1.py

import urllib.request
import urllib.parse
import http.cookiejar


url = 'http://jwxt.xidian.edu.cn/gradeLnAllAction.do?type=ln&oper=qbinfo&lnxndm=2015-2016%D1%A7%C4%EA%B5%DA%D2%BB%D1%A7%C6%DA(%C1%BD%D1%A7%C6%DA)'
postdata = urllib.parse.urlencode ({
	       'username' : '14030130108',
	       'password' : '124657'
									}).encode('utf-8')   
req = urllib.request.Request(url,postdata)
req.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36')
cjar = http.cookiejar.CookieJar()
opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cjar))
urllib.request.install_opener(opener)
file = opener.open(req)
data = file.read()
file = open('C:/Users/wangcongchao/Desktop/Pythonspider/爬取西电相关/a.html','wb')
file.write(data)
file.close()

url2 = 'http://jwxt.xidian.edu.cn/caslogin.jsp'
data2 = urllib.request.urlopen(url2).read()
fh2 = open('C:/Users/wangcongchao/Desktop/Pythonspider/爬取西电相关/b.html','wb')
fh2.write(data2)
fh2.close()