Java项目中使用Hibernate处理数据

package test; import java.util.List; import net.sf.hibernate.Hibernate; import net.sf.hibernate.Session; import net.sf.hibernate.SessionFactory; import net.sf.hibernate.cfg.Configuration; import test.hibernate.Product; // 用法： // java test.FindProductByName name public class FindProductByName {     public static void main(String[] args) throws Exception {         // 执行的查询         String query =             "select product from product "             + "in class test.hibernate.Product "             + "where product.name=:name";         // 搜索的内容         String name = args[0];         // 初始化         Configuration cfg = new Configuration()                            .addClass(Product.class);         SessionFactory sf = cfg.buildSessionFactory();         // 打开会话         Session sess = sf.openSession();                  // 搜索并返回         List list = sess.find(query, name,                                Hibernate.STRING);         if (list.size() == 0) {             System.out.println("No products named "                                 + name);             System.exit(0);         }         Product p = (Product) list.get(0);         sess.close();         System.out.println("Found product: " + p);     } }

double percentage = Double.parseDouble(args[0])/100; sess = sf.openSession(); Transaction t = sess.beginTransaction(); // 列表包含产品 Iterator iter = list.iterator(); while (iter.hasNext()) {     Product p = (Product) iter.next();                 p.setPrice(p.getPrice() * (1 + percentage));     sess.saveOrUpdate(p);       } t.commit(); sess.close();