Java Interview Answers: Top Most Struts 2.x Tags Demo code

This example shows how to use struts 2 tags:

Struts 2 : Check box list
Struts 2: Select
Struts 2: File
Struts 2: Combo Box
Struts 2: Option Transfer Select
Struts 2: Updown Select
Struts 2: Double Select

(All these tags are available in result.jsp)

Struts 2: iterator
Struts 2: If else

(These tags are available in iterator_tag.jsp )

Struts 2: Dynamic Dispatch

( These tags examples are available in dynamic_dispatch_demo.jsp)

Struts 2: Action Message

( These tags examples are available in success.jsp)

1) Create a Dynamic Web Project
2) Create the following jsp pages under WebContent folder

index.jsp
result.jsp
dynamic_dispatch_demo.jsp
dispatch_success.jsp
dispatch_demo.jsp
iterator_tag.jsp
success.jsp

3) Create the Action Class in src folder

DynamicDispatchAction.java
IteratorTagAction.java
SaveUserAction.java
ShowTagsAction.java
UserDispatchAction.java

4) Map the actions and jsp in struts.xml under src folder

struts.xml
web.xml

index.jsp

<html>

<body>

<a href="showTags">Click here to view tags demo</a><br>

<a href="dispatch_demo.jsp">Click here to view Dispatch Action demo</a><br>

<a href="iteratorTag">Iterator TAG demo</a><br>

</body>

</html>

result.jsp

<%@ taglib uri="/struts-tags" prefix="s"%>

<html>
<body>

<h1>Welcome to Struts2 tags demo</h1>
<s:actionerror />

<s:form action="saveMyUser">
<s:textfield name="userName" label="UserName" />
<br>
<s:password name="password" label="Password" />
<br>
<s:textarea name="address" label="Address" />
<br>
<s:radio name="status" label="Status" list="{'Approved','UnApproved'}" />
<br>

<s:radio name="country" label="Country" list="countries"
value="{'UK'}" />
<br>

<s:checkboxlist list="countries" name="countryCheck"
label="CountrWithCheckbox" value="{'USA','Srilanka'}"></s:checkboxlist>
<s:label name="hello" value="Hello How are you"></s:label>

<s:select list="countries" name="countrySelect"
label="CountryWithSelectBox"></s:select>
<br>

<s:file name="myFIle" label="SelectFile"></s:file>

<s:combobox list="countries" name="comboBox"
label="CountryWithComboBox"></s:combobox>

<s:optiontransferselect label="Employee Records"
name="leftSideEmployeeRecords" leftTitle="LeftSide"
rightTitle="selected employees"
list="{'Deepak Kumar', 'Sushil Kumar','Vinod Kumar','Deepak Monthy',
'Deepak Mihanti', 'Sushil Kumar', 'Ravi Kant Kumar'}"
headerKey="headerKey" headerValue="--- Please Select ---"
doubleName="rightSideEmployeeRecords"
doubleList="{'Amar Deep Patel', 'Amit Kumar','Chandan Kumar',
'Noor Kumar','Tammana Kumari'}"
doubleHeaderKey="doubleHeaderKey"
doubleHeaderValue="--- Please Select ---" />

<s:updownselect
list="#{'01':'January','02':'February','03':'March','04':'April','05':'May','06':'June','07':'July','08':'August','09':'September','10':'October','11':'November','12':'December'}"
name="daysname" headerKey="1" headerValue="-- Please Select --"
moveUpLabel="Move Up" moveDownLabel="Move Down"
selectAllLabel="Select All" />

<s:doubleselect label="Select Item"
headerValue="--- Please Select ---" headerKey="1"
list="{'Color','Fruits','items'}" doubleName="dishes"
doubleList="top == 'Color' ? {'Black','Green','White',
'Yellow','Red','Pink'} : (top == 'Fruits' ? { 'Apple','Banana','Grapes','Mango'}: {'pen','laptop','mobile'})" />

<s:submit value="SaveUser"></s:submit>
</s:form>

</body>
</html>

dispatch_demo.jsp

<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
<body>

<s:form action="saveUser">
<s:submit value="SaveUser"/>
</s:form>

<s:form action="updateUser">
<s:submit value="UpdateUser"/>
</s:form>

<s:form action="deleteUser">
<s:submit value="DeleteUser"/>
</s:form>

<s:form action="listUser">
<s:submit value="ListUser"/>
</s:form>
</body>
</html>

dynamic_dispatch_demo.jsp

<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
<body>

<s:form action="saveUser">
<s:submit value="SaveUser"/>
</s:form>

<s:form action="updateUser">
<s:submit value="UpdateUser"/>
</s:form>

<s:form action="deleteUser">
<s:submit value="DeleteUser"/>
</s:form>

<s:form action="listUser">
<s:submit value="ListUser"/>
</s:form>
</body>
</html>

dispatch_success.jsp

<html>
<body>

<h1>Request is dispatched successfully</h1>
</body>
</html>

success.jsp

<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
<body>
<h1> Data is saved successfully</h1>
<s:actionmessage/>
</body>
</html>

ShowTagsAction.java

import java.util.ArrayList;
import java.util.List;

public class ShowTagsAction {
List<String> countries;
List<User> userList;

public List<User> getUserList() {
return userList;
}

public void setUserList(List<User> userList) {
this.userList = userList;
}

public String execute() throws Exception {
countries = new ArrayList<String>();

countries.add("India");
countries.add("USA");
countries.add("UK");
countries.add("Kanada");
countries.add("Srilanka");

return "success";
}

public List<String> getCountries() {
return countries;
}

public void setCountries(List<String> countries) {
this.countries = countries;
}
}

UserDispatchAction.java

public class UserDispatchAction {

public String save(){

System.out.println("save method of DispatchAction ");

return "success";

}

public String delete(){

System.out.println("delete method of DispatchAction ");

return "success";

}

public String update(){

System.out.println("update method of DispatchAction ");

return "success";

}

public String list(){

System.out.println("list method of DispatchAction ");

return "success";

}

DynamicDispatchAction.java

public class DynamicDispatchAction {

public String save(){

System.out.println("save method of DispatchAction ");

return "success";

}

public String delete(){

System.out.println("delete method of DispatchAction ");

return "success";

}

public String update(){

System.out.println("update method of DispatchAction ");

return "success";

}

public String list(){

System.out.println("list method of DispatchAction ");

return "success";

}

SaveUserAction.java

import java.util.ArrayList;

import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

public class SaveUserAction extends ActionSupport{

private String userName;

private String password;

private String address;

List<String> countries;

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

public String execute() throws Exception {

System.out.println("UserName = "+userName);

System.out.println("Password = "+password);

System.out.println("Address = "+address);

if(userName.equals(password)){

List<String> messages = new ArrayList<String>();

messages.add("Data sent to DB");

setActionMessages(messages);

return "success";

}else{

List<String> errors = new ArrayList<String>();

errors.add("Data is invalid");

setActionErrors(errors);

countries = new ArrayList<String>();

countries.add("India");

countries.add("USA");

countries.add("UK");

countries.add("Kanada");

countries.add("Srilanka");

return "input";

}

public List<String> getCountries() {

return countries;

}

public void setCountries(List<String> countries) {

this.countries = countries;

}

IteratorTagAction.java

import java.util.ArrayList;

import java.util.List;

public class IteratorTagAction {

List<String> countries;

List<User> userList;

public String execute() throws Exception {

countries = new ArrayList<String>();

countries.add("India");

countries.add("USA");

countries.add("UK");

countries.add("Canada");

countries.add("Srilanka");

userList = new ArrayList<User>();

User user = new User();

user.setFirstName("Venkata");

user.setLastName("reddy");

user.setUserName("vreddy");

user.setSalary(400);

userList.add(user);

user = new User();

user.setFirstName("Ram");

user.setLastName("Mohan");

user.setUserName("rmohan");

user.setSalary(500);

userList.add(user);

user = new User();

user.setFirstName("Amod");

user.setLastName("Mudholkar");

user.setUserName("aamod");

user.setSalary(600);

userList.add(user);

return "success";

}

public List<String> getCountries() {

return countries;

}

public void setCountries(List<String> countries) {

this.countries = countries;

}

public List<User> getUserList() {

return userList;

}

public void setUserList(List<User> userList) {

this.userList = userList;

}

class User{

private Integer salary;

private String firstName;

private String lastName;

private String userName;

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 String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

public Integer getSalary() {

return salary;

}

public void setSalary(Integer salary) {

this.salary = salary;

}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd">

<result>/result.jsp</result>

</action>

<result>/success.jsp</result>

<result name="input">/result.jsp</result>

</action>

<result>/dispatch_success.jsp</result>

</action>

<result>/dispatch_success.jsp</result>

</action>

<result>/dispatch_success.jsp</result>

</action>

<result>/dispatch_success.jsp</result>

</action>

<result>/iterator_tag.jsp</result>

</action>

</package>

</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

<display-name>Struts2Example2</display-name>

<filter-name>struts2</filter-name>

<filter-class>

org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

</web-app>

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Java Interview Answers

Tuesday 13 August 2013

Top Most Struts 2.x Tags Demo code

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