for what？ while 与 until 差在哪？

终于，来到了shell十三问的最后一问了... 长长吐一口气~~~~最后要介绍的是shell script设计中常见的循环(loop).所谓的loop就是script中的一段在一定条件下反复执行的代码。bash shell中常用的loop有如下三种：forwhileuntilfor loopfor loop 是从一个清单列表中读进变量的值，并依次的循环执行do到done之间的命令行。

What are the steps in the JDBC connection?

Step 1 : Register the database driver by using :Class.forName(\" driver classs for that specific database\" );Step 2 : Now create a database connection using :Connection con = DriverManager.getConnection(url,username,password);Step 3: Now Create a query using :Statement stmt = Connection.Statement(\"

What does the Class.forName("MyClass") do?

Loads the class MyClass.Execute any static block code of MyClass.Returns an instance of MyClass.

What's sprint?

Sprint是短距离赛跑的意思，这里面指的是一次迭代，而一次迭代的周期是1个月时间（即4个星期），也就是我们要把一次迭代的开发内容以最快的速度完成它，这个过程我们称它为Sprint。

What type of wildcards have you used?

首先说下什么是 wildcardsWildcards are special characters that allow matching string without having exact match.SQL 通配符必须与 LIKE 运算符一起使用% 替代一个或多个字符_ 仅替代一个字符[charlist] 字符列中的任何单一字符[^charlist]或者[!charlist]不在字符列中的任何单一字符

What does web module contain?

The web module contains:JSP filesclass files for servletsGIF and HTML filesa Web deployment descriptor.Web modules are packaged as JAR files with a .war (Web ARchive) extension.

What does application client module contain?

The application client module contains:class filesan application client deployment descriptor.Application client modules are packaged as JAR files with a .jar extension.

What are considered as a web component?

What is the file extension used for hibernate mapping file?

filename.hbm.xml

What is Session in Hibernate?

Session 代表一个小单位的工作它保持与数据库的连接并且它们是非线程安全的

What is SessionFactory in Hibernate?

SessionFactory 是一个创建 hibernate Session 对象的工厂.它可以作为单一的 data store 及也是线程安全的，使多个线程可以使用相同的 SessionFactory.一个 Java JEE 应用只有一个 SessionFactory 如果只有一个数据库的话当创建之后关于 Object/Relational mapping 的元数据是不能改的.

what are benefits of using spring?

Lightweight: Spring is lightweight when it comes to size and transparency. The basic version of spring framework is around 2MB.Inversion of control (IOC): Loose coupling is achieved in spring using the technique Inversion of Control. The objects give their dependencies instead of creating or looking for dependent objects.

What do you understand by JSP Actions?

JSP actions are XML tags that direct the server to use existing components or control the behavior of the JSP engine.There are six JSP Actions:< jsp : include / >< jsp : forward / >< jsp : plugin / >< jsp : usebean / >< jsp : setProperty / >< jsp : getProperty / >