参考黑马的Langchain4j

src/main/java/com/cst/langchain4jheima/Langchain4jHeima20250803Application.java

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+package com.cst.langchain4jheima;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Langchain4jHeima20250803Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Langchain4jHeima20250803Application.class, args);
+    }
+
+}

src/main/java/com/cst/langchain4jheima/aiservice/CstAIService.java

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+package com.cst.langchain4jheima.aiservice;
+
+import dev.langchain4j.service.spring.AiService;
+import dev.langchain4j.service.spring.AiServiceWiringMode;
+
+/**
+ * Author: 李中华  wx: spllzh  email(qq): 28668817@qq.com
+ * Date: 2025/8/4 10:21
+ **/
+@AiService(
+        wiringMode = AiServiceWiringMode.EXPLICIT,
+        chatModel = "openAiChatModel"
+)
+public interface CstAIService {
+
+    public String chat(String message);
+}

src/main/java/com/cst/langchain4jheima/aiservice/CstAIStreamingService.java

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+package com.cst.langchain4jheima.aiservice;
+
+import dev.langchain4j.service.MemoryId;
+import dev.langchain4j.service.SystemMessage;
+import dev.langchain4j.service.UserMessage;
+import dev.langchain4j.service.spring.AiService;
+import dev.langchain4j.service.spring.AiServiceWiringMode;
+import reactor.core.publisher.Flux;
+
+/**
+ * Author: 李中华  wx: spllzh  email(qq): 28668817@qq.com
+ * Date: 2025/8/4 11:50
+ **/
+@AiService(
+        wiringMode = AiServiceWiringMode.EXPLICIT,
+        chatModel = "openAiChatModel",
+        streamingChatModel = "openAiStreamingChatModel", //配置流式 输出模型
+//        chatMemory = "chatMemory", //  配置聊天记忆对象 ，基于内存
+        chatMemoryProvider = "chatMemoryProvider"
+)
+public interface CstAIStreamingService {
+
+    @SystemMessage(fromResource = "system.txt")
+    public Flux<String> chat(String message);
+
+    @SystemMessage(fromResource = "system.txt")
+    public Flux<String> chatMemoryId(@MemoryId String memoryId, @UserMessage  String message);
+}
+
+

src/main/java/com/cst/langchain4jheima/config/CommonConfig.java

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+package com.cst.langchain4jheima.config;
+
+import com.cst.langchain4jheima.aiservice.CstAIService;
+import dev.langchain4j.memory.ChatMemory;
+import dev.langchain4j.memory.chat.ChatMemoryProvider;
+import dev.langchain4j.memory.chat.MessageWindowChatMemory;
+import dev.langchain4j.model.openai.OpenAiChatModel;
+import dev.langchain4j.service.AiServices;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Author: 李中华  wx: spllzh  email(qq): 28668817@qq.com
+ * Date: 2025/8/4 10:24
+ **/
+@Configuration
+public class CommonConfig {
+
+    @Autowired
+    private OpenAiChatModel openAiChatModel;
+
+   // @Bean
+    public CstAIService cstAIService() {
+
+        CstAIService cstAIService = AiServices.builder(CstAIService.class)
+                .chatModel(openAiChatModel)
+                .build();
+
+        return cstAIService;
+    }
+    @Bean
+    public ChatMemory chatMemory() {
+
+        MessageWindowChatMemory build = MessageWindowChatMemory.builder()
+                .maxMessages(10)
+                .build();
+        return  build;
+    }
+
+    @Bean
+    public ChatMemoryProvider chatMemoryProvider() {
+
+       ChatMemoryProvider chatMemoryProvider = new ChatMemoryProvider() {
+           @Override
+           public ChatMemory get(Object memoryId) {
+
+               MessageWindowChatMemory chatMemory =  MessageWindowChatMemory.builder()
+                       .id(memoryId)
+                       .maxMessages(10)
+                       .build();
+               return  chatMemory;
+           }
+       };
+
+       return chatMemoryProvider;
+    }
+
+
+}

src/main/java/com/cst/langchain4jheima/controller/ChatController.java

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+package com.cst.langchain4jheima.controller;
+
+import com.cst.langchain4jheima.aiservice.CstAIService;
+import com.cst.langchain4jheima.aiservice.CstAIStreamingService;
+import dev.langchain4j.model.openai.OpenAiChatModel;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+
+/**
+ * Author: 李中华  wx: spllzh  email(qq): 28668817@qq.com
+ * Date: 2025/8/4 10:04
+ **/
+@RestController
+public class ChatController
+{
+    @Autowired
+    private OpenAiChatModel model;
+
+    @Autowired
+    CstAIStreamingService streamingModel;
+
+    @GetMapping("/chat")
+    public String chat(String question)
+    {
+        String chat = model.chat(question);
+        return chat;
+    }
+
+
+
+    @Autowired
+    private CstAIService cstService;
+
+    @GetMapping("/chatByInterface" )
+    public String chatByInterface(String question)
+    {
+        String chat = cstService.chat(question);
+
+        return chat;
+    }
+
+
+    @GetMapping("/chatByStreaming" )
+    public Flux<String> chatByStreaming(String question)
+    {
+        Flux<String> chat = streamingModel.chat(question);
+
+        return chat;
+    }
+
+    /**
+     * 通过 memoryId ,实现会话隔离
+     * @param memoryId
+     * @param question
+     * @return
+     */
+    @GetMapping("/chatByStreamingByMemoryId" )
+    public Flux<String> chatByStreamingByMemoryId(String memoryId,String question)
+    {
+        Flux<String> chat = streamingModel.chatMemoryId(memoryId,question);
+
+        return chat;
+    }
+}

src/main/resources/application.properties

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+spring.application.name=Langchain4j-heima20250803

src/main/resources/application.yml

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+langchain4j:
+  open-ai:
+    chat-model:
+      base-url: https://dashscope.aliyuncs.com/compatible-mode/v1
+      api-key: ${DASHSCOPE_API_KEY}
+      model-name: qwen-plus
+      log-requests: true
+      log-responses: true
+    streaming-chat-model:
+      base-url: https://dashscope.aliyuncs.com/compatible-mode/v1
+      api-key: ${DASHSCOPE_API_KEY}
+      model-name: qwen-plus
+      log-requests: true
+      log-responses: true
+
+logging:
+  level:
+    dev.langchain4j: DEBUG
+
+
+spring:
+  data:
+    redis:
+      host: localhost
+      port: 6379

src/main/resources/system.txt

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+你是传智教育提供的专业的AI志愿填报顾问，可以给用户提供如下功能:
+1.查询目标院校的院校简介
+2.查询目标院校的录取规则
+3.查询目标院校的奖学金设置状况
+4.查询目标院校的食宿条件
+5.查询目标院校招生联系方式
+6.查询目标院2024年不同专业录取情况
+7.查询热门专业
+8.查询天坑专业9.根据学生提供的分数和不同学校以及学校历年录取分数，排准合活的学校和专业，绿次根据汇配度、按照神、称、保的逻班，罗刷出合活的学校以及专业。给用户早现时黑要里10.高考志愿填报一对一沟通预约服务
+11.查询志愿指导服务预约详情1.每次回答完用户问题，
+最后都加上一句话:<br/>志愿填报需要考虑的因素有很多，如果要得到专业的志愿填报指导，建议您预约一个一对一的指导服务，是否需要预约2,下预约单需要用户提供生姓名、考生件别、考生电话、考生顶约沟通时间(日期+时间)、考生所在省份、考生预估分数，当用户表达出需要顶约志愿指导服务的意爆后。3.一旦预约成功，最后不要再跟上面第1条指定的话术，而是更改为;恭喜您，一对一志愿指导服务已经预约成功，我们会准时联系您，请注意接听电话!4.给用户的回复中，不要提及类似"根据您提供的信息/根据资料中的信息"这样的话术
+说明:
+你是传智教育提供的智能志愿填报咨询师，只回答有关高考志愿填报的问题，其它问题不予回答。

src/test/java/com/cst/langchain4jheima/AppTest.java

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+package com.cst.langchain4jheima;
+
+import dev.langchain4j.model.openai.OpenAiChatModel;
+
+/**
+ * Author: 李中华  wx: spllzh  email(qq): 28668817@qq.com
+ * Date: 2025/8/4 9:55
+ **/
+public class AppTest {
+
+
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+    }
+
+    public AppTest( String testName )
+    {
+        System.out.println( "chatModel Hello World!" );
+        // 构建chatmodel对象
+        OpenAiChatModel chatModel =  OpenAiChatModel.builder()
+                .apiKey(System.getenv("DASHSCOPE_API_KEY"))
+                .baseUrl("https://dashscope.aliyuncs.com/compatible-mode/v1")
+                .modelName("qwen-plus")
+                .logRequests(true) // 输出请求大模型的日志
+                .logResponses(true)
+                .build();
+        String chat = chatModel.chat("2008年奥运会，哪个国际金牌最多？");
+        System.out.println(chat);
+
+    }
+}

src/test/java/com/cst/langchain4jheima/Langchain4jHeima20250803ApplicationTests.java

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+package com.cst.langchain4jheima;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class Langchain4jHeima20250803ApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}