Struts example
Below post shows how to build simple application with struts.
open eclipse -> project -> create dynamic Webproject->
provide name as - struts_sample [As you like]
select Dynamic web module version as 2.5
Then click on Finish button.
-> open the web.xml , which available inside WEB-INF folder
copy the below code and paste in side web.xml .
action
org.apache.struts.action.ActionServlet
config /WEB-INF/struts-config.xml
1
action
*.do
-> Create xml and name it as struts-config.xml inside WEB-INF.
->open the struts-config.xml and paste the below code inside the struts-config.xml
-> Now it's time to start our work like creating jsp files, form classes, action classes and need to add required jars.
-> first we will write jsp page. Here i am writting 4 jsp pages
1. login.jsp
2. welcome.jsp
3. adduser.jsp
4. success.jsp
-> create one folder inside WebContent with name jsp [WebContent/jsp/login.jsp] -- this is for login details which will have user name and password along with validation.
paste the below code inside login.jsp
<%@taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%><%@taglib
uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
Login page
-> create welcome.jsp [WebContent/jsp/welcome.jsp] -- this is for after successful login details .
paste the below code inside welcome.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
Welcome page
<% String message = (String)request.getAttribute("message"); %>
Welcome User :
<%= message %>
You have successfully logged in.
-> create adduser.jsp [WebContent/jsp/adduser.jsp] -- this contains user details along with required validation.
paste the below code inside adduser.jsp
<%@taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%><%@taglib
uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
Add User
-> create success.jsp [WebContent/jsp/success.jsp] -- this page will display after successful user details.
paste the below code inside success.jsp
<%@taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%><%@taglib
uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
Login page
success
successfully Added.
-> We need to create java classes.
-> create a package -> com.siva.form
-> com.siva.action
->create LoginForm.java inside com.siva.form package and paste the below code.
package com.siva.form;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
/**
*
* @author sivaraju
*
*/
public class LoginForm extends ActionForm {
/**
*
*/
private static final long serialVersionUID = -1743531020254647308L;
private String userName;
private String password;
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
ActionErrors actionErrors = new ActionErrors();
if (userName == null || userName.trim().equals("")) {
actionErrors.add("userName", new ActionMessage("error.username"));
}
try {
if (password == null || password.trim().equals("")) {
actionErrors.add("password",
new ActionMessage("error.password"));
}
} catch (Exception e) {
e.printStackTrace();
}
return actionErrors;
}
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;
}
}
->create UserForm.java inside com.siva.form and paste below code
package com.siva.form;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
/**
*
* @author sivaraju
*
*/
public class UserForm extends ActionForm {
/**
*
*/
private static final long serialVersionUID = -2087861874662967982L;
private String userName;
private String sex;
private int age;
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
ActionErrors actionErrors = new ActionErrors();
try {
if (userName == null || userName.trim().equals("")) {
actionErrors.add("userName", new ActionMessage("error.username"));
}
if (sex == null || sex.trim().equals("")) {
actionErrors.add("sex",new ActionMessage("error.sex"));
}
if (age <=0 ) {
actionErrors.add("age",new ActionMessage("error.age"));
}
} catch (Exception e) {
e.printStackTrace();
}
return actionErrors;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
-> create LoginAction.java inside com.siva.action pakage and paste the below code
package com.siva.action;
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.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.siva.form.LoginForm;
public class LoginAction extends Action {
private static final String FAILURE = "failure";
private static final String SUCCESS = "success";
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
String target = null;
LoginForm loginForm = (LoginForm) form;
if (loginForm.getUserName().equals("admin")
&& loginForm.getPassword().equals("admin123")) {
target = SUCCESS;
request.setAttribute("message", loginForm.getUserName());
} else {
target = FAILURE;
}
return mapping.findForward(target);
}
}
-> create AddUserAction.java inside com.siva.action package and paste below code.
package com.siva.action;
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.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.siva.form.UserForm;
/**
*
* @author sivaraju
*
*/
public class AddUserAction extends Action {
private static final String SUCCESS = "success";
/**
*
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
UserForm userForm = (UserForm) form;
System.out.println("username["+userForm.getUserName()+"]");
System.out.println("Age["+userForm.getAge()+"]");
System.out.println("Sex["+userForm.getSex()+"]");
//If this details need to store in db. Then need to get the db details from data source object. Store as per requirement.
return mapping.findForward(SUCCESS);
}
}
->create MessageResource.properties file inside src/resource [src/resource/MessageResource.properties] and paste the below code
label.username = User Name
label.password = Password
label.welcome = Welcome
error.username =Username is required.
error.password = Password is required.
label.age = Age
label.sex = Sex
label.adduser = Add User
error.age = Age is required field
error.sex=Sex is required field
-> Add the below jars inside lib folder.(Among below jar's few of the jar's may not be required]
bcprov-jdk14-121.jar
commons-digester-2.1.jar
commons-fileupload-1.1.1.jar
commons-io-1.2.jar
commons-lang-2.4.jar
org-apache-commons-logging.jar
org.apache.commons.beanutils.jar
servlet-api.jar
struts.jar
-> Right click on the project-> Run As-> Run On Server-> [select the server which ever server you want to run the application]. Tomcat is prefered.
-> http://localhost:8080/struts_sample/login.jsp [ after submitting it will redirect to welcome.jsp]- username - admin / password - admin123
-> http://localhost:8080/struts_sample/jsp/adduser.jsp [after submitting it will redirec tto success.jsp].
In this way stuts application will work.
