express+mysql对async的封装

//DBConfig.js
const mysql = require('mysql')
const pool = mysql.createPool({
    host: '127.0.0.1',
    user: 'root',
    password: 'admin', 
    database: 'nodetest',
    port: 3306
})
let query = function( sql, values ) {
  return new Promise(( resolve, reject ) => {
    pool.getConnection(function(err, connection) {
      if (err) {
        reject( err )
      } else {
        connection.query(sql, values, ( err, rows) => {
          if ( err ) {
            reject( err )
          } else {
            resolve( rows )
          }
          connection.release()
        })
      }
    })
  })
}

module.exports =  query

使用：

//用户登录
router.post('/login', async (req, res) => {
    var param = req.body;
    var user_name = param.user_name;
    var password = param.password;
    var _res = res;
    var data = {};
    var userInfos = [];
    const logins = await query(userSQL.queryAll)
      var LFlag = false;
      var md5Value=utility.md5(password);
      if(logins){
        for (let i=0;i<logins.length;i++) {
            if(logins[i].user_name == user_name && logins[i].password == md5Value) {
              LFlag = true;
              userInfos[i] = logins[i];
            }else if(logins[i].user_name == user_name && logins[i].password != password){
              LFlag = false;
            }
        }
      }
      data.data = {};
      if(LFlag == true) {
          for(let i of userInfos){
            data.data = i;
          }
          data.status = 0;
          data.msg = "登陆成功"
      }else{
          data.status = -1;
          data.msg = "用户名或密码错误";
      }
      responseJSON(_res, data);
});

//只在本地运行，服务器测试通过再补充