tomcat4.1.24+Mysql连接池配法

tomcat4.1.24+Mysql连接池配法

1.修改CATALINA_HOME\conf\server.xml

<!-- Tomcat Root Context -->

<Context path="" docBase="ROOT" debug="0">


<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_DBTest_log." suffix=".txt"
timestamp="true"/>

<Resource name="jdbc/MysqlDB"
auth="Container"
type="javax.sql.DataSource"/>

<ResourceParams name="jdbc/MysqlDB">
<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>111111</value>
</parameter>

<!-- Class name for mm.mysql JDBC driver -->
<parameter>
<name>driverClassName</name>
<value>org.gjt.mm.mysql.Driver</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:mysql://localhost:3306/test?useUnicode=true&amp;characterEnco ding=GBK</value>

<!--Here must use &amp; not use  & -->
</parameter>
</ResourceParams>



</Context>



2.修改webapps/ROOT/INF-WEB/web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<description>MySQL Test App</description>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/MysqlDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>

3.测试用的testdb.jsp内容:

<%@ page contentType="text/html;charset=GBK"%>
<%@ page import= "java.sql.* " %>
<%@ page import= "javax.naming.* "%>
<%
try{

Context initCtx = new InitialContext();

Context ctx = (Context) initCtx.lookup("java:comp/env");
//获取连接池对象

Object obj = (Object) ctx.lookup("jdbc/MysqlDB");

//类型转换

javax.sql.DataSource ds = (javax.sql.DataSource)obj;

Connection conn = ds.getConnection();

Statement stmt = conn.createStatement();

String strSql = " insert into test(id,name) values('007','hello,中国!') ";

stmt.executeUpdate(strSql);

strSql = " select id,name from test ";

ResultSet rs = stmt.executeQuery(strSql);
while(rs.next()){

out.println(rs.getString(1));

out.println(rs.getString(2)+"<BR>");

}
conn.close();

}catch(Exception ex){

ex.printStackTrace();
throw new SQLException("cannot get Connection pool.");
}


%>
<hr>


4.最后浏览 http://localhost/testdb.jsp

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