tomcat中的几种连接池配置

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" />

<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>

<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
4.测试程序

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"/>

<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"/>

<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"/>

<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"/>

<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>