（七）Hibernate中使用JDBC

• 在hibernate中获取connection数据库连接有两种方法：(操作数据库常用这种方法)
• 1. session.doReturningWork   返回一个对象，适用于查询方法
• 2. session.doWork      不返回对象，适用于增删改

案例一：

package action;

import java.sql.Connection;

import java.sql.SQLException;

import org.apache.commons.dbutils.QueryRunner;

import org.apache.commons.dbutils.handlers.BeanHandler;

import org.hibernate.Session;

import org.hibernate.Transaction;

import org.hibernate.cache.spi.QueryResultsRegion;

import org.hibernate.jdbc.ReturningWork;

import bean.User;

import util.HibernateUtil;

public class Query_JDBC {

    public static void main(String[] args) {

        Query_JDBC.jdbc();

    }

    /**

     * 在Hibernate中获取Connection接口

     */

    private static void jdbc() {

        Session session = null;

        Transaction tran = null;

        try {

            session = HibernateUtil.getSession();

            tran = session.beginTransaction();

            User user = session.doReturningWork(new ReturningWork<User>() {

                @Override

                public User execute(Connection conn) throws SQLException {

                    QueryRunner queryRunner = new QueryRunner();

                    String sql = "select username,userid,is_admin as isadmin from user where userid=1";   //数据库中的is_admin和bean中的isdmin不一致

                    User user = queryRunner.query(conn, sql,

                            new BeanHandler<User>(User.class));

                    return user;

                }

            });

            System.out.println("username=" + user.getUsername() + "\t"

                    + "userid=" + user.getUserid() + "\t" + "isadmin?"

                    + user.getIsAdmin());

            tran.commit();

        } catch (Exception e) {

            e.printStackTrace();

            tran.rollback();

        } finally {

            HibernateUtil.closeSession();

        }

    }

}

结果：

代码在下面章节