<!--对话记忆 chat-memory-->
<dependency>
    <groupId>org.springframework.ai</groupId>
    <artifactId>spring-ai-autoconfigure-model-chat-memory</artifactId>
</dependency>

<!-- Spring AI JDBC 聊天记忆核心依赖 -->
<dependency>
    <groupId>org.springframework.ai</groupId>
    <artifactId>spring-ai-starter-model-chat-memory-repository-jdbc</artifactId>
</dependency>
<!-- Spring Boot JDBC Starter -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- MySQL 驱动 -->
<dependency>
    <groupId>com.mysql</groupId>
    <artifactId>mysql-connector-j</artifactId>
    <scope>runtime</scope>
</dependency>

server:
  port: 18081
spring:
  ai:
    dashscope:
      api-key: sk-8718a83408d7443b9544cXXXXXXXX
    chat:
      memory:
        repository:
          jdbc:
            initialize-schema: always
            schema: classpath:/sql/schema-mysql.sql
  datasource:
    url: jdbc:mysql://192.168.91.165:3306/springai?useSSL=false&serverTimezone=UTC
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver
logging:
  level:
    org.springframework.ai.chat.client.advisor.SimpleLoggerAdvisor: debug
    #org.springframework.ai.chat.client.advisor: debug

3、config

import org.springframework.ai.chat.memory.ChatMemory;
import org.springframework.ai.chat.memory.ChatMemoryRepository;
import org.springframework.ai.chat.memory.MessageWindowChatMemory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class config {

@Bean
ChatMemory chatMemoryJdbc(JdbcChatMemoryRepository chatMemoryRepository) {
    return MessageWindowChatMemory
            .builder()
            // 自定义最大消息数，覆盖默认的20条 （2 轮用户 + 助手对话）
            //保留最近 4 条消息。若超出则删除最早的消息
            .maxMessages(4)
            // 绑定JDBC持久化仓库（支持多用户会话隔离）
            .chatMemoryRepository(chatMemoryRepository)
            .build();
}

}

4、resources/sql/schema-mysql.sql

CREATE TABLE IF NOT EXISTS SPRING_AI_CHAT_MEMORY (
    `conversation_id` VARCHAR(36) NOT NULL COMMENT '会话ID，区分不同对话',
    `content` TEXT NOT NULL COMMENT '序列化后的对话消息内容（JSON格式）',
    `type` VARCHAR(10) NOT NULL COMMENT '消息类型（USER/ASSISTANT/SYSTEM等）',
    `timestamp` TIMESTAMP NOT NULL COMMENT '消息时间戳，用于排序',
    INDEX `SPRING_AI_CHAT_MEMORY_CONVERSATION_ID_TIMESTAMP_IDX` (`conversation_id`, `timestamp`)
    );

5、controller

import com.alibaba.cloud.ai.dashscope.chat.DashScopeChatModel;
import com.sb.dashscope18081.tool.ReReadingAdvisor;
import org.springframework.ai.chat.client.ChatClient;
import org.springframework.ai.chat.client.advisor.PromptChatMemoryAdvisor;
import org.springframework.ai.chat.memory.ChatMemory;
import org.springframework.ai.chat.memory.MessageWindowChatMemory;
import org.springframework.ai.chat.messages.Message;
import org.springframework.ai.chat.messages.UserMessage;
import org.springframework.ai.chat.model.ChatResponse;
import org.springframework.ai.chat.prompt.Prompt;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.List;
@RequestMapping("/openai")
@ResponseBody
@Controller
public class ChatMemoryController {
    @Autowired
    private ChatClient.Builder chatClientBuilder;
    @Autowired
    DashScopeChatModel chatModel;
     @Autowired
    //保留最近 10 条消息。若超出则删除最早的消息
    //JDBC  chatMemoryJdbc
    private ChatMemory chatMemoryJdbc;
        /**
     * 基于 ChatMemoryJdbc 历史对话长度
     */
    @GetMapping("/simple/chatmemoryjdbc")
    public String chatmemoryjdbc () {
        String conversationId = "jdbc001";
        ChatClient chatClient = ChatClient.builder(chatModel)
                .defaultAdvisors(
                        PromptChatMemoryAdvisor.builder(chatMemoryJdbc).build()
                )
                .build();
        String content= chatClient.prompt()
                .user("你好，我叫谢安!")
                .advisors(new ReReadingAdvisor())
                .advisors(advisorSpec->advisorSpec.param(ChatMemory.CONVERSATION_ID,conversationId))
                .call()
                .content();
        System.out.println("content：" + content);
        String content2= chatClient.prompt()
                 .user("我叫什么？")
                .advisors(new ReReadingAdvisor())
                .advisors(advisorSpec->advisorSpec.param(ChatMemory.CONVERSATION_ID,conversationId))
                .call()
                .content();
        System.out.println("content2：" + content2);
        return  "content：" +content+" content2：" +content2;
    }
}