Question

有一个Country类：

public class Country { 
    public int id;  
    public String name;
    public String locale;
}

我必须插入neo4j。

我在做什么：

public void insert(Country country) {
        engine.query("create (n:Country {name:'"+country.name+"',id:"+country.id+",locale:'"+country.locale+"'})",null);
}

但是我想把对象直接放到带有标签的neo4j上。

我正在使用play框架2.3.7与java 1.8和libraryDependencies是

"org.neo4j" % "neo4j-rest-graphdb" % "2.0.1",
  "com.sun.jersey" % "jersey-server" % "1.7",
  "com.sun.jersey" % "jersey-core" % "1.7",
  "com.sun.jersey" % "jersey-json" % "1.7",

Answer 1

您可以使用spring-data-neo4j来满足您的要求。详细步骤

1.将依赖项添加到build.sbt

      "org.springframework.data" % "spring-data-neo4j" % "3.2.2.RELEASE",
      "org.springframework.data" % "spring-data-neo4j-rest" % "3.2.2.RELEASE",
      "org.springframework.data" % "spring-data-neo4j-tx" % "3.2.2.RELEASE"

Global.java

public class Global extends GlobalSettings {
    private ApplicationContext ctx;

    @Override
    public void onStart(Application app) {
        ctx = new AnnotationConfigApplicationContext(Neo4jConfig.class);
    }

    @Override
    public <A> A getControllerInstance(Class<A> clazz) {
        return ctx.getBean(clazz);
    }

    @Override
    public void onStop(Application app){
        ((AnnotationConfigApplicationContext)ctx).close();
    }

}

Neo4j连接的配置类

@Configuration
@EnableTransactionManagement
public class Neo4jConfig extends Neo4jConfiguration {

      public Neo4jConfig() {
          setBasePackage("model");// My Entity package
      }     
   @Bean
   public SpringRestGraphDatabase graphDatabaseService() {      
        return new SpringRestGraphDatabase("http://localhost:7474/db/data");
  }   
  @Override
  @Bean(name = "transactionManager")
  public PlatformTransactionManager neo4jTransactionManager() throws Exception {
     return new JtaTransactionManagerFactoryBean(getGraphDatabaseService()).getObject();
  }    
}

使用NodeEntity

注释您的国家/地区类

@NodeEntity
public class Country{ 
    public int id;  
    public String name;
    public String locale;
}

使用Neo4jTemplate将对象保存到Graph DB

@Autowired
Neo4jTemplate template;

public Country save(Country country){
    return template.save(country);
}

使用restapifacade在Play框架中对Neo4j进行Java对象映射

1 个答案: