1.用express4创建了个项目，其默认的“/”和“/users”路径能够访问，因此在其入口文件的基础上添加路径和路径文件，并创建相应的ejs模板，结果首页能够访问，并可以正常连接到样式文件，其他的路径则显示404.

|
---public
|
---routes
    |
    ---login.js(路由文件)
|
---view
    |
    ---login.ejs(模板文件)
|
---app.js（入口）

//app.js
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var index = require('./routes/index');
var login = require('./routes/login');
var register = require('./routes/register');
var logout = require('./routes/logout');
var post = require('./routes/post');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', index);
app.use('/login', login);
app.use('/register', register);
app.use('/logout', logout);
app.use('/post', post);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;

//路径文件之一（login.js）
var express = require('express');
var router = express.Router();

/* GET login listing and render page. */
router.get('/login', function(req, res, next) {
  res.render('login', { title: '登录' });
});

module.exports = router;

//模板文件之一（这块应该没问题，被引入的我就不贴了）（index.ejs）
<%- include header %>
主页
<%- include footer %>

请诸位大大解答。