In this post we will see how to create a login page using spring 3 and Hibernate 3. Below is
the screen shot of the directory structure.
As shown in the below screens create "LoginTab" table. For this example I am using Oracle as data base.
After creating the table, enter username, password and access_mode of your choice.
Next step is to create a bean for the table "LoginTab". Create a class with as shown below.
We need to mark the class as "@Entity" to state the class as entity.
File: com.ram.form.LoginTab
package com.ram.form;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class LoginTab {
@Id
private String uname;
private String password;
private String access_mode;
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getAccess_mode() {
return access_mode;
}
public void setAccess_mode(String access_mode) {
this.access_mode = access_mode;
}
}
Create a web.xml file as shown below. Note that the welcome-file is given as "callLogin.html".
This is name is checked in the controller and the "LoginPage.jsp" will be displayed.
File: WEB-INF/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>Spring Login Page Example</display-name>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>callLogin.html</welcome-file>
</welcome-file-list>
</web-app>
File: com.ram.controller.LoginController.java
package com.ram.controller;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.ram.dao.LoginDaoImpl;
import com.ram.form.LoginTab;
@Controller
public class LoginController {
@Autowired
private LoginDaoImpl loginDaoImpl;
@RequestMapping(value="/callLogin", method = RequestMethod.GET)
public String callLogin(Map model){
LoginTab LoginPage = new LoginTab();
model.put("LoginPage", LoginPage);
return "LoginPage";
}
@RequestMapping("/login")
public String loginValidate(@ModelAttribute("loginTab") LoginTab loginTab, BindingResult result){
boolean flag = false;
List<LoginTab> users = loginDaoImpl.validateUser(loginTab);
for(Iterator<LoginTab> it = users.iterator(); it.hasNext();){
LoginTab login = it.next();
if(login.getUname().equals(loginTab.getUname())){
if(login.getPassword().equals(loginTab.getPassword())){
flag = true;
}
}
}
if(flag==true){
return "Success";
}else{
return "Error";
}
}
}
Lets create a dao class. In this class using the SessionFactory we will establish the connection, use
the HQL to get the LoginTab table details.
File: com.ram.dao.LoginDaoImpl.java
package com.ram.dao;
import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.ram.form.LoginTab;
@Repository
public class LoginDaoImpl {
@Autowired
private SessionFactory sessionFactory;
public List<LoginTab> validateUser(LoginTab loginTab){
String hql = "from LoginTab where uname = '"+loginTab.getUname()+"'";
return getSessionFactory().openSession().createQuery(hql).list();
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
}
File: WEB-INF/dispatcher-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
<context:annotation-config/>
<context:component-scan base-package="com.ram"></context:component-scan>
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
<property name="url" value="jdbc:oracle:thin:@localhost:1521:xe"/>
<property name="username" value="hr"/>
<property name="password" value="hr"/>
<property name="initialSize" value="2"/>
<property name="maxActive" value="5"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan" value="com.ram.form"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
</beans>
File: WEB-INF/jsp/LoginPage.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Spring Login Page</title>
</head>
<body>
<center>
<h3>Login Page</h3>
<form:form action="login.html" commandName="LoginPage">
<table>
<tr>
<td>User Name: <FONT color="red"><form:errors
path="uname" /></FONT></td>
<td><form:input path="uname" /></td>
</tr>
<tr>
<td>Password: <FONT color="red"><form:errors
path="password" /></FONT></td>
<td><form:password path="password" /></td>
</tr>
</table>
<p>
<input type="submit" value="Submit" />
</p>
</form:form>
</center>
</body>
</html>
File: WEB-INF/jsp/Success.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Spring Success Page</title>
</head>
<body>
<center>
<h4>Welcome to the application.</h4>
<p>
<a href="callLogin.html">Back</a>
</p>
</center>
</body>
</html>
File: WEB-INF/jsp/Error.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Spring Error Page</title>
</head>
<body>
<center>
<h4 style="color: red">Error page, please go back to login page
and enter correct credentials</h4>
<p>
<a href="callLogin.html">Back</a>
</p>
</center>
</body>
</html>
Right click on the "Spring_Hibernate_Login" directory structure and select "Run As -> Run on Server".
Once the login page appears, enter the credentials to successfully login. If incorrect credentials are
given, then error page will be thrown.
