Tomcat连接池的配置及调用

1.把数据库JDBC驱动拷贝到%TOMCAT_HOME%/common/lib和%TOMCAT_HOME%/webapps/yourweb/WEB-INF/lib下

2.修改tomcat安装目录下conf/server.xml,在Host元素下添加一个Context元素,示例:
<Context path="/TomcatPool" docBase="E:\\Tomcat 5.5\\webapps\\TomcatPool" debug="1" reloadable="true">
	<Resource name="jdbc/ds" type="javax.sql.DataSource"
		driverClassName="com.microsoft.jdbc.sqlserver.SQLServerDriver"
	url="jdbc:microsoft:sqlserver://localhost:1433;databasename=pubs"
		username="sa" password="sa"
		maxWait="5000" maxActive="4"
		maxIdle="4"/>
</Context>

3.修改TomcatPool工程的web.xml,添加一个resource-ref元素
<resource-ref>
      <description>sqlserverDB connection</description>
      <res-ref-name>jdbc/ds</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
</resource-ref>

4.调用
javax.naming.Context context = new javax.naming.InitialContext();
javax.sql.DataSource ds = (javax.sql.DataSource)context.lookup("java:comp/env/jdbc/ds");
java.sql.Connection conn = ds.getConnection();