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Struts: DB Connection

Lalit Vora
Ranch Hand

Joined: Jun 22, 2006
Posts: 37
Hi, I want to connect to DB for extracting data from oracle DB. Please guide me how to connect to DB to retrieve data?
Carla carmona
Greenhorn

Joined: Oct 14, 2004
Posts: 14
Hi there !

Try this link and let me know if is of any good to you.
http://struts.apache.org/struts-doc-1.1/faqs/database.html

Jose Cardoso Jr
Lalit Vora
Ranch Hand

Joined: Jun 22, 2006
Posts: 37
No, I am getting same error every time This is my struts config.xml

I am getting Error HTTP 404 servlet action not available. If i am not using dtasource and changing action class my application runs without datasource and gets hard coded value from getquote method. I want value from db


<struts-config>

<data-sources>
<data-source
type="org.apache.common.dbcp.BasicDataSource">

<set-property property="driverClassName"
vlaue="oracle.jdbc.driver.OracleDriver"/>

<set-property property="url"
vlaue="jdbc racle:thin:
@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=myhost)(PORT=1521))(CONNECT_DATA=(SID=orcl)))"/>


<set-property property="username"
vlaue="scott"/>
<set-property property="password"
vlaue="tiger"/>

</data-source>
</data-sources>

<form-beans>

<form-bean name="lookupForm"
type="ch03.LookupForm"/>

</form-beans>


<action-mappings>

<action path="/Lookup"
type="ch03.LookupAction"
name="lookupForm">

<forward name="success" path="/quote.jsp"/>
<forward name="failure" path="/index.jsp"/>
</action>

</action-mappings>
<message-resources parameter="MessageResources" />

</struts-config>


This is my action class

public class LookupAction extends Action
{
public Double getQuote(String symbol,
HttpServletRequest request)
throws Exception

{

Double price=null;
Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
DataSource dataSource=null;

try
{

dataSource = getDataSource(request);
conn= dataSource.getConnection();
stmt= conn.createStatement();
rs= stmt.executeQuery("select * from stocks where" + "symbol='" + symbol +"'");

if (rs.next())
{
double tmp=0;
tmp = rs.getDouble("price");

price= new Double(tmp);
System.err.println("price:" +price);

}

else
{
System.err.println("Symbol not found returning null");
}

}

catch(SQLException e)
{
System.err.println(e.getMessage());
}

finally
{
if (rs!= null)
{

try
{
rs.close();
}

catch (SQLException sqle)
{
System.err.println(sqle.getMessage());
}
rs=null;
}

if (stmt!=null)
{

try{ stmt.close(); }

catch (SQLException sqle)
{
System.err.println(sqle.getMessage());
}
stmt=null;
}

if (conn!=null)
{
try{ conn.close(); }

catch (SQLException sqle)
{
System.err.println(sqle.getMessage());
}
conn=null;
}


}



return price;
}


public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception{


Double price=null;
String target=new String("success");

if(form !=null)
{

LookupForm lookupForm = (LookupForm) form;

String symbol = lookupForm.getSymbol();


price = getQuote(symbol,request);

}

if(price == null)
{
target = new String("failure");
}

else
{
request.setAttribute("PRICE",price);
}

return(mapping.findForward(target));
}


}



Please Guide me its very urgent. I also want to know do we require any driver to place anywhere? Also without using struts config can i directly connect to DB? Please help me

Thanks
Lalit
NV Krishna
Greenhorn

Joined: Mar 23, 2005
Posts: 14
<struts-config>

<data-sources>
<data-source
type="org.apache.common.dbcp.BasicDataSource">

<set-property property="driverClassName"
vlaue="oracle.jdbc.driver.OracleDriver"/>

<set-property property="url"
vlaue="jdbc racle:thin:
@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=myhost)(PORT=1521))(CONNECT_DATA=(SID=orcl)))"/>

Hi,

Place the classes12.jar in the classpath (if you are using oralce).

change the struts-config.xml in <data-source> section, like this.

<set-property property="url" value="jdbc racle:@thin:myhost:1521 rcl/>

hope it will work.
 
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subject: Struts: DB Connection