Forwarding: Spring Boot access neo4j

(Original: https://my.oschina.net/syic/blog/798104)

Access to the neo4j in spring boot is easy to implement with spring Data neo4j.

For example, the existing data model is as shown:

This means that there are two nodes: the user and the group, and the relationship of the two nodes is a dependency, that is, the user belongs to the group.

Based on this data model, the spring data neo4j is used for modeling.

User Node Modeling:

Package Com.demo.neo4j.domain;import Org.neo4j.ogm.annotation.graphid;import org.neo4j.ogm.annotation.NodeEntity; Import org.neo4j.ogm.annotation.Relationship; @NodeEntitypublic class User {   @GraphId   private Long ID;   private String name;   @Relationship (type = "subordinate", direction = relationship.outgoing)   Private group group;   Public User () {   } public   Long getId () {      return ID;   }   public void SetId (Long id) {      this.id = ID;   }   Public String GetName () {      return name;   }   public void SetName (String name) {      this.name = name;   }   Public Group Getgroup () {      return group;   }   public void Setgroup (group group) {      this.group = Group;   }}

　　

Group Node Modeling:

Package Com.demo.neo4j.domain;import Org.neo4j.ogm.annotation.graphid;public class Group {    @GraphId    private Long ID;    private String name;    Public Group () {    } public    Long getId () {        return ID;    }    public void SetId (Long id) {        this.id = ID;    }    Public String GetName () {        return name;    }    public void SetName (String name) {        this.name = name;    }}

　　

Data Persistence Design:

Package Com.demo.neo4j.repository;import Com.demo.neo4j.domain.user;import Org.springframework.data.neo4j.repository.graphrepository;import org.springframework.stereotype.repository;@ Repositorypublic interface Userrepository extends graphrepository<user> {    User findbyname (String name);}

　　

To connect to a database using an inline method:

Compiler=org.neo4j.ogm.compiler.multistatementcyphercompilerdriver= Org.neo4j.ogm.drivers.embedded.driver.embeddeddriveruri=file:///test/graph.db

　　

Test Case:

Package Com.demo.neo4j.test;import Com.demo.neo4j.config.neo4jconfig;import Com.demo.neo4j.domain.group;import Com.demo.neo4j.domain.user;import Com.demo.neo4j.repository.userrepository;import Org.junit.Before;import Org.junit.test;import Org.junit.runner.runwith;import Org.slf4j.logger;import Org.slf4j.LoggerFactory;import Org.springframework.beans.factory.annotation.autowired;import Org.springframework.test.context.contextconfiguration;import Org.springframework.test.context.junit4.springjunit4classrunner;import Org.springframework.util.Assert; @RunWith (Springjunit4classrunner.class) @ContextConfiguration (classes = {Neo4jconfig.class}) public class Neo4jtest {private    static Logger log = Loggerfactory.getlogger (Neo4jtest.class);    @Autowired private Userrepository userrepository;        @Before public void AddData () {Group group = new Group ();        Group.setname ("admins");        User user = new user ();        User.setname ("admin");        User.setgroup (group); usErrepository.save (user);    Assert.notnull (User.getid ());        } @Test public void GetData () {User user = Userrepository.findbyname ("admin");        Assert.notnull (user); Log.info ("\n================== user name={};    Group name={} ================== ", User.getname (), User.getgroup (). GetName ()); }}

　　

Operation Result:

================== user name=admin; Group Name=admins ==================

Forwarding: Spring Boot access neo4j