在linux环境下操作mysql数据库，实现mysql的增删查找操作。-In the Linux environment operation mysql database, so as to realize the deletion or omission of some mysql search operation.

libxml是一个开源的库，linux下解析xml文件经常用到，进行一些创读增删的操作。 在这里，本测试程序源代码，来处理这个xml换行问题。-Libxml is an open source library, under Linux is often used to parse the XML file, for some gen read add or delete operation. Here, the test program source code, to deal with