EXPRESS的router对象使用实例讲解

router对象：

1.充当子路由

var express = require("express");
var app = express();
var router = express.Router();
router.get('/test',function(req,res,next){
	res.send('test')
});
app.use('/user/:name',router);
app.listen(3000);

当访问https://localhost:3000/user/jack/test时，页面显示test

router.get('/test',function(req,res,next){
	res.send('test')
});//是一个子路由，相对于/user/:name,这是因为app.use('/user/:name',router);

var express = require("express");
var app = express();
var router = express.Router();
router.get('/test',function(req,res,next){
	res.send(req.params.name)
});
app.use('/user/:name',router);

app.listen(3000);

当访问https://localhost:3000/user/jack/test时，页面没有内容，这是因为父级路由没有合并到子级路由，

var router = express.Router({

mergeParams:true

});父级路由合并到子级路由

var express = require("express");
var app = express();
var router = express.Router({
	mergeParams:true
});
router.get('/test',function(req,res,next){
	res.send(req.params.name)
});
app.use('/user/:name',router);

app.listen(3000);

当访问https://localhost:3000/user/jack/test时，页面显示jack

当访问https://localhost:3000/user/jack/Test时，页面显示jack

test中字母的大小写没有区分，若要区分子路由中的大小写

2.路径大小写:

var express = require("express");
var app = express();
var router = express.Router({
	mergeParams:true,
	caseSensitive:true
});
router.get('/test',function(req,res,next){
	res.send('test')
});
router.get('/Test',function(req,res,next){
	res.send('Test')
});
app.use('/user/:name',router);

app.listen(3000);

访问https://localhost:3000/user/jack/Test 页面显示Test

访问https://localhost:3000/user/jack/test 页面显示test

3.严格路径：

var express = require("express");
var app = express();
var router = express.Router({
	
});
router.get('/test',function(req,res,next){
	res.send('test')
});
app.use('/user/:name',router);
app.listen(3000);

https://localhost:3000/user/jack/test

https://localhost:3000/user/jack/test/

访问上面的两个网址结果相同，若要区分上面的两个网址，就要使用

var router = express.Router({
strict:true

});

二.

var router = express.Router({
  mergeParams:true,
  caseSensitive:true,
  strict:true	
});//只是针对router对象下的路径

app下的路由如果要设置，则

app.set('strict routing',true);
app.set('case sensitive',true);