node mysql limit,nodejs mysql 实现分页的方法

这两天学习了nodejs mysql 实现分页，很重要，所以，今天添加一点小笔记。

代码如下

var express = require('express');

var router = express.Router();

var settings = require('../settings.js');

var mysql = require('mysql2');

router.get('/', function(req, res, next) {

var current_page = 1; //默认为1

var num = 9; //一页条数

if (req.query.page) {

current_page = parseInt(req.query.page);

}

var last_page = current_page - 1;

if (current_page <= 1) {

last_page = 1;

}

var next_page = current_page + 1;

var str = 'SELECT left(paragraph,50) as paragraph,date,id FROM notice limit ' + num + ' offset ' + num * (current_page - 1);

var conn = mysql.createConnection(settings.db);

conn.connect();

conn.query(str, function(err, rows, fields) {

if (err) {

req.flash('error', '数据查询有误');

}

if (!err) {

if (!rows[0]) {

req.flash('error', '已到最后一页,请返回');

}

res.render('notice', {

last_page: last_page,

next_page: next_page,

current_page: current_page,

mes: rows,

error: req.flash('error').toString()

});

}

});

conn.end();

});

module.exports = router;

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持聚米学院。