proxool连接池问题

Question

目前项目使用proxool.0.9.1连接池出现问题：连接不能释放，连接数总是超过最大值
proxool。xml<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
  <proxool>
    <alias>pool</alias>
    <!-- 数据库url连接 -->
    <driver-url>jdbc:mysql://localhost:3306/db</driver-url>
    <!-- mysql驱动 org.gjt.mm.mysql.Driver-->
    <driver-class>org.gjt.mm.mysql.Driver</driver-class>
    <driver-properties>
      <!-- userName -->
      <property name="user" value="root"/>
      <!-- password -->
      <property name="password" value="root"/>
      <property name="useUnicode" value="true"/>
      <property name="characterEncoding" value="utf-8"/>
    </driver-properties>
    <simultaneous-build-throttle>2</simultaneous-build-throttle>
    <maximum-connection-count>2</maximum-connection-count>
    <minimum-connection-count>0</minimum-connection-count>
    <house-keeping-sleep-time>120000</house-keeping-sleep-time>
    <prototype-count>1</prototype-count>
    <maximum-new-connections>10</maximum-new-connections>
    <!--Test SQL(SELECT getDate()) -->
    <house-keeping-test-sql>select CURRENT_DATE</house-keeping-test-sql>
  </proxool>
</something-else-entirely>
web.xml...
 <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>/pool</url-pattern>
  </servlet-mapping>
...
代码中的使用：public static Connection getCon() {
Connection conn=null;
                  try {
                Class.forName("org.logicalcobwebs.proxool.ProxoolDriver");
            } catch (ClassNotFoundException ex) {
                System.err.println(ex);
            }
            try {
                conn = DriverManager.getConnection("proxool.pool");
            } catch (Exception ex1) {
                System.err.println(ex1);
            }
            return conn;
    }释放使用的是
conn。close（）
目前查询数据正常，但是在查询完之后使用conn.close（），在查询总是抱连接已经关闭的问题 请问proxool的连接创建和 释放连接到连接池 应该怎么写？ 最好有代码