IO - DBUtils

   public static void test_insert() throws SQLException { 
                System.out.println("-------------test_insert()-------------"); 
                //创建连接 ,ConnTools为自己定义的connection工具
                Connection conn = ConnTools.makeConnection(); 
                //创建SQL执行工具 
                QueryRunner qRunner = new QueryRunner(); 
                //执行SQL插入 
                int n = qRunner.update(conn, "insert into user(name,pswd) values(‘iii‘,‘iii‘)"); 
                System.out.println("成功插入" + n + "条数据！"); 
                //关闭数据库连接 
                DbUtils.closeQuietly(conn); 
        } 

        public static void test_find() throws SQLException { 
                System.out.println("-------------test_find()-------------"); 
                //创建连接 
                Connection conn = ConnTools.makeConnection(); 
                //创建SQL执行工具 
                QueryRunner qRunner = new QueryRunner(); 
                //执行SQL查询，并获取结果 
                List<User> list = (List<User>) qRunner.query(conn, "select id,name,pswd from user", new BeanListHandler(User.class)); 
                //输出查询结果 
                for (User user : list) { 
                        System.out.println(user); 
                } 
                //关闭数据库连接 
                DbUtils.closeQuietly(conn); 
        }