src文件夾的結(jié)構(gòu)如下：

clasDao文件：

package com.school.service;import java.util.List;import com.school.dao.ClasDAO;import com.school.entity.Clas;public class ClasServiceImpl implements ClasService{        PRivate ClasDAO clasDAO;        public void setClasDAO(ClasDAO ClasDAO){        this.clasDAO=ClasDAO;    }        public void saveClas(Clas Clas) {        if(clasDAO.findById(Clas.getId())==null)            clasDAO.save(Clas);    }        public Clas getClas(String name) {        return clasDAO.getClas(name);    }        public void deleteClas(int id) {        if(clasDAO.findById(id)!=null)            clasDAO.delete(id);            }        public void updateClas(Clas clas) {        if(clasDAO.findById(clas.getId())!=null)            clasDAO.update(clas);    }        public Clas findClasById(int id) {        return clasDAO.findById(id);    }        public List<Clas> findAll() {        return clasDAO.findAll();            }    }

ClasDAOImpl文件：

package com.school.dao;import java.util.List;import com.school.dao.ClasDAO;import com.school.entity.Clas;import org.hibernate.Query;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;public class ClasDAOImpl extends HibernateDaoSupport implements ClasDAO{    public void save(Clas user) {        this.getHibernateTemplate().save(user);            }    public Clas getClas(String name)    {        String hsql="from User u where u.name='"+name+"'";        Clas result=(Clas)((Query) this.getHibernateTemplate().find(hsql)).uniqueResult();        return result;    }        public void delete(int id) {        this.getHibernateTemplate().delete(findById(id));    }        public void update(Clas user){        this.getHibernateTemplate().update(user);    }    public Clas findById(int id) {        Clas user = (Clas) this.getHibernateTemplate().get(Clas.class, id);        return user;    }        @SuppressWarnings("unchecked")    public List<Clas> findAll() {        String queryString = "from Clas";        List<Clas> list =this.getHibernateTemplate().find(queryString);        return list;    }}

clasService文件：

package com.school.service;import java.util.List;import com.school.entity.Clas;public interface ClasService {        void saveClas(Clas Clas);    Clas getClas(String name);    void deleteClas(int id);    void updateClas(Clas Clas);    Clas findClasById(int id);    List<Clas> findAll();    }

ClasServiceImpl文件：

package com.school.service;import java.util.List;import com.school.dao.ClasDAO;import com.school.entity.Clas;public class ClasServiceImpl implements ClasService{        private ClasDAO clasDAO;        public void setClasDAO(ClasDAO ClasDAO){        this.clasDAO=ClasDAO;    }        public void saveClas(Clas Clas) {        if(clasDAO.findById(Clas.getId())==null)            clasDAO.save(Clas);    }        public Clas getClas(String name) {        return clasDAO.getClas(name);    }        public void deleteClas(int id) {        if(clasDAO.findById(id)!=null)            clasDAO.delete(id);            }        public void updateClas(Clas clas) {        if(clasDAO.findById(clas.getId())!=null)            clasDAO.update(clas);    }        public Clas findClasById(int id) {        return clasDAO.findById(id);    }        public List<Clas> findAll() {        return clasDAO.findAll();            }    }