一、Spring3.1之前版本的方法

import org.springframework.context.ApplicationContext;
import org.springframework.orm.jpa.support.JpaDaoSupport;
import java.util.*;
import javax.persistence.*;public class CustomerCourseDAO extends JpaDaoSupport implements ICustomerCourseDAO {public String findTeacherNameByCourseId(Integer courseid) {String sql = "select concat(c.Given_Name,' ',c.Family_Name) as teachername from customer c,customer_course cc"+ " where c.Customer_ID = cc.Customer_ID and cc.Related_Code = 2 and  cc.Course_ID = " + courseid.intValue();try {EntityManagerFactory emf = getJpaTemplate().getEntityManagerFactory();EntityManager newEm = emf.createEntityManager();EntityTransaction newTx = newEm.getTransaction();newTx.begin();List result = newEm.createNativeQuery(sql).getResultList();String teachername = "";if(result.size()==1){teachername = (String)result.get(0);}newEm.getDelegate();newTx.commit();newEm.close();emf.close();return teachername;} catch (RuntimeException re) {logger.error("find Teacher's Name by courseId failed", re);throw re;}}//add by edwin， 2007-11-08 测试通过@SuppressWarnings(value = "unchecked")public List<CustomerCourse> findTeaStuByCourseId(Integer id) {String sql = "select model.*  from  customer_course model " + "where model.Related_Code = 1 and model.Course_ID = " + id.intValue();try {EntityManagerFactory emf = getJpaTemplate().getEntityManagerFactory();EntityManager newEm = emf.createEntityManager();EntityTransaction newTx = newEm.getTransaction();newTx.begin();@SuppressWarnings(value = "unchecked")List<CustomerCourse> stu = newEm.createNativeQuery(sql,CustomerCourse.class).getResultList();newTx.commit();newEm.close();emf.close();return stu;} catch (RuntimeException re) {logger.error("find Teacher's students by courseId failed", re);throw re;}}}

二、Spring 3.1之后版本方法

1、在spring配置文件中配置entityManagerFactory

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"><property name="dataSource" ref="dataSource"/><property name="packagesToScan" value="com.alimama.prism.model"/><property name="jpaVendorAdapter"><bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/></property><property name="jpaProperties"><props><prop key="hibernate.temp.use_jdbc_metadata_defaults">false</prop><prop key="hibernate.hbm2ddl.auto">update</prop><prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop><!--<prop key="hibernate.show_sql">true</prop>--><!--<prop key="hibernate.format_sql">true</prop>--><!--<prop key="hibernate.use_sql_comments">true</prop>--></props></property></bean>

2、以下测试方法测试通过

 @Override@SuppressWarnings("unchecked")public List<TaskModel> findByTaskName(String name) {EntityManagerFactory emf= (EntityManagerFactory) SpringUtils.getBean("entityManagerFactory");  //SpringUtils需要自己指定了....EntityManager em=emf.createEntityManager();  String querysql="select * from prism_task where taskname=?";  Query query=em.createNativeQuery(querysql);  query.setParameter(1, name);  List<TaskModel> tasklist=(List<TaskModel>)query.getResultList();  em.close();  return tasklist;}