tomcat5.0与tomcat5.5的数据库连接池jndi配置区别

在tomcat5.5版本以前，可以说jndi配置相对是比较复杂的，而且据网友说用tomcat5.0的控制台配置数据库连接池经常有问题，而且文档写得又不详细。

tomcat5.5出来后，jndi的配置方法是大大地节省，而且很简洁，个人觉得比以前的版本好很多。这里大概给出一个配置例子。tomcat数据库连接池jndi配置有两种，一种是全局的，一种是context的，下面主要是讲全局的，并且以一个实例jdbc/byisdb为例子

一、tomcat5.0配置方法

1、首先在server.xml里面配置，找到下面的配置

<GlobalNamingResources>
</GlobalNamingResources>

2、在里面增加一个Resource

<Resource name="jdbc/byisdb"

auth="Container"

type="javax.sql.DataSource"/>

3、在下面增加属性

<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.

-->

<name>maxActive</name>

</parameter>

<!-- Maximum number of idle dB connections to retain in pool.

Set to -1 for no limit. See also the DBCP documentation on this

and the minEvictableIdleTimeMillis configuration parameter.

-->

<name>maxIdle</name>

</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.

-->

<name>maxWait</name>

</parameter>

<name>username</name>

</parameter>

<name>password</name>

</parameter>

<!-- Class name for the old mm.mysql JDBC driver - uncomment this entry and comment next

if you want to use this driver - we recommend using Connector/J though

<name>driverClassName</name>

<value>org.gjt.mm.mysql.Driver</value>

</parameter>

-->

<name>driverClassName</name>

<value>oracle.jdbc.driver.OracleDriver</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.

-->

<value>jdbc:oracle:thin:@192.168.1.210:1521:byisdb</value>

</parameter>

</ResourceParams>

4、在你的应用的web.xml里面增加

<resource-ref>

<description>postgreSQL Datasource example</description>

<res-ref-name>jdbc/byisdb</res-ref-name>

<res-type>javax.sql.DataSource</res-type>

<res-auth>Container</res-auth>

</resource-ref>

OK,到此配置完毕，可以用下面的几段代码进行测试

Context initContext = new InitialContext();

Context envContext = (Context)initContext.lookup("java:/comp/env");

DataSource ds = (DataSource)envContext.lookup("jdbc/byisdb");

Connection conn = ds.getConnection();

out.println("conn is:"+conn);

二、tomcat5.5配置

1、打开conf/context.xml里面
添加下面的配置

2在你的应用的web.xml里面增加

<resource-ref>

<description>postgreSQL Datasource example</description>

<res-ref-name>jdbc/byisdb</res-ref-name>

<res-type>javax.sql.DataSource</res-type>

<res-auth>Container</res-auth>

</resource-ref>

同样，可以用上面的代码进行测试。

posted on 2006-08-11 14:03 jspark 阅读(2929) 评论(1) 编辑收藏

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