Source code for Intro to QueryDSL article.

querydsl/src/test/java/org/baeldung/dao/PersonDaoTest.java

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+package org.baeldung.dao;
+
+import junit.framework.Assert;
+import org.baeldung.entity.Person;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.transaction.TransactionConfiguration;
+import org.springframework.transaction.annotation.Transactional;
+
+
+@ContextConfiguration("/test-context.xml")
+@RunWith(SpringJUnit4ClassRunner.class)
+@Transactional
+@TransactionConfiguration(defaultRollback=true)
+public class PersonDaoTest {
+
+    @Autowired
+    private PersonDao personDao;
+
+    @Test
+    public void testCreation() {
+        personDao.save(new Person("Erich", "Gamma"));
+        Person person = new Person("Kent", "Beck");
+        personDao.save(person);
+        personDao.save(new Person("Ralph", "Johnson"));
+
+        Person personFromDb = personDao.findPersonsByFirstnameQueryDSL("Kent").get(0);
+        Assert.assertEquals(person.getId(), personFromDb.getId());
+    }
+}

querydsl/src/test/resources/db.properties

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+#In memory db
+db.username=sa
+db.password=
+db.driver=org.hsqldb.jdbcDriver
+db.url=jdbc:hsqldb:mem:app-db
+db.dialect=org.hibernate.dialect.HSQLDialect

querydsl/src/test/resources/test-context.xml

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+<?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:mvc="http://www.springframework.org/schema/mvc"
+       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
+       xmlns:sec="http://www.springframework.org/schema/security"
+       xmlns:aop="http://www.springframework.org/schema/aop"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
+		http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-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/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
+        >
+
+    <tx:annotation-driven />
+    <context:component-scan base-package="org.baeldung" />
+
+    <import resource="test-db.xml" />
+
+</beans>

querydsl/src/test/resources/test-db.xml

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+<?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:mvc="http://www.springframework.org/schema/mvc"
+       xmlns:context="http://www.springframework.org/schema/context"
+       xmlns:tx="http://www.springframework.org/schema/tx"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
+		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd" default-autowire="byName">
+
+    <bean id="placeholderConfig"
+          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
+        <property name="locations">
+            <list>
+                <value>classpath:db.properties</value>
+            </list>
+        </property>
+    </bean>
+
+    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" name="EntityManagerFactory">
+        <property name="persistenceUnitName" value="default"></property>
+        <property name="dataSource" ref="dataSource"></property>
+        <property name="jpaVendorAdapter">
+            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
+                <property name="showSql" value="true" />
+                <property name="generateDdl" value="true" />
+                <property name="databasePlatform" value="${db.dialect}" />
+            </bean>
+        </property>
+    </bean>
+
+    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
+          destroy-method="close">
+        <property name="driverClassName" value="${db.driver}" />
+        <property name="url" value="${db.url}" />
+        <property name="username" value="${db.username}" />
+        <property name="password" value="${db.password}" />
+    </bean>
+
+    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" name="TransactionManager">
+        <property name="entityManagerFactory" ref="entityManagerFactory"></property>
+    </bean>
+
+    <tx:annotation-driven />
+
+    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
+
+</beans>