前一段时间看《数据访问模式》时，发现有很多的代码录入错误，看到china...

代码说明：

前一段时间看《数据访问模式》时，发现有很多的代码录入错误，看到china-pub的书评，大家也在抱怨说书的内容还好就是书的校正太差影响了读书的心情，最近稍有闲工夫，我把第一章的“数据访问器”的代码整理出来，有用着的朋友可以直接使用了。-some time ago to see "Data Access Patterns" and found there are many code entry errors, see china-pub, in a review, we also complain about the content better storytellers is the correction of reading too badly affected the mood slightly dumb recently, I put the first chapter of "data access device "The code was sorted out, with useful friends can be directly used.