160707、Tomcat 使用 c3p0连接池

Tomcat 中Jndi是使用Tomcat自带的连接池，由于客户要求，抛弃Tomcat自带的连接池。使用c3p0 。经过几个小时调试，解决方案如下： 

环境：Tomcat 6 

下面来看Jndi 与 c3p0 结合： 
下载地址：http://nchc.dl.sourceforge.net/sourceforge/ 
c3p0/c3p0c3p0-0.9.0.4.bin.zip 
把 c3p0-0.9.0.4.jar 放到应用服务的%tomcat6%/lib目录下。如： 
1.在context.xml中<Context></Context>内加<Resource />，完整的示例：

<?xml version= '1.0'  encoding= 'utf-8' ?>
<Context>

<WatchedResource>WEB-INF/web.xml</WatchedResource>
<!-- 下面注释部分为使用jndi+tomcat自带的连接池-->
<!--<Resource name="jdbc/ctitc"  type= "javax.sql.DataSource"
    username="business"  password= "ctitc"               driverClassName="oracle.jdbc.driver.OracleDriver"  url= "jdbc:oracle:thin:@127.0.0.1:1521:FJTDC"
maxIdle="30"  maxWait= "5000"   maxActive= "100" />
    -->
    <!-- 下面注释部分为使用jndi+c3p0-->
    <Resource name="jdbc/ctitc"
            type="com.mchange.v2.c3p0.ComboPooledDataSource"
            maxPoolSize="50"  minPoolSize= "2"  acquireIncrement= "2"
            factory="org.apache.naming.factory.BeanFactory"
            user="user"  password= ""
            driverClass="oracle.jdbc.driver.OracleDriver"
            jdbcUrl="jdbc:oracle:thin:@127.0.0.1:1521:ORCL"
            />

</Context>

<?xml version='1.0' encoding='utf-8'?>
<Context>

<WatchedResource>WEB-INF/web.xml</WatchedResource>
<!-- 下面注释部分为使用jndi+tomcat自带的连接池-->
<!--<Resource name="jdbc/ctitc" type="javax.sql.DataSource"
    username="business" password="ctitc"              driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@127.0.0.1:1521:FJTDC"
maxIdle="30" maxWait="5000"  maxActive="100"/>
    -->
    <!-- 下面注释部分为使用jndi+c3p0-->
    <Resource name="jdbc/ctitc"
            type="com.mchange.v2.c3p0.ComboPooledDataSource"
            maxPoolSize="50" minPoolSize="2" acquireIncrement="2"
            factory="org.apache.naming.factory.BeanFactory"
            user="user" password=""
            driverClass="oracle.jdbc.driver.OracleDriver"
            jdbcUrl="jdbc:oracle:thin:@127.0.0.1:1521:ORCL"
            />

</Context>

2.在web.xml添加：

<resource-ref>
    <description>DB Connection</description>
    <res-ref-name>jdbc/ctitc</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
</resource-ref>

<resource-ref>
    <description>DB Connection</description>
    <res-ref-name>jdbc/ctitc</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
</resource-ref>