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Examples
How to save simple entity in Spring+JPA+Hibernate using Entity Manager JPA entity annotations @Id, @Basic, @Transient, @Lob and @Temporal in Spring+JPA+Hibernate Framework How to read Entity get object by id in Spring+JPA+Hibernate using Entity Manager Primary key in entity with @Id @GeneratedValue in Spring+JPA+Hibernate framework using EntityManager How to embed a object in entity with @Embedded @Embeddable annotations in Spring Hibernate Framework How to use @Embedded object with @AttributeOverride in Spring Hibernate Framework How to use multiple primary key entity using Spring Hibernate Framework
Examples [cont'd]
How to map using @ElementCollection JPA annotation with Embeddable using Spring and Hibernate framework? @ElementCollection with @JoinTable, @GenericGenerator and @CollectionId using JPA Spring and Hibernate JPA @ElementCollection annotation with fetchtype eager and lazy in Spring Hibernate Framework How to do One to One mapping in JPA annotations with Spring Hibernate Framework How to do One to Many mapping in JPA annotations using Spring Hibernate Framework How to do Many to Many mapping in JPA annotations using Spring Hibernate Framework How to enable One to Many with CascadeType PERSIST using Spring Hibernate Framework
Examples [cont'd]
How to use JPA Entity with Inheritance using Spring Hibernate Framework How to use JPA Entity with inheritance single table strategy in Spring Hibernate Framework How to use JPA @Inheritance with InheritanceType.TABLE_PER_CLASS strategy in Spring Hibernate Framework How to use JPA @Inheritance with InheritanceType.JOINED strategy in Spring Hibernate Framework How to do CRUD actions using LocalContainerEntityManagerFactoryBean with JPA Spring Hibernate Framework How to use Hibernate Query Language(HQL) with Hibernate Spring Framework How to do Pagination and Fetching selected columns in Hibernate Queries with Spring Hibernate Framework
Examples [cont'd]
How to bind where clause parameters in Query Object in JPA Spring Hibernate How to use NamedNativeQuery and NamedQuery of JPA with Spring and Hibernate Framework How to use CriteriaQuery and CriteriaBuilder of EntityManager in JPA Spring Hibernate Framework What is Query Cache (First level cache) in JPA Spring Hibernate Frameworks How to configure Second Level Cache (EhCacheRegionFactory) with JPA Spring Hibernate FrameWork
How to use CriteriaQuery and CriteriaBuilder of EntityManager in JPA Spring Hibernate Framework
16228 Views
Hints 
CriteriaQuery and CriteriaBuilder of EntityManager using with JPA.
Output: Browser 
Tomcat Console Log 
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: insert into STUDENT_INFO (STUDENT_NAME) values (?)
Hibernate: select studentinf0_.STUDENT_ID as STUDENT1_0_, studentinf0_.STUDENT_NAME as STUDENT2_0_ from STUDENT_INFO studentinf0_ where studentinf0_.STUDENT_NAME=? limit ?
{"studentId":7,"StudentName":"Student 7"}
Project Explorer Peview 
StudentInfo.java
package com.knowledgewalls.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity(name="STUDENT_INFO")
public class StudentInfo {
    @Id @GeneratedValue(strategy=GenerationType.AUTO)
    @Column(name="STUDENT_ID")
    private int studentId;
    
    @Column(name="STUDENT_NAME")
    private String StudentName;
    
    public StudentInfo(){}
    
    public StudentInfo(int studentId,String StudentName){
        this.studentId = studentId;
        this.StudentName = StudentName;
    }
    
    public int getStudentId() {
        return studentId;
    }
    public void setStudentId(int studentId) {
        this.studentId = studentId;
    }

    public String getStudentName() {
        return StudentName;
    }
    public void setStudentName(String studentName) {
        StudentName = studentName;
    }
}
StudentInfoDAO.java
package com.knowledgewalls.dao;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;

import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.knowledgewalls.entity.StudentInfo;

@Repository
@Transactional
public class StudentInfoDAO {
    
    @PersistenceContext
    EntityManager em;
    
    public void save10Students(){
        try {
            for (int i=1;i<=10;i++){
                StudentInfo studentInfo = new StudentInfo();
                    studentInfo.setStudentName("Student "+i);
                        
                em.persist(studentInfo);
            }
        }
        catch(Exception e){
            System.out.println("Insertion Failure.");
            e.printStackTrace();
        }
    }
    
    public StudentInfo getStudentByName(String studentName){
        try {
            CriteriaBuilder builder = em.getCriteriaBuilder();
            CriteriaQuery<StudentInfo> criteria = builder.createQuery(StudentInfo.class);
            Root<StudentInfo> studentInfo = criteria.from(StudentInfo.class);
                criteria.where(builder.equal(studentInfo.get("StudentName"), studentName));
            
            return (StudentInfo) em.createQuery(criteria.select(studentInfo)).getSingleResult();
        }
        catch (Exception e){
            e.printStackTrace();
            return null;
        }
    }
}

package com.knowledgewalls.dao;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;

import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.knowledgewalls.entity.StudentInfo;

@Repository
@Transactional
public class StudentInfoDAO {
    
    @PersistenceContext
    EntityManager em;
    
    public void save10Students(){
        try {
            for (int i=1;i<=10;i++){
                StudentInfo studentInfo = new StudentInfo();
                    studentInfo.setStudentName("Student "+i);
                        
                em.persist(studentInfo);
            }
        }
        catch(Exception e){
            System.out.println("Insertion Failure.");
            e.printStackTrace();
        }
    }
    
    public StudentInfo getStudentByName(String studentName){
        try {
            CriteriaBuilder builder = em.getCriteriaBuilder();
            CriteriaQuery<StudentInfo> criteria = builder.createQuery(StudentInfo.class);
            Root<StudentInfo> studentInfo = criteria.from(StudentInfo.class);
                criteria.where(builder.equal(studentInfo.get("StudentName"), studentName));
            
            return (StudentInfo) em.createQuery(criteria.select(studentInfo)).getSingleResult();
        }
        catch (Exception e){
            e.printStackTrace();
            return null;
        }
    }
}
package com.knowledgewalls.dao;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;

import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.knowledgewalls.entity.StudentInfo;

@Repository
@Transactional
public class StudentInfoDAO {
   
    @PersistenceContext
    EntityManager em;
   
    public void save10Students(){
        try {
            for (int i=1;i<=10;i++){
                StudentInfo studentInfo = new StudentInfo();
                    studentInfo.setStudentName("Student "+i);
                       
                em.persist(studentInfo);
            }
        }
        catch(Exception e){
            System.out.println("Insertion Failure.");
            e.printStackTrace();
        }
    }
   
    public StudentInfo getStudentByName(String studentName){
        try {
            CriteriaBuilder builder = em.getCriteriaBuilder();
            CriteriaQuery<StudentInfo> criteria = builder.createQuery(StudentInfo.class);
            Root<StudentInfo> studentInfo = criteria.from(StudentInfo.class);
                criteria.where(builder.equal(studentInfo.get("StudentName"), studentName));
           
            return (StudentInfo) em.createQuery(criteria.select(studentInfo)).getSingleResult();
        }
        catch (Exception e){
            e.printStackTrace();
            return null;
        }
    }
}
StudentInfoController.java
package com.knowledgewalls.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.google.gson.Gson;
import com.knowledgewalls.dao.StudentInfoDAO;

@Controller
public class StudentInfoController {
    
    @Autowired
    StudentInfoDAO studentInfoDAO;
    
    private void displayObject(Object object) {
        if (object == null)
            System.out.println("Null");
        else
            System.out.println(new Gson().toJson(object));
    }
    
    @RequestMapping(value="/doRun",method=RequestMethod.GET)
    public @ResponseBody String addUsers(){
        {
            studentInfoDAO.save10Students();
            displayObject(studentInfoDAO.getStudentByName("Student 7"));
        }
        
        return "Saved and Retrieved by HQL";
        
    }
}
Persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" >

  <persistence-unit name="hibernatePersistenceUnit">
          <properties>
            <property name="hibernate.hbm2ddl.auto" value="create" />
        </properties>
  </persistence-unit>

</persistence>
Beans-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:mvc="http://www.springframework.org/schema/mvc"
    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-3.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">

    <context:component-scan base-package="com.knowledgewalls" />
    <mvc:annotation-driven />
    <tx:annotation-driven transaction-manager="transactionManager" />
    
    <bean id="emf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="persistenceXmlLocation" value="classpath*:persistence.xml" />
        <property name="persistenceUnitName" value="hibernatePersistenceUnit" />
        <property name="dataSource" ref="dataSource"/>
        <property name="jpaVendorAdapter" ref="jpaVendorAdapter"/>
    </bean>
    
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/test" />
        <property name="username" value="root" />
        <property name="password" value="mysql" />
        <property name="initialSize" value="5" />
        <property name="maxActive" value="10" />
    </bean>
    
    <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
        <property name="database" value="MYSQL"></property>
        <property name="showSql" value="true"></property>
        <property name="generateDdl" value="false"></property>
        <property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect"></property>
    </bean>
    
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
         <property name="entityManagerFactory" ref="emf" />
    </bean>
    
    <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />
    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
    <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>

</beans>
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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Hibernate024_CriteriaQueries</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
 
  <servlet>
    <servlet-name>beans</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>beans</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>
Output: SQL
drop table if exists STUDENT_INFO;
create table STUDENT_INFO (STUDENT_ID integer not null auto_increment, STUDENT_NAME varchar(255), primary key (STUDENT_ID)) ENGINE=InnoDB;
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