Spring Boot 和 Spring Data Neo4j 的版本不兼容。根据你提供的版本信息，Spring Boot 2.3.7.RELEASE 和 Spring Cloud Hoxton.SR9 是较旧的版本，而 Spring Data Neo4j 在这类版本中可能不会自动配置 Neo4jClient

所以加入以下配置类

其实就是缺少哪个bean，配置进去就行了

package com.dreams.logistics.config;

import org.neo4j.driver.Driver;
import org.neo4j.driver.GraphDatabase;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.neo4j.core.Neo4jClient;
import org.neo4j.driver.AuthTokens;
import org.springframework.data.neo4j.core.Neo4jTemplate;
import org.springframework.data.neo4j.core.mapping.Neo4jMappingContext;

@Configuration
public class Neo4jConfig {

    @Value("${spring.data.neo4j.uri}")
    private String uri;

    @Value("${spring.data.neo4j.username}")
    private String username;

    @Value("${spring.data.neo4j.password}")
    private String password;

    @Bean
    public Driver driver() {
        // 使用 @Value 注解加载的配置来初始化 Driver
        return GraphDatabase.driver(uri, AuthTokens.basic(username, password));
    }

    @Bean
    public Neo4jClient neo4jClient(Driver driver) {
        return Neo4jClient.create(driver);
    }


    @Bean
    public Neo4jTemplate neo4jTemplate(Neo4jClient neo4jClient) {
        return new Neo4jTemplate(neo4jClient); // 传递 Neo4jClient 而不是 Driver
    }

    @Bean
    public Neo4jMappingContext neo4jMappingContext() {
        return new Neo4jMappingContext(); // 定义 Neo4jMappingContext Bean
    }

}

启动类加入：

@EnableNeo4jRepositories(basePackages = "com.dreams.logistics")

依赖：

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-neo4j</artifactId>
    <version>6.0.0</version> <!-- 根据需要使用合适的版本 -->
</dependency>

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