SSH的一个BaseDao继承HibernateDaoSupport(一)
2013-04-27 11:18
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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);
}
/* (non-Javadoc)
* @see org.books.dao.BaseDao#findAllByQBCPage(java.lang.Class, org.hibernate.criterion.Criterion[])
*/
public List<T> findAllByQBCPage(final Class<T> entityClass,final Criterion[] criterions) {
return (List<T>) this.findAllByQBCPage(entityClass, -1, -1, criterions, null, null, false);
}
/* (non-Javadoc)
* @see org.books.dao.BaseDao#getTotalCountByQBC(java.lang.Class, org.hibernate.criterion.Criterion[])
*/
public Integer getTotalCountByQBC(final Class<T> entityClass,final Criterion[] criterions){
return (Integer)this.findAllByQBCPage(entityClass, -1, -1, criterions, null,new Projection[]{Projections.rowCount()}, true);
}
}
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