How to use the data retrieved from a servlet in the query statement present in a jsp file?

I am working on a project and I need to connect to a database from a jsp file. I have to use the data retrieved from a servlet in the where clause of the query. I am unable to do so correctly. Please post sample codes if possible.

Part of my code is:

//to retrieve data in jsp from servlet
<%! String[] staffData;%>
<% retrievedInfo = (ArrayList) request.getAttribut开发者_运维知识库e("filledInfo");%>
<% staffData = (String[]) retrievedInfo.get(0);%>

//After establishing connection:
ResultSet rs = stmt.executeQuery("Select * from EDUCATION where STAFF_NO= <% staffData[0] %>");

Please help me. Please tell me where to make the changes.

Thank you in advance.

Your executeQuery needs to be in a scriptlet tag and you can refer to staffData[0] directly in the code

//to retrieve data in jsp from servlet
<%! String[] staffData;%>
<% retrievedInfo = (ArrayList) request.getAttribute("filledInfo");%>
<% staffData = (String[]) retrievedInfo.get(0);%>

<%
//After establishing connection:
ResultSet rs = stmt.executeQuery("Select * from EDUCATION where STAFF_NO = ' "+staffData[0]+" '   ");


%>

<%
 //then iterate through the resultset...
 while(rs.next()) {
        out.print(rs.getObject(1).toString());
       //...etc..
      }
%>

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