[size=large]请问tomcat-dbcp与commons-dbcp有什么区别？
是不是配置文件不一样？[/size]
Many Jakarta projects support interaction with a relational database. Creating a new connection for each user can be time consuming (often requiring multiple seconds of clock time), in order to perform a database transaction that might take milliseconds. Opening a connection per user can be unfeasible in a publicly-hosted Internet application where the number of simultaneous users can be very large. Accordingly, developers often wish to share a "pool" of open connections between all of the application's current users. The number of users actually performing a request at any given time is usually a very small percentage of the total number of active users, and during request processing is the only time that a database connection is required. The application itself logs into the DBMS, and handles any user account issues internally.
There are several Database Connection Pools already available, both within Jakarta products and elsewhere. This Commons package provides an opportunity to coordinate the efforts required to create and maintain an efficient, feature-rich package under the ASF license.
[color=red]The commons-dbcp package relies on code in the commons-pool package to provide the underlying object pool mechanisms that it utilizes.
Applications can use the commons-dbcp component directly or through the existing interface of their container / supporting framework. For example the Tomcat servlet container presents a DBCP DataSource as a JNDI Datasource. James (Java Apache Mail Enterprise Server) has integrated DBCP into the Avalon framework. A Avalon-style datasource is created by wrapping the DBCP implementation. The pooling logic of DBCP and the configuration found in Avalon's excalibur code is what was needed to create an integrated reliable DataSource.[/color]
tomcat-dbcp支持jndi的方式注册绑定
:D 个人认为没有什么区别.
可能的区别在于Common-DBCP被Tomcat集成使用了,用的多了大家都说Tomcat下DBCP如何如何配置,慢慢的就叫成了Tomcat-DBCP.
个人认为可能名字不一样就是区别吧 :wink: 本质上都是Commons-DBCP.
tomcat-dbcp 包括了 pool的功能.但是Common-DBCP没有 它要加上common-pool才能实行 pool 的功能.
Common-DBCP 不支持 jnid ,tomcat 支持.
tomcat 连接池 用tomcat-dbcp.像hibernate ibatis 一般使用 common-dbcp
不过都是apache 的东西可能只是封装上的不同,实行机制应该都是一样.
commons-dbcp 包依赖于commons-pool包的代码以提供对象池机制
tomcat-dbcp基本上就是commons-dbcp加commons-pool的功能，