first commit

历届学生/苏琪/项目练习/jiakao/service/db/index.js

@@ -0,0 +1,17 @@
+var mysql = require('mysql');
+var config = require("../config");
+class db {
+ constructor() {
+   this.connection = mysql.createConnection(config.Mysql);
+   this.connection.connect();
+ }
+
+ get (sql,params = [],callback) {
+   this.connection.query(sql, params , function (error, results, fields) {
+    callback(results)
+  });
+ }
+
+}
+
+module.exports = new db()