关键字：conversionService
http://my.oschina.net/lichhao/blog/172562 spirng mvc converter源码解析
http://www.blogjava.net/wmcoo/articles/333472.html
http://starscream.iteye.com/blog/1072179
http://docs.spring.io/spring/docs/current/spring-framework-reference/html/validation.html#format-configuring-formatting-mvc
官方资料
http://stackoverflow.com/questions/12544479/spring-mvc-type-conversion-propertyeditor-or-converter
property--->converter
http://www.cnblogs.com/daxin/p/3198414.html converter接口
http://jinnianshilongnian.iteye.com/blog/1508110 converter相关