//***Please note that I am using DispatchAction not
Action***
Please tell me how to populate fields in a form with
data retrieved from a database table.
Please note that I am particular about how to do this
using Struts tags etc.
//***Please also note that I am using DispatchAction
not Action***
Process flow
============
User presses "get customer" button in customer.jsp,
customer.jsp calls, customerAction.getCustomer,
customerAction.getCustomer method executes
dbInterface.getCustomer.
JSP FILES:
==========
customer.jsp:
=============
<%@ page language="java" %>
<%@ taglib uri="/WEB-INF/struts-html.tld"
prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld"
prefix="logic" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld"
prefix="bean" %>
<html>
<head>
<title><bean:message key="fieldL.title" /></title>
</head>
...........
</table>
<html:form action="/customer"
name="CustomerForm"
type="com.cargo.gen.CustomerForm" >
<table width="500" border="0">
<tr>
<td width="54"><bean:message
key="fieldL.customerNo"/>:</td>
<td width="37"><html:text property="customerNo"
maxlength="5" size="5"/></td>
<td width="54"><bean:message key="fieldL.firstName"
/>:</td>
<td width="37"><html:text property="firstName" /></td>
<td width="54"><bean:message key="fieldL.lastName"
/>:</td>
<td width="37"><html:text property="lastName" /></td>
</tr>
...
</table>
<html:hidden property="methodToExecute"
value="error"/>
<SCRIPT>function set(target)
{document.forms[0].methodToExecute.value=target;}</SCRIPT>
<html:submit on click="set('regCustomer')">Register
Customer</html:submit>
<html:submit on click="set('getCustomer')">Get
Customer</html:submit>
<html:submit on click="set('updateCustomer');">Save
Changes</html:submit>
</html:form>
</body>
</html>
struts-config.xml file:
=======================
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts
Configuration 1.1//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd";>
<struts-config>
<!-- ==================================== Data Source
Configuration -->
<data-sources>
<data-source
type="org.apache.commons.dbcp.BasicDataSource">
<set-property property="driverClassName"
value="com.mysql.jdbc.Driver" />
<set-property property="url"
value="jdbc:mysql://localhost/cargo" />
<set-property property="username" value="ola" />
<set-property property="password" value="ola" />
</data-source>
</data-sources>
<!-- ======================================== Form
Bean Definitions -->
<form-beans>
<form-bean name="customerForm"
type="com.cargo.gen.CustomerForm"/>
<!-- sample form bean descriptor for a DynaActionForm
<form-bean
name="logonForm"
type="org.apache.struts.action.DynaActionForm">
<form-property
name="username"
type="java.lang.String"/>
<form-property
name="password"
type="java.lang.String"/>
end sample -->
</form-beans>
<global-forwards>
<forward name="cust" path="/customer"/>
</global-forwards>
<action-mappings>
<!-- Default "Welcome" action -->
<!-- Forwards to Welcome.jsp -->
<action path="/customer"
type="com.cargo.gen.CustomerAction"
name="customerForm"
scope="request"
parameter="methodToExecute">
<forward name="success" path="/jsp/customer.jsp"/>
<forward name="failure" path="/jsp/failure.jsp"/>
</action>
</action-mappings>
<message-resources
parameter="com.cargo.resources.application"/>
</struts-config>
Action Class:
=============
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import java.util.ArrayList;
import java.util.Iterator;
//***Please note that I am using DispatchAction not
Action***
public class CustomerAction extends DispatchAction {
public ActionForward getCustomer(ActionMapping
mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
));
CustomerForm customerForm = (CustomerForm) form;
copyBeanDataToForm(customerForm,
dbInterface.getCustomer( getDataSource(request),
customerForm ) );
return mapping.findForward("success");
}
...
...
}
//***Please note that I am using DispatchAction not
Action***
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