关于mongoose连接mongodb重复访问报错的解决办法

var express = require('express');
var mongoose = require('mongoose');
var router = express.Router();
var Person = mongoose.model('Person',{
 id:Number,
 name:String
});
/新增/
router.get('/insert', function(req, res){
 var student = new Person({
  id:1,
  name:"huop"
 });
 mongoose.connect("mongodb://localhost:27017/test");
 student.save(function(e, product, numberAffected) {
  if (e) res.send(e.message);
  var html = "
新增的数据为" + JSON.stringify(product);
  html += "
影响的数据量为" + numberAffected;
  res.send(html);
 });
});
router.get('/find',function(request, response){
 mongoose.connect("mongodb://localhost:27017/test");
 Person.find({
  id: 1
 }, function(e, docs) {
  if (e) response.send(e.message);
  var html = "
 查询到的数据为" + JSON.stringify(docs);
  response.send(html);
 });
});

var mongoose = require(‘mongoose');
mongoose.connect(‘mongodb://localhost/nuaidibi');
module.exports = mongoose;