Hi,
I am a beginner of using jdbc, i use the tomcat4.1.x, mysql3.23.54 and it's jdbc driver 2.0.14. I place the drive <in jar file> in tomcat/commons/lib and configure the server.xml, web.xml and some testing coding. But there are some error like the following:
java.sql.SQLException: Cannot load JDBC driver class 'null'
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:529)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:312)
at foo.DBTest.init(DBTest.java:18)
at org.apache.jsp.test_jsp._jspService(test_jsp.java:48)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:136)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:204)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
of course its some of the error code and there are more.
Why I have this problems and how can I fix it? Can someone help me??
Thanks,
Tong
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I place my test.jsp at tomcat/webapps/DBTest and DBTest.java at tomcat/webapps/DBTest/WEB-INF/classes/foo
additional of the tomcat/conf/server.xml
<Resource name="TestDB" auth="Container" type="javax.sql.DataSource" description="MySQL TestDB"/>
<ResourceParams name="TestDB">
<parameter><name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter><name>maxActive</name><value>10</value></parameter>
<parameter><name>maxIdle</name><value>1</value></parameter>
<parameter><name>maxWait</name><value>10000</value></parameter>
<parameter><name>username</name><value>javauser</value></parameter>
<parameter><name>password</name><value>javadude</value></parameter>
<parameter>
<name>driverClassName</name>
<value>org.gjt.mm.mysql.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost:3306/javatest?autoReconnect=true</value>
</parameter>
</ResourceParams>
tomcat/webapps/DBTest/WEB-INF/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>
</web-app>