Informações:   Loading application [novo] at [/novo]
Informações:   novo was successfully deployed in 6.036 milliseconds.
Informações:   ESTA É A HOME DA EDFRANGOS.
Informações:   Opcao{nomeOpcao=nada, somaOuDiminui=s}
Advertência:   StandardWrapperValve[dispatcher]: Servlet.service() for servlet dispatcher threw exception
java.lang.NullPointerException

package br.com.novo.edfrangos.daos;

import br.com.novo.edfrangos.models.Opcao;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

@Repository
@Transactional
public class OpcaoDAO {

    @PersistenceContext
    private EntityManager manager;

    public void gravar(Opcao opcao) {
        manager.persist(opcao);
    }

}

package br.com.novo.edfrangos.conf;

import javax.persistence.EntityManagerFactory;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import java.util.Properties;

@EnableTransactionManagement
public class JPAConfiguration {

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean factoryBean
                = new LocalContainerEntityManagerFactoryBean();

        JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();

        factoryBean.setJpaVendorAdapter(vendorAdapter);

        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setUsername("postgres");
        dataSource.setPassword("123456");
        dataSource.setUrl("jdbc:postgresql://localhost:5432/edfrangos");
        dataSource.setDriverClassName("org.postgresql.Driver");

        factoryBean.setJtaDataSource(dataSource);

        Properties props = new Properties();
        props.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
        props.setProperty("hibernate.show_sql", "true");
        props.setProperty("hibernate.hbm2ddl.auto", "update");
        factoryBean.setJpaProperties(props);

        factoryBean.setPackagesToScan("br.com.novo.edfrangos.models");

        return factoryBean;

    }

    @Bean
    public JpaTransactionManager transactionManager(EntityManagerFactory emf) {
        return new JpaTransactionManager(emf);
    }

}

package br.com.novo.edfrangos.controllers;

import br.com.novo.edfrangos.daos.OpcaoDAO;
import br.com.novo.edfrangos.models.Opcao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;


@Controller
public class OpcaoController {

    @Autowired
    private OpcaoDAO opcaoDAO;

    @RequestMapping("/opcao/form")
    public String form() {
        return "opcao/form";
    }

    @RequestMapping("/opcao")
    public String gravar(Opcao opcao) {
        System.out.println(opcao);
        opcaoDAO.gravar(opcao);
        return "opcao/ok";
    }
}

package br.com.novo.edfrangos.controllers;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HomeController {

    @RequestMapping("/")
    public String index() {
        System.out.println("ESTA É A HOME DA EDFRANGOS.");
        return "home";
    }
}

package br.com.novo.edfrangos.conf;

import br.com.novo.edfrangos.controllers.HomeController;
import br.com.novo.edfrangos.daos.OpcaoDAO;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@EnableWebMvc
@ComponentScan(basePackageClasses = {HomeController.class, OpcaoDAO.class})
public class AppWebConfiguration {

    @Bean
    public InternalResourceViewResolver internalResourceViewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }

}