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大家好，我是Java1234_小锋老师，分享一套锋哥原创的基于LangChain4j的RAG医疗健康知识智能问答系统(SpringBoot4+Vue3+Ollama)

项目介绍

随着人工智能与大语言模型技术的快速发展，智能问答系统在医疗健康领域展现出广阔的应用前景。然而，通用大语言模型在回答医疗健康类问题时，普遍存在知识更新滞后、易产生“幻觉”以及缺乏可信来源等问题，难以直接应用于对准确性要求较高的医疗健康咨询场景。检索增强生成（Retrieval-Augmented Generation，RAG）技术通过将外部知识库检索与大语言模型生成相结合，能够在不重新训练模型的前提下显著提升回答的准确性与可追溯性，为构建可信的医疗健康知识问答系统提供了有效途径。
本文设计并实现了一个基于LangChain4j的RAG医疗健康知识智能问答系统。系统后端采用Spring Boot 4框架，以LangChain4j作为RAG应用编排框架，通过Ollama在本地部署qwen3对话模型与qwen3-embedding嵌入模型，使用Redis向量数据库存储文档向量并完成相似度检索，业务数据持久化采用MySQL与MyBatis-Plus，并通过Spring Security与JWT实现无状态的认证授权。前端采用Vue3、Element Plus与ECharts构建用户问答界面与管理后台。系统实现了知识库文档的上传、解析、分块、向量化入库，以及基于语义检索与提示词工程的智能问答、引用来源展示、问答历史管理、用户管理、分类管理和数据统计可视化等功能。
测试结果表明，本系统能够基于本地医疗健康知识库返回准确、可溯源的答案，有效缓解了大语言模型的幻觉问题，系统运行稳定、交互友好，达到了预期的设计目标，具有一定的实用价值与推广意义。

源码下载

链接：https://pan.baidu.com/s/185YGwaNf79jPVtScYxdPyA?pwd=1234
提取码：1234

系统展示

核心代码

package com.java1234.rag.controller; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.java1234.rag.common.Result; import com.java1234.rag.security.LoginUserContext; import com.java1234.rag.service.KnowledgeService; import com.java1234.rag.vo.KnowledgeDocVO; import lombok.RequiredArgsConstructor; import org.springframework.web.bind.annotation.*; import org.springframework.web.multipart.MultipartFile; /** * 知识库文档控制器 */ @RestController @RequiredArgsConstructor public class KnowledgeController { private final KnowledgeService knowledgeService; /** * 上传知识库文档(管理员) */ @PostMapping("/api/admin/knowledge/upload") public Result<KnowledgeDocVO> upload(@RequestParam("file") MultipartFile file, @RequestParam Long categoryId, @RequestParam(required = false) String title) { Long uploaderId = LoginUserContext.get().getUserId(); return Result.success(knowledgeService.upload(file, categoryId, title, uploaderId)); } /** * 分页查询文档 */ @GetMapping("/api/knowledge") public Result<Page<KnowledgeDocVO>> page(@RequestParam(defaultValue = "1") int page, @RequestParam(defaultValue = "10") int size, @RequestParam(required = false) Long categoryId, @RequestParam(required = false) String keyword) { return Result.success(knowledgeService.pageDocs(page, size, categoryId, keyword)); } /** * 删除文档(管理员) */ @DeleteMapping("/api/admin/knowledge/{id}") public Result<Void> delete(@PathVariable Long id) { knowledgeService.deleteDoc(id); return Result.success(); } }

<template> <div class="page-card"> <div class="search-bar"> <el-input v-model="keyword" placeholder="搜索分类名称" clearable style="width:240px" @keyup.enter="loadData" /> <el-button type="primary" @click="loadData">搜索</el-button> <el-button type="success" @click="openDialog()">新增分类</el-button> </div> <el-table :data="tableData" stripe border> <el-table-column prop="id" label="ID" min-width="80" /> <el-table-column prop="name" label="分类名称" min-width="140" /> <el-table-column prop="description" label="描述" min-width="200" show-overflow-tooltip /> <el-table-column prop="sort" label="排序" min-width="80" /> <el-table-column prop="status" label="状态" min-width="100"> <template #default="{ row }"> <el-tag :type="row.status === 1 ? 'success' : 'info'">{{ row.status === 1 ? '启用' : '禁用' }}</el-tag> </template> </el-table-column> <el-table-column prop="createTime" label="创建时间" min-width="180"> <template #default="{ row }">{{ formatDateTime(row.createTime) }}</template> </el-table-column> <el-table-column label="操作" min-width="160" fixed="right"> <template #default="{ row }"> <el-button type="primary" link @click="openDialog(row)">编辑</el-button> <el-popconfirm title="确定删除该分类？" @confirm="handleDelete(row.id)"> <template #reference><el-button type="danger" link>删除</el-button></template> </el-popconfirm> </template> </el-table-column> </el-table> <el-pagination class="pagination" v-model:current-page="page" v-model:page-size="size" :total="total" layout="total, prev, pager, next" @change="loadData" /> <el-dialog v-model="dialogVisible" :title="form.id ? '编辑分类' : '新增分类'" width="480px"> <el-form :model="form" label-width="80px"> <el-form-item label="名称"><el-input v-model="form.name" /></el-form-item> <el-form-item label="描述"><el-input v-model="form.description" type="textarea" :rows="3" /></el-form-item> <el-form-item label="排序"><el-input-number v-model="form.sort" :min="0" /></el-form-item> <el-form-item label="状态"> <el-select v-model="form.status"><el-option label="启用" :value="1" /><el-option label="禁用" :value="0" /></el-select> </el-form-item> </el-form> <template #footer> <el-button @click="dialogVisible = false">取消</el-button> <el-button type="primary" @click="handleSave">保存</el-button> </template> </el-dialog> </div> </template> <script setup> import { ref, reactive, onMounted } from 'vue' import { ElMessage } from 'element-plus' import { pageCategories, addCategory, updateCategory, deleteCategory } from '@/api/category' import { formatDateTime } from '@/utils/format' const keyword = ref('') const page = ref(1) const size = ref(10) const total = ref(0) const tableData = ref([]) const dialogVisible = ref(false) const form = reactive({ id: null, name: '', description: '', sort: 0, status: 1 }) const loadData = async () => { const res = await pageCategories({ page: page.value, size: size.value, keyword: keyword.value }) tableData.value = res.data.records total.value = res.data.total } const openDialog = (row) => { if (row) Object.assign(form, row) else Object.assign(form, { id: null, name: '', description: '', sort: 0, status: 1 }) dialogVisible.value = true } const handleSave = async () => { if (form.id) await updateCategory(form) else await addCategory(form) ElMessage.success('保存成功') dialogVisible.value = false loadData() } const handleDelete = async (id) => { await deleteCategory(id) ElMessage.success('删除成功') loadData() } onMounted(loadData) </script> <style scoped> .pagination { margin-top: 16px; justify-content: flex-end; } </style>