throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))

  ^

at Function.use (I:\Develop\blog2\node_modules\express\lib\router\index.js:458:13)

at Function. (I:\Develop\blog2\node_modules\express\lib\application.js:220:21)

at Array.forEach ()

at Function.use (I:\Develop\blog2\node_modules\express\lib\application.js:217:7)

at Object. (I:\Develop\blog2\app.js:22:5)

at Module._compile (module.js:635:30)

at Object.Module._extensions..js (module.js:646:10)

at Module.load (module.js:554:32)

at tryModuleLoad (module.js:497:12)

at Function.Module._load (module.js:489:3)

var express = require("express");

var swig = require("swig");



var app = express();



app.use("/public",express.static(__dirname + "/public"));





app.engine("html",swig.renderFile);

app.set("views","./views");

app.set("view engine","html");

swig.setDefaults({cache:false});



//根据不同功能划分模块

app.use("/admin",require("./routers/admin"));

app.use("/api",require("./routers/api"));

app.use("/",require("./routers/main"));





app.get("/",function (req,res,next) {

//    res.send("

welcome

");

    /*



     */

    res.render("index");

})



app.listen(8081);