创建并连接数据库，并修改登录和注册接口

index.js

@@ -1,28 +1,92 @@
 const express = require('express')
+const db = require('./db/mysql')
 
 const app = express()
 
 // 解析 JSON 请求体
 app.use(express.json())
 
+app.get('/api/test-db', (req, res) => {
+  db.query('SELECT 1 + 1 AS result', (error, results) => {
+    if (error) {
+      console.error('数据库查询失败：', error)
+
+      return res.status(500).json({
+        code: 500,
+        message: '数据库查询失败'
+      })
+    }
+
+    res.json({
+      code: 200,
+      message: '数据库连接成功',
+      data: results
+    })
+  })
+})
+
 app.post('/api/login', (req, res) => {
     const { username, password } = req.body
-    if(username === 'admin' && password === '123456') {
-        res.json({ 
-            code: 200, 
-            message: '登录成功', 
-            data: {
-                token: 'this_is_a_mock_token',
-                username: 'admin'
-            }
+
+    const sql = `
+    SELECT * FROM chat_mysql.users
+    WHERE username = ? AND password = ?;
+  `
+    db.query(sql, [username, password], (error, results) => {
+      if (error) {
+        console.error('数据库查询失败：', error)
+
+        return res.status(500).json({
+            code: 500,
+            message: '登录失败'
         })
-    } else {
-        res.json({ 
-            code: 401, 
-            message: '用户名或密码错误',
-            data: null
+      }
+
+      if (results.length > 0) {
+        res.json({
+          code: 200,
+          message: '登录成功',
+          data: {
+            token: 'this_is_a_mock_token',
+            username: results[0].username
+          }
         })
+      } else {
+        res.json({
+          code: 401,
+          message: '用户名或密码错误',
+          data: null
+        })
+      }
+    })
+})
+
+app.post('/api/register', (req, res) => {
+  const { username, password } = req.body
+
+  const sql = `
+    INSERT INTO users (username, password)
+    VALUES (?, ?)
+  `
+
+  db.query(sql, [username, password], (error, result) => {
+    if (error) {
+      console.error(error)
+
+      return res.status(500).json({
+        code: 500,
+        message: '注册失败'
+      })
     }
+
+    res.json({
+      code: 200,
+      message: '注册成功',
+      data: {
+        id: result.insertId
+      }
+    })
+  })
 })
 
 app.listen(3000, () => {