SSH(struts+spring+hibernate)迅速开发--第四章 改造DAO（2）

这个类,基本实现了适合所有查询指令的方法,包括分页和联合查询,然后将自动生成的DAO类,改成基础该类,这样,就完成了每个DAO类的功能改造.如下是修改后的TuserDAO.java,注意粗体部分.

package cn.com.book.demo.hibernate.dao;

 

import java.util.List;

import java.util.Set;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.hibernate.LockMode;

import org.springframework.context.ApplicationContext;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

 

/**

 * Data access object (DAO) for domain model class Tuser.

 *

 * @see cn.com.book.demo.hibernate.dao.Tuser

 * @author MyEclipse Persistence Tools

 */

 

public class TuserDAO extends BaseDAO {

       private static final Log log = LogFactory.getLog(TuserDAO.class);

 

       // property constants

       public static final String USER_NAME = "userName";

 

       public static final String NAME = "name";

 

       public static final String EMAIL = "email";

 

       public static final String PHONE = "phone";

 

       public static final String PASSWORD = "password";

 

       protected void initDao() {

              // do nothing

       }

 

       public void save(Tuser transientInstance) {

              log.debug("saving Tuser instance");

              try {

                     getHibernateTemplate().save(transientInstance);

                     log.debug("save successful");

              } catch (RuntimeException re) {

                     log.error("save failed", re);

                     throw re;

              }

       }

 

       public void delete(Tuser persistentInstance) {

              log.debug("deleting Tuser instance");

              try {

                     getHibernateTemplate().delete(persistentInstance);

                     log.debug("delete successful");

              } catch (RuntimeException re) {

                     log.error("delete failed", re);

                     throw re;

              }

       }

 

       public Tuser findById(java.lang.Integer id) {

              log.debug("getting Tuser instance with id: " + id);

              try {

                     Tuser instance = (Tuser) getHibernateTemplate().get(

                                   "cn.com.book.demo.hibernate.dao.Tuser", id);

                     return instance;

              } catch (RuntimeException re) {

                     log.error("get failed", re);

                     throw re;

              }

       }

 

       public List findByExample(Tuser instance) {

              log.debug("finding Tuser instance by example");

              try {

                     List results = getHibernateTemplate().findByExample(instance);

                     log.debug("find by example successful, result size: "

                                   + results.size());

                     return results;

              } catch (RuntimeException re) {

                     log.error("find by example failed", re);

                     throw re;

              }

       }

 

       public List findByProperty(String propertyName, Object value) {

              log.debug("finding Tuser instance with property: " + propertyName

                            + ", value: " + value);

              try {

                     String queryString = "from Tuser as model where model."

                                   + propertyName + "= ?";

                     return getHibernateTemplate().find(queryString, value);

              } catch (RuntimeException re) {

                     log.error("find by property name failed", re);

                     throw re;

              }

       }

 

       public List findByUserName(Object userName) {

              return findByProperty(USER_NAME, userName);

       }

 

       public List findByName(Object name) {

              return findByProperty(NAME, name);

       }

 

       public List findByEmail(Object email) {

              return findByProperty(EMAIL, email);

       }

 

       public List findByPhone(Object phone) {

              return findByProperty(PHONE, phone);

       }

 

       public List findByPassword(Object password) {

              return findByProperty(PASSWORD, password);

       }

 

       public List findAll() {

              log.debug("finding all Tuser instances");

              try {

                     String queryString = "from Tuser";

                     return getHibernateTemplate().find(queryString);

              } catch (RuntimeException re) {

                     log.error("find all failed", re);

                     throw re;

              }

       }

 

       public Tuser merge(Tuser detachedInstance) {

              log.debug("merging Tuser instance");

              try {

                     Tuser result = (Tuser) getHibernateTemplate().merge(

                                   detachedInstance);

                     log.debug("merge successful");

                     return result;

              } catch (RuntimeException re) {

                     log.error("merge failed", re);

                     throw re;

              }

       }

 

       public void attachDirty(Tuser instance) {

              log.debug("attaching dirty Tuser instance");

              try {

                     getHibernateTemplate().saveOrUpdate(instance);

                     log.debug("attach successful");

              } catch (RuntimeException re) {

                     log.error("attach failed", re);

                     throw re;

              }

       }

 

       public void attachClean(Tuser instance) {

              log.debug("attaching clean Tuser instance");

              try {

                     getHibernateTemplate().lock(instance, LockMode.NONE);

                     log.debug("attach successful");

              } catch (RuntimeException re) {

                     log.error("attach failed", re);

                     throw re;

              }

       }

 

       public static TuserDAO getFromApplicationContext(ApplicationContext ctx) {

              return (TuserDAO) ctx.getBean("TuserDAO");

       }

}