Re: Tomcat - PostgreSQL - Cannot load JDBC driverclass"null"
От | Jim Wright |
---|---|
Тема | Re: Tomcat - PostgreSQL - Cannot load JDBC driverclass"null" |
Дата | |
Msg-id | 3F74F397.5090904@quick.cz обсуждение исходный текст |
Ответ на | Re: Tomcat - PostgreSQL - Cannot load JDBC driverclass"null" ("CRAIG GOLBY" <craig@golby.me.uk>) |
Список | pgsql-jdbc |
Hi Craig, CRAIG GOLBY wrote: >There are a number of other dirs under WebApps, those being "examples", >"tomcat-docs" and "webdav", plus a few backups or ROOT that I have >created at different stages of the build. > >There is also an admin.xml and manager.xml file in the webapps >directory, both have small amounts of information in them, not sure that >they have any bearing. You can either define web apps in server.xml or in files like these. You may well find these two useful in your current situation. Manager is for stopping, starting, restarting webapps and helps if you are making changes. Administrator allows you to set up datasources which is cool but strikes me as ambitious until you have got it working with: Connection db = DriverManager.getConnection( "jdbc:postgresql://host:port/database", username, password); Anyway, by default the ROOT web app just displays the tomcat test page which has links to the admin and manager web apps. If you don't have the tomcat test page (e.g. because you have broken the default config ;-)) then for tomcat 4 on RH 8.0 the above are at: http://localhost:8080/manager/html http://localhost:8080/admin until you break that too ;-) You will be asked to log in as a user defined in Tomcat/conf/tomcat-users.xml e.g.: <user username="admin" password="4gotenit" fullName="Adminstrator" roles="admin,manager"/> >>>>>>******************************************************* >>>>>>Server XML :- Tomcat/conf >>>>>>******************************************************* >>>>>><Context path="/DBTest" >>>>>> docBase="DBTest" >>>>>> debug="5" >>>>>> reloadable="true" >>>>>> crossContext="true"> I think this means that your web app is installed at Tomcat/webapps/DBTest assuming you have: <Host name="localhost" debug="0" appBase="webapps" ... earlier in the file. >>>>>> >>>>>>******************************************************* >>>>>>Web XML :- Tomcat/webapps/root/WEB-INF >>>>>>******************************************************* I think this is the wrong file. You probably also have this in server.xml: <Context path="" docBase="root" debug="0"/> which relates to Tomcat/webapps/root. I suggest you get it working by installing your web app in: Tomcat/webapps/DBTest/ Copy the "examples" web app if its there. Just change occurrences of "examples" to "DBTest" and install your own: Tomcat/webapps/DBTest/WEB-INF/web.xml. test classes in: Tomcat/webapps/DBTest/WEB-INF/classes and: Tomcat/webapps/DBTest/WEB-INF/lib/pg73jdbc3.jar BTW I recommend that on a development machine you eventually configure virtual hosts and keep your original tomcat default webapps installed on one e.g. http://tomcat/ and install your own stuff elsewhere. e.g. http://DBtest/. I'd be interested to know how you get on defining data sources. I've not tried. Cheers, Jim Wright -- Recently completed - Child Brain Injury Trust Admin System http://cbitdemo.paneris.org/ Urgently seeking paid work Java, Linux, XML and much more. http://be.webz.cz/
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