【SpringAI实战】ChatPDF实现RAG知识库

一、前言

二、实现效果

三、代码实现

        3.1 后端代码

        3.2 前端代码

---

一、前言

Spring AI详解：【Spring AI详解】开启Java生态的智能应用开发新时代(附不同功能的Spring AI实战项目)-CSDN博客

二、实现效果

实现一个非常火爆的个人知识库AI应用，ChatPDF，原网站如下：

这个网站其实就是把你个人的PDF文件作为知识库，让AI基于PDF内容来回答你的问题，对于大学生、研究人员、专业人士来说，非常方便。

我们下面代码的实现效果：

三、代码实现

3.1 后端代码

pom.xml

    <!-- 继承Spring Boot父POM，提供默认依赖管理 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>3.4.3</version> <!-- Spring Boot版本 --><relativePath/> <!-- 优先从本地仓库查找 --></parent><!-- 自定义属性 --><properties><java.version>17</java.version> <!-- JDK版本要求 --><spring-ai.version>1.0.0-M6</spring-ai.version> <!-- Spring AI里程碑版本 --></properties><!-- 项目依赖 --><dependencies><!-- Spring Boot Web支持 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- AI相关依赖 --><dependency><groupId>org.springframework.ai</groupId><artifactId>spring-ai-ollama-spring-boot-starter</artifactId> <!-- Ollama集成 --></dependency><dependency><groupId>org.springframework.ai</groupId><artifactId>spring-ai-openai-spring-boot-starter</artifactId> <!-- OpenAI集成 --><dependency><groupId>org.springframework.ai</groupId><artifactId>spring-ai-pdf-document-reader</artifactId> <!-- PDF文档处理 --></dependency></dependency><!-- 开发工具 --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.22</version> <!-- 注解简化代码 --><scope>provided</scope> <!-- 编译期使用 --></dependency></dependencies><!-- 依赖管理（统一Spring AI家族版本） --><dependencyManagement><dependencies><dependency><groupId>org.springframework.ai</groupId><artifactId>spring-ai-bom</artifactId><version>${spring-ai.version}</version><type>pom</type><scope>import</scope> <!-- 导入BOM管理版本 --></dependency></dependencies></dependencyManagement>

application.ymal

可选择ollama或者openai其一进行大模型配置

server:tomcat:max-swallow-size: -1     # 禁用Tomcat的请求大小限制（或设为足够大的值，如100MB）spring:application:name: spring-ai-dome  # 应用名称（用于服务发现和监控）servlet:multipart:max-file-size: 50MB    # 单个文件限制max-request-size: 100MB # 单次请求总限制# AI服务配置（多引擎支持）ai:# Ollama配置（本地大模型引擎）ollama:base-url: http://localhost:11434  # Ollama服务地址（默认端口11434）chat:model: deepseek-r1:7b  # 使用的模型名称（7B参数的本地模型）# 阿里云OpenAI兼容模式配置openai:base-url: https://dashscope.aliyuncs.com/compatible-mode  # 阿里云兼容API端点api-key: ${OPENAI_API_KEY}  # 从环境变量读取API密钥（安全建议）chat:options:model: qwen-max-latest  # 通义千问最新版本模型embedding:options:model: text-embedding-v3dimensions: 1024# 日志级别配置
logging:level:org.springframework.ai: debug  # 打印Spring AI框架调试日志com.itheima.ai: debug         # 打印业务代码调试日志

CommonConfiguration 配置类 

import io.micrometer.observation.ObservationRegistry;
import org.springframework.ai.autoconfigure.openai.OpenAiChatProperties;
import org.springframework.ai.autoconfigure.openai.OpenAiConnectionProperties;
import org.springframework.ai.chat.client.ChatClient;
import org.springframework.ai.chat.client.advisor.MessageChatMemoryAdvisor;
import org.springframework.ai.chat.client.advisor.QuestionAnswerAdvisor;
import org.springframework.ai.chat.client.advisor.SimpleLoggerAdvisor;
import org.springframework.ai.chat.memory.ChatMemory;
import org.springframework.ai.chat.memory.InMemoryChatMemory;
import org.springframework.ai.chat.observation.ChatModelObservationConvention;
import org.springframework.ai.chat.prompt.ChatOptions;
import org.springframework.ai.model.SimpleApiKey;
import org.springframework.ai.model.tool.ToolCallingManager;
import org.springframework.ai.ollama.OllamaChatModel;
import org.springframework.ai.openai.OpenAiChatModel;
import org.springframework.ai.openai.OpenAiEmbeddingModel;
import org.springframework.ai.openai.api.OpenAiApi;
import org.springframework.ai.vectorstore.SearchRequest;
import org.springframework.ai.vectorstore.SimpleVectorStore;
import org.springframework.ai.vectorstore.VectorStore;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.retry.support.RetryTemplate;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.client.ResponseErrorHandler;
import org.springframework.web.client.RestClient;
import org.springframework.web.reactive.function.client.WebClient;
import java.util.*;/*** AI核心配置类** 核心组件：* 聊天记忆管理（ChatMemory）* 向量存储（VectorStore）*/
@Configuration
public class CommonConfiguration {/*** 内存式聊天记忆存储* @return InMemoryChatMemory 实例** 作用：保存对话上下文，实现多轮对话能力* 实现原理：基于ConcurrentHashMap的线程安全实现*/@Beanpublic ChatMemory chatMemory() {return new InMemoryChatMemory();}/*** 向量存储配置* @param embeddingModel 嵌入模型（用于文本向量化）* @return SimpleVectorStore 实例** 应用场景：* - 文档语义搜索* - PDF内容检索*/@Beanpublic VectorStore vectorStore(OpenAiEmbeddingModel embeddingModel) {return SimpleVectorStore.builder(embeddingModel).build();}/*** PDF文档问答客户端* @param model OpenAI模型* @param chatMemory 聊天记忆* @param vectorStore 向量存储* @return PDF专用ChatClient** 核心机制：* - 基于向量相似度检索（相似度阈值0.6，返回Top2结果）*/@Beanpublic ChatClient pdfChatClient(OpenAiChatModel model, ChatMemory chatMemory, VectorStore vectorStore) {return ChatClient.builder(model).defaultSystem("请根据上下文回答问题，遇到上下文没有的问题，不要随意编造。").defaultAdvisors(new SimpleLoggerAdvisor(),new MessageChatMemoryAdvisor(chatMemory),new QuestionAnswerAdvisor(  // 向量检索增强vectorStore,SearchRequest.builder().similarityThreshold(0.6)  // 相似度阈值.topK(2)  // 返回结果数.build())).build();}
}

ChatHistoryRepository 会话历史业务接口 

import java.util.List;public interface ChatHistoryRepository {/*** 保存会话记录* @param type 业务类型，如：chat、service、pdf* @param chatId 会话ID*/void save(String type, String chatId);/*** 获取会话ID列表* @param type 业务类型，如：chat、service、pdf* @return 会话ID列表*/List<String> getChatIds(String type);
}

InMemoryChatHistoryRepository 会话历史实现类

@Slf4j
@Component
@RequiredArgsConstructor
public class InMemoryChatHistoryRepository implements ChatHistoryRepository {// 会话chatId存储Mapprivate Map<String, List<String>> chatHistory;private final ChatMemory chatMemory;// 保存会话ID@Overridepublic void save(String type, String chatId) {/*if (!chatHistory.containsKey(type)) {chatHistory.put(type, new ArrayList<>());}List<String> chatIds = chatHistory.get(type);*/List<String> chatIds = chatHistory.computeIfAbsent(type, k -> new ArrayList<>());if (chatIds.contains(chatId)) {return;}chatIds.add(chatId);}// 获取所有会话id@Overridepublic List<String> getChatIds(String type) {/*List<String> chatIds = chatHistory.get(type);return chatIds == null ? List.of() : chatIds;*/return chatHistory.getOrDefault(type, List.of());}}

FileRepository PDF文件业务接口 

import org.springframework.core.io.Resource;public interface FileRepository {/*** 保存文件,还要记录chatId与文件的映射关系* @param chatId 会话id* @param resource 文件* @return 上传成功，返回true； 否则返回false*/boolean save(String chatId, Resource resource);/*** 根据chatId获取文件* @param chatId 会话id* @return 找到的文件*/Resource getFile(String chatId);
}

LocalPdfFileRepository 文件存储实现类

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.ai.vectorstore.SimpleVectorStore;
import org.springframework.ai.vectorstore.VectorStore;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.time.LocalDateTime;
import java.util.Objects;
import java.util.Properties;/*** 本地PDF文件存储仓库实现类* 功能：* 1. PDF文件的本地存储管理* 2. 会话与文件的映射关系维护* 3. 向量存储的持久化与恢复** 设计特点：* - 使用Properties文件维护会话ID与文件名的映射* - 实现VectorStore的自动加载/保存* - 支持文件资源的本地存储*/
@Slf4j
@Component
@RequiredArgsConstructor
public class LocalPdfFileRepository implements FileRepository {// 向量存储接口（实际使用SimpleVectorStore实现）private final VectorStore vectorStore;// 维护会话ID与PDF文件名的映射关系// Key: 会话ID, Value: PDF文件名private final Properties chatFiles = new Properties();/*** 保存文件到本地并记录映射关系* @param chatId 会话ID* @param resource PDF文件资源* @return 是否保存成功*/@Overridepublic boolean save(String chatId, Resource resource) {// 1. 保存文件到本地磁盘String filename = resource.getFilename();File target = new File(Objects.requireNonNull(filename));// 避免重复保存已存在的文件if (!target.exists()) {try {Files.copy(resource.getInputStream(), target.toPath());} catch (IOException e) {log.error("PDF文件保存失败", e);return false;}}// 2. 记录会话与文件的映射关系chatFiles.put(chatId, filename);return true;}/*** 根据会话ID获取文件资源* @param chatId 会话ID* @return 对应的PDF文件资源*/@Overridepublic Resource getFile(String chatId) {return new FileSystemResource(chatFiles.getProperty(chatId));}/*** 初始化方法 - 在Bean创建后自动执行* 功能：* 1. 加载历史会话文件映射* 2. 恢复向量存储数据*/@PostConstructprivate void init() {// 1. 加载会话-文件映射关系FileSystemResource pdfResource = new FileSystemResource("chat-pdf.properties");if (pdfResource.exists()) {try (BufferedReader reader = new BufferedReader(new InputStreamReader(pdfResource.getInputStream(), StandardCharsets.UTF_8))) {chatFiles.load(reader);} catch (IOException e) {throw new RuntimeException("会话映射关系加载失败", e);}}// 2. 加载向量存储数据FileSystemResource vectorResource = new FileSystemResource("chat-pdf.json");if (vectorResource.exists()) {SimpleVectorStore simpleVectorStore = (SimpleVectorStore) vectorStore;simpleVectorStore.load(vectorResource);}}/*** 销毁方法 - 在Bean销毁前自动执行* 功能：* 1. 持久化会话-文件映射关系* 2. 保存向量存储数据*/@PreDestroyprivate void persistent() {try {// 1. 保存会话-文件映射关系chatFiles.store(new FileWriter("chat-pdf.properties"),"Last updated: " + LocalDateTime.now());// 2. 保存向量存储SimpleVectorStore simpleVectorStore = (SimpleVectorStore) vectorStore;simpleVectorStore.save(new File("chat-pdf.json"));} catch (IOException e) {throw new RuntimeException("持久化数据失败", e);}}
}

PdfController 控制器接口类

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.ai.chat.client.ChatClient;
import org.springframework.ai.chat.client.advisor.QuestionAnswerAdvisor;
import org.springframework.ai.document.Document;
import org.springframework.ai.reader.ExtractedTextFormatter;
import org.springframework.ai.reader.pdf.PagePdfDocumentReader;
import org.springframework.ai.reader.pdf.config.PdfDocumentReaderConfig;
import org.springframework.ai.vectorstore.VectorStore;
import org.springframework.core.io.Resource;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import reactor.core.publisher.Flux;import java.io.IOException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Objects;import static org.springframework.ai.chat.client.advisor.AbstractChatMemoryAdvisor.CHAT_MEMORY_CONVERSATION_ID_KEY;
import static org.springframework.ai.chat.client.advisor.QuestionAnswerAdvisor.FILTER_EXPRESSION;@Slf4j
@RequiredArgsConstructor
@RestController
@RequestMapping("/ai/pdf")
public class PdfController {private final FileRepository fileRepository;private final VectorStore vectorStore;private final ChatClient pdfChatClient;private final ChatHistoryRepository chatHistoryRepository;@RequestMapping(value = "/chat", produces = "text/html;charset=utf-8")public Flux<String> chat(String prompt, String chatId) {// 1.找到会话文件Resource file = fileRepository.getFile(chatId);if (!file.exists()) {// 文件不存在，不回答throw new RuntimeException("会话文件不存在！");}// 2.保存会话idchatHistoryRepository.save("pdf", chatId);// 3.请求模型return pdfChatClient.prompt().user(prompt).advisors(a -> a.param(CHAT_MEMORY_CONVERSATION_ID_KEY, chatId)).advisors(a -> a.param(FILTER_EXPRESSION, "file_name == '" + file.getFilename() + "'")) // 在向量库检索时只处理当前会话的文件.stream().content();}/*** 文件上传*/@RequestMapping("/upload/{chatId}")public Result uploadPdf(@PathVariable String chatId, @RequestParam("file") MultipartFile file) {try {// 1. 校验文件是否为PDF格式if (!Objects.equals(file.getContentType(), "application/pdf")) {return Result.fail("只能上传PDF文件！");}// 2.保存文件boolean success = fileRepository.save(chatId, file.getResource());if (!success) {return Result.fail("保存文件失败！");}// 3.写入向量库this.writeToVectorStore(file.getResource());return Result.ok();} catch (Exception e) {log.error("Failed to upload PDF.", e);return Result.fail("上传文件失败！");}}/*** 文件下载*/@GetMapping("/file/{chatId}")public ResponseEntity<Resource> download(@PathVariable("chatId") String chatId) throws IOException {// 1.读取文件Resource resource = fileRepository.getFile(chatId);if (!resource.exists()) {return ResponseEntity.notFound().build();}// 2.文件名编码，写入响应头String filename = URLEncoder.encode(Objects.requireNonNull(resource.getFilename()), StandardCharsets.UTF_8);// 3.返回文件return ResponseEntity.ok().contentType(MediaType.APPLICATION_OCTET_STREAM).header("Content-Disposition", "attachment; filename=\"" + filename + "\"").body(resource);}private void writeToVectorStore(Resource resource) {// 1.创建PDF的读取器PagePdfDocumentReader reader = new PagePdfDocumentReader(resource, // 文件源PdfDocumentReaderConfig.builder().withPageExtractedTextFormatter(ExtractedTextFormatter.defaults()).withPagesPerDocument(1) // 每1页PDF作为一个Document.build());// 2.读取PDF文档，拆分为DocumentList<Document> documents = reader.read();// 3.写入向量库vectorStore.add(documents);}
}

3.2 前端代码

可以根据这些代码与接口让Cursor生成一个上传pdf的AI问答页面，或者根据下列Vue项目代码修改实现(实现效果中的代码) 

ChatPDF.vue

<template><div class="ai-chat" :class="{ 'dark': isDark }"><div class="chat-container"><div class="sidebar"><div class="history-header"><h2>聊天记录</h2><button class="new-chat" @click="startNewChat"><PlusIcon class="icon" />新对话</button></div><div class="history-list"><div v-for="chat in chatHistory" :key="chat.id"class="history-item":class="{ 'active': currentChatId === chat.id }"@click="loadChat(chat.id)"><ChatBubbleLeftRightIcon class="icon" /><span class="title">{{ chat.title || '新对话' }}</span></div></div></div><div class="chat-main"><div class="messages" ref="messagesRef"><ChatMessagev-for="(message, index) in currentMessages":key="index":message="message":is-stream="isStreaming && index === currentMessages.length - 1"/></div><div class="input-area"><div v-if="selectedFiles.length > 0" class="selected-files"><div v-for="(file, index) in selectedFiles" :key="index" class="file-item"><div class="file-info"><DocumentIcon class="icon" /><span class="file-name">{{ file.name }}</span><span class="file-size">({{ formatFileSize(file.size) }})</span></div><button class="remove-btn" @click="removeFile(index)"><XMarkIcon class="icon" /></button></div></div><div class="input-row"><div class="file-upload"><input type="file" ref="fileInput"@change="handleFileUpload"accept="image/*,audio/*,video/*"multipleclass="hidden"><button class="upload-btn"@click="triggerFileInput":disabled="isStreaming"><PaperClipIcon class="icon" /></button></div><textareav-model="userInput"@keydown.enter.prevent="sendMessage":placeholder="getPlaceholder()"rows="1"ref="inputRef"></textarea><button class="send-button" @click="sendMessage":disabled="isStreaming || (!userInput.trim() && !selectedFiles.length)"><PaperAirplaneIcon class="icon" /></button></div></div></div></div></div>
</template><script setup>
import { ref, onMounted, nextTick } from 'vue'
import { useDark } from '@vueuse/core'
import { ChatBubbleLeftRightIcon, PaperAirplaneIcon,PlusIcon,PaperClipIcon,DocumentIcon,XMarkIcon
} from '@heroicons/vue/24/outline'
import ChatMessage from '../components/ChatMessage.vue'
import { chatAPI } from '../services/api'const isDark = useDark()
const messagesRef = ref(null)
const inputRef = ref(null)
const userInput = ref('')
const isStreaming = ref(false)
const currentChatId = ref(null)
const currentMessages = ref([])
const chatHistory = ref([])
const fileInput = ref(null)
const selectedFiles = ref([])// 自动调整输入框高度
const adjustTextareaHeight = () => {const textarea = inputRef.valueif (textarea) {textarea.style.height = 'auto'textarea.style.height = textarea.scrollHeight + 'px'}else{textarea.style.height = '50px'}
}// 滚动到底部
const scrollToBottom = async () => {await nextTick()if (messagesRef.value) {messagesRef.value.scrollTop = messagesRef.value.scrollHeight}
}// 文件类型限制
const FILE_LIMITS = {image: { maxSize: 10 * 1024 * 1024,  // 单个文件 10MBmaxFiles: 3,                 // 最多 3 个文件description: '图片文件'},audio: { maxSize: 10 * 1024 * 1024,  // 单个文件 10MBmaxDuration: 180,           // 3分钟maxFiles: 3,                // 最多 3 个文件description: '音频文件'},video: { maxSize: 150 * 1024 * 1024, // 单个文件 150MBmaxDuration: 40,            // 40秒maxFiles: 3,                // 最多 3 个文件description: '视频文件'}
}// 触发文件选择
const triggerFileInput = () => {fileInput.value?.click()
}// 检查文件是否符合要求
const validateFile = async (file) => {const type = file.type.split('/')[0]const limit = FILE_LIMITS[type]if (!limit) {return { valid: false, error: '不支持的文件类型' }}if (file.size > limit.maxSize) {return { valid: false, error: `文件大小不能超过${limit.maxSize / 1024 / 1024}MB` }}if ((type === 'audio' || type === 'video') && limit.maxDuration) {try {const duration = await getMediaDuration(file)if (duration > limit.maxDuration) {return { valid: false, error: `${type === 'audio' ? '音频' : '视频'}时长不能超过${limit.maxDuration}秒`}}} catch (error) {return { valid: false, error: '无法读取媒体文件时长' }}}return { valid: true }
}// 获取媒体文件时长
const getMediaDuration = (file) => {return new Promise((resolve, reject) => {const element = file.type.startsWith('audio/') ? new Audio() : document.createElement('video')element.preload = 'metadata'element.onloadedmetadata = () => {resolve(element.duration)URL.revokeObjectURL(element.src)}element.onerror = () => {reject(new Error('无法读取媒体文件'))URL.revokeObjectURL(element.src)}element.src = URL.createObjectURL(file)})
}// 修改文件上传处理函数
const handleFileUpload = async (event) => {const files = Array.from(event.target.files || [])if (!files.length) return// 检查所有文件类型是否一致const firstFileType = files[0].type.split('/')[0]const hasInconsistentType = files.some(file => file.type.split('/')[0] !== firstFileType)if (hasInconsistentType) {alert('请选择相同类型的文件（图片、音频或视频）')event.target.value = ''return}// 验证所有文件for (const file of files) {const { valid, error } = await validateFile(file)if (!valid) {alert(error)event.target.value = ''selectedFiles.value = []return}}// 检查文件总大小const totalSize = files.reduce((sum, file) => sum + file.size, 0)const limit = FILE_LIMITS[firstFileType]if (totalSize > limit.maxSize * 3) { // 允许最多3个文件的总大小alert(`${firstFileType === 'image' ? '图片' : firstFileType === 'audio' ? '音频' : '视频'}文件总大小不能超过${(limit.maxSize * 3) / 1024 / 1024}MB`)event.target.value = ''selectedFiles.value = []return}selectedFiles.value = files
}// 修改文件输入提示
const getPlaceholder = () => {if (selectedFiles.value.length > 0) {const type = selectedFiles.value[0].type.split('/')[0]const desc = FILE_LIMITS[type].descriptionreturn `已选择 ${selectedFiles.value.length} 个${desc}，可继续输入消息...`}return '输入消息，可上传图片、音频或视频...'
}// 修改发送消息函数
const sendMessage = async () => {if (isStreaming.value) returnif (!userInput.value.trim() && !selectedFiles.value.length) returnconst messageContent = userInput.value.trim()// 添加用户消息const userMessage = {role: 'user',content: messageContent,timestamp: new Date()}currentMessages.value.push(userMessage)// 清空输入userInput.value = ''adjustTextareaHeight()await scrollToBottom()// 准备发送数据const formData = new FormData()if (messageContent) {formData.append('prompt', messageContent)}selectedFiles.value.forEach(file => {formData.append('files', file)})// 添加助手消息占位const assistantMessage = {role: 'assistant',content: '',timestamp: new Date()}currentMessages.value.push(assistantMessage)isStreaming.value = truetry {const reader = await chatAPI.sendMessage(formData, currentChatId.value)const decoder = new TextDecoder('utf-8')let accumulatedContent = ''  // 添加累积内容变量while (true) {try {const { value, done } = await reader.read()if (done) break// 累积新内容accumulatedContent += decoder.decode(value)  // 追加新内容await nextTick(() => {// 更新消息，使用累积的内容const updatedMessage = {...assistantMessage,content: accumulatedContent  // 使用累积的内容}const lastIndex = currentMessages.value.length - 1currentMessages.value.splice(lastIndex, 1, updatedMessage)})await scrollToBottom()} catch (readError) {console.error('读取流错误:', readError)break}}} catch (error) {console.error('发送消息失败:', error)assistantMessage.content = '抱歉，发生了错误，请稍后重试。'} finally {isStreaming.value = falseselectedFiles.value = [] // 清空已选文件fileInput.value.value = '' // 清空文件输入await scrollToBottom()}
}// 加载特定对话
const loadChat = async (chatId) => {currentChatId.value = chatIdtry {const messages = await chatAPI.getChatMessages(chatId, 'chat')currentMessages.value = messages} catch (error) {console.error('加载对话消息失败:', error)currentMessages.value = []}
}// 加载聊天历史
const loadChatHistory = async () => {try {const history = await chatAPI.getChatHistory('chat')chatHistory.value = history || []if (history && history.length > 0) {await loadChat(history[0].id)} else {startNewChat()}} catch (error) {console.error('加载聊天历史失败:', error)chatHistory.value = []startNewChat()}
}// 开始新对话
const startNewChat = () => {const newChatId = Date.now().toString()currentChatId.value = newChatIdcurrentMessages.value = []// 添加新对话到聊天历史列表const newChat = {id: newChatId,title: `对话 ${newChatId.slice(-6)}`}chatHistory.value = [newChat, ...chatHistory.value] // 将新对话添加到列表开头
}// 格式化文件大小
const formatFileSize = (bytes) => {if (bytes < 1024) return bytes + ' B'if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB'return (bytes / (1024 * 1024)).toFixed(1) + ' MB'
}// 移除文件
const removeFile = (index) => {selectedFiles.value = selectedFiles.value.filter((_, i) => i !== index)if (selectedFiles.value.length === 0) {fileInput.value.value = ''  // 清空文件输入}
}onMounted(() => {loadChatHistory()adjustTextareaHeight()
})
</script><style scoped lang="scss">
.ai-chat {position: fixed;  // 修改为固定定位top: 64px;       // 导航栏高度left: 0;right: 0;bottom: 0;display: flex;background: var(--bg-color);overflow: hidden; // 防止页面滚动.chat-container {flex: 1;display: flex;max-width: 1800px;width: 100%;margin: 0 auto;padding: 1.5rem 2rem;gap: 1.5rem;height: 100%;    // 确保容器占满高度overflow: hidden; // 防止容器滚动}.sidebar {width: 300px;display: flex;flex-direction: column;background: rgba(255, 255, 255, 0.95);backdrop-filter: blur(10px);border-radius: 1rem;box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);.history-header {flex-shrink: 0;  // 防止头部压缩padding: 1rem;display: flex;justify-content: space-between;align-items: center;h2 {font-size: 1.25rem;}.new-chat {display: flex;align-items: center;gap: 0.5rem;padding: 0.5rem 1rem;border-radius: 0.5rem;background: #007CF0;color: white;border: none;cursor: pointer;transition: background-color 0.3s;&:hover {background: #0066cc;}.icon {width: 1.25rem;height: 1.25rem;}}}.history-list {flex: 1;overflow-y: auto;  // 允许历史记录滚动padding: 0 1rem 1rem;.history-item {display: flex;align-items: center;gap: 0.5rem;padding: 0.75rem;border-radius: 0.5rem;cursor: pointer;transition: background-color 0.3s;&:hover {background: rgba(255, 255, 255, 0.1);}&.active {background: rgba(0, 124, 240, 0.1);}.icon {width: 1.25rem;height: 1.25rem;}.title {flex: 1;overflow: hidden;text-overflow: ellipsis;white-space: nowrap;}}}}.chat-main {flex: 1;display: flex;flex-direction: column;background: rgba(255, 255, 255, 0.95);backdrop-filter: blur(10px);border-radius: 1rem;box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);overflow: hidden;  // 防止内容溢出.messages {flex: 1;overflow-y: auto;  // 只允许消息区域滚动padding: 2rem;}.input-area {flex-shrink: 0;padding: 1.5rem 2rem;background: rgba(255, 255, 255, 0.98);border-top: 1px solid rgba(0, 0, 0, 0.05);display: flex;flex-direction: column;gap: 1rem;.selected-files {background: rgba(0, 0, 0, 0.02);border-radius: 0.75rem;padding: 0.75rem;border: 1px solid rgba(0, 0, 0, 0.05);.file-item {display: flex;align-items: center;justify-content: space-between;padding: 0.75rem;background: #fff;border-radius: 0.5rem;margin-bottom: 0.75rem;border: 1px solid rgba(0, 0, 0, 0.05);transition: all 0.2s ease;&:last-child {margin-bottom: 0;}&:hover {background: rgba(0, 124, 240, 0.02);border-color: rgba(0, 124, 240, 0.2);}.file-info {display: flex;align-items: center;gap: 0.75rem;.icon {width: 1.5rem;height: 1.5rem;color: #007CF0;}.file-name {font-size: 0.875rem;color: #333;font-weight: 500;}.file-size {font-size: 0.75rem;color: #666;background: rgba(0, 0, 0, 0.05);padding: 0.25rem 0.5rem;border-radius: 1rem;}}.remove-btn {padding: 0.375rem;border: none;background: rgba(0, 0, 0, 0.05);color: #666;cursor: pointer;border-radius: 0.375rem;transition: all 0.2s ease;&:hover {background: #ff4d4f;color: #fff;}.icon {width: 1.25rem;height: 1.25rem;}}}}.input-row {display: flex;gap: 1rem;align-items: flex-end;background: #fff;padding: 0.75rem;border-radius: 1rem;border: 1px solid rgba(0, 0, 0, 0.1);box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);.file-upload {.hidden {display: none;}.upload-btn {width: 2.5rem;height: 2.5rem;display: flex;align-items: center;justify-content: center;border: none;border-radius: 0.75rem;background: rgba(0, 124, 240, 0.1);color: #007CF0;cursor: pointer;transition: all 0.2s ease;&:hover:not(:disabled) {background: rgba(0, 124, 240, 0.2);}&:disabled {opacity: 0.5;cursor: not-allowed;}.icon {width: 1.25rem;height: 1.25rem;}}}textarea {flex: 1;resize: none;border: none;background: transparent;padding: 0.75rem;color: inherit;font-family: inherit;font-size: 1rem;line-height: 1.5;max-height: 150px;&:focus {outline: none;}&::placeholder {color: #999;}}.send-button {width: 2.5rem;height: 2.5rem;display: flex;align-items: center;justify-content: center;border: none;border-radius: 0.75rem;background: #007CF0;color: white;cursor: pointer;transition: all 0.2s ease;&:hover:not(:disabled) {background: #0066cc;transform: translateY(-1px);}&:disabled {background: #ccc;cursor: not-allowed;}.icon {width: 1.25rem;height: 1.25rem;}}}}}
}.dark {.sidebar {background: rgba(40, 40, 40, 0.95);box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);}.chat-main {background: rgba(40, 40, 40, 0.95);box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);.input-area {background: rgba(30, 30, 30, 0.98);border-top: 1px solid rgba(255, 255, 255, 0.05);.selected-files {background: rgba(255, 255, 255, 0.02);border-color: rgba(255, 255, 255, 0.05);.file-item {background: rgba(255, 255, 255, 0.02);border-color: rgba(255, 255, 255, 0.05);&:hover {background: rgba(0, 124, 240, 0.1);border-color: rgba(0, 124, 240, 0.3);}.file-info {.icon {color: #007CF0;}.file-name {color: #fff;}.file-size {color: #999;background: rgba(255, 255, 255, 0.1);}}.remove-btn {background: rgba(255, 255, 255, 0.1);color: #999;&:hover {background: #ff4d4f;color: #fff;}}}}.input-row {background: rgba(255, 255, 255, 0.02);border-color: rgba(255, 255, 255, 0.05);box-shadow: none;textarea {color: #fff;&::placeholder {color: #666;}}.file-upload .upload-btn {background: rgba(0, 124, 240, 0.2);color: #007CF0;&:hover:not(:disabled) {background: rgba(0, 124, 240, 0.3);}}}}}.history-item {&:hover {background: rgba(255, 255, 255, 0.05) !important;}&.active {background: rgba(0, 124, 240, 0.2) !important;}}textarea {background: rgba(255, 255, 255, 0.05) !important;&:focus {background: rgba(255, 255, 255, 0.1) !important;}}.input-area {.file-upload {.upload-btn {background: rgba(255, 255, 255, 0.1);color: #999;&:hover:not(:disabled) {background: rgba(255, 255, 255, 0.2);color: #fff;}}}}
}@media (max-width: 768px) {.ai-chat {.chat-container {padding: 0;}.sidebar {display: none; // 在移动端隐藏侧边栏}.chat-main {border-radius: 0;}}
}
</style> 

 ChatMessage.vue 

<template><div class="message" :class="{ 'message-user': isUser }"><div class="avatar"><UserCircleIcon v-if="isUser" class="icon" /><ComputerDesktopIcon v-else class="icon" :class="{ 'assistant': !isUser }" /></div><div class="content"><div class="text-container"><button v-if="isUser" class="user-copy-button" @click="copyContent" :title="copyButtonTitle"><DocumentDuplicateIcon v-if="!copied" class="copy-icon" /><CheckIcon v-else class="copy-icon copied" /></button><div class="text" ref="contentRef" v-if="isUser">{{ message.content }}</div><div class="text markdown-content" ref="contentRef" v-else v-html="processedContent"></div></div><div class="message-footer" v-if="!isUser"><button class="copy-button" @click="copyContent" :title="copyButtonTitle"><DocumentDuplicateIcon v-if="!copied" class="copy-icon" /><CheckIcon v-else class="copy-icon copied" /></button></div></div></div>
</template><script setup>
import { computed, onMounted, nextTick, ref, watch } from 'vue'
import { marked } from 'marked'
import DOMPurify from 'dompurify'
import { UserCircleIcon, ComputerDesktopIcon, DocumentDuplicateIcon, CheckIcon } from '@heroicons/vue/24/outline'
import hljs from 'highlight.js'
import 'highlight.js/styles/github-dark.css'const contentRef = ref(null)
const copied = ref(false)
const copyButtonTitle = computed(() => copied.value ? '已复制' : '复制内容')// 配置 marked
marked.setOptions({breaks: true,gfm: true,sanitize: false
})// 处理内容
const processContent = (content) => {if (!content) return ''// 分析内容中的 think 标签let result = ''let isInThinkBlock = falselet currentBlock = ''// 逐字符分析，处理 think 标签for (let i = 0; i < content.length; i++) {if (content.slice(i, i + 7) === '<think>') {isInThinkBlock = trueif (currentBlock) {// 将之前的普通内容转换为 HTMLresult += marked.parse(currentBlock)}currentBlock = ''i += 6 // 跳过 <think>continue}if (content.slice(i, i + 8) === '</think>') {isInThinkBlock = false// 将 think 块包装在特殊 div 中result += `<div class="think-block">${marked.parse(currentBlock)}</div>`currentBlock = ''i += 7 // 跳过 </think>continue}currentBlock += content[i]}// 处理剩余内容if (currentBlock) {if (isInThinkBlock) {result += `<div class="think-block">${marked.parse(currentBlock)}</div>`} else {result += marked.parse(currentBlock)}}// 净化处理后的 HTMLconst cleanHtml = DOMPurify.sanitize(result, {ADD_TAGS: ['think', 'code', 'pre', 'span'],ADD_ATTR: ['class', 'language']})// 在净化后的 HTML 中查找代码块并添加复制按钮const tempDiv = document.createElement('div')tempDiv.innerHTML = cleanHtml// 查找所有代码块const preElements = tempDiv.querySelectorAll('pre')preElements.forEach(pre => {const code = pre.querySelector('code')if (code) {// 创建包装器const wrapper = document.createElement('div')wrapper.className = 'code-block-wrapper'// 添加复制按钮const copyBtn = document.createElement('button')copyBtn.className = 'code-copy-button'copyBtn.title = '复制代码'copyBtn.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" class="code-copy-icon" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" /></svg>`// 添加成功消息const successMsg = document.createElement('div')successMsg.className = 'copy-success-message'successMsg.textContent = '已复制!'// 组装结构wrapper.appendChild(copyBtn)wrapper.appendChild(pre.cloneNode(true))wrapper.appendChild(successMsg)// 替换原始的 pre 元素pre.parentNode.replaceChild(wrapper, pre)}})return tempDiv.innerHTML
}// 修改计算属性
const processedContent = computed(() => {if (!props.message.content) return ''return processContent(props.message.content)
})// 为代码块添加复制功能
const setupCodeBlockCopyButtons = () => {if (!contentRef.value) return;const codeBlocks = contentRef.value.querySelectorAll('.code-block-wrapper');codeBlocks.forEach(block => {const copyButton = block.querySelector('.code-copy-button');const codeElement = block.querySelector('code');const successMessage = block.querySelector('.copy-success-message');if (copyButton && codeElement) {// 移除旧的事件监听器const newCopyButton = copyButton.cloneNode(true);copyButton.parentNode.replaceChild(newCopyButton, copyButton);// 添加新的事件监听器newCopyButton.addEventListener('click', async (e) => {e.preventDefault();e.stopPropagation();try {const code = codeElement.textContent || '';await navigator.clipboard.writeText(code);// 显示成功消息if (successMessage) {successMessage.classList.add('visible');setTimeout(() => {successMessage.classList.remove('visible');}, 2000);}} catch (err) {console.error('复制代码失败:', err);}});}});
}// 在内容更新后手动应用高亮和设置复制按钮
const highlightCode = async () => {await nextTick()if (contentRef.value) {contentRef.value.querySelectorAll('pre code').forEach((block) => {hljs.highlightElement(block)})// 设置代码块复制按钮setupCodeBlockCopyButtons()}
}const props = defineProps({message: {type: Object,required: true}
})const isUser = computed(() => props.message.role === 'user')// 复制内容到剪贴板
const copyContent = async () => {try {// 获取纯文本内容let textToCopy = props.message.content;// 如果是AI回复，需要去除HTML标签if (!isUser.value && contentRef.value) {// 创建临时元素来获取纯文本const tempDiv = document.createElement('div');tempDiv.innerHTML = processedContent.value;textToCopy = tempDiv.textContent || tempDiv.innerText || '';}await navigator.clipboard.writeText(textToCopy);copied.value = true;// 3秒后重置复制状态setTimeout(() => {copied.value = false;}, 3000);} catch (err) {console.error('复制失败:', err);}
}// 监听内容变化
watch(() => props.message.content, () => {if (!isUser.value) {highlightCode()}
})// 初始化时也执行一次
onMounted(() => {if (!isUser.value) {highlightCode()}
})const formatTime = (timestamp) => {if (!timestamp) return ''return new Date(timestamp).toLocaleTimeString()
}
</script><style scoped lang="scss">
.message {display: flex;margin-bottom: 1.5rem;gap: 1rem;&.message-user {flex-direction: row-reverse;.content {align-items: flex-end;.text-container {position: relative;.text {background: #f0f7ff; // 浅色背景color: #333;border-radius: 1rem 1rem 0 1rem;}.user-copy-button {position: absolute;left: -30px;top: 50%;transform: translateY(-50%);background: transparent;border: none;width: 24px;height: 24px;display: flex;align-items: center;justify-content: center;cursor: pointer;opacity: 0;transition: opacity 0.2s;.copy-icon {width: 16px;height: 16px;color: #666;&.copied {color: #4ade80;}}}&:hover .user-copy-button {opacity: 1;}}.message-footer {flex-direction: row-reverse;}}}.avatar {width: 40px;height: 40px;flex-shrink: 0;.icon {width: 100%;height: 100%;color: #666;padding: 4px;border-radius: 8px;transition: all 0.3s ease;&.assistant {color: #333;background: #f0f0f0;&:hover {background: #e0e0e0;transform: scale(1.05);}}}}.content {display: flex;flex-direction: column;gap: 0.25rem;max-width: 80%;.text-container {position: relative;}.message-footer {display: flex;align-items: center;margin-top: 0.25rem;.time {font-size: 0.75rem;color: #666;}.copy-button {display: flex;align-items: center;gap: 0.25rem;background: transparent;border: none;font-size: 0.75rem;color: #666;padding: 0.25rem 0.5rem;border-radius: 4px;cursor: pointer;margin-right: auto;transition: background-color 0.2s;&:hover {background-color: rgba(0, 0, 0, 0.05);}.copy-icon {width: 14px;height: 14px;&.copied {color: #4ade80;}}.copy-text {font-size: 0.75rem;}}}.text {padding: 1rem;border-radius: 1rem 1rem 1rem 0;line-height: 1.5;white-space: pre-wrap;color: var(--text-color);.cursor {animation: blink 1s infinite;}:deep(.think-block) {position: relative;padding: 0.75rem 1rem 0.75rem 1.5rem;margin: 0.5rem 0;color: #666;font-style: italic;border-left: 4px solid #ddd;background-color: rgba(0, 0, 0, 0.03);border-radius: 0 0.5rem 0.5rem 0;// 添加平滑过渡效果opacity: 1;transform: translateX(0);transition: opacity 0.3s ease, transform 0.3s ease;&::before {content: '思考';position: absolute;top: -0.75rem;left: 1rem;padding: 0 0.5rem;font-size: 0.75rem;background: #f5f5f5;border-radius: 0.25rem;color: #999;font-style: normal;}// 添加进入动画&:not(:first-child) {animation: slideIn 0.3s ease forwards;}}:deep(pre) {background: #f6f8fa;padding: 1rem;border-radius: 0.5rem;overflow-x: auto;margin: 0.5rem 0;border: 1px solid #e1e4e8;code {background: transparent;padding: 0;font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;font-size: 0.9rem;line-height: 1.5;tab-size: 2;}}:deep(.hljs) {color: #24292e;background: transparent;}:deep(.hljs-keyword) {color: #d73a49;}:deep(.hljs-built_in) {color: #005cc5;}:deep(.hljs-type) {color: #6f42c1;}:deep(.hljs-literal) {color: #005cc5;}:deep(.hljs-number) {color: #005cc5;}:deep(.hljs-regexp) {color: #032f62;}:deep(.hljs-string) {color: #032f62;}:deep(.hljs-subst) {color: #24292e;}:deep(.hljs-symbol) {color: #e36209;}:deep(.hljs-class) {color: #6f42c1;}:deep(.hljs-function) {color: #6f42c1;}:deep(.hljs-title) {color: #6f42c1;}:deep(.hljs-params) {color: #24292e;}:deep(.hljs-comment) {color: #6a737d;}:deep(.hljs-doctag) {color: #d73a49;}:deep(.hljs-meta) {color: #6a737d;}:deep(.hljs-section) {color: #005cc5;}:deep(.hljs-name) {color: #22863a;}:deep(.hljs-attribute) {color: #005cc5;}:deep(.hljs-variable) {color: #e36209;}}}
}@keyframes blink {0%,100% {opacity: 1;}50% {opacity: 0;}
}@keyframes slideIn {from {opacity: 0;transform: translateX(-10px);}to {opacity: 1;transform: translateX(0);}
}.dark {.message {.avatar .icon {&.assistant {color: #fff;background: #444;&:hover {background: #555;}}}&.message-user {.content .text-container {.text {background: #1a365d; // 暗色模式下的浅蓝色背景color: #fff;}.user-copy-button {.copy-icon {color: #999;&.copied {color: #4ade80;}}}}}.content {.message-footer {.time {color: #999;}.copy-button {color: #999;&:hover {background-color: rgba(255, 255, 255, 0.1);}}}.text {:deep(.think-block) {background-color: rgba(255, 255, 255, 0.03);border-left-color: #666;color: #999;&::before {background: #2a2a2a;color: #888;}}:deep(pre) {background: #161b22;border-color: #30363d;code {color: #c9d1d9;}}:deep(.hljs) {color: #c9d1d9;background: transparent;}:deep(.hljs-keyword) {color: #ff7b72;}:deep(.hljs-built_in) {color: #79c0ff;}:deep(.hljs-type) {color: #ff7b72;}:deep(.hljs-literal) {color: #79c0ff;}:deep(.hljs-number) {color: #79c0ff;}:deep(.hljs-regexp) {color: #a5d6ff;}:deep(.hljs-string) {color: #a5d6ff;}:deep(.hljs-subst) {color: #c9d1d9;}:deep(.hljs-symbol) {color: #ffa657;}:deep(.hljs-class) {color: #f2cc60;}:deep(.hljs-function) {color: #d2a8ff;}:deep(.hljs-title) {color: #d2a8ff;}:deep(.hljs-params) {color: #c9d1d9;}:deep(.hljs-comment) {color: #8b949e;}:deep(.hljs-doctag) {color: #ff7b72;}:deep(.hljs-meta) {color: #8b949e;}:deep(.hljs-section) {color: #79c0ff;}:deep(.hljs-name) {color: #7ee787;}:deep(.hljs-attribute) {color: #79c0ff;}:deep(.hljs-variable) {color: #ffa657;}}&.message-user .content .text {background: #0066cc;color: white;}}}
}.markdown-content {:deep(p) {margin: 0.5rem 0;&:first-child {margin-top: 0;}&:last-child {margin-bottom: 0;}}:deep(ul),:deep(ol) {margin: 0.5rem 0;padding-left: 1.5rem;}:deep(li) {margin: 0.25rem 0;}:deep(code) {background: rgba(0, 0, 0, 0.05);padding: 0.2em 0.4em;border-radius: 3px;font-size: 0.9em;font-family: ui-monospace, monospace;}:deep(pre code) {background: transparent;padding: 0;}:deep(table) {border-collapse: collapse;margin: 0.5rem 0;width: 100%;}:deep(th),:deep(td) {border: 1px solid #ddd;padding: 0.5rem;text-align: left;}:deep(th) {background: rgba(0, 0, 0, 0.05);}:deep(blockquote) {margin: 0.5rem 0;padding-left: 1rem;border-left: 4px solid #ddd;color: #666;}:deep(.code-block-wrapper) {position: relative;margin: 1rem 0;border-radius: 6px;overflow: hidden;.code-copy-button {position: absolute;top: 0.5rem;right: 0.5rem;background: rgba(255, 255, 255, 0.1);border: none;color: #e6e6e6;cursor: pointer;padding: 0.25rem;border-radius: 4px;display: flex;align-items: center;justify-content: center;opacity: 0;transition: opacity 0.2s, background-color 0.2s;z-index: 10;&:hover {background-color: rgba(255, 255, 255, 0.2);}.code-copy-icon {width: 16px;height: 16px;}}&:hover .code-copy-button {opacity: 0.8;}pre {margin: 0;padding: 1rem;background: #1e1e1e;overflow-x: auto;code {background: transparent;padding: 0;font-family: ui-monospace, monospace;}}.copy-success-message {position: absolute;top: 0.5rem;right: 0.5rem;background: rgba(74, 222, 128, 0.9);color: white;padding: 0.25rem 0.5rem;border-radius: 4px;font-size: 0.75rem;opacity: 0;transform: translateY(-10px);transition: opacity 0.3s, transform 0.3s;pointer-events: none;z-index: 20;&.visible {opacity: 1;transform: translateY(0);}}}
}.dark {.markdown-content {:deep(.code-block-wrapper) {.code-copy-button {background: rgba(255, 255, 255, 0.05);&:hover {background-color: rgba(255, 255, 255, 0.1);}}pre {background: #0d0d0d;}}:deep(code) {background: rgba(255, 255, 255, 0.1);}:deep(th),:deep(td) {border-color: #444;}:deep(th) {background: rgba(255, 255, 255, 0.1);}:deep(blockquote) {border-left-color: #444;color: #999;}}
}
</style>

PDFViewer.vue

<template><div class="pdf-view"><div class="pdf-header"><DocumentTextIcon class="icon" /><span class="filename">{{ fileName }}</span></div><div class="pdf-content"><div v-if="isLoading" class="pdf-loading"><div class="loading-spinner"></div><p class="loading-text">正在加载 PDF...</p></div><div class="pdf-container" ref="viewerRef"></div></div></div>
</template><script setup>
import { ref, watch, onMounted, onUnmounted, computed } from 'vue'
import { DocumentTextIcon } from '@heroicons/vue/24/outline'
import { useDark } from '@vueuse/core'const isDark = useDark()
const props = defineProps({file: {type: [File, null],default: null},fileName: {type: String,default: ''}
})const isLoading = ref(false)
const viewerRef = ref(null)
let instance = null// 使用简单的 PDF.js 实现
onMounted(async () => {if (viewerRef.value && props.file) {try {isLoading.value = true// 创建 iframe 元素const iframe = document.createElement('iframe')iframe.style.width = '100%'iframe.style.height = '100%'iframe.style.border = 'none'// 创建 Blob URLconst url = URL.createObjectURL(props.file)iframe.src = url// 清空容器并添加 iframeviewerRef.value.innerHTML = ''viewerRef.value.appendChild(iframe)// 监听 iframe 加载完成iframe.onload = () => {isLoading.value = false}// 保存 URL 以便清理instance = { url }} catch (error) {console.error('PDF 查看器初始化失败:', error)isLoading.value = false}}
})// 创建 iframe 并设置主题
const createIframe = (file) => {const iframe = document.createElement('iframe')iframe.style.width = '100%'iframe.style.height = '100%'iframe.style.border = 'none'// 创建 Blob URLconst url = URL.createObjectURL(file)// 根据当前主题设置 iframe 的背景色if (isDark.value) {iframe.style.backgroundColor = '#1a1a1a'} else {iframe.style.backgroundColor = '#ffffff'}iframe.src = urlreturn { iframe, url }
}// 监听文件变化
watch(() => props.file, (newFile) => {if (newFile) {// 重新挂载组件if (instance?.url) {URL.revokeObjectURL(instance.url)}try {isLoading.value = trueconst { iframe, url } = createIframe(newFile)// 清空容器并添加 iframeif (viewerRef.value) {viewerRef.value.innerHTML = ''viewerRef.value.appendChild(iframe)}// 监听 iframe 加载完成iframe.onload = () => {isLoading.value = false}// 保存 URL 以便清理instance = { url, iframe }} catch (error) {console.error('加载 PDF 失败:', error)isLoading.value = false}}
})// 监听主题变化
watch(() => isDark.value, (newIsDark) => {if (instance?.iframe) {if (newIsDark) {instance.iframe.style.backgroundColor = '#1a1a1a'} else {instance.iframe.style.backgroundColor = '#ffffff'}}
})onUnmounted(() => {if (instance?.url) {URL.revokeObjectURL(instance.url)}
})
</script><style scoped lang="scss">
.pdf-view {flex: 1;display: flex;flex-direction: column;border-right: 1px solid rgba(0, 0, 0, 0.1);background: #fff;.pdf-header {padding: 1rem;display: flex;align-items: center;gap: 1rem;border-bottom: 1px solid rgba(0, 0, 0, 0.1);background: rgba(255, 255, 255, 0.98);z-index: 1;.icon {width: 1.5rem;height: 1.5rem;color: #666;}.filename {flex: 1;font-weight: 500;overflow: hidden;text-overflow: ellipsis;white-space: nowrap;}}.pdf-content {flex: 1;position: relative;overflow: hidden;.pdf-container {width: 100%;height: 100%;}.pdf-loading {position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);display: flex;flex-direction: column;align-items: center;gap: 1rem;background: rgba(255, 255, 255, 0.9);padding: 2rem;border-radius: 1rem;box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);z-index: 2;.loading-spinner {width: 48px;height: 48px;border: 4px solid rgba(0, 124, 240, 0.1);border-left-color: #007CF0;border-radius: 50%;animation: spin 1s linear infinite;}.loading-text {color: #666;font-size: 1rem;font-weight: 500;}}}
}// 暗色模式支持
.dark {.pdf-view {background: #1a1a1a;border-right-color: rgba(255, 255, 255, 0.1);.pdf-header {background: rgba(30, 30, 30, 0.98);border-bottom-color: rgba(255, 255, 255, 0.1);.icon {color: #999;}.filename {color: #fff;}}.pdf-content {background: #0d0d0d;.pdf-loading {background: rgba(30, 30, 30, 0.9);.loading-spinner {border-color: rgba(0, 124, 240, 0.2);border-left-color: #007CF0;}.loading-text {color: #999;}}}}
}@keyframes spin {0% { transform: rotate(0deg); }100% { transform: rotate(360deg); }
}
</style> 

api.js 接口调用js

const BASE_URL = 'http://localhost:8080'export const chatAPI = {// 发送 PDF 问答消息async sendPdfMessage(prompt, chatId) {try {const response = await fetch(`${BASE_URL}/ai/pdf/chat?prompt=${encodeURIComponent(prompt)}&chatId=${chatId}`, {method: 'GET',// 确保使用流式响应signal: AbortSignal.timeout(30000) // 30秒超时})if (!response.ok) {throw new Error(`API error: ${response.status}`)}// 返回可读流return response.body.getReader()} catch (error) {console.error('API Error:', error)throw error}}
}

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