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java,sql,hibernate,spring mvc

SpringMVC3 Hibernate CRUD Sample Application

To learn any web framework starting with a HelloWorld application is a good idea. Once you have some familiarity with the framework configuration, it's better to do a CRUD(Create,Read,Update,Delete) application which covers various aspects of a web framework like Validation, Request URL Mappings, Request Parameter Binding, Pre-populating forms etc.

Now I am going to explain how to write a Simple CRUD application using SpringMVC3, Hibernate and MySQL.
Our Application is ContactsManagement where you can view or search contacts, create new contacts, edit or delete existing contacts.

Step#1: Create the CONTACTS Table

CREATE TABLE  CONTACTS(  id int(10) unsigned NOT NULL AUTO_INCREMENT,  name varchar(45) NOT NULL,  address varchar(45) DEFAULT NULL,  gender char(1) DEFAULT 'M',  dob datetime DEFAULT NULL,  email varchar(45) DEFAULT NULL,  mobile varchar(15) DEFAULT NULL,  phone varchar(15) DEFAULT NULL,  PRIMARY KEY (id));

Step#2: Copy the SpringMVC, Hibernate and their dependent jars into WEB-INF/lib folder.

If you are using Maven you can mention the following dependencies.


<dependencies>  <dependency>          <groupId>junit</groupId>          <artifactId>junit</artifactId>          <version>4.8.1</version>          <type>jar</type>          <scope>compile</scope>      </dependency>      <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-web</artifactId>        <version>3.0.5.RELEASE</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-core</artifactId>        <version>3.0.5.RELEASE</version>        <type>jar</type>        <scope>compile</scope>        <exclusions>            <exclusion>                <artifactId>commons-logging</artifactId>                <groupId>commons-logging</groupId>            </exclusion>        </exclusions>    </dependency>    <dependency>        <groupId>log4j</groupId>        <artifactId>log4j</artifactId>        <version>1.2.14</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-tx</artifactId>        <version>3.0.5.RELEASE</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>jstl</groupId>        <artifactId>jstl</artifactId>        <version>1.1.2</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>taglibs</groupId>        <artifactId>standard</artifactId>        <version>1.1.2</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-webmvc</artifactId>        <version>3.0.5.RELEASE</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-aop</artifactId>        <version>3.0.5.RELEASE</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>commons-digester</groupId>        <artifactId>commons-digester</artifactId>        <version>2.1</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>commons-collections</groupId>        <artifactId>commons-collections</artifactId>        <version>3.2.1</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.hibernate</groupId>        <artifactId>hibernate-core</artifactId>        <version>3.3.2.GA</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>javax.persistence</groupId>        <artifactId>persistence-api</artifactId>        <version>1.0</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>c3p0</groupId>        <artifactId>c3p0</artifactId>        <version>0.9.1.2</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-orm</artifactId>        <version>3.0.5.RELEASE</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.slf4j</groupId>        <artifactId>slf4j-api</artifactId>        <version>1.6.1</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.slf4j</groupId>        <artifactId>slf4j-log4j12</artifactId>        <version>1.6.1</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>cglib</groupId>        <artifactId>cglib-nodep</artifactId>        <version>2.2</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>org.hibernate</groupId>        <artifactId>hibernate-annotations</artifactId>        <version>3.4.0.GA</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>jboss</groupId>        <artifactId>javassist</artifactId>        <version>3.7.ga</version>        <type>jar</type>        <scope>compile</scope>    </dependency>    <dependency>        <groupId>mysql</groupId>        <artifactId>mysql-connector-java</artifactId>        <version>5.1.14</version>        <type>jar</type>        <scope>compile</scope>    </dependency>  </dependencies>



Step#3: Configure SpringMVC


a) Configure DispatcherServlet in web.xml


<servlet>        <servlet-name>dispatcher</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <load-on-startup>1</load-on-startup>    </servlet>        <servlet-mapping>        <servlet-name>dispatcher</servlet-name>        <url-pattern>*.do</url-pattern>    </servlet-mapping>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:applicationContext.xml</param-value>  </context-param>

b) Configure View Resolver in WEB-INF/dispatcher-servlet.xml

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"          p:prefix="/jsp/" p:suffix=".jsp">    </bean>


c) Configure Annotation support, PropertyPlaceHolderConfigurer, ResourceBundleMessageSource in WEB-INF/classes/applicationContext.xml


    <context:annotation-config></context:annotation-config>        <context:component-scan base-package="com.sivalabs"></context:component-scan>        <mvc:annotation-driven> </mvc:annotation-driven >        <context:property-placeholder location="classpath:config.properties"></context:property-placeholder>        <bean     id="messageSource"            class="org.springframework.context.support.ResourceBundleMessageSource"            p:basename="Messages">    </bean>

Step#4: Configure JDBC connection parameters and Hibernate properties in config.properties


################### JDBC Configuration ##########################jdbc.driverClassName=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost:3306/sivalabsjdbc.username=rootjdbc.password=admin################### Hibernate Configuration ##########################hibernate.dialect=org.hibernate.dialect.MySQLDialecthibernate.show_sql=true#hibernate.hbm2ddl.auto=updatehibernate.generate_statistics=true




Step#5: Configure DataSource, SessionFactory, TransactionManagement support in WEB-INF/classes/applicationContext.xml


 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"            p:driverClassName="${jdbc.driverClassName}"            p:url="${jdbc.url}"            p:username="${jdbc.username}"            p:password="${jdbc.password}">    </bean>                <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">        <property name="dataSource" ref="dataSource"></property>        <property name="hibernateProperties">          <props>                        <prop key="hibernate.dialect">${hibernate.dialect}</prop>                          <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>           </props>        </property>        <property name="packagesToScan" value="com.sivalabs"></property>    </bean>                <bean     id="transactionManager"            class="org.springframework.orm.hibernate3.HibernateTransactionManager"               p:sessionFactory-ref="sessionFactory">    </bean>        <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>        

Step#6: Configure the Labels, error messages in WEB-INF/classes/Messages.properties

App.Title=SivaLabstypeMismatch.java.util.Date={0} is Invalid Date.dob=DOB

Step#7: Create the Entity class Contact.java

package com.sivalabs.contacts;import java.util.Date;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;import org.apache.commons.lang.builder.ToStringBuilder;@Entity@Table(name="CONTACTS")public class Contact{    @Id    @GeneratedValue(strategy = GenerationType.AUTO)    private int id;    @Column    private String name;    @Column private String address;    @Column private String gender;    @Column private Date dob;    @Column private String email;    @Column private String mobile;    @Column private String phone;        @Override    public String toString()    {        return ToStringBuilder.reflectionToString(this);    }    //setters & getters    }

Step#8: Create the ContactsDAO.java which performs CRUD operations on CONTACTS table.

package com.sivalabs.contacts;import java.util.List;import org.hibernate.Criteria;import org.hibernate.SessionFactory;import org.hibernate.criterion.Restrictions;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Repository;import org.springframework.transaction.annotation.Transactional;@Repository@Transactionalpublic class ContactsDAO{    @Autowired    private SessionFactory sessionFactory;        public Contact getById(int id)    {        return (Contact) sessionFactory.getCurrentSession().get(Contact.class, id);    }        @SuppressWarnings("unchecked")    public List<Contact> searchContacts(String name)    {        Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Contact.class);        criteria.add(Restrictions.ilike("name", name+"%"));        return criteria.list();    }        @SuppressWarnings("unchecked")    public List<Contact> getAllContacts()    {        Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Contact.class);        return criteria.list();    }        public int save(Contact contact)    {        return (Integer) sessionFactory.getCurrentSession().save(contact);    }        public void update(Contact contact)    {        sessionFactory.getCurrentSession().merge(contact);    }        public void delete(int id)    {        Contact c = getById(id);        sessionFactory.getCurrentSession().delete(c);    }}


Step#9: Create ContactFormValidator.java which performs the validations on saving/updating a contact.

package com.sivalabs.contacts;import org.springframework.stereotype.Component;import org.springframework.validation.Errors;import org.springframework.validation.ValidationUtils;import org.springframework.validation.Validator;@Component("contactFormValidator")public class ContactFormValidator implements Validator{    @SuppressWarnings("unchecked")    @Override    public boolean supports(Class clazz)    {        return Contact.class.isAssignableFrom(clazz);    }    @Override    public void validate(Object model, Errors errors)    {        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "name","required.name", "Name is required.");    }}

Step#10: Create ContactsControllers.java which processes all the CRUD requests.


package com.sivalabs.contacts;import java.text.SimpleDateFormat;import java.util.Date;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.propertyeditors.CustomDateEditor;import org.springframework.stereotype.Controller;import org.springframework.validation.BindingResult;import org.springframework.web.bind.WebDataBinder;import org.springframework.web.bind.annotation.InitBinder;import org.springframework.web.bind.annotation.ModelAttribute;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.support.SessionStatus;import org.springframework.web.servlet.ModelAndView;@Controllerpublic class ContactsControllers{    @Autowired    private ContactsDAO contactsDAO;        @Autowired    private ContactFormValidator validator;            @InitBinder    public void initBinder(WebDataBinder binder)    {        SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");        dateFormat.setLenient(false);        binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));    }            @RequestMapping("/searchContacts")    public ModelAndView searchContacts(@RequestParam(required= false, defaultValue="") String name)    {        ModelAndView mav = new ModelAndView("showContacts");        List<Contact> contacts = contactsDAO.searchContacts(name.trim());        mav.addObject("SEARCH_CONTACTS_RESULTS_KEY", contacts);        return mav;    }        @RequestMapping("/viewAllContacts")    public ModelAndView getAllContacts()    {        ModelAndView mav = new ModelAndView("showContacts");        List<Contact> contacts = contactsDAO.getAllContacts();        mav.addObject("SEARCH_CONTACTS_RESULTS_KEY", contacts);        return mav;    }        @RequestMapping(value="/saveContact", method=RequestMethod.GET)    public ModelAndView newuserForm()    {        ModelAndView mav = new ModelAndView("newContact");        Contact contact = new Contact();        mav.getModelMap().put("newContact", contact);        return mav;    }        @RequestMapping(value="/saveContact", method=RequestMethod.POST)    public String create(@ModelAttribute("newContact")Contact contact, BindingResult result, SessionStatus status)    {        validator.validate(contact, result);        if (result.hasErrors())        {                            return "newContact";        }        contactsDAO.save(contact);        status.setComplete();        return "redirect:viewAllContacts.do";    }        @RequestMapping(value="/updateContact", method=RequestMethod.GET)    public ModelAndView edit(@RequestParam("id")Integer id)    {        ModelAndView mav = new ModelAndView("editContact");        Contact contact = contactsDAO.getById(id);        mav.addObject("editContact", contact);        return mav;    }        @RequestMapping(value="/updateContact", method=RequestMethod.POST)    public String update(@ModelAttribute("editContact") Contact contact, BindingResult result, SessionStatus status)    {        validator.validate(contact, result);        if (result.hasErrors()) {            return "editContact";        }        contactsDAO.update(contact);        status.setComplete();        return "redirect:viewAllContacts.do";    }            @RequestMapping("deleteContact")    public ModelAndView delete(@RequestParam("id")Integer id)    {        ModelAndView mav = new ModelAndView("redirect:viewAllContacts.do");        contactsDAO.delete(id);        return mav;    }    }


Step#11: Instead of writing the JSTL tag library declerations in all the JSPs, declare them in one JSP and include that JSP in other JSPs.

 


taglib_includes.jsp

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%><%@taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%><%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%><%@taglib uri="http://www.springframework.org/tags" prefix="spring"%>


Step#12: Create the JSPs.


a)showContacts.jsp


<%@include file="taglib_includes.jsp" %><html><head><title><spring:message code="App.Title"></spring:message> </title><script type="text/javascript" src="js/contacts.js"></script></head><body style="font-family: Arial; font-size:smaller;">    <center>    <form action="searchContacts.do" method="post">                    <table style="border-collapse: collapse;" border="0" bordercolor="#006699" width="500">            <tr>                <td>Enter Contact Name</td>                <td><input type="text" name="name"/>                      <input type="submit" value="Search"/>                      <input type="button" value="New Contact" onclick="javascript:go('saveContact.do');"/>            </td></tr>        </table>    </form>        <table style="border-collapse: collapse;" border="1" bordercolor="#006699" width="500">        <tr bgcolor="lightblue">            <th>Id</th>            <th>Name</th>                        <th>Address</th>                <th>Mobile</th>            <th></th>        </tr>        <c:if test="${empty SEARCH_CONTACTS_RESULTS_KEY}">        <tr>            <td colspan="4">No Results found</td>        </tr>        </c:if>        <c:if test="${! empty SEARCH_CONTACTS_RESULTS_KEY}">            <c:forEach var="contact" items="${SEARCH_CONTACTS_RESULTS_KEY}">                    <tr>                <td><c:out value="${contact.id}"></c:out></td>                <td><c:out value="${contact.name}"></c:out></td>                <td><c:out value="${contact.address}"></c:out> </td>                <td><c:out value="${contact.mobile}"></c:out></td>                <td>                     <a href="updateContact.do?id=${contact.id}">Edit</a>                      <a href="javascript:deleteContact('deleteContact.do?id=${contact.id}');">Delete</a>                </td>            </tr>            </c:forEach>        </c:if>                    </table>        </center>        </body></html>


b)newContact.jsp


<%@include file="taglib_includes.jsp" %><html><head>    <script type="text/javascript" src="js/contacts.js"></script>    <title><spring:message code="App.Title"></spring:message> </title></head><body style="font-family: Arial; font-size:smaller;"><table  bgcolor="lightblue" width="750" height="500" align="center" style="border-collapse: collapse;" border="1" bordercolor="#006699" >    <tr>        <td align="center"><h3>Edit Contact Form</h3></td>    </tr>    <tr valign="top" align="center">    <td align="center">         <form:form action="saveContact.do" method="post" commandName="newContact">                            <table width="500" style="border-collapse: collapse;" border="0" bordercolor="#006699" cellspacing="2" cellpadding="2">                        <tr>                        <td width="100" align="right">Name</td>                        <td width="150">                        <form:input path="name"/></td>                        <td align="left">                        <form:errors path="name" cssStyle="color:red"></form:errors>                        </td>                    </tr>                                        <tr>                        <td width="100" align="right">DOB</td>                        <td><form:input path="dob"/></td>                        <td align="left"><form:errors path="dob" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td width="100" align="right">Gender</td>                        <td>                                                    <form:select path="gender">                                <form:option value="M" label="Male"/>                                <form:option value="F" label="Female"/>                            </form:select>                                                </td>                        <td>                        </td>                                            </tr>                    <tr>                        <td width="100" align="right">Address</td>                        <td><form:input path="address"/></td>                        <td align="left">                        <form:errors path="address" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td width="100" align="right">Email</td>                        <td><form:input path="email"/></td>                        <td align="left"><form:errors path="email" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td width="100" align="right">Mobile</td>                        <td><form:input path="mobile"/></td>                        <td align="left">                        <form:errors path="mobile" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td colspan="3" align="center">                        <input type="submit" name="" value="Save">                                                  <input type="reset" name="" value="Reset">                                                  <input type="button"  value="Back" onclick="javascript:go('viewAllContacts.do');">                        </td>                    </tr>                                    </table>                    </form:form>    </td>      </tr></table></body></html>


c)editContact.jsp


<%@include file="taglib_includes.jsp" %><html><head>    <script type="text/javascript" src="js/contacts.js"></script>    <title><spring:message code="App.Title"></spring:message> </title></head><body style="font-family: Arial; font-size:smaller;"><table  bgcolor="lightblue" width="750" height="500" align="center" style="border-collapse: collapse;" border="1" bordercolor="#006699" >    <tr>        <td align="center"><h3>Edit Contact Form</h3></td>    </tr>  <tr valign="top" align="center">    <td align="center">         <form:form action="updateContact.do" method="post" commandName="editContact">                <table width="500" style="border-collapse: collapse;" border="0" bordercolor="#006699" cellspacing="2" cellpadding="2">                                        <tr>                        <td width="100" align="right">Id</td>                        <td width="150">                        <form:input path="id" readonly="true"/></td>                        <td align="left">                        <form:errors path="id" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td width="100" align="right">Name</td>                        <td>                        <form:input path="name"/></td>                        <td align="left">                        <form:errors path="name" cssStyle="color:red"></form:errors>                        </td>                    </tr>                                        <tr>                        <td width="100" align="right">DOB</td>                        <td><form:input path="dob"/></td>                        <td align="left"><form:errors path="dob" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td width="100" align="right">Gender</td>                        <td>                                                    <form:select path="gender">                                <form:option value="M" label="Male"/>                                <form:option value="F" label="Female"/>                            </form:select>                                                </td>                        <td>                        </td>                                            </tr>                    <tr>                        <td width="100" align="right">Address</td>                        <td><form:input path="address"/></td>                        <td align="left">                        <form:errors path="address" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td width="100" align="right">Email</td>                        <td><form:input path="email"/></td>                        <td align="left"><form:errors path="email" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr>                        <td width="100" align="right">Mobile</td>                        <td><form:input path="mobile"/></td>                        <td align="left">                        <form:errors path="mobile" cssStyle="color:red"></form:errors>  </td>                    </tr>                    <tr valign="bottom">                        <td colspan="3" align="center">                        <input type="button"  value="Delete" onclick="javascript:deleteContact('deleteContact.do?id=${editContact.id}');">                                                  <input type="submit" name="" value="Save">                                                                          <input type="button"  value="Back" onclick="javascript:go('viewAllContacts.do');">                        </td>                    </tr>                                    </table>                        </form:form>    </td>      </tr></table></body></html>


Step#13: Write the javascript file js/contacts.js containing the utility methods


function go(url){    window.location = url;}function deleteContact(url){    var isOK = confirm("Are you sure to delete?");    if(isOK)    {        go(url);    }}


Step#14: The welcome file index.jsp

<%response.sendRedirect("viewAllContacts.do");%>

Step#15: Start the server and point your browser URL to http://localhost:8080/SpringMVCHibernate

 

 

From: http://sivalabs.blogspot.com/2011/04/springmvc3-hibernate-crud-sample.html

 

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