tomcat中的几种连接池配置代码（包括tomcat5.0,tomcat5.5x,tomcat6.0）

Tomcat6.0连接池配置
1.配置tomcat下的conf下的context.xml文件,在之间添加连接池配置:

  <Resource name="jdbc/oracle"   
         auth="Container"       
         type="javax.sql.DataSource"       
         driverClassName="oracle.jdbc.driver.OracleDriver"       
         url=" jdbc:oracle:thin:@host:port:databse"       
         username=" user "       
         password="password"       
         maxActive="100"       
         maxIdle="30"       
        maxWait="10000" />   

2.配置你的应用下的web.xml中的之间加入:

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

3.把连接数据库的第三方驱动放到common/lib下面就ok了
4.测试程序我就不写了

Tomcat5.5x连接池配置

方式一、全局数据库连接池
1、通过管理界面配置连接池，或者直接在tomcat/conf/server.xml的GlobalNamingResources中增加

<Resource name="jdbc/mydb" 
  type="javax.sql.DataSource"
  password="mypwd"
  driverClassName="com.microsoft.jdbc.sqlserver.SQLServerDriver"
  maxIdle="2"
  maxWait="5000"
  validationQuery="select 1"
  username="sa"
  url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb"
  maxActive="4"/>  

2、在tomcat/webapps/myapp/META-INF/context.xml的Context中增加：

<ResourceLink global="jdbc/mydb" name="jdbc/mydb" type="javax.sql.DataSource"/>    

这样就可以了。
方式二、全局数据库连接池
1、同上
2、在tomcat/conf/context.xml的Context中增加：

<ResourceLink global="jdbc/mydb" name="jdbc/mydb" type="javax.sql.DataSource"/>    

方式三、局部数据库连接池
只需在tomcat/webapps/myapps/META-INF/context.xml的Context中增加：

<Resource name="jdbc/mydb" type="javax.sql.DataSource" password="mypwd" driverClassName="com.microsoft.jdbc.sqlserver.SQLServerDriver" maxIdle="2" maxWait="5000" validationQuery="select 1" username="sa" url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb" maxActive="4"/>    

参数说明：
driveClassName：JDBC驱动类的完整的名称；
maxActive：同时能够从连接池中被分配的可用实例的最大数；
maxIdle：可以同时闲置在连接池中的连接的最大数；
maxWait：最大超时时间，以毫秒计；
password：用户密码；
url：到JDBC的URL连接；
user：用户名称；
validationQuery：用来查询池中空闲的连接。
以上三种方式在tomcat 5.5.4下都可以。另外，sql server的jdbc driver是从微软网站上下载的sql server jdbc (sp3)。

tomcat5.0连接池配置
在tomcat 的下面路径（Tomcat /conf/Catalina/localhost）下建一个xml文件，内容如下

<Resource name="jdbc/test" auth="Container" type="javax.sql.DataSource"/>    
    <ResourceParams name="jdbc/test">    
        <parameter>    
            <name>factory</name>    
            <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>    
        </parameter>    
        <!-- Maximum number of dB connections in pool. Make sure you    
             configure your mysqld max_connections large enough to handle    
             all of your db connections. Set to 0 for no limit.    
             -->    
        <parameter>    
            <name>maxActive</name>    
            <value>100</value>    
        </parameter>    
        <!-- Maximum number of idle dB connections to retain in pool.    
             Set to 0 for no limit.    
             -->    
        <parameter>    
            <name>maxIdle</name>    
            <value>30</value>    
        </parameter>    
        <!-- Maximum time to wait for a dB connection to become available    
             in ms, in this example 10 seconds. An Exception is thrown if   
             this timeout is exceeded.  Set to -1 to wait indefinitely.    
             -->    
        <parameter>    
            <name>maxWait</name>    
            <value>10000</value>    
        </parameter>    
        <!-- MySQL dB username and password for dB connections  -->    
        <parameter>    
            <name>username</name>    
            <value>sa</value>    
        </parameter>    
        <parameter>    
            <name>password</name>    
            <value>test</value>    
        </parameter>    
        <!-- Class name for JDBC driver -->    
        <parameter>    
            <name>driverClassName</name>    
            <value>net.sourceforge.jtds.jdbc.Driver</value>    
        </parameter>    
        <!-- Autocommit setting.  This setting is required to make    
             Hibernate work.  Or you can remove calls to commit(). -->    
        <parameter>    
            <name>defaultAutoCommit</name>    
            <value>true</value>    
        </parameter>    
        <!-- The JDBC connection url for connecting to your MySQL dB.    
             The autoReconnect=true argument to the url makes sure that the    
             mm.mysql JDBC Driver will automatically reconnect if mysqld closed the    
             connection.  mysqld by default closes idle connections after 8 hours.    
             -->    
        <parameter>    
            <name>url</name>    
            <value>jdbc:jtds:sqlserver://url/filedb;charset=gb2312;autoReconnect=true</value>    
        </parameter>    
        <!-- Recover abandoned connections -->    
        <parameter>    
            <name>removeAbandoned</name>    
            <value>true</value>    
        </parameter>    
        <!-- Set the number of seconds a dB connection has been idle     
             before it is considered abandoned.     
             -->    
        <parameter>    
            <name>removeAbandonedTimeout</name>    
            <value>60</value>    
        </parameter>    
        <!-- Log a stack trace of the code which abandoned the dB     
             connection resources.     
             -->    
        <parameter>    
            <name>logAbandoned</name>    
            <value>true</value>    
        </parameter>    
    </ResourceParams>