查看编译后的classes文件后，没有mapper.xml文件，所以SQLsessionfactory不能读取成功。
在Maven中加入如下的resources配置：
<dependencies>//相关的依赖包</dependencies>.....<resources> ?????<resource> ???????<directory>src/main/resources</directory> ???????<includes> ?????????<include>**/*.properties</include> ?????????<include>**/*.xml</include> ?????????<include>**/*.tld</include> ???????</includes> ???????<filtering>false</filtering> ?????</resource> ?????<resource> ???????<directory>src/main/java</directory> ???????<includes> ?????????<include>**/*.properties</include> ?????????<include>**/*.xml</include> ?????????<include>**/*.tld</include> ???????</includes> ???????<filtering>false</filtering> ?????</resource></resources>
IllegalArgumentException: Could not resolve resource location pattern [classpath ?.xml]: class path resource ?cannot be resolved to URL because it does not exist
原文地址：http://www.cnblogs.com/expiator/p/7494965.html