T> list = createCriteria() .setMaxResults(pageSize) .setFirstResult(pageNo) .list(); pm.setDatas(list); } return pm; } public PageModel<T> findByPager(int pageNo, int pageSize, String orderByProperty, boolean desc){ PageModel<T> pm = new PageModel<T>(); pm.setPageNo(pageNo); pm.setPageSize(pageSize); StringBuilder sb = new StringBuilder(); sb.append("select count(").append(oid).append(") from ").append(clazz.getSimpleName()); Long count = (Long)createQuery(sb.toString()).uniqueResult(); if(count !=null && count.intValue() > 0){ pm.setRecordCount(count.intValue()); Criteria c = createCriteria(); if(desc){ c.addOrder(Order.desc(orderByProperty)); }else{ c.addOrder(Order.asc(orderByProperty)); } List<T> list = c.setMaxResults(pageSize) .setFirstResult((pageNo - 1)*pageSize) .list(); pm.setDatas(list); } return pm; } public List<T> find(String hql, Object... values) { return createQuery(hql, values).list(); } public List<Object[]> find2(String hql, Object... values){ return createQuery(hql, values).list(); } public List<T> find(String hql, Map<String,?> values) { return createQuery(hql, values).list(); } public PageModel<T> find(int pageNo, int pageSize, String hql, Map<String,?> values) { PageModel<T> pm = new PageModel<T>(); pm.setPageNo(pageNo); pm.setPageSize(pageSize); StringBuilder sb = new StringBuilder(hql); sb.delete(0, sb.indexOf("from")+4) .delete(sb.indexOf(" order by"),sb.length()) .insert(0, ")") .insert(0, oid) .insert(0, "select count("); Long count = (Long)createQuery(sb.toString(), values).uniqueResult(); if(count !=null && count.intValue() > 0){ pm.setRecordCount(count.intValue()); List<T> list = createQuery(hql, values) .setMaxResults(pageSize) .setFirstResult((pageNo - 1)*pageSize) .list(); pm.setDatas(list); } return pm; } public PageModel<T> find(int pageNo, int pageSize, String hql, Object... values) { PageModel<T> pm = new PageModel<T>(); pm.setPageNo(pageNo); pm.setPageSize(pageSize); StringBuilder sb = new StringBuilder(hql); sb.delete(0, sb.indexOf("from")) .insert(0, "select count(*) "); Long count = (Long)createQuery(sb.toString(), values).uniqueResult(); if(count !=null && count.intValue() > 0){ pm.setRecordCount(count.intValue()); List<T> list = createQuery(hql, values) .setMaxResults(pageSize) .setFirstResult((pageNo - 1)*pageSize) .list(); pm.setDatas(list); } return pm; } public T findUniqueResult(String hql, Object... values) { return (T)createQuery(hql, values).uniqueResult(); } public T findUniqueResult(String hql, Map<String,?> values) { return (T)createQuery(hql, values).uniqueResult(); } ////////////////////////////// 批量操作 ////////////////////////////////////// public List<T> getBatch(Serializable... ids) { int length = ids == null ? 0 : ids.length; StringBuilder sb = new StringBuilder("from "); sb.append(clazz.getSimpleName()); for(int i = 0 ; i < length; i++){ if(i == 0){ sb.append(" where ").append(oid).append(" in("); } if(i > 0){ sb.append(","); } sb.append(ids[i]); if(i == length -1){ sb.append(")"); } } return createQuery(sb.toString()).list(); } /** * 执行HQL进行批量修改/删除操作. * @param values 命名参�