first commit

backend/test-db.ts

@@ -0,0 +1,42 @@
+import mysql from 'mysql2/promise';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+async function testConnection() {
+  console.log('测试数据库连接...');
+  console.log('配置信息:');
+  console.log('  Host:', process.env.DB_HOST);
+  console.log('  Port:', process.env.DB_PORT);
+  console.log('  User:', process.env.DB_USER);
+  console.log('  Password:', process.env.DB_PASSWORD ? '***' : '(空)');
+  console.log('  Database:', process.env.DB_NAME);
+  
+  try {
+    const connection = await mysql.createConnection({
+      host: process.env.DB_HOST || 'localhost',
+      port: Number(process.env.DB_PORT) || 3306,
+      user: process.env.DB_USER || 'root',
+      password: process.env.DB_PASSWORD || '',
+      database: process.env.DB_NAME || 'employee_performance',
+    });
+    
+    console.log('\n✅ 数据库连接成功！');
+    
+    // 测试查询
+    const [rows] = await connection.query('SELECT COUNT(*) as count FROM user');
+    console.log('用户表记录数:', (rows as any)[0].count);
+    
+    await connection.end();
+    process.exit(0);
+  } catch (error: any) {
+    console.error('\n❌ 数据库连接失败:', error.message);
+    console.error('\n请检查:');
+    console.error('1. MySQL 服务是否正在运行');
+    console.error('2. 用户名和密码是否正确');
+    console.error('3. 数据库是否已创建');
+    process.exit(1);
+  }
+}
+
+testConnection();