How can I get the "pageContext" object in jsp page?

Question

Hi everyone:
I want to get struts's DataSource object in jsp page.So I should get the PageContext object in jsp page.My code is:
///////////////////datatest.jsp///////////////////////////////////
     DataSource ds=(DataSource)pageContext.getAttribute(Action.DATA_SOURCE_KEY);
     conn=ds.getConnection();
          stm=conn.createStatement();
          rs=stm.executeQuery(insertsql);
Is right?But I get the "NullPointerException" error in Tomcat.The connection pool in struts-config.xml is:
<data-sources>
<data-source key="mydatasource">
<set-property property="autoCommit"
value="false"/>
<set-property property="description"
value="MyWebSite Data Source Configuration"/>
<set-property property="driverClass"
value="org.gjt.mm.mysql.Driver"/>
<set-property property="maxCount"
value="4"/>
<set-property property="minCount"
value="2"/>
<set-property property="password"
value="qijiashe"/>
<set-property property="url"
value="jdbc:mysql://localhost:3306/myweb"/>
<set-property property="user"
value="lyo"/>
</data-source>
</data-sources>
I can query the database in servlet.
I think the method that I get the context is not right.Had someone get the pagecontext in jsp page?help :(

Answer 1

Sorry I forgot that I had change the code:
DataSource ds=(DataSource)pageContext.getAttribute(Action.DATA_SOURCE_KEY);
     conn=ds.getConnection();
          stm=conn.createStatement();
          rs=stm.executeQuery(insertsql);
to the code:
DataSource ds=(DataSource)pageContext.getAttribute("mydatasource");
     conn=ds.getConnection();
          stm=conn.createStatement();
          rs=stm.executeQuery(insertsql);
mydatasource is the struts datasource in "struts-config.xml". I couldn't work