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毕业设计即将开始,今天用了tomcat-6.0.10成功配置了连接池。
离楼主提问的时间很久了,还是贴出来,希望还有点用处。
步骤几乎完全参考官方文档(http://tomcat.apache.org/tomcat-6.0-doc/jndi-resources-howto.html)。
所以这里只提示两点:
1、mysql的JDBC驱动包要下载放到“tomcat-6.0.10/lib”目录下
2、测试程序用到了JSTL,所以也要下载JSTL包。
3、Context 标签是放在Host之间。
PS:如果按照以下步骤还不成功,可以留下Email,我把自己配置成功的打包发过去。
MySQL DBCP Example
0. Introduction
Versions of MySQL and JDBC drivers that have been reported to work:
MySQL 3.23.47, MySQL 3.23.47 using InnoDB,, MySQL 3.23.58, MySQL 4.0.1alpha
Connector/J 3.0.11-stable (the official JDBC Driver)
mm.mysql 2.0.14 (an old 3rd party JDBC Driver)
Before you proceed, don't forget to copy the JDBC Driver's jar into $CATALINA_HOME/lib.
1. MySQL configuration
Ensure that you follow these instructions as variations can cause problems.
Create a new test user, a new database and a single test table. Your MySQL user must have a password assigned. The driver will fail if you try to connect with an empty password.
- mysql> GRANT ALL PRIVILEGES ON *.* TO javauser@localhost
- -> IDENTIFIED BY 'javadude' WITH GRANT OPTION;
- mysql> create database javatest;
- mysql> use javatest;
- mysql> create table testdata (
- -> id int not null auto_increment primary key,
- -> foo varchar(25),
- -> bar int);
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Note: the above user should be removed once testing is complete!
Next insert some test data into the testdata table.
- mysql> insert into testdata values(null, 'hello', 12345);
- Query OK, 1 row affected (0.00 sec)
- mysql> select * from testdata;
- +----+-------+-------+
- | ID | FOO | BAR |
- +----+-------+-------+
- | 1 | hello | 12345 |
- +----+-------+-------+
- 1 row in set (0.00 sec)
- [/quote]
- 2. server.xml configuration
- Configure the JNDI DataSource in Tomcat by adding a declaration for your resource to $CATALINA_HOME/conf/server.xml.
- Add this in between the </Context> tag of the examples context and the </Host> tag closing the localhost definition. If there is no such tag, you can add one as illustrated in the Context and Host configuration references, and repeated below for your convenience.
-
- [code]<Context path="/DBTest" docBase="DBTest"
- debug="5" reloadable="true" crossContext="true">
- <Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
- maxActive="100" maxIdle="30" maxWait="10000"
- username="javauser" password="javadude" driverClassName="com.mysql.jdbc.Driver"
- url="jdbc:mysql://localhost:3306/javatest?autoReconnect=true"/>
- </Context>
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3. web.xml configuration
Now create a WEB-INF/web.xml for this test application.
- <web-app xmlns="http://java.sun.com/xml/ns/j2ee"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
- http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
- version="2.4">
- <description>MySQL Test App</description>
- <resource-ref>
- <description>DB Connection</description>
- <res-ref-name>jdbc/TestDB</res-ref-name>
- <res-type>javax.sql.DataSource</res-type>
- <res-auth>Container</res-auth>
- </resource-ref>
- </web-app>
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4. Test code
Now create a simple test.jsp page for use later.
-
- <%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
- <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
- <sql:query var="rs" dataSource="jdbc/TestDB">
- select id, foo, bar from testdata
- </sql:query>
- <html>
- <head>
- <title>DB Test</title>
- </head>
- <body>
- <h2>Results</h2>
-
- <c:forEach var="row" items="${rs.rows}">
- Foo ${row.foo}<br/>
- Bar ${row.bar}<br/>
- </c:forEach>
- </body>
- </html>
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That JSP page makes use of JSTL's SQL and Core taglibs. You can get it from Sun's Java Web Services Developer Pack or Jakarta Taglib Standard 1.1 project - just make sure you get a 1.1.x release. Once you have JSTL, copy jstl.jar and standard.jar to your web app's WEB-INF/lib directory.
Finally deploy your web app into $CATALINA_HOME/webapps either as a warfile called DBTest.war or into a sub-directory called DBTest
Once deployed, point a browser at http://localhost:8080/DBTest/test.jsp to view the fruits of your hard work. |
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