neo4j

官网下载：
https://neo4j.com/download-center/#community
教程：
http://neo4j.com.cn/public/cypher/default.html
bin下运行neo4j.bat console

在浏览器地址栏里输入http://localhost:7474
默认会跳转到 http://localhost:7474/browser
刚开始时，会弹出登录页面，默认的初始密码是neo4j，登录进去后会让你设置新的密码，设完后进入neo4j管理界面

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>

spring.data.neo4j.uri=http://localhost:7474
spring.data.neo4j.username=neo4j
spring.data.neo4j.password=123123

@MapperScan("com.fly.Mapper")
@EnableNeo4jRepositories(basePackages = "com.fly.UserDao")
public class SpringDemoApp{

package com.fly.pojo;import org.neo4j.ogm.annotation.GraphId;
import org.neo4j.ogm.annotation.NodeEntity;
import org.neo4j.ogm.annotation.Property;@NodeEntity(label = "User")
public class UserNode {@GraphIdprivate Long nodeId;@Propertyprivate String userId;@Propertyprivate String name;@Propertyprivate String age;public Long getNodeId() {return nodeId;}public void setNodeId(Long nodeId) {this.nodeId = nodeId;}public String getUserId() {return userId;}public void setUserId(String userId) {this.userId = userId;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}
}

package com.fly.pojo;import org.neo4j.ogm.annotation.EndNode;
import org.neo4j.ogm.annotation.GraphId;
import org.neo4j.ogm.annotation.RelationshipEntity;
import org.neo4j.ogm.annotation.StartNode;@RelationshipEntity(type = "UserRelation")
public class UserRelation {@GraphIdprivate Long id;@StartNodeprivate UserNode startNode;@EndNodeprivate UserNode endNode;public Long getId() {return id;}public void setId(Long id) {this.id = id;}public UserNode getStartNode() {return startNode;}public void setStartNode(UserNode startNode) {this.startNode = startNode;}public UserNode getEndNode() {return endNode;}public void setEndNode(UserNode endNode) {this.endNode = endNode;}
}

package com.fly.UserDao;import com.fly.pojo.UserRelation;
import org.springframework.data.neo4j.annotation.Query;
import org.springframework.data.neo4j.repository.GraphRepository;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Component;import java.util.List;@Component
public interface UserRelationRepository extends GraphRepository<UserRelation> {@Query("match p=(n:User)<-[r:UserRelation]->(n1:User) where n.userId={firstUserId} and n1.userId={secondUserId} return p")List<UserRelation> findUserRelationsByEachId(@Param("firstUserId")String firstUserId,@Param("secondUserId")String secondUserId);@Query("match (fu:User),(su:User) where fu.userId={firstUserId} and su.userId={secondUserId} create p=(fu)-[r:UserRelation]->(su) return p")List<UserRelation> addUserRelation(@Param("firstUserId")String firstUserId,@Param("secondUserId")String secondUserId);}

package com.fly.UserDao;import com.fly.pojo.UserNode;
import org.springframework.data.neo4j.annotation.Query;
import org.springframework.data.neo4j.repository.GraphRepository;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Component;import java.util.List;@Component
public interface UserRepository extends GraphRepository<UserNode> {@Query("MATCH (n:User) RETURN n")List<UserNode> getUserNodeList();@Query("create (n:User{age:{age},name:{name}}) RETURN n")List<UserNode> addUserNodeList(@Param("age")String age,@Param("name")String name);@Query("create (n:User{age:{age},name:{name},userId:{userId}}) RETURN n")List<UserNode> addUserNodeList(@Param("age")String age,@Param("name")String name,@Param("userId")String userId);
}

package com.fly.service;import com.fly.UserDao.UserRepository;
import com.fly.pojo.UserNode;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Service
public class UserService {@Autowiredprivate UserRepository userRepository;public void addUserNode(UserNode userNode){userRepository.addUserNodeList(userNode.getAge(),userNode.getName());}public List<UserNode> getUserNodeList(){return userRepository.getUserNodeList();}
}

import com.app.SpringDemoApp;
import com.fly.UserDao.UserRelationRepository;
import com.fly.pojo.UserNode;
import com.fly.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import java.util.List;@SpringBootTest(classes = SpringDemoApp.class)
@RunWith(SpringJUnit4ClassRunner.class)
public class UserServiceTest {@Autowiredprivate UserService userService;@Autowiredprivate UserRelationRepository userRelationRepository;@Testpublic void test1(){UserNode userNode = new UserNode();userNode.setNodeId(1L);userNode.setUserId("001");userNode.setName("张三儿");userNode.setAge("25");UserNode userNode2 = new UserNode();userNode2.setNodeId(2L);userNode2.setUserId("002");userNode2.setName("李四儿");userNode2.setAge("24");userService.addUserNode(userNode);userService.addUserNode(userNode2);}@Testpublic void test2(){List<UserNode> userNodeList = userService.getUserNodeList();for (UserNode userNode : userNodeList) {System.out.printf(userNode.getUserId());}}@Testpublic void test3(){userRelationRepository.addUserRelation("001","002");}
}