完整的Spring+Hibernate+DWR+extJs的生成树及下拉comBoboxTree

wxc2100 写道

谢谢楼主回复！本人初学，还有一个问题呀：
public class RegionDAOImpl extends GenericHibernateDAOCrud<Region> implements IRegionDAO { 
中的GenericHibernateDAOCrud在那里呀！谢谢了！

GenericHibernateDAOCrud 这个类可以提供给你。它在DAO层对Hibernate增、删、改、查的基类支持。也就是我文章中提到的DAO模式。

package com.ssgly.dao;

 
import java.io.Serializable;
import java.lang.reflect.Field;
import java.sql.SQLException;
import java.util.*;

import com.ssgly.model.*;

import org.apache.commons.logging.*;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projections;
import org.springframework.dao.DataRetrievalFailureException;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.HibernateTemplate;

/**
 * This base class is prepared for subclass to do CRUD easily.
 * 
 * @author Tiger
 */
public abstract class GenericHibernateDAOCrud<T> {

    protected static final Object[] EMPTY_OBJECT_ARRAY = new Object[] {};

    protected Log log = LogFactory.getLog(getClass());

    private final Class<T> clazz;
    protected HibernateTemplate hibernateTemplate;

    /**
     * Inject domain's class type in constructor.
     * 
     * @param clazz Domain's class.
     */
    public GenericHibernateDAOCrud(Class<T> clazz) {
        this.clazz = clazz;
    }

    /**
     * @spring.property name="hibernateTemplate" ref="hibernateTemplate"
     */
    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
        this.hibernateTemplate = hibernateTemplate;
    }

    @SuppressWarnings("unchecked")
    public T query(Serializable id) {
        T t = (T)hibernateTemplate.get(clazz, id);
        if(t==null)
            throw new DataRetrievalFailureException("Object not found.");
        // it is strange that load() method return a lazy-loading proxy object 
        // and it may cause LazyInitializationException!
        return t;
    }

    /**
     * Default implementation of creating new domain object.
     */
    public void create(T t) {
        hibernateTemplate.save(t);
    }

    /**
     * Default implementation of deleting new domain object.
     */
    public void delete(T t) {
        hibernateTemplate.delete(t);
    }

    /**
     * Default implementation of updating domain object.
     */
    public void update(T t) {
        hibernateTemplate.update(t);
    }

    /**
     * Do an update hql query, return the affected rows.
     * 
     * @param updateHql Update HQL.
     * @param values Parameters or null if none.
     * @return The affected rows.
     */
    protected int executeUpdate(final String updateHql, final Object[] values) {
        HibernateCallback updateCallback = new HibernateCallback() {
            public Object doInHibernate(Session session) throws HibernateException, SQLException {
                Query query = session.createQuery(updateHql);
                if(values!=null) {
                    for(int i=0; i<values.length; i++)
                        query.setParameter(i, values[i]);
                }
                return new Integer(query.executeUpdate());
            }
        };
        return ((Integer)hibernateTemplate.execute(updateCallback)).intValue();
    }

    /**
     * Prepared for sub-class for convenience. Query for list and also return 
     * total results' number.
     * 
     * @param selectCount HQL for "select count(*) from ..." and should return a Long.
     * @param select HQL for "select * from ..." and should return object list.
     * @param values For prepared statements.
     * @param page Page object for store page information.
     */
    protected List queryForList(final String selectCount, final String select, final Object[] values, final Page page) {
        Long count = (Long)queryForObject(selectCount, values);
        page.setTotalCount(count.intValue());
        if(page.isEmpty())
            return Collections.EMPTY_LIST;
        return queryForList(select, values, page);
    }

    /**
     * Prepared for sub-class for convenience. Query for list but do not return 
     * total results' number.
     * 
     * @param select HQL for "select * from ..." and should return object list.
     * @param values For prepared statements.
     * @param page Page object for store page information.
     */
    protected List queryForList(final String select, final Object[] values, final Page page) {
        // select:
        HibernateCallback selectCallback = new HibernateCallback() {
            public Object doInHibernate(Session session) {
                Query query = session.createQuery(select);
                if(values!=null) {
                    for(int i=0; i<values.length; i++)
                        query.setParameter(i, values[i]);
                }
                return query.setFirstResult(page.getFirstResult())
                            .setMaxResults(page.getPageSize())
                            .list();
            }
        };
        return (List) hibernateTemplate.executeFind(selectCallback);
    }

    /**
     * Prepared for sub-class for convenience. Query for unique result.
     * 
     * @param select HQL for "select * from ..." and should return unique object.
     * @param values For prepared statements.
     */
    protected Object queryForObject(final String select, final Object[] values) {
        HibernateCallback selectCallback = new HibernateCallback() {
            public Object doInHibernate(Session session) {
                Query query = session.createQuery(select);
                if(values!=null) {
                    for(int i=0; i<values.length; i++)
                        query.setParameter(i, values[i]);
                }
                return query.uniqueResult();
            }
        };
        return hibernateTemplate.execute(selectCallback);
    }

    protected Object queryForObject(final DetachedCriteria dc) {
        HibernateCallback callback = new HibernateCallback() {
            public Object doInHibernate(Session session) {
                return dc.getExecutableCriteria(session).uniqueResult();
            }
        };
        return hibernateTemplate.execute(callback);
    }

    

    /**
     * Prepared for sub-class for convenience.
     */
    protected Object uniqueResult(final DetachedCriteria dc) {
        HibernateCallback callback = new HibernateCallback() {
            public Object doInHibernate(Session session) {
                return dc.getExecutableCriteria(session).uniqueResult();
            }
        };
        return hibernateTemplate.execute(callback);
    }
    protected List queryForLists(final String select, final Object[] values) {
        // select:
        HibernateCallback selectCallback = new HibernateCallback() {
            public Object doInHibernate(Session session) {
                Query query = session.createQuery(select);
                if(values!=null) {
                    for(int i=0; i<values.length; i++)
                        query.setParameter(i, values[i]);
                }
                return query.list();
            }
        };
        return (List) hibernateTemplate.executeFind(selectCallback);
    }

}

评论

2 楼 crabboy 2008-12-31  

这个类可以忽略啊。是一个汉字转换的工具类

1 楼 flash8627 2008-12-31  

import com.ssgly.util.Hzxs; 没有