proxool配置详解
Proxool一个数据库连接池框架，提供了对你选择的其它类型的驱动程序的连接池封装。可以非常简单的移植到现存的代码中。
<?xml version=”1.0” encoding=”UTF-8”?>
<something-else-entriely>
<proxool>
<alias>dbname</alias><!—数据源的别名-->
<driver-url>jdbc:oracle:thin:@127.0.0.1:1521:testdb</driver-url><!—url连接串-->
<driver-class>oracle</driver-class><!—驱动类-->
<driver-properties>
<property name=”user” value=”username”/><!—用户名-->
<property name=”password” value=”password”/><!—密码-->
</driver-properties>
<!—最大连接数（默认5个），超过了这个连接数，再有请求是，就排在队列中等待，最大的等待请求书又maximum-new-connections决定-->
<maximum-connection-count>100</maximum-connection-count>
<!—最小连接数(默认2个)-->
<minimum-connection-count>10</minimum-connection-count>
<!—proxool自动侦探各个连接状态的时间间隔(毫秒),侦探到空闲的就马上收回，超时的销毁 默认30秒-->
<house-keeping-sleep-time>90000</house-keeping-sleep-time>
<!—没有空闲连接可以分配而在队列中等候的最大请求书，超过这个请求数的用户连接就不会被接受-->
<maximum-new-connections>400</maximum-new-connections>
<!—最少保持的空闲连接数(默认2个)-->
<prototype-count>5</prototype-count>
<!—在使用之前测试-->
<test-before-use>true</test-before-use>
<!—用户保持连接的测试语句—>
<house-keeping-test-sql>select sysdate from dual</house-keeping-test-sql>
</proxool>
</something-else-entriely>
配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<servlet-name>ServletConfigurator</servlet-name>
<servlet-class>org.logicalcobwebs.proxool.configuration.ServletConfigurator</servlet-class>
<init-param>
<param-name>xmlFile</param-name>
<param-value>WEB-INF/proxool.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>Admin</servlet-name>
<servlet-class>org.logicalcobwebs.proxool.admin.servlet.AdminServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Admin</servlet-name>
<url-pattern>/admin</url-pattern>
</servlet-mapping>
<!-- 配置受保护域，只有Tomcat管理员才能察看连接池的信息 -->
<security-constraint>
<web-resource-collection>
<web-resource-name>proxool</web-resource-name>
<url-pattern>/admin</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>manager</role-name>
</auth-constraint>
</security-constraint>
<login-config>
<auth-method>BASIC</auth-method>
<realm-name>proxool manager Application</realm-name>
</login-config>
<security-role>
<description>The role that is required to log in to the Manager Application</description>
<role-name>manager</role-name>
</security-role>
<error-page>
<error-code>401</error-code>
<location>/401.jsp</location>
</error-page>
</web-app>
ServletConfigurator:加载并初始化proxool.xml文件，因为它是连接数据库的。其他很多模块都用到数据，所以必须首先加载它
load-on-startup:数值越小，就会先被加载初始化
Admin:监控数据库连接池连接情况
//获得数据库的语句
Connection conn = DriverManager.getConnection(“proxool.dbname”);
Proxool.xml配置属性说明
Xml代码：
<?xml version="1.0" encoding="ISO-8859-1"?>
<something-else-entirely xmlns="http://sumthin.else.entirely" xmlns:proxool="The latest version is available at http://proxool.sourceforge.net/xml-namespace">
<proxool:proxool>
<proxool:alias>xml-test-ns</proxool:alias>
<proxool:driver-url>jdbc:hsqldb:db/test</proxool:driver-url>
<proxool:driver-class>org.hsqldb.jdbcDriver</proxool:driver-class>
<proxool:driver-properties>
<proxool:property name="user" value="sa"/>
<proxool:property name="password" value=""/>
</proxool:driver-properties>
<proxool:house-keeping-sleep-time>40000</proxool:house-keeping-sleep-time>
<proxool:house-keeping-test-sql>select CURRENT_DATE</proxool:house-keeping-test-sql>
<proxool:maximum-connection-count>10</proxool:maximum-connection-count>
<proxool:minimum-connection-count>3</proxool:minimum-connection-count>
<proxool:maximum-connection-lifetime>18000000</proxool:maximum-connection-lifetime><!-- 5 hours -->
<proxool:simultaneous-build-throttle>5</proxool:simu
补充：综合编程 , 其他综合 ,
