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Tomcat 是一个小型的轻量级应用服务器，在中小型系统和并发访问用户不是很多的场合下被普遍使用，是开发和调试JSP 程序的首选。对于一个初学者来说，可以这样认为，当在一台机器上配置好Apache 服务器，可利用它响应对HTML 页面的访问请求。实际上Tomcat 部分是Apache 服务器的扩展，但它是独立运行的，所以当你运行tomcat 时，它实际上作为一个与Apache 独立的进程单独运行的-Tomcat is a small, lightweight application server, in the small and medium systems and concurrent access to the user is not a lot of occasions to be widely used, is to develop and debug JSP program of choice. For a beginner, it can be that when a machine configured Apache server, can use it to respond to access requests on the HTML page. Tomcat is the Apache server is in fact part of the expansion, but it is run independently, so when you run tomcat, it in fact as a separate process with Apache running on separate

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Hibernate的精典实例，包含了所有对象对应关系的处理，包括一对一、一对多、多对多。简单掌握Hibernate最烦人的关系处理。-Hibernate the classical examples, contains all the objects corresponding to the relationship between treatment, including one-on-one, one-to-many, many-to-many. Simple to master the most annoying relationship Hibernate treatment.

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alter table tbl_name add col_name type 例如,给表增加一列weight mysql>alter table pet add weight int 删除列 alter table tbl_name drop col_name 例如，删除列weight： mysql>alter table pet drop weight 改变列 alter table tbl_name modify col_name type 例如，改变weight的类型： mysql> alter table pet modify weight samllint 另一种方法是： alter table tbl_name change old_col_name col_name type 例如： mysql> alter table pet change weight weight samllint 给列更名 mysql>alter table pet change weight wei 给表更名 alter table tbl_name rename new_tbl 例如，把pet表更名为animal mysql>alter table pet rename animal -alter table tbl_name add col_name type for example, to form an increase in weight mysql> alter table pet add weight int Remove Columns alter table tbl_name drop col_name For example, the deletion of column weight: mysql> alter table pet drop weight change out alter table tbl_name modify col_name type for example, the type of weight change: mysql> alter table pet modify w

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用java语言编写的日历。刚刚开始学习JAVA,菜鸟一名，请多指教,希望各位有经验的大哥大姐指导-Using java language calendar. Just started to learn JAVA, a rookie, please advice, I hope you have the experience to guide Sister Brother