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Hibernate

  1. Advantage of Hibernate over JDBC
  2. Hibernate Setup with an web Application
  3. First Hibernate Application
  4. Hibernate mapping with Database TABLE
  5. Hibernate Data Type-Java Data Type - SQL Data Type mapping
  6. One to Many Relation in Hibernate
  7. One to Many Relation in Hibernate bi-directional
  8. Many to Many Relation in Hibernate
  9. HQL: The Hibernate Query Language
  10. Criteria Queries
  11. Criteria Queries : Equal (eq), Not Equal(ne), Less than (le), greater than (gt),greater than or equal(ge) and Ordering the results
  12. Criteria Queries: And OR conditions
  13. Hibernate generator to generate id (primary key)
  14. prevent concurrent update in Hibernate,slate object updatation in Hibernate,version checking in Hibernate

    Struts


  1. Model View Controller (MVC)
  2. Model View Controller (MVC)
  3. Struts Flow-How Struts Works?
  4. Struts Tutorial - Struts Setup- First Struts Action class setup
  5. Message Resources
  6. Validation Framework
  7. Validation Framework-client side
  8. ForwardAction
  9. IncludeAction
  10. DispatchAction
  11. LookupDispatchAction
  12. DynaActionForm
  13. DynaActionForm
  14. Struts Tutorial - Mutli-click prevention using struts tokens-Prevent Duplicate Submission
  15. Logic Iterate Map and List

JSP


  1. JSP Tutorial
  2. Introduction to JSP
  3. JSP Comments
  4. JSP Syntax
  5. JSP Scripting Elements :Scriptlet, expression, declaration
  6. JSP Directives
  7. implicit objects in JSP
  8. JSP Actions
  9. Introduction to JSP
  10. jsp:useBean
  11. The jsp:setProperty Action
  12. The jsp:getProperty Action
  13. Introduction to JSP

Spring


  1. Spring Tutorial
  2. Introduction to Spring
  3. Benefits of Using Spring Framework
  4. Inversion of Control in Spring
  5. Introduction to BeanFactory
  6. Dependency Injection in Spring
  7. Collections Setter Injection
  8. Bean Scopes in Spring
  9. Spring IOC Setup Step by Step
  10. Bean Lifecycle in Spring
  11. ApplicationContext
  12. MessageSources in Spring
  13. Web Spring MVC framework
  14. Developing Your First Spring Web Application
  15. Developing Your Second Spring Web Application with Spring Form
  16. Developing Your First Spring Web Application with Spring Validation Framework with Code Example
  17. Spring integration with Hibernate

Struts Tutorial -- Code Examples

Validation Framework-Client Side

Validation Framework provides the functionality to validate the form data. It can be use to validate the data on the client side. Errors will be displayed like java script.

Struts has a class called ValidatorForm in org.apache.struts.validator package. This is a subclass of ActionForm and implements the validate() method. The validate() method invokes the Commons Validator, executes the rules using the two xml files (validator-rules.xml and validation.xml) and generates ActionErrors using the Message Resources defined in the struts-config.xml.
validator-rules.xml :
The validator-rules.xml file defines the Validator definitions available for a given application.
The validator-rules.xml file acts as a template, defining all of the possible Validators that are available to an application.
validation.xml File :
The validation.xml file is where you couple the individual Validators defined in the validator-rules.xml to components within your application.

Follow the below steps to setup Validation Framework in Struts (server side validation ).

Step 1. Add validator plugin into struts-config.xml

<plug-in className="org.apache.struts.validator.ValidatorPlugIn"> <set-property property="pathnames" value="/WEB-INF/validator-rules.xml,
/WEB-INF/validation.xml"/>
</plug-in>

Step 3. In the JSP page (EmpForm.jsp)- Add onsubmit="return validateempForm(this);" and <html:javascript formName="empForm"/> for Client Side Java Script Validation.

<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html:form>
<html:form action="/submitForm.do" method="post" onsubmit="return validateempForm(this);">
<html:errors/> // this is for error message from resource bundle in JSP
<html:text property="firstName" size="20" maxlength="50"/>
<html:text property="lastName" size="20" maxlength="50"/>
<html:submit >Save</html:submit>
<!-- Begin Validator Javascript Function-->
<html:javascript formName="empForm"/>
<!-- End of Validator Javascript Function-->
</html:form>

Step 4. Add Message Resources location in struts-config.xml

<!-- Message Resources --> <message-resources parameter="application_resource"/>

Step 5. In the the Resource Bundle. application_resource.properties file //Here you can add localization.

label.firstName=First Name
label.lastName=Last Name
errors.required={0} is required.

Step 7. In the EmpForm

package com.techfaq.form;
public class EmpForm extends ValidatorForm {
int empId;
String firstName;
String lastName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getEmpId() {
return empId;
}
public void setEmpId(int empId) {
this.empId = empId;
}
}

Step 6. In the validation.xml - The validation.xml file is where you couple the individual Validators defined in the validator-rules.xml to components within your application

<form-validation>
<formset>
<form name="empForm">
<field property="firstName" depends="required">
<arg0 key="label.firstName"/>
</field>
<field property="lastName" depends="required"> <arg0 key="label.lastName"/>
</field>
</form>
</formset>
</form-validation>

Step 6. In the validator-rules.xml - The validator-rules.xml file defines the Validator definitions available for a given application.

<form-validation>
<global>
<validator
name="required"
classname="org.apache.struts.util.StrutsValidator"
method="validateRequired"
methodparams="java.lang.Object,
org.apache.commons.validator.ValidatorAction,
org.apache.commons.validator.Field,
org.apache.struts.action.ActionErrors,
javax.servlet.http.HttpServletRequest"
msg="errors.required"/>
</global>
</form-validation>

Step 5. Add Action mapping and form entry into the stuts-confix.xml and validate="true" is for validation framework to validate the form input.

<?xml version="1.0" encoding="UTF-8"?>
<!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>
<form-beans>
<form-bean name="EmpForm" type="com.techfaq.form.EmpForm"> </form-bean>
</form-beans>
<action-mappings>
<action path="/submitForm"
type="com.techfaq.action.EmpAction"
name="EmpForm"
scope="request"
validate="true" // This need for validation framework to validate the form input
input="EmpForm.jsp">
<forward name="success"
path="success.jsp"/>
<forward name="failure" path="failure.jsp" />
</action>
</action-mappings>
</struts-config>

Now in the browser type http://localhost:8080/testApp/EmpForm.jsp

Don't Enter firstName and lastName in the text box and submit the "Save" BUTTON. the RequestProcessor checks for the validateattribute in the ActionMapping.
If the validate is set to true, the RequestProcessor invokes the validate() method of the ValidatorForm instance.
If Validate fail the RequestProcessor looks for the input attribute and return to JSP page mentioned in input tag.
If Validate pass goto Action Class execute() method..
If Validate fail , In the browser (EmpForm.jsp) you can see. Java Script pop up Message:

First Name is required.
Last Name is required.

In the empForm firstName and lastName are the required filed. So in the above configuration you can see we add for both firstName and lastName. You can see depends="required" - "required" property is defind in validator-rules.xml. In the resource bundle : application_resource.propertis file
label.firstName=First Name
label.lastName=Last Name
#Error messages used by the Validator
errors.required={0} is required.
{0} will be filled by (First Name or Last Name) because validation.xml above configuration you have defind
<arg0 key="label.lastName"/>. and <arg0 key="label.lastName"/>.

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