java连接neo4j

呼、博客要落灰了

记录一下Java连接neo4j的问题。

首先是neo4j的下载和配置，基本参考https://blog.csdn.net/appleyk/article/details/79091898

1、下载jdk

2、下载neo4j的community版本或者desktop版本 下载地址：https://neo4j.com/download-center/

3、配置环境变量 NEO4J_HOME=解压地址、path=%NEO4J_HOME%\bin;

4、验证是否安装成功:在cmd中运行neo4j.bat console

5、注册neo4j服务：neo4j install-service

6、注册后就可以使用neo4j start 来启动服务。

然后是在eclipse中新建maven项目

1、利用maven导入neo4j和java连接的包neo4j-java-driver

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.recom</groupId>
  <artifactId>recommender</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
  <!-- https://mvnrepository.com/artifact/org.neo4j.driver/neo4j-java-driver -->
    <dependency>
        <groupId>org.neo4j.driver</groupId>
        <artifactId>neo4j-java-driver</artifactId>
        <version>1.7.2</version>
    </dependency>
  
  </dependencies>
</project>

2、编写类测试连接

public class App {
    public static void main(String[] args) {
        Driver driver=GraphDatabase.driver("bolt://localhost:7687",AuthTokens.basic("neo4j", "neo4j"));
        try(Session session=driver.session()){
            try(Transaction transaction=session.beginTransaction()){
                transaction.run("create(n:A1{NAME:{NAME},TITLE:{TITLE}})", Values.parameters("NAME","james","TITLE","King"));
                transaction.success();
            }
            try(Transaction tx=session.beginTransaction()) {
                StatementResult result=tx.run("match(a:A1) WHERE a.NAME = {NAME} RETURN a.NAME AS NAME,a.TITLE AS TITLE", Values.parameters("NAME","james"));
                while (result.hasNext()) {
                    Record record=result.next();
                    System.out.println(String.format("%s %s",record.get("TITLE").asString(),record.get("NAME").asString()));
                    
                }
            } 
        }
        driver.close();
    }
}

 在测试时发现报以下错误    “The client is unauthorized due to authentication failure.”

解决方法：修改neo4j.conf配置文件，取消验证机制，修改如下：

将配置文件中的dbms.security.auth_enabled=false前的注释符号去掉