简单的下路由(我们可以在控制器中看到路由参数)

var http = require("http");

var server = http.createServer(function(req,res){

    var userurl = req.url;

    res.writeHead(200,{"Content-Type":"text/html;charset=UTF-8"});

//substr函数来判断此时的开头

    if(userurl.substr(0,9)=="/student/"){

        var studentid = userurl.substr(9);

        console.log(studentid);

        if(/d{10}/.test(studentid)){

            res.end("你要查询学生信息，id为"+studentid);

        }else{

            res.end("你要查询学生信息学号位数不对");

        }

    }else if(userurl.substr(0,9)=="/teacher/"){

        var teacherid = userurl.substr(9);

        if(/d{6}/.test(teacherid )){

            res.end("你要查询老师信息，id为"+teacherid );

        }else{

            res.end("你要查询老师信息学号位数不对");

        }
    }


    });

server.listen(3000,"127.0.0.1");