SSH实例(3)

src文件夹的结构如下：

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();
    }

}