大家好，我是java1234_小锋老师，分享一套基于LangChain4j的RAG医疗健康知识智能问答系统(SpringBoot4+Vue3+Ollama) 。
项目简介
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: pan.baidu.com/s/185YGwaNf... 提取码: 1234
相关截图
核心代码
java
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();
}
}
js
<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>