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maheshs
retrive data from database using jsp in struts?
1 Answer(s)      3 years ago
Posted in : Struts


*search.jsp*

<%@taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <%@taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>

<center>SearchProductForm></center> ProductId:

SearchFB.java

package stan.info; import javax.servlet.http.*; import org.apache.struts.action.*; import org.apache.struts.action.ActionErrors; import org.apache.struts.validator.DynaValidatorForm;

public class SearchFB extends DynaValidatorForm { }

SearchDTO.java

package stan.info;

public class SearchDTO {

String pid;

public void setPid(String pid) { this.pid=pid; } public String getPid() { return pid; } }

SearchVO.java

package stan.info;

public class SearchVO {

String pid; String pname; String price;

public void setPid(String pid) { this.pid=pid; } public String getPid() { return pid; } public void setPname(String pname) { this.pname=pname; } public String getPname() { return pname; } public void setPrice(String price) { this.price=price; } public String getPrice() { return price; } }

SearchDAO.java

package stan.info;

import java.sql.*; import java.util.*;

public class SearchDAO {

public ArrayList searchProduct(SearchDTO sdto) { String query="select * from product";

if(sdto.getPid()==null || !sdto.getPid().equals("")) { query=query+" "+"where pid="+sdto.getPid(); } System.out.println("Query is:"+query); ArrayList a=new ArrayList();

try { DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","bms","smk"); Statement stmt=con.createStatement(); ResultSet rs=stmt.executeQuery(query); while(rs.next()) { SearchVO svo=new SearchVO(); svo.setPid(rs.getString(1)); svo.setPname(rs.getString(2)); svo.setPrice(rs.getString(3)); a.add(svo); } }catch(Exception e) { e.printStackTrace(); } System.out.println("Size:"+a.size()); return a; } }

SearchJB.java

package stan.info;

import java.util.*;

public class SearchJB {

public void searchProduct(SearchDTO sdto) {

SearchDAO sdao=new SearchDAO(); sdao.searchProduct(sdto); } }

SearchAction.java

package stan.info;

import javax.servlet.http.*; import org.apache.struts.action.*;

public class SearchAction extends Action {

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

SearchFB sfb=(SearchFB)form; SearchVO svo=new SearchVO(); svo.setPid((String)sfb.get("pid")); svo.setPname((String)sfb.get("pname")); svo.setPrice((String)sfb.get("price"));

SearchDTO sdto=new SearchDTO(); SearchJB sjb=new SearchJB(); sjb.searchProduct(sdto); return mapping.findForward("success"); } }

success.jsp

<%@taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <%@taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> <%@page isELIgnored="false"%>

The following details are stored in DB
{pid}
{pname}
{price}


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View Answers

February 23, 2014 at 1:01 PM


The above code showing error like this:

javax.servlet.ServletException: java.lang.ClassCastException: org.apache.struts.validator.DynaValidatorForm cannot be cast to org.mat.search.SearchFB org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:286) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) javax.servlet.http.HttpServlet.service(HttpServlet.java:728)



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