nodeJs实现基于连接池连接mysql的方法示例

//连接数据库
var mysql = require('mysql');
var pool = mysql.createPool({
  host: 'localhost',
  user: 'root',
  password: 'gfdfsdf34r34r',
  database:'caiji'
});
module.exports = function(sql, callback) {
  pool.getConnection(function(conn_err, conn) {
    if(conn_err) {
      callback(err,null,null);
    } else {
      conn.query(sql, function(query_err, rows, fields) {
        conn.release();
        callback(query_err, rows, fields);
      });
    }
  });
};

var query = require("./mysql.js");
query(sql, function(err, rows, fields) {
  console.log(rows);
});