//错误位置: 这个错误出现在持久层与数据库交互时,原因是 queryForObject这个方法封装唯一值,但是给出的sql语句返回了多个值 public int getListCount(SqlMapClient sqlmap, Object obj) throws SQLException{ return (Integer) sqlmap.queryForObject("getListCount", obj); }…

背景介绍ibatis实现之前,先来看一段jdbc代码: Class.forName("com.mysql.jdbc.Driver"); String url = "jdbc:mysql://localhost:3306/learnworld"; Connection con = DriverManager.getConnection(url, "root","learnworld"); String sql = "s…

首先上题目: A DNA sequence can be represented as a string consisting of the letters A, C, G and T, which correspond to the types of successive nucleotides in the sequence. Each nucleotide has an impact factor, which is an integer. Nucleotides of types A,…

Performance Considerations for Entity Framework 5 By David Obando, Eric Dettinger and others Published: April 2012 1. Introduction Object-Relational Mapping frameworks are a convenient way to provide an abstraction for data access in an object-orient…

一个外文对GLKit的讲解: Beginning OpenGL ES 2.0 with GLKit Part 1    英文原文链接:http://www.raywenderlich.com/5223/beginning-opengl-es-2-0-with-glkit-part-1 Beginning OpenGL ES 2.0 with GLKit Part 2    英文原文链接:http://www.raywenderlich.com/5235/beginning-opengl-es-2…

本来先打算上个图来说明一下这条线的,可是我的画图工具还没有安装好,我先把跟TestClient.java相关的几个文件代码贴上来,但是由于代码行数还是不少的,所以请大家阅读文章的时候先不要展开代码,等读到有关代码解释的时候再返回去查看.代码源自FastDFS老大鱼大大的. TestClient.java: /** * Copyright (C) 2008 Happy Fish / YuQing * * FastDFS Java Client may be copied only under th…

一.基本配置     配置文件将在你第一次启动ejabberd时加载,从该文件中获得的内容将被解析并存储到内部的ejabberd数据库中,以后的配置将从数据库加载,并且任何配置文件里的命令都会被添加到数据库里. 需要注意的是:ejabberd从不编辑配置文件,因此,使用Web管理修改的配置被存储在数据库中, 而不是反射到配置文件.如果你想那些修改在ejabberd重启后还有效,你可以同时也修改配置文件或删除它的所有内容. 配置文件包含一系列Erlang条款.以‘%’标志开始的行被忽略.每个条款是…

Update 10/24/12: If you’d like a new version of this tutorial fully updated for iOS 6 and Xcode 4.5, check out iOS 5 by Tutorials Second Edition! Note from Ray: This is the fourth iOS 5 tutorial in the iOS 5 Feast! This tutorial is a free preview cha…

转载自:http://blogs.msdn.com/b/ialonso/archive/2012/10/08/inaccurate-values-for-currently-allocated-space-and-available-free-space-in-the-shrink-file-dialog-for-tempdb-only.aspx   Inaccurate values for "Currently allocated space" and "Availabl…

Machine Learning for Developers Most developers these days have heard of machine learning, but when trying to find an 'easy' way into this technique, most people find themselves getting scared off by the abstractness of the concept of Machine Learnin…