AbstractItemVisitor

WebWork是由OpenSymphony组织开发的，致力于组件化和代码重用的J2EE Web框架。WebWork目前最新版本是2.2.2，现在的WebWork2.x前身是Rickard Oberg开发的WebWork，但现在WebWork已经被拆分成了Xwork1和WebWork2两个项目。(WebWork is developed by the OpenSymphony organization dedicated to componentization and code reuse J2EE Web framework. WebWork latest version is 2.2.2, and now WebWork2.x predecessor Rickard Oberg developed WebWork, but now has been split into Xwork1 WebWork and WebWork2 two projects.)

第五大道商城有购物车的增加删除修改和订单详情，MySQL数据库，能有数据库表(Fifth Avenue Mall has shopping cart addition, deletion, modification and order details, MySQL database, can have database tables)

Handle "hello" messages and feature discovery.

thinking in java 是一部经典的java书籍，无论是是对于初学者还是有一定开发经验的java程序员来说，他都是一不好说，称得上是一部经典。(thinking in java java books is a classic, whether for a beginner or have some experience in the development of java programmers, he is a hard to say, be regarded as a classic.)

Handle "hello" messages and feature discovery.

Bacon Cipher java code

说明：  谷粒学院后台接口，谷粒学院是一个B2C模式的职业技能在线教育系统，分为前台用户系统和后台运营平台(Cereal college background interface, cereal college is a B2C mode of vocational skills online education system, divided into the foreground user system and background operation platform)

主要用于支持spatial indexing technology, 使用spatial index包括R-tree以及R-tree的扩展，可以进行包含坐标数据的index以及search(Used to support spatial indexing technology, including the use of spatial index R-tree and R-tree extension can contain coordinate data of the index and search)

该源码通过java语言详细描述了栈这种数据结构的实现方法(The source language is described in detail by java stack Realization of this data structure)

java 调用 matlab生成的jar文件实现两个数相加(jar file generated by the java call matlab sum of two numbers)