谁能将下面的代码解释一下,谢谢了
<Context path="/bookstore" docBase="bookstore" debug="0"
reloadable="true" > <Resource name="jdbc/BookDB"
auth="Container"
type="javax.sql.DataSource" /> <ResourceParams name="jdbc/BookDB">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter> <!-- Maximum number of dB connections in pool. Make sure you
configure your mysqld max_connections large enough to handle
all of your db connections. Set to 0 for no limit.
-->
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter> <!-- Maximum number of idle dB connections to retain in pool.
Set to 0 for no limit.
-->
<parameter>
<name>maxIdle</name>
<value>30</value>
</parameter> <!-- Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
-->
<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter> <!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username</name>
<value>dbuser</value>
</parameter>
<parameter>
<name>password</name>
<value>1234</value>
</parameter> <!-- Class name for mm.mysql JDBC driver -->
<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter> <!-- The JDBC connection url for connecting to your MySQL dB.
The autoReconnect=true argument to the url makes sure that the
mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
connection. mysqld by default closes idle connections after 8 hours.
-->
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost:3306/BookDB?autoReconnect=true</value>
</parameter>
</ResourceParams></Context>
<Context path="/bookstore" docBase="bookstore" debug="0"
reloadable="true" > <Resource name="jdbc/BookDB"
auth="Container"
type="javax.sql.DataSource" /> <ResourceParams name="jdbc/BookDB">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter> <!-- Maximum number of dB connections in pool. Make sure you
configure your mysqld max_connections large enough to handle
all of your db connections. Set to 0 for no limit.
-->
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter> <!-- Maximum number of idle dB connections to retain in pool.
Set to 0 for no limit.
-->
<parameter>
<name>maxIdle</name>
<value>30</value>
</parameter> <!-- Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
-->
<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter> <!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username</name>
<value>dbuser</value>
</parameter>
<parameter>
<name>password</name>
<value>1234</value>
</parameter> <!-- Class name for mm.mysql JDBC driver -->
<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter> <!-- The JDBC connection url for connecting to your MySQL dB.
The autoReconnect=true argument to the url makes sure that the
mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
connection. mysqld by default closes idle connections after 8 hours.
-->
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost:3306/BookDB?autoReconnect=true</value>
</parameter>
</ResourceParams></Context>
解决方案 »
- 用java代码在Linux下备份还原mysql,在线等
- lomboz下进行hibernate的开发
- 对于Web Service如何入门?
- 如何在ecllipse 中建立xml 文件
- 请求帮忙:WebSphere 6.0 CMP Sql Server 2000 using Jbuilder 2006
- sf
- struts+hibernate做的基于地图的租房网站,对hibernate的应用不熟,另,对gis兴趣的朋友也来看看啊
- 使用数据源的问题
- 小弟的小问题?我在编译java程序时如何引用import javax,它总报错~~~~
- 开源jar包源文件修改后 打包成.class
- 系统每隔4、5天就要重启很是郁闷!
- 中小型企业系统的最佳解决方案
reloadable="true" > <Resource name="jdbc/BookDB"
auth="Container"
type="javax.sql.DataSource" /> <ResourceParams name="jdbc/BookDB">
<parameter>
<name>factory </name> //配置个工厂
<value>org.apache.commons.dbcp.BasicDataSourceFactory </value>
</parameter> <!-- Maximum number of dB connections in pool. Make sure you
configure your mysqld max_connections large enough to handle
all of your db connections. Set to 0 for no limit.
-->
<parameter>
<name>maxActive </name>
<value>100 </value>
</parameter> <!-- Maximum number of idle dB connections to retain in pool.
Set to 0 for no limit.
-->
<parameter>
<name>maxIdle </name>
<value>30 </value>
</parameter> <!-- Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
-->
<parameter>
<name>maxWait </name>
<value>10000 </value>
</parameter> <!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username </name>
<value>dbuser </value> //配置数据库用户名
</parameter>
<parameter>
<name>password </name>
<value>1234 </value> //配置数据库密码
</parameter> <!-- Class name for mm.mysql JDBC driver -->
<parameter>
<name>driverClassName </name>
<value>com.mysql.jdbc.Driver </value> //数据库驱动 MySql数据库的
</parameter> <!-- The JDBC connection url for connecting to your MySQL dB.
The autoReconnect=true argument to the url makes sure that the
mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
connection. mysqld by default closes idle connections after 8 hours.
-->
<parameter>
<name>url </name>
<value>jdbc:mysql://localhost:3306/BookDB?autoReconnect=true </value> 数据库配置的URL
</parameter>
</ResourceParams></Context>
还有<Resource name="jdbc/BookDB"
auth="Container"
type="javax.sql.DataSource" /> <ResourceParams name="jdbc/BookDB">
<parameter>
<name>factory </name> //配置个工厂
<value>org.apache.commons.dbcp.BasicDataSourceFactory </value>
</parameter> 这段代码是不是写死了呀