NodeJs Mysql简易操作工具

/**
 * npm install mysql -save
 */
var mysql = require('mysql');

const conf = {
    host: 'localhost',
    user: 'root',
    password: '123456',
    database: 'test_db',
    charset: 'utf8mb4',
};

function XMysql() {
    /**
     * 批量插入
     * @sql insert into `user_tab`(`name`, `gender`, `age`, created`) values ?
     * @params [[name1, gender1, age1, created1],[name2, gender2, age2, created2],[name3, gender3, age3, created3]];
     */
    this.insert = function (sql, params) {
        return new Promise((resolve, reject) => {
            var connection = mysql.createConnection(conf);
            connection.connect();
            connection.query(sql, [params], function (error, results, fields) {
                connection.end();
                if (error) {
                    reject(error);
                } else {
                    resolve(results);
                }
            });
        });
    };

    /**
     * 更新
     * @sql update tab_tmp set tmp_field = ? where id = ?
     * @params [field, id]
     */
    this.update = function (sql, params) {
        return new Promise((resolve, reject) => {
            var connection = mysql.createConnection(conf);
            connection.connect();
            connection.query(sql, params, function (error, results, fields) {
                if (error) {
                    reject(error);
                } else {
                    resolve(results);
                }
            });
            connection.end();
        });
    };
    /**
     * 根据SQL进行查询
     * @sql select * from user_tab where id = 1
     */
    this.select = function (sql) {
        return new Promise((resolve, reject) => {
            var connection = mysql.createConnection(conf);
            connection.connect();
            connection.query(sql, function (error, results, fields) {
                if (error) {
                    reject(error);
                } else {
                    resolve(results);
                }
            });
            connection.end();
        });
    };
}
module.exports = new XMysql();

使用方式:

const xm = require('./xmysql');

xm.select("select * from user_tab where id = 1", res => {

       console.log(res);

});

这样就可以查询出来内容啦,还可以把数据库连接优化一下,做个连接池..但是我这里就随便写一下 做个小工具使用 因此没有这个需求...

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