|| Java 驱动 - 升级和迁移指南 - Neo4j 文档

Java 驱动

本节介绍 Neo4j 1.7 Java 驱动与 4.x Java 驱动之间的重大变更。

Neo4j Java 驱动的最新版本可在Java 驱动的官方页面上找到。

示例 1. 1.7 Java 驱动与 4.0 Java 驱动之间的变更示例
4.0 Java 驱动的示例代码 1.7 Java 驱动的示例代码
import org.neo4j.driver.Bookmark;
import org.neo4j.driver.Driver;
import org.neo4j.driver.Query;
import org.neo4j.driver.Result;
import org.neo4j.driver.Session;
import org.neo4j.driver.SessionConfig;
import org.neo4j.driver.Transaction;
import org.neo4j.driver.Values;
...

private final Driver driver;
...
public void printGreeting( String message, Bookmark bookmark )
{
   SessionConfig sessionConfig = SessionConfig.builder()
     .withDatabase( "neo4j" )
     .withDefaultAccessMode( AccessMode.WRITE )
     .withBookmarks( bookmark ).build();

   try ( Session session = driver.session( sessionConfig );
         Transaction transaction = session.beginTransaction() )
   {
      Query query = new Query( "CREATE (a:Greeting) SET a.message = $message RETURN a.message + ', from node ' + id(a)", Values.parameters( "message", message ) );

      Result result = transaction.run( query );
      String greeting = result.single().get( 0 ).asString();
      System.out.println( greeting );
      transaction.commit(); // commit immediately here
   }
}
import org.neo4j.driver.v1.AccessMode;
import org.neo4j.driver.v1.Driver;
import org.neo4j.driver.v1.Session;
import org.neo4j.driver.v1.Statement;
import org.neo4j.driver.v1.StatementResult;
import org.neo4j.driver.v1.Transaction;
import org.neo4j.driver.v1.Values;

...

private final Driver driver;
...
public void printGreeting( String message, String bookmark )
{




   try ( Session session = driver.session( AccessMode.WRITE, bookmark );
         Transaction transaction = session.beginTransaction() )
   {
       Statement query = new Statement( "CREATE (a:Greeting) SET a.message = $message RETURN a.message + ', from node ' + id(a)", Values.parameters( "message", message ) );


       StatementResult result = transaction.run( query );
       transaction.success(); // mark success, actually commit will happen in transaction.close()
       String greeting = result.single().get( 0 ).asString();
       System.out.println( greeting );
   }
}
© . This site is unofficial and not affiliated with Neo4j, Inc.