node连接mysql写搜索的接口
时间: 2024-02-25 13:57:18 浏览: 63
在Node.js中,使用mysql2库连接MySQL数据库,实现搜索接口需要考虑到以下几个方面:
1. 客户端请求的参数:搜索接口需要接收客户端传来的关键字、页码、每页数量等参数。
2. 数据库查询:根据客户端请求的关键字,在数据库中查询匹配的数据。
3. 分页处理:将查询结果进行分页处理,返回给客户端。
下面是一个简单的搜索接口示例,基于Express框架和mysql2库:
```javascript
const express = require('express');
const router = express.Router();
const mysql = require('mysql2/promise');
router.get('/search', async (req, res) => {
const { keyword, page = 1, pageSize = 10 } = req.query;
const skip = (page - 1) * pageSize;
const limit = parseInt(pageSize);
try {
const connection = await mysql.createConnection({
host: 'localhost',
user: 'root',
password: 'password',
database: 'database'
});
const countSql = `SELECT COUNT(*) AS count FROM products WHERE name LIKE ?`;
const [countRows] = await connection.execute(countSql, [`%${keyword}%`]);
const count = countRows[0].count;
const sql = `SELECT * FROM products WHERE name LIKE ? LIMIT ?, ?`;
const [rows] = await connection.execute(sql, [`%${keyword}%`, skip, limit]);
connection.end();
res.json({
total: count,
page,
pageSize,
results: rows
});
} catch (err) {
console.error(err);
res.status(500).send('Server Error');
}
});
module.exports = router;
```
上述示例中,我们首先从请求参数中获取关键字、页码和每页数量,然后使用mysql2提供的execute方法来查询匹配的数据。在查询结果中,我们使用LIMIT方法来进行分页处理。最后,将结果封装为JSON格式返回给客户端。
需要注意的是,在实际应用中,还需要进行一些安全性、性能和用户体验方面的优化,例如设置搜索超时、关键字过滤、结果缓存等。同时,为了提高查询效率,还可以对数据库中的字段添加索引。
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