I am days into this, and - although I am learning a lot - starting to despair. 

I have tried all the suggestions on this excellent question: 

[No Persistence provider for EntityManager named](https://stackoverflow.com/questions/1158159/no-persistence-provider-for-entitymanager-named)

I had this working at one point using the ubiquitous HibernateUtil class, but was told to move to a plain JPA style here:

[Spring RESTful controller method improvement suggestions](https://stackoverflow.com/questions/20804768/spring-restful-controller-method-improvement-suggestions)

Unfortunately, I could not get the bean injection to work properly in spring-boot. Here is my attempt:

[Spring JPA (Hibernate) No qualifying bean of type: javax.persistence.EntityManagerFactory](https://stackoverflow.com/questions/20808290/spring-jpa-hibernate-no-qualifying-bean-of-type-javax-persistence-entitymanag)

After much work down that path I ended up with a null entity manager. I found this and began to think it could not work:

[Using JPA2 in Tomcat 6: @PersitenceContext doesn't work, EntityManager is null](https://stackoverflow.com/questions/11256746/using-jpa2-in-tomcat-6-persitencecontext-doesnt-work-entitymanager-is-null)

It seems to me like the EntityManagerFactory absolutely should be a bean in whatever context spring-boot creates, but ... whatever. I would think that at least this would work:

Application launch:

```
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

```

Controller:

```
@Controller
public class GetController {

    private static final String PERSISTENCE_UNIT_NAME = "cpJpaPu";  

    @RequestMapping(value = "/user", method = RequestMethod.GET)
    public @ResponseBody User getUser(@RequestParam(value="id", required=true) int id) {
        User user = null;

        EntityManagerFactory emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
        EntityManager em = emf.createEntityManager();
        UserDAO userDao = new UserDAO();
        userDao.setEntityManager(em);
        user = userDao.load(id);

        return user;
    }
}

```

DAO:

```
public class UserDAO {

    public EntityManager entityManager;

    public void setEntityManager(EntityManager entityManager) {
        this.entityManager = entityManager;
    }

    public EntityManager getEntityManager() {
        return entityManager;
    }   

    public void insert(User user) {
        entityManager.persist(user);
    }

    public User load(int id) {
        return entityManager.find(User.class, id);
    }
}

```

/src/main/resources/persistence.xml:

```
<persistence 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_1_0.xsd" version="1.0">
  <persistence-unit name="cpJpaPu" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <class>com.mydomain.User</class>
    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
      <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
      <property name="hibernate.show_sql" value="false"/>
      <property name="hibernate.connection.username" value="user"/>
      <property name="hibernate.connection.password" value=""/>
      <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/mydb"/>
    </properties>
  </persistence-unit>
</persistence>

```

And it doesn't work:

```
javax.persistence.PersistenceException: No Persistence provider for EntityManager named cpJpaPu
    javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:61)
    javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
    com.mydomain.GetController.getUser(GetController.java:25)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    java.lang.reflect.Method.invoke(Unknown Source)
    org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)
    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:748)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
    org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:947)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:878)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:946)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:837)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:822)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

```

--- Added Info ---

POM:

```
<?xml version="1.0" encoding="UTF-8"?>
<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>com.mygroup</groupId>
    <artifactId>myartifact</artifactId>
    <version>0.1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>0.5.0.M6</version>
    </parent>

    <dependencies>
        <!--  Spring framework -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--  Hibernate -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.3.0.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <!-- Must override version or face stack traces -->
            <version>4.3.0.Final</version>
        </dependency>

        <!-- Spring ORM, works with Hibernate -->   
        <dependency>
           <groupId>org.springframework</groupId>
           <artifactId>spring-orm</artifactId>
        </dependency>

        <!--  Spring implementation of Jackson for RESTful JSON -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>         
        </dependency>

        <!--  JDBC -->
        <dependency>
            <groupId>postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.1-901.jdbc4</version>
        </dependency>

        <!-- Logging -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </dependency>

        <!-- Prevent logging conflicts -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
            <scope>compile</scope>
            <exclusions>                
                <exclusion>
                    <groupId>ch.qos.logback</groupId>
                    <artifactId>logback-classic</artifactId>
                </exclusion>
            </exclusions> 
        </dependency>
    </dependencies>

    <properties>
        <start-class>com.cloudfordev.controlpanel.Application</start-class>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <build>
        <plugins>   
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>          
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots><enabled>true</enabled></snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots><enabled>true</enabled></snapshots>
        </pluginRepository>
    </pluginRepositories>
</project>

```