范类定义超类，简单易用
package com.dao;
import java.io.Serializable;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
/**
?* 实现增删改查的超类
?* @author Administrator
?*
?* @param <T>
?* @param <I>
?*/
@Transactional
public class DaoSupport<T,I extends Serializable> {
?@Autowired protected SessionFactory factory;
?private Class<T> entityClass;
?@SuppressWarnings("unchecked")
?public DaoSupport() {
??Type genType = getClass().getGenericSuperclass();
??if(genType instanceof ParameterizedType){
???ParameterizedType pra=(ParameterizedType)genType;
???Type[] t=pra.getActualTypeArguments();
???if(t.length>0){
???entityClass=(Class<T>) t[0];
???}else{
???entityClass=(Class<T>) Object.class;
???}
??}else{
???entityClass=(Class<T>) Object.class;
??}
?}
?/**
? * 保存数据
? * @param entity
? */
?public void save(T entity) {
??factory.getCurrentSession().save(entity);
?}
?/**
? * 更新数据
? * @param entity
? */
?public void update(T entity){
??factory.getCurrentSession().update(entity);
?}
?/**
? * @param entity
? */
?public void delete(T entity){
??factory.getCurrentSession().delete(entity);
?}
?@SuppressWarnings("unchecked")
?public List<T> listAll(){
??return factory.getCurrentSession().createCriteria(entityClass).list();
??
?}
?@SuppressWarnings("unchecked")
?public T get(I id){
??return (T) factory.getCurrentSession().get(entityClass, id);
?}
?public final SessionFactory getFactory() {
??return factory;
?}
?public final void setFactory(SessionFactory factory) {
??this.factory = factory;
?}
}
