nodejs+mysql入门实例(链接到数据库)

//连接数据库
var mysql = require('mysql');
var connection = mysql.createConnection({
    host: '******', //数据库地址
    user: '******',   //数据库用户名
    password: '*****', //数据库管理密码
    database:'*******', //数据库名称
    insecureAuth: true  
});

connection.connect(

connection.connect(function(err) {
if (err) {
console.error('error connecting: ' + err.stack);
return;
}

console.log('connected as id ' + connection.threadId);
});

);
//查询
connection.query('SELECT 1 + 1 AS solution', function(err, rows, fields) {
    if (err) throw err;
    console.log('The solution is: ', rows[0].solution);
});
//关闭连接
connection.end();

　　

npm install mysql -save



mysql链接池的使用

var mysql = require('mysql');
var sqlConfig = require('../../lib/mysql');
var mySqlParams = {
    connectionLimit : sqlConfig.connectionLimit, //最大链接数 一般设置为 100
    host: sqlConfig.host, //数据库地址
    user: sqlConfig.user,   //数据库用户名
    password: sqlConfig.password, //数据库管理密码
    database:sqlConfig.database, //数据库名称
    insecureAuth: sqlConfig.insecureAuth
}
 

　　

var pool  = mysql.createPool(mySqlParams);
  
module.exports = function (operate,params = false) {
    var prom  = new Promise(function (resolve, reject) {
        pool.query(operate, params ,function(err, rows, fields) {
            if (err) {
                reject(err);
            }else{
                resolve(rows);
            }
        });
    }).then(function(res){
        console.log("数据库查询成功:" + operate + ";" +params);
        console.log(res);
          return Promise.resolve(res);
    }).catch(function(e){
        console.log("数据库查询失败:" +e.message+ operate + ";" +params);
        console.log(e);
       return Promise.reject(e);
    });
    return prom;
}

　　

sequelize 插件，方便操作mysql