✨Feat: 完成 LLM 接入

src/main/java/com/wonderland/stardewvalley/ai/ChatUtil.java

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+package com.wonderland.stardewvalley.ai;
+
+import jakarta.annotation.Resource;
+import org.springframework.ai.chat.client.ChatClient;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ChatUtil {
+
+    private final ChatClient chatClient;
+
+    public ChatUtil(ChatClient.Builder chatClientBuilder) {
+        this.chatClient = chatClientBuilder.build();
+    }
+
+    public String doChat(String background, String input) {
+        String content = chatClient
+                .prompt()
+                .system("你是一个AI助手，请根据背景和输入生成回复")
+                .user("[BackGround]: " + background + "\n[Input]: " + input)
+                .call()
+                .content();
+        return content;
+    }
+}

src/main/java/com/wonderland/stardewvalley/constant/BackGroundConstant.java

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+package com.wonderland.stardewvalley.constant;
+
+import lombok.Getter;
+
+@Getter
+public class BackGroundConstant {
+
+    private static final String BACKGROUND_SPRING = "春天";
+    private static final String BACKGROUND_SUMMER = "夏天";
+    private static final String BACKGROUND_AUTUMN = "秋天";
+    private static final String BACKGROUND_WINTER = "冬天";
+}

src/main/java/com/wonderland/stardewvalley/controller/ChatController.java

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+package com.wonderland.stardewvalley.controller;
+
+import com.wonderland.stardewvalley.ai.ChatUtil;
+import com.wonderland.stardewvalley.entity.AIChatRequest;
+import jakarta.annotation.Resource;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("chat")
+public class ChatController {
+
+    @Resource
+    private ChatUtil chatUtil;
+
+    @PostMapping
+    public String chat(@RequestBody AIChatRequest aiChatRequest) {
+        return chatUtil.doChat(aiChatRequest.getBackGround(), aiChatRequest.getContent());
+    }
+}

src/main/java/com/wonderland/stardewvalley/entity/AIChatRequest.java

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+package com.wonderland.stardewvalley.entity;
+
+import lombok.Data;
+
+@Data
+public class AIChatRequest {
+    private String backGround;
+    private String content;
+}