Create Dynamic Pagination using Java Spring Boot, Hibernate and MySQL

Prerequisite

• Eclipse IDE or Spring Tool Suite (STS)
• Mysql installed

We will make a Small application for demonstrating dynamic pagination by dividing large number of data into mutlitple pages with some random data in MySQL using Eclipse IDE with STS plugin installed. Let's Start

1. Create a Spring Boot project
   1. Click File -> New Project -> Spring Starter Project
   
   
   
   
   2. After filling the given details click Next
   
   
   
   
   
   3. Add JPA, MySQL and Web as dependencies and click Finish
   
   
   4. Wait until complete Project is imported successfully



2. Add Packages, Classes, Jsp pages and xml files in your project as shown in the image below:
   
   
   




3. HomeController.java

   
   
   package com.tutorial.controller; import java.util.LinkedHashSet; import java.util.Set; import javax.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Sort; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import com.tutorial.model.User; import com.tutorial.repository.UserRepository; @Controller public class HomeController { private static final int PAGE_SIZE = 3; // Number of rows to contain per page private long totalUsersCount; // number of rows in Database @Autowired UserRepository userRepo; private PageRequest gotoPage(int page) { PageRequest request = new PageRequest(page, PAGE_SIZE, Sort.Direction.DESC, "id"); return request; } @RequestMapping(value = "/", method = RequestMethod.GET) public String index(HttpSession session, Model model, @RequestParam(value = "pageNo", required = false, defaultValue = "0") String pageNo) { int lastPageNo; int gotoPageNo = Integer.parseInt(pageNo); Set < User > allUsers = new LinkedHashSet < User > (); //session.setAttribute("currentPageNo", 0); for (User u: userRepo.findAll(gotoPage(gotoPageNo))) // fetches rows from Database as per Page No { allUsers.add(u); } totalUsersCount = userRepo.count(); //total no of users if (totalUsersCount % PAGE_SIZE != 0) lastPageNo = (int)(totalUsersCount / PAGE_SIZE) + 1; // get last page No (zero based) else lastPageNo = (int)(totalUsersCount / PAGE_SIZE); model.addAttribute("lastPageNo", lastPageNo); model.addAttribute("users", allUsers); return "index"; } }




4. User.java

   
   
   package com.tutorial.model; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity public class User { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "id") private Integer id; @Column(name = "FirstName") private String firstName; @Column(name = "LastName") private String lastName; @Column(name = "country") private String country; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } 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 getCountry() { return country; } public void setCountry(String country) { this.country = country; } }




5. UserRepository.java

   
   
   package com.tutorial.repository; import org.springframework.data.domain.Pageable; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; import com.tutorial.model.User; @Repository public interface UserRepository extends CrudRepository < User, Long > { public Iterable < User > findAll(Pageable page); }




6. PaginationTutorialApplication.java

   
   
   package com.tutorial; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.ComponentScan; @SpringBootApplication public class PaginationTutorialApplication { public static void main(String[] args) { SpringApplication.run(PaginationTutorialApplication.class, args); } }




7. ServletInitializer.java

   
   
   package com.tutorial; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.web.servlet.support.SpringBootServletInitializer; import org.springframework.context.annotation.Bean; import org.springframework.web.servlet.ViewResolver; import org.springframework.web.servlet.view.InternalResourceViewResolver; public class ServletInitializer extends SpringBootServletInitializer { @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.sources(PaginationTutorialApplication.class); } }

8. application.properties

   
   
   spring.jpa.hibernate.ddl-auto=update spring.datasource.url=jdbc:mysql://localhost:3306/tutorial spring.datasource.username=root spring.datasource.password= spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect spring.mvc.view.prefix= /WEB-INF/jsp/ spring.mvc.view.suffix= .jsp spring.jpa.show-sql = true



9. index.jsp

   
   
   <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Pagination Tutorial</title> </head> <body> <table > <tr > <th>ID</th> <th>First Name</th> <th>Last Name</th> <th>Country</th> </tr> <c:forEach items="${users}" var="user"> <tr > <td>${user.id }</td> <td>${user.firstName }</td> <td>${user.lastName }</td> <td>${user.country }</td> </tr> </c:forEach> </table> <br> <br> <c:forEach var="i" begin="0" end="${lastPageNo-1 }" > <a href="/?pageNo=${i }">${i+1 }</a> <!-- Displaying Page No --> </c:forEach> </body> </html>




10. mvc-dispatcher-servlet.xml

    
    
    <?xml version="1.0" encoding="UTF-8"?> <beans :xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:jpa="http://www.springframework.org/schema/data/jpa" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd" > <context:component-scan base-package="com.tutorial.controller"></context:component-scan> <jpa:repositories base-package="com.tutorial.repository" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> <mvc:annotation-driven/> </beans>




11. pom.xml

    
    
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} }); $('#addCommentAjax').click(function(event){ var name=$('#name').val(); var comment=$('textarea').val(); var email=$('#email').val(); var intials =name.charAt(0); var profileImage = $('#profileImage').text(intials); event.preventDefault(); if(name!="" && comment!="" && email!="" && validateEmail(email) && addCommentClicked==="0"){ $.ajax({ type:'POST', url:'/ajax/posts/7/addComment', data:{name:name,email:email,comment:comment,'g-recaptcha-response':grecaptcha.getResponse()}, dataType: 'json', beforeSend:function(){ $('#loadingIcon').html('<span style="font-size:30px; text-align:center;"><i class="fa fa-spinner fa-spin"></i> &nbsp;Commenting</span>'); }, success: function(comments){ $('#loadingIcon').html(""); var newHtml="<ul class='list-group'><li class='list-group-item '><span class='title' style='margin-left:0px;'>"+comments.created_by+" <time>"+comments.created_at+"</time> <p>"+comments.description +"</p></span></li></ul>"; $('#latestComment').html(newHtml); $("#addCommentAjax").attr("disabled", true); } }); addCommentClicked="1"; document.getElementById("#addCommentAjax").disabled = true; } else if(name=="" || comment==""){ alert("Name or Comment can't be blank") } else { alert("Please Enter Valid Email Address"); } }); function validateEmail(email) { var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/; return re.test(email); } function setCookie(name,value,days) { var expires = ""; if (days) { var date = new Date(); date.setTime(date.getTime() + (days*24*60*60*1000)); expires = "; expires=" + date.toUTCString(); } document.cookie = name + "=" + (value || "") + expires + "; path=/"; } function getCookie(name) { var nameEQ = name + "="; var ca = document.cookie.split(';'); for(var i=0;i < ca.length;i++) { var c = ca[i]; while (c.charAt(0)==' ') c = c.substring(1,c.length); if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length); } return null; } }); </script> <!-- <div class="modal fade" id="donateModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> <div class="modal-dialog modal-lg"> <div class="modal-content"> <div class="modal-header"> <h4 class="modal-title" id="myModalLabel">Improve Your Search with AI:</h4> <button type="button" class="close" data-dismiss="modal" aria-label="Close" id="donateClosemodal"><span aria-hidden="true">&times;</span></button> </div> <div class="modal-body" id="getCode" > Let's deep drive your search by using below <b>AI Search Tool</b> and get more accurate information:<br> <h4 style="text-align: center;"><script async src="https://cse.google.com/cse.js?cx=0349454d8f798210d"></script> <div class="gcse-search"></div></h4> </div> </div> </div> </div> <script> window.addEventListener("scroll", openModal); 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