refactor(service): 用 RestClient 重写 ElevenLabs 调用并替换 UUID 工具类

- 将手写 HttpURLConnection 改为 Spring RestClient，精简 64 行冗余代码
- 引入 RestClientConfig 统一配置
- 统一使用 Hutool 的 IdUtil 生成文件名称

src/main/java/com/yolo/keyborad/config/RestClientConfig.java

@@ -0,0 +1,25 @@
+package com.yolo.keyborad.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.web.client.RestClient;
+
+/**
+ * RestClient 配置类
+ * 提供连接池复用，优化 HTTP 请求性能
+ */
+@Configuration
+public class RestClientConfig {
+
+    @Bean
+    public RestClient restClient() {
+        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
+        factory.setConnectTimeout(30000);
+        factory.setReadTimeout(60000);
+
+        return RestClient.builder()
+                .requestFactory(factory)
+                .build();
+    }
+}

src/main/java/com/yolo/keyborad/service/impl/ChatServiceImpl.java

@@ -481,7 +481,7 @@ public class ChatServiceImpl implements ChatService {
         }
 
         byte[] audioBytes = Base64.getDecoder().decode(audioBase64);
-        String fileName = UUID.randomUUID() + ".mp3";
+        String fileName = IdUtil.fastSimpleUUID() + ".mp3";
 
         FileInfo fileInfo = fileStorageService.of(new ByteArrayInputStream(audioBytes))
                 .setPath(userId + "/")

src/main/java/com/yolo/keyborad/service/impl/ElevenLabsServiceImpl.java

@@ -1,7 +1,6 @@
 package com.yolo.keyborad.service.impl;
 
 import cn.hutool.core.util.StrUtil;
-import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
 import com.yolo.keyborad.common.ErrorCode;
 import com.yolo.keyborad.config.ElevenLabsProperties;
@@ -10,14 +9,10 @@ import com.yolo.keyborad.model.vo.TextToSpeechVO;
 import com.yolo.keyborad.service.ElevenLabsService;
 import jakarta.annotation.Resource;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.MediaType;
 import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestClient;
 
-import java.io.ByteArrayOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.net.HttpURLConnection;
-import java.net.URL;
-import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -34,6 +29,9 @@ public class ElevenLabsServiceImpl implements ElevenLabsService {
     @Resource
     private ElevenLabsProperties elevenLabsProperties;
 
+    @Resource
+    private RestClient restClient;
+
     private static final int MAX_TEXT_LENGTH = 5000;
 
     @Override
@@ -43,7 +41,6 @@ public class ElevenLabsServiceImpl implements ElevenLabsService {
 
     @Override
     public TextToSpeechVO textToSpeechWithTimestamps(String text, String voiceId) {
-        // 1. 参数验证
         if (StrUtil.isBlank(text)) {
             throw new BusinessException(ErrorCode.PARAMS_ERROR, "文本内容不能为空");
         }
@@ -57,111 +54,50 @@ public class ElevenLabsServiceImpl implements ElevenLabsService {
             voiceId = elevenLabsProperties.getVoiceId();
         }
 
-        HttpURLConnection connection = null;
+        String requestUrl = buildRequestUrl(voiceId);
+        Map<String, Object> requestBody = buildRequestBody(text);
+
+        log.info("调用 ElevenLabs TTS API, voiceId: {}, 文本长度: {}", voiceId, text.length());
+        long startTime = System.currentTimeMillis();
+
         try {
-            // 2. 构建请求 URL
+            String responseJson = restClient.post()
-            String requestUrl = buildRequestUrl(voiceId);
+                    .uri(requestUrl)
-            URL url = new URL(requestUrl);
+                    .contentType(MediaType.APPLICATION_JSON)
+                    .header("xi-api-key", elevenLabsProperties.getApiKey())
+                    .body(requestBody)
+                    .retrieve()
+                    .body(String.class);
 
-            // 3. 创建连接
-            connection = (HttpURLConnection) url.openConnection();
-            connection.setRequestMethod("POST");
-            connection.setDoOutput(true);
-            connection.setDoInput(true);
-            connection.setConnectTimeout(30000);
-            connection.setReadTimeout(60000);
-
-            // 4. 设置请求头
-            connection.setRequestProperty("Content-Type", "application/json");
-            connection.setRequestProperty("xi-api-key", elevenLabsProperties.getApiKey());
-
-            // 5. 构建请求体
-            Map<String, Object> requestBody = buildRequestBody(text);
-            String jsonBody = JSON.toJSONString(requestBody);
-
-            log.info("调用 ElevenLabs TTS API, voiceId: {}, 文本长度: {}", voiceId, text.length());
-            long startTime = System.currentTimeMillis();
-
-            // 6. 发送请求
-            try (OutputStream os = connection.getOutputStream()) {
-                byte[] input = jsonBody.getBytes(StandardCharsets.UTF_8);
-                os.write(input, 0, input.length);
-            }
-
-            // 7. 获取响应
-            int responseCode = connection.getResponseCode();
             long duration = System.currentTimeMillis() - startTime;
-            log.info("ElevenLabs TTS API 响应码: {}, 耗时: {}ms", responseCode, duration);
+            log.info("ElevenLabs TTS API 响应成功, 耗时: {}ms", duration);
 
-            if (responseCode == HttpURLConnection.HTTP_OK) {
+            JSONObject jsonResponse = JSONObject.parseObject(responseJson);
-                // 读取响应 JSON
+            String audioBase64 = jsonResponse.getString("audio_base64");
-                try (InputStream is = connection.getInputStream();
-                     ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
-                    byte[] buffer = new byte[8192];
-                    int bytesRead;
-                    while ((bytesRead = is.read(buffer)) != -1) {
-                        baos.write(buffer, 0, bytesRead);
-                    }
-                    String responseJson = baos.toString(StandardCharsets.UTF_8);
-                    JSONObject jsonResponse = JSON.parseObject(responseJson);
 
-                    String audioBase64 = jsonResponse.getString("audio_base64");
+            log.info("语音合成成功，Base64长度: {}", audioBase64.length());
 
-                    log.info("语音合成成功，Base64长度: {}", audioBase64.length());
+            return TextToSpeechVO.builder()
+                    .audioBase64(audioBase64)
+                    .build();
 
-                    return TextToSpeechVO.builder()
-                            .audioBase64(audioBase64)
-                            .build();
-                }
-            } else {
-                // 读取错误信息
-                String errorMsg = "";
-                try (InputStream es = connection.getErrorStream()) {
-                    if (es != null) {
-                        ByteArrayOutputStream baos = new ByteArrayOutputStream();
-                        byte[] buffer = new byte[1024];
-                        int bytesRead;
-                        while ((bytesRead = es.read(buffer)) != -1) {
-                            baos.write(buffer, 0, bytesRead);
-                        }
-                        errorMsg = baos.toString(StandardCharsets.UTF_8);
-                    }
-                }
-                log.error("ElevenLabs TTS API 调用失败, 状态码: {}, 错误信息: {}", responseCode, errorMsg);
-                throw new BusinessException(ErrorCode.SYSTEM_ERROR, "语音合成服务异常: " + responseCode);
-            }
-
-        } catch (BusinessException e) {
-            throw e;
         } catch (Exception e) {
             log.error("调用 ElevenLabs TTS API 发生异常", e);
             throw new BusinessException(ErrorCode.SYSTEM_ERROR, "语音合成服务异常: " + e.getMessage());
-        } finally {
-            if (connection != null) {
-                connection.disconnect();
-            }
         }
     }
 
-    /**
-     * 构建 ElevenLabs TTS API 请求 URL（带时间戳）
-     */
     private String buildRequestUrl(String voiceId) {
-        StringBuilder url = new StringBuilder(elevenLabsProperties.getBaseUrl());
+        return elevenLabsProperties.getBaseUrl() +
-        url.append("/text-to-speech/").append(voiceId).append("/with-timestamps");
+                "/text-to-speech/" + voiceId + "/with-timestamps" +
-        url.append("?output_format=").append(elevenLabsProperties.getOutputFormat());
+                "?output_format=" + elevenLabsProperties.getOutputFormat();
-        return url.toString();
     }
 
-    /**
-     * 构建请求体
-     */
     private Map<String, Object> buildRequestBody(String text) {
         Map<String, Object> requestBody = new HashMap<>();
         requestBody.put("text", text);
         requestBody.put("model_id", elevenLabsProperties.getModelId());
 
-        // 设置语音参数
         Map<String, Object> voiceSettings = new HashMap<>();
         voiceSettings.put("stability", elevenLabsProperties.getStability());
         voiceSettings.put("similarity_boost", elevenLabsProperties.getSimilarityBoost());