up

src/Houduan/index.js

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+const express = require('express');
+const app = express();
+const mysql = require('mysql');
+
+function dj(){
+
+}
+// 创建连接对象
+const connection = mysql.createConnection({
+  host: 'localhost', // 数据库服务器地址
+  user: 'root', // 数据库用户名
+  password: 'CYH123456', // 数据库密码
+  database: 'cyh1' // 要连接的数据库名
+});
+ 
+// 开启连接
+connection.connect();
+
+var asd=' ';
+// 执行查询
+connection.query('Select * from 药品;', (error, results, fields) => {
+  if (error) throw error;
+  // 处理查询结果
+  asd = results;
+  console.log(results);
+});
+ 
+// 关闭连接
+connection.end();
+
+app.use((req, res, next) => {
+  res.setHeader('Access-Control-Allow-Origin', 'http://127.0.0.1:5500'); // 替换为您的前端应用域名
+  res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
+  res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');
+  res.setHeader('Access-Control-Allow-Credentials', true);
+  next();
+});
+
+app.get('/', (req, res) => {
+
+  res.send(asd);
+
+  console.log("hello")
+});
+ 
+
+const PORT = 3000;
+app.listen(PORT, () => {
+  console.log(`Server is running on port ${PORT}`);
+});
+