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Tomcat中配置MySQL連接池

Posted on 2005-10-11 10:13 qiyadeng 閱讀(2707) 評論(0) 編輯收藏所屬分類: J2EE

1.把驅(qū)動拷貝到%TOMCAT_HOME%/common/lib目錄下
2.新建數(shù)據(jù)庫表，并向表中添加記錄

use test;
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create table testdata (
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id int not null auto_increment primary key,
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foo varchar(25),
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bar int);
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insert into testdata values(null, 'hello', 12345);
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3.在%TOMCAT_HOME%/config/server.xml文件中加入如下一段配置信息(在</Host>之前)

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<Context path="/WS4Motel" docBase="WS4Motel"
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debug="5" reloadable="true" crossContext="true">
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<!-- maxActive: Maximum number of dB connections in pool. Make sure you
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configure your mysqld max_connections large enough to handle
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all of your db connections. Set to 0 for no limit.
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-->
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<!-- maxIdle: Maximum number of idle dB connections to retain in pool.
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Set to -1 for no limit. See also the DBCP documentation on this
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and the minEvictableIdleTimeMillis configuration parameter.
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-->
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<!-- maxWait: Maximum time to wait for a dB connection to become available
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in ms, in this example 10 seconds. An Exception is thrown if
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this timeout is exceeded. Set to -1 to wait indefinitely.
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-->
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<!-- driverClassName: Class name for the old mm.mysql JDBC driver is
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org.gjt.mm.mysql.Driver - we recommend using Connector/J though.
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Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver.
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-->
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<!-- url: The JDBC connection url for connecting to your MySQL dB.
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The autoReconnect=true argument to the url makes sure that the
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mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
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connection. mysqld by default closes idle connections after 8 hours.
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-->
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<Resource name="jdbc/WS4Motel" auth="Container" type="javax.sql.DataSource"
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maxActive="100" maxIdle="30" maxWait="10000"
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username="root" password="83072674" driverClassName="com.mysql.jdbc.Driver"
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url="jdbc:mysql://localhost:3306/test?autoReconnect=true"/>
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</Context>
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4.寫個(gè)簡單程序測試下：

<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
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<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
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<sql:query var="rs" dataSource="jdbc/TestDB">
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select id, foo, bar from testdata
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</sql:query>
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<html>
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<head>
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<title>DB Test</title>
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</head>
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<body>
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<h2>Results</h2>
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<c:forEach var="row" items="${rs.rows}">
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Foo ${row.foo}<br/>
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Bar ${row.bar}<br/>
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</c:forEach>
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</body>
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</html>
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