1 依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.5.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.xu</groupId>
    <artifactId>lang-chain</artifactId>
    <version>1.0.0</version>
    <name>lang-chain</name>

    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>25</java.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>dev.langchain4j</groupId>
                <artifactId>langchain4j-bom</artifactId>
                <version>1.7.0</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>dev.langchain4j</groupId>
                <artifactId>langchain4j-community-bom</artifactId>
                <version>1.7.1-beta14</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>

        <!--Spring Boot 的 Web starter-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--LangChain4j 的 Spring Boot starter-->
        <dependency>
            <groupId>dev.langchain4j</groupId>
            <artifactId>langchain4j-spring-boot-starter</artifactId>
        </dependency>

        <!--LangChain4j 针对 OpenAI 的 Spring Boot starter-->
        <dependency>
            <groupId>dev.langchain4j</groupId>
            <artifactId>langchain4j-open-ai-spring-boot-starter</artifactId>
        </dependency>

        <!--LangChain4j 对 Ollama 的支持库-->
<!--        <dependency>-->
<!--            <groupId>dev.langchain4j</groupId>-->
<!--            <artifactId>langchain4j-ollama</artifactId>-->
<!--        </dependency>-->

        <!--LangChain4j RAG 的最简单方法-->
        <dependency>
            <groupId>dev.langchain4j</groupId>
            <artifactId>langchain4j-easy-rag</artifactId>
        </dependency>

        <!--LangChain4j 对 redis 向量扩展（vector）的支持库-->
        <dependency>
            <groupId>dev.langchain4j</groupId>
            <artifactId>langchain4j-community-redis-spring-boot-starter</artifactId>
        </dependency>

        <!--Spring Boot 的开发工具，提供热部署、自动重启等功能，加速开发过程-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!--简化 Java 代码的工具库-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!--Spring Boot 的测试 starter-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

2 配置

server:
  port: 8080
  servlet:
    context-path: /

spring:
  application:
    name: langchain4j

logging:
  file:
    name: logs/spring-oracle.log
  level:
    root: INFO
    com.xu: INFO

langchain4j:
  community:
    redis:
      host: localhost
      port: 6379
      user: langchain4j
      password: 123456
      indexName: langchain4j
      prefix: ":lc4j:"
      dimension: 1536
      metadataKeys:
        - username
        - age
        - source
        - category

3 代码

3.1 RagConf

package com.xu.conf;

import dev.langchain4j.community.store.embedding.redis.RedisEmbeddingStore;
import dev.langchain4j.data.segment.TextSegment;
import dev.langchain4j.store.embedding.EmbeddingStore;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class RagConf {

    @Bean
    public EmbeddingStore<TextSegment> embeddingStore() {
        return RedisEmbeddingStore.builder()
                .host("127.0.0.1")
                .port(6379)
                .dimension(1536)
                .build();
    }

}

3.2 RagController

package com.xu.controller;

import dev.langchain4j.data.document.Document;
import dev.langchain4j.data.document.loader.FileSystemDocumentLoader;
import dev.langchain4j.data.segment.TextSegment;
import dev.langchain4j.store.embedding.EmbeddingStore;
import dev.langchain4j.store.embedding.EmbeddingStoreIngestor;
import lombok.AllArgsConstructor;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@AllArgsConstructor
@RequestMapping("/ollama/rag")
public class RagController {

    private final EmbeddingStore<TextSegment> embeddingStore;

    @GetMapping("/save")
    public Object save() {
        List<Document> documents = FileSystemDocumentLoader.loadDocuments("D:\\SourceCode\\简历");
        if (CollectionUtils.isEmpty(documents)) {
            return 0;
        }
        EmbeddingStoreIngestor.ingest(documents, embeddingStore);
        return documents.size();
    }

}

4 结果