请教个express问题

代码如下，html文件变成文本输出了，有什么办法解决

var express = require('express'), http = require("http"), app = module.exports = express();

app.engine('.html', require('ejs').__express);

app.set('views', __dirname + '/views'); app.use(express.directory(__dirname + '/views')) app.use(express.static(__dirname + '/views'));

app.set('view engine', 'html'); var sever = http.createServer(app);