Ao tentar rodar minha aplicação estou tendo o seguinte erro:
Exception in thread "main" java.lang.NullPointerException
at br.com.projeto.controller.ProdutoController.listar(ProdutoController.java:18)
at br.com.projeto.ui.Main.main(Main.java:14)pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>br.com.projeto</groupId>
<artifactId>teste</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.2.1.Final</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.3.173</version>
</dependency>
<dependency>
<groupId>apache-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
</dependencies>
</project>src/main/resources/spring-context.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
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-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd">
<context:annotation-config />
<jpa:repositories base-package="br.com.projeto.repository" />
<context:component-scan
base-package="br.com.projeto.controller, br.com.projeto.service, br.com.projeto.repository" />
<bean id="placeholderConfig"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:hibernate.properties" />
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${hibernate.connection.driver_class}" />
<property name="url" value="${hibernate.connection.url}" />
<property name="username" value="${hibernate.connection.username}" />
<property name="password" value="${hibernate.connection.password}" />
</bean>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="persistenceUnitName" value="projetoPU" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
</beans>src/main/resources/hibernate.properties
hibernate.connection.driver_class=org.h2.Driver
hibernate.connection.url=jdbc:h2:tcp://localhost/~/projeto
hibernate.connection.username=sa
hibernate.connection.password=src/main/resources/META-INF/persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="projetoPU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>br.com.projeto.model.Produto</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
<property name="hibernate.default_schema" value="projeto" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="false" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
</persistence>
Main.java
package br.com.projeto.ui;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import br.com.projeto.controller.ProdutoController;
public class Main {
public static void main(String[] args) {
new ClassPathXmlApplicationContext("classpath:spring-context.xml");
ProdutoController p = new ProdutoController();
p.listar();
}
}ProdutoController
package br.com.projeto.controller;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import br.com.projeto.model.Produto;
import br.com.projeto.service.ProdutoService;
@Controller
public class ProdutoController {
@Resource
private ProdutoService produtoService;
public List<Produto> listar() {
return produtoService.listar();
}
}ProdutoService
package br.com.projeto.service;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import br.com.projeto.model.Produto;
import br.com.projeto.repository.ProdutoRepository;
@Service
public class ProdutoService {
@Resource
private ProdutoRepository produtoRepository;
@Transactional
public List<Produto> listar(){
return produtoRepository.listar();
}
}
ProdutoRepository
package br.com.projeto.repository;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import org.springframework.stereotype.Repository;
import br.com.projeto.model.Produto;
@Repository
public class ProdutoRepository {
@PersistenceContext
protected EntityManager entityManager;
@SuppressWarnings("unchecked")
public List<Produto> listar(){
Query query = entityManager.createNativeQuery("SELECT * FROM produto", Produto.class);
return query.getResultList();
}
}