ADD file via upload

db.js

@@ -0,0 +1,24 @@
+const mysql = require('mysql2/promise');
+
+// 创建连接池
+const pool = mysql.createPool({
+  host: 'localhost',  // 数据库地址
+  user: 'root',       // 数据库用户名
+  password: '20041025',  // 数据库密码
+  database: 'class_k' ,// 使用的数据库
+  waitForConnections: true,
+  connectionLimit: 10,
+  queueLimit: 0
+});
+
+// 测试数据库连接
+pool.getConnection((err, connection) => {
+  if (err) {
+      console.error('Error connecting to the database:', err);
+  } else {
+      console.log('Database connected successfully!');
+      connection.release(); // 释放连接
+  }
+});
+
+module.exports = pool;