java数据库和jar文件

Question

we have a standalone project. we are using Java DB and we are writting our code on netbeans. we can conncet to DB with using IDE and we can do what we want but when we make it jar file it couldnt connect to database . how can we solve this problem thanks

Answer 1

The database driver has to be in classpath when you run your application as JAR. When you start the application in eclipse the driver is found in the build path. That's why your application works here.

Another solution would be to embed the driver's JAR in your JAR file.

Answer 2

first check where is your jar located,most probably it is outside the project thats why error occurs. put them in your project and set path properly in classpath file like :

<classpathentry exported="true" kind="lib" path="WEB-INF/lib/castor-1.1.2-commons.jar"/>

right now if you see your path is look like :

<classpathentry exported="true" kind="lib" path="D:/apache-tomcat-6.0.14/apache-tomcat-6.0.14/lib/servlet-api.jar"/>

which is wrong.

provide your classpath file and error log if still error occurs.