其实连接校园网不是个难题，就是传输一次post请求，之前也看到有大佬用python做到电脑上的自启动脚本。不过由于这次想做的是app，而app最好还是用java写，相比python会存在不少问题。
一、python脚本
虽然要弄java，但还是借着之前看到的python脚本先理解一下思路。首先在校园网登录的界面用F12观察一下连接的时候post了哪些参数：
可以看到主要有两个参数，DDDDD对应的是学号，形式是",0,学号和后缀"，后缀如果是@cmcc就是中国移动，如果是@njxy就是中国电信,如果无后缀则是校园网；而upass即是密码。所以我们要手动实现一次登录，只需要post这两个参数就行，代码如下:
import requests
url=""
data={"DDDDD": ",0,学号和后缀","upass": "密码"}
response=requests.post(url,data)
可以说是简单的不能再简单……不过我们的目标肯定不是一次登录，但是要是反复的post如果已经登录则也不太合理，参考大佬的脚本，发现有这样一个网址：""，ip后加上的是get""得到的v46ip的值，就能查看到是否连接(ok/fail)，如果连接还能看到自己的学号和连接的后缀，所以我们设置每隔一段时间的循环，先用get检查是否连接，未连接则post信息。代码如下：
import requests
import requests
import re
import time
def getIp():
url = ""
res = requests.get(url = url)
res.encoding = 'gbk'
results = re.search("v46ip=\'(【^\'】)\'", res.text)
ip=results.group(1)
return ip
def checkIp(ip):
url = "".format(ip)
res = requests.get(url = url)
status = re.search('\"result\":\"(【^\"】)\"', res.text).group(1)
if (status == 'ok'):
account = re.search('\"account\":\"(【^\"】)\"', res.text).group(1)
return account
else:
return False
def login():
url=""
data={"DDDDD": ",0,学号@cmcc","upass": "密码"} #修改学号和密码
response=requests.post(url,data)
return True
while True:
try:
ip = getIp()
if checkIp(ip) == False:
login()
except:
pass
time.sleep(5)
二、java脚本
可以说思路和python一样，但是我们需要找到这几个函数在java中的实现方法：requests.get、requests.post、re.search
1、re.search
用Pattern类来实现
private String re_search(String pa, String li) {
String line = li;
String pattern = pa;
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(line);
if (m.find()) {
return m.group(1);
} else {
return "null";
}
}
2、getpost
网上有很多脚本，这里我用的是java自带的HttpsURLConnection。
private final String USER_AGENT = "Mozilla/5.0";
private String sendGet(String Url) throws Exception {
String url = Url;
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("GET");
con.setRequestProperty("User-Agent", USER_AGENT);
int responseCode = con.getResponseCode();
System.out.println("\nSending 'GET' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
return response.toString();
}
private void sendPost(String Url) throws Exception {
String url = Url;
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
String urlParameters = "DDDDD=,0,学号@cmccupass=密码"; // 修改学号密码
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Post parameters : " + urlParameters);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
}
3、完整代码
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class HttpURLConnectionExample {
private final String USER_AGENT = "Mozilla/5.0";
public static void main(String【】 args) throws Exception {
HttpURLConnectionExample http = new HttpURLConnectionExample();
String ip, status, account = "";
int count = 0;
while (true) {
try {
Thread.sleep(5 1000);
ip = http.re_search("v46ip=\'(【^\'】)\'", http.sendGet(""));
ip = "" + ip;
status = http.re_search("\"result\":\"(【^\"】)\"", http.sendGet(ip));
if (status.equals("ok")) {
account = http.re_search("\"account\":\"(【^\"】*)\"", http.sendGet(ip));
} else {
http.sendPost("");
}
count++;
//代码效果参考：http://www.zidongmutanji.com/zsjx/14921.html
System.out.println(count);} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private String re_search(String pa, String li) {
String line = li;
String pattern = pa;
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(line);
if (m.find()) {
return m.group(1);
} else {
return "null";
}
}
private String sendGet(String Url) throws Exception {
String url = Url;
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("GET");
con.setRequestProperty("User-Agent", USER_AGENT);
int responseCode = con.getResponseCode();
System.out.println("//代码效果参考：http://www.zidongmutanji.com/zsjx/267625.html
\nSending 'GET' request to URL : " + url);System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
return response.toString();
}
private void sendPost(String Url) throws Exception {
String url = Url;
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
String urlParameters = "DDDDD=,0,学号@cmccupass=密码"; // 修改学号密码
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Post parameters : " + urlParameters);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
}
}
三、校园网自动登录app
然而当我用j
