请高手指点 配置数据源 如何配置以及 如何使用 连接池.

Question

在conf/server.xml中配置下试试
...
<Context workDir="work\Catalina\localhost\dataentry" path="/dataentry" docBase="D:\tools\jakarta-tomcat-5.0.28\webapps\dataentry">
   <Resource type="javax.sql.DataSource" name="jdbc/oraDataSource"/>
    <ResourceParams name="jdbc/oraDataSource">
      <parameter>
        <name>url</name>
        <value>jdbc:oracle:thin:@localhost:1521:oracle</value>
      </parameter>
      <parameter>
        <name>password</name>
        <value>dataentry</value>
      </parameter>
      <parameter>
        <name>maxActive</name>
        <value>4</value>
      </parameter>
      <parameter>
        <name>maxWait</name>
        <value>5000</value>
      </parameter>
      <parameter>
        <name>driverClassName</name>
        <value>oracle.jdbc.driver.OracleDriver</value>
      </parameter>
      <parameter>
        <name>username</name>
        <value>dataentry</value>
      </parameter>
      <parameter>
        <name>maxIdle</name>
        <value>2</value>
      </parameter>
    </ResourceParams>
</Context>