tomcat连接池

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:查看复制到剪切板打印
<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:查看复制到剪切板打印
<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中增加查看复制到剪切板打印
<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：查看复制到剪切板打印
<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：查看复制到剪切板打印
<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：查看复制到剪切板打印
<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，内容如下查看复制到剪切板打印
<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>