pom.xml添加内容

<dependencies>
<!-- 服务器开发需要的jar包 -->
<groupId>org.neo4j.driver</groupId>
<artifactId>neo4j-java-driver</artifactId>
<version>1.5.0</version>
</dependency>
<dependency>
<!-- 嵌入式开发需要的jar包 -->
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>3.3.4</version>
</dependency>
</dependencies>

Neo4j服务器开发

java代码:

import org.neo4j.driver.v1.*;

import static org.neo4j.driver.v1.Values.parameters;

/**
* @author yejianyu
* @date 2020/3/30
*/
public class Main {
public static void main(String[] args) {
Driver driver = GraphDatabase.driver("bolt://localhost:7687", AuthTokens.basic("neo4j","123456"));
Session session = driver.session();
session.run("CREATE (n:Person {name: {name},title: {title}})",
parameters( "name", "Arthur001", "title", "King001" ));
StatementResult result = session.run( "MATCH (a:Person) WHERE a.name = {name} " +
"RETURN a.name AS name, a.title AS title",
parameters( "name", "Arthur001" ) );
while (result.hasNext()) {
Record record = result.next();
System.out.println( record.get( "title" ).asString() + " " + record.get( "name" ).asString() );
}
session.close();
driver.close();
}
}

嵌入式开发

java代码:

import org.neo4j.graphdb.*;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

/**
* @author yejianyu
* @date 2020/3/30
*/
public class Main2 {
public static void main(String[] args) {
//创建、加载数据库
GraphDatabaseService graphdb = new GraphDatabaseFactory().newEmbeddedDatabase(new File("C://lsw/graph"));
System.out.println("Database Load!");
//开启事务
try (Transaction tx = graphdb.beginTx()){
Node steve = graphdb.createNode(Lables.USER);
steve.setProperty("name","steve");
Node linda = graphdb.createNode(Lables.USER);
linda.setProperty("name","linda");
steve.createRelationshipTo( linda, RelationshipTypes.IS_FRIEND_OF );
System.out.println("created node name is " + steve.getProperty("name"));
tx.success();
}
//查询数据库
String query ="match (n:USER) return n.name as name";
Map<String, Object > parameters = new HashMap<String, Object>();
try ( Result result = graphdb.execute( query, parameters ) ) {
while ( result.hasNext() ) {
Map<String, Object> row = result.next();
for ( String key : result.columns() ) {
System.out.printf( "%s = %s%n", key, row.get( key ) );
}
}
}
registerShutdownHook(graphdb);
System.out.println("Database Shutdown!");
}
//设置标签,必须继承Label接口
public enum Lables implements Label{
USER, MOVIE;
}
public enum RelationshipTypes implements RelationshipType{
IS_FRIEND_OF, HAS_SEEN;
}

private static void registerShutdownHook(final GraphDatabaseService graphDb){
Runtime.getRuntime().addShutdownHook(new Thread(){
@Override
public void run(){
graphDb.shutdown();
}
});
}
}