please add these code in struts-config.xml, which database you are going to config:
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Java Code
<data-sources>
<data-source key="musiccollection" type="org.apache.commons.dbcp.BasicDataSource">
<set-property property="description" value="Music Collection Database"/>
<set-property property="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
<set-property property="username" value="root"/>
<set-property property="password" value=""/>
<set-property property="url" value="jdbc:oracle:thin:@localhost:1521: musiccollection" />
<set-property property="maxCount" value="3"/>
<set-property property="minCount" value="2"/>
</data-source>
</data-sources>
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Java Code
<data-sources>
<data-source key="musiccollection" type="org.apache.commons.dbcp.BasicDataSource">
<set-property property="description" value="Music Collection Database"/>
<set-property property="driverClassName" value="com.mysql.jdbc.Driver"/>
<set-property property="username" value="root"/>
<set-property property="password" value=""/>
<set-property property="url" value="jdbc:mysql://localhost/musiccollection" />
<set-property property="maxCount" value="3"/>
<set-property property="minCount" value="2"/>
</data-source>
</data-sources>