liang-ai/src/main/java/com/ai/controller/LangChainController.java

package com.ai.controller;

import com.ai.service.Assist;
import com.ai.service.LangChainService;
import dev.langchain4j.community.model.dashscope.QwenChatModel;
import dev.langchain4j.memory.ChatMemory;
import dev.langchain4j.memory.chat.MessageWindowChatMemory;
import dev.langchain4j.model.chat.ChatLanguageModel;
import dev.langchain4j.service.AiServices;
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.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/langchain")
public class LangChainController {

    @Autowired
    private LangChainService langChainService;

    @Autowired
    private Assist assist;

    /**
     * 处理用户输入并调用 LangChainService 获取响应
     * @param input 用户输入的内容
     * @return 大语言模型生成的响应
     */
    @GetMapping("/chat")
    public String chat(@RequestParam("input") String input) {
        System.out.println("start chat...");
        return langChainService.getResponse(input);
    }

    @GetMapping("/high/chat")
    public String highChat(@RequestParam("input") String input) {
        System.out.println("start highlevel chat...");
        return assist.chat(input);
    }

//    ChatLanguageModel qwenModel = QwenChatModel.builder()
//            .apiKey("sk-2f703a41fff0488e9b6888013d2ee58a")
//            .modelName("deepseek-v3")
//            .build();
//
//    ChatMemory chatMemory = MessageWindowChatMemory.builder()
//            .maxMessages(10)
//            .build();
//
//    Assist assist = AiServices.builder(Assist.class)
//            .chatLanguageModel(qwenModel) // the model
//            .chatMemoryProvider(memoryId -> MessageWindowChatMemory.withMaxMessages(10)) // memory
//            .build();

    @GetMapping("/high/memory-chat")
    public String memoryChat(@RequestParam("memoryId") String memoryId, @RequestParam("input") String input) {
        System.out.println("start highlevel memory chat...");
        return assist.memoryChat(memoryId, input);
    }
}