var query = function (path,id,param,sqlWhere,res){
　　　　var aa = 111;
var sql = "select * from user";

        var mysql = dbHelper.getMysql();

        mysql.query({

          sql: sql

        }, function (err, rows) {

            res.end(JSON.stringify(rows));

            aa = rows;

        });
        return aa;//返回结果是111而不是rows

};

var query = function (path,id,param,sqlWhere,res){

    var promise = new Promise(function (resolve, reject) {

        var sql = getFileSql(path,id,param,sqlWhere);

        var mysql = dbHelper.getMysql();

        mysql.query({

          sql: sql

        }, function (err, rows) {

            res.end(JSON.stringify(rows));

            resolve(rows);//关键

        });    

    });

    promise.then(function (value) {

        console.log(value);

        return value;

    }, function (value) {});

    return promise;

};