我有一些Java代码，希望将其转换为可以通过依赖项注入在Grails控制器和服务中使用的Bean。该代码基于此处的代码（作为独立Java应用程序运行时效果很好）。

具体来说，我有：

// WannabeABeanDB.java
package hello;

import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;
import org.neo4j.kernel.impl.util.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.neo4j.config.EnableNeo4jRepositories;
import org.springframework.data.neo4j.config.Neo4jConfiguration;
import org.springframework.data.neo4j.core.GraphDatabase;

import java.io.File;

@Component
@Configuration
@EnableNeo4jRepositories(basePackages = "hello")
public class WannabeABeanDB extends Neo4jConfiguration {

    public WannabeABeanDB() {
        setBasePackage("hello");
    }

    @Bean
    GraphDatabaseService graphDatabaseService() {
        return new GraphDatabaseFactory().newEmbeddedDatabase("accessingdataneo4j.db");
    }

    @Autowired
    PersonRepository personRepository;

    @Autowired
    GraphDatabase graphDatabase;

    public String testThatWeCanAccessDatabase() throws Exception {
        Person greg = new Person("Greg");

        Transaction tx = graphDatabase.beginTx();
        try {
            personRepository.save(greg);
            greg = personRepository.findByName("Greg").toString();
            tx.success();
        } finally {
            tx.close();
        }
        return greg.name;

    }    
}



// Person.java
package hello;

import java.util.HashSet;
import java.util.Set;

import org.neo4j.graphdb.Direction;
import org.springframework.data.neo4j.annotation.Fetch;
import org.springframework.data.neo4j.annotation.GraphId;
import org.springframework.data.neo4j.annotation.NodeEntity;
import org.springframework.data.neo4j.annotation.RelatedTo;

@NodeEntity
public class Person {

    @GraphId Long id;
    public String name;

    public Person() {}
    public Person(String name) { this.name = name; }

    public String toString() {
        return this.name;
    }
}



// PersonRepository.java
package hello;

import org.springframework.data.repository.CrudRepository;

public interface PersonRepository extends CrudRepository<Person, String> {    
    Person findByName(String name);    
}

所以现在我想从控制器使用：

// TestController.groovy
package hello

import hello.WannabeABeanDB

class TestController {

WannabeABeanDB graph

def index() { 
    render graph.test()
    }
}

我已经设置（在Config.groovy中）：

grails.spring.bean.packages = ['hello']

但是，当我执行grails运行应用程序时，Grails崩溃，并显示一条很长的错误消息，提示它不能与空数据库一起使用。我不认为PersonRepository或graphDatabase都可以使用@Autowire。

所以问题是，要在Grails控制器或服务中将Bean内的Java代码（在src / java中）编写为Bean，我还需要做什么？