JAVA模拟正方教务系统登陆

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• 准备工具:Chrome , IDEA , JDK1.8
• 步骤:

要实现同时发送用户名,密码,验证码发送到服务器,不可能一上来就发送,因为验证码一开始要从服务器获取,所以有以下思路:

1. 模拟打开主页
2. 模拟验证码刷新
3. 登陆

模拟打开主页后,验证码是在服务器端生成图片再返回给客户端,so,怎么才能得到它呢,将服务器返回的数据写到本地文件中,再手动打开该图片文件即可看到验证码

登陆:Post发送表单相关数据给服务器

通过Chrome抓包可以看到需要发送的数据有哪些:

图中的FormData就是表单中相关的数据

__VIEWSTATE:是.net语言生成的,听说每次登陆都不一样,那要怎么解决?一开始就进入了教务系统的主页,就可以从返回的html源码中通过正则表达式截取

/*** 通过正则得到viewstate** @param result html源码*/private static String getViewState(String result) {Pattern p = Pattern.compile("name=\"__VIEWSTATE\" value=\"(.*?)\"");Matcher m = p.matcher(result);while (m.find()) {result = m.group();}String viewState = result.substring(26, result.length() - 1);System.out.println(viewState);return viewState;}
txtUserName 是用户名
TextBox2 是密码
txtSecretCode 是验证码
其他字段我也不知道有什么用了,反正它们每次都不会变
通过上面的步骤已经把需要的数据都得到了,学号跟密码就不用再描述了
下面直接通过post方式登陆,将以上的数据存到一个NameValuePair[]中.
再用httpClient进行Post方式网络访问即可.
登陆成功后,判断返回的html源码,如果有欢迎两个字,就是登陆成功了,再选择相应功能,继续Get方式网络访问
本demo中实现的有
查看成绩,
查看课表,
查看等级考试成绩
其他功能均可以通过抓包查看请求的url实现.
源码如下:

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.springframework.http.HttpStatus;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** 步骤1:进入default2.aspx(Get)* 步骤2:得到__VIEWSTATE,模拟刷新验证码,将验证码保存到电脑* 步骤3:登陆(Post)* Created by CHG on 2016-11-02 14:05.*/
public class JavaPost {private static Scanner sc = new Scanner(System.in);private static String url_checkCode = "http://218.75.197.124:83/CheckCode.aspx?";private static String userName = "13408200240";private static String password = "this is a secret";private static String checkCode = "";private static String viewState = "";private static HttpClient client = new HttpClient();private static HttpUtils httpUtils = new HttpUtils();private static String urlReferer = "http://218.75.197.124:83/xs_main.aspx?xh=13408200240";public static void main(String[] args) {String result = getdefault2Page();viewState = getViewState(result);downloadCheckCode();System.out.print("e盘根目录查看验证码并输入控制台:");checkCode = sc.next();System.out.println("您输入的验证码为:" + checkCode);getMainPage();getxs_main_get();mainMenu();}/*** 功能主菜单*/private static void mainMenu() {System.out.println("---------------------------");System.out.print("查看成绩请输入1");System.out.println();System.out.print("查看课表请输入2");System.out.println();System.out.print("查看等级考试成绩请输入3");int i = sc.nextInt();switch (i) {case 1:  //查看课表getStudentCJ();mainMenu();break;case 2:  //查看课表getStudentKB();mainMenu();break;case 3:  //等级考试成绩查询getMainTestCJ();mainMenu();break;default:break;}}/*** 等级考试成绩查询*/private static void getMainTestCJ() {String url ="http://218.75.197.124:83/xsdjkscx.aspx?xh=13408200240";String result = httpUtils.getDataGet(client, url, urlReferer, false);saveAsHTML(result,"等级考试成绩");}/*** 查看课表*/private static void getStudentKB() {//http://218.75.197.124:83/xskbcx.aspx?xh=13408200240String url = "http://218.75.197.124:83/xskbcx.aspx?xh=13408200240";String result = httpUtils.getDataGet(client, url, urlReferer, true);saveAsHTML(result,"课表");}/*** 查看成绩*/private static void getStudentCJ() {String url = "http://218.75.197.124:83/xscjcx.aspx?xh=13408200240";String result = httpUtils.getDataGet(client, url, urlReferer, true);saveAsHTML(result,"成绩");}/*** 再次302跳转到主页*/private static void getxs_main_get() {String url = "http://218.75.197.124:83/xs_main.aspx?xh=13408200240";String result = httpUtils.getDataGet(client, url, urlReferer, false);if (result.contains("欢迎"))System.out.println("登陆成功");}/*** 封装好所有参数,post* 进入主页*/private static void getMainPage() {String url = "http://218.75.197.124:83/default2.aspx";NameValuePair[] nameValues = new NameValuePair[]{new NameValuePair("__VIEWSTATE", viewState),new NameValuePair("txtUserName", userName),new NameValuePair("TextBox2", password),new NameValuePair("txtSecretCode", checkCode),new NameValuePair("RadioButtonList1", "%D1%A7%C9%FA"),new NameValuePair("Button1", ""),new NameValuePair("lbLanguage", ""),new NameValuePair("hidPdrs", ""),new NameValuePair("hidsc", ""),};httpUtils.getDataPost(client, url, nameValues);}/*** 通过正则得到viewstate** @param result*/private static String getViewState(String result) {Pattern p = Pattern.compile("name=\"__VIEWSTATE\" value=\"(.*?)\"");Matcher m = p.matcher(result);while (m.find()) {result = m.group();}String viewState = result.substring(26, result.length() - 1);System.out.println(viewState);return viewState;}/*** 下载验证码and保存*/private static void downloadCheckCode() {new Thread() {@Overridepublic void run() {super.run();String url = "http://218.75.197.124:83/CheckCode.aspx?";InputStream is = null;OutputStream os = null;File file = new File("e:\\checkcode.png");try {os = new FileOutputStream(file);} catch (FileNotFoundException e) {e.printStackTrace();}GetMethod getMethod = new GetMethod(url);try {int status = client.executeMethod(getMethod);// 请求成功状态-200if (status == HttpStatus.OK.value()) {try {is = getMethod.getResponseBodyAsStream();byte[] b = new byte[1024];int length;while ((length = is.read(b)) != -1) {os.write(b, 0, length);}} catch (IOException e) {e.printStackTrace();}} else {System.out.println("请求返回状态：" + status);}} catch (IOException e) {e.printStackTrace();} finally {try {is.close();os.close();} catch (IOException e) {e.printStackTrace();}}}}.start();}/*** 步骤1:先进入default2.aspx页面** @return*/public static String getdefault2Page() {String url_default = "http://218.75.197.124:83/default2.aspx";String result = httpUtils.getDataGet(client, url_default, null, false);return result;}/*** 将返回的html源码保存到本地电脑  格式为xxx.html* @param result*/public static void saveAsHTML(String result,String fileName){String path = "e:\\"+fileName+".html";File htmlFile = new File(path);try{if (!htmlFile.exists()){htmlFile.createNewFile();}OutputStreamWriter write = new OutputStreamWriter(new FileOutputStream(htmlFile),"gbk");BufferedWriter writer=new BufferedWriter(write);writer.write(result);writer.close();System.out.println(fileName+"保存成功,路径:"+path);} catch (Exception e){e.printStackTrace();}}
}
网络访问封装为一个工具包,源码如下:
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.springframework.http.HttpStatus;import java.io.IOException;/*** Created by CHG on 2016-11-02 21:54.*/
public class HttpUtils {public  String getDataPost(HttpClient httpClient,String url, NameValuePair[] nameValuePairs) {// 响应内容String result = "";// 定义http客户端对象--httpClient
//		HttpClient httpClient = new HttpClient();// 定义并实例化客户端链接对象-postMethodPostMethod postMethod = new PostMethod(url);
//		postMethod.setRequestHeader("Referer", urlReferer);try {// 设置http的头postMethod.setRequestHeader("ContentType","application/x-www-form-urlencoded;charset=UTF-8");// 将表单的值放入postMethod中postMethod.setRequestBody(nameValuePairs);// 定义访问地址的链接状态int statusCode = 0;try {// 客户端请求url数据statusCode = httpClient.executeMethod(postMethod);} catch (Exception e) {e.printStackTrace();}// 请求成功状态-200if (statusCode == HttpStatus.OK.value()) {try {result = postMethod.getResponseBodyAsString();} catch (IOException e) {e.printStackTrace();}} else {System.out.println("请求返回状态：" + statusCode);result = postMethod.getResponseBodyAsString();}} catch (Exception e) {e.printStackTrace();} finally {// 释放链接postMethod.releaseConnection();httpClient.getHttpConnectionManager().closeIdleConnections(0);}System.out.println(result);return result;}/*** get请求获取数据* @param httpClient client* @param url 访问的连接地址* @param urlReferer 防止访问后服务器返回302* @param isPrint 是否将得到的html打印* @return*/public  String getDataGet(HttpClient httpClient,String url, String urlReferer ,boolean isPrint) {// 响应内容String result = "";// 定义并实例化客户端链接对象-getMethodGetMethod getMethod = new GetMethod(url);getMethod.setRequestHeader("Referer", urlReferer);//302跳转try {// 设置http的头getMethod.setRequestHeader("ContentType","application/x-www-form-urlencoded;charset=UTF-8");// 定义访问地址的链接状态int statusCode = 0;try {// 客户端请求url数据statusCode = httpClient.executeMethod(getMethod);} catch (Exception e) {e.printStackTrace();}// 请求成功状态-200if (statusCode == HttpStatus.OK.value()) {try {result = getMethod.getResponseBodyAsString();} catch (IOException e) {e.printStackTrace();}} else {System.out.println("请求返回状态：" + statusCode);result = getMethod.getResponseBodyAsString();}} catch (Exception e) {e.printStackTrace();} finally {// 释放链接getMethod.releaseConnection();httpClient.getHttpConnectionManager().closeIdleConnections(0);}if (isPrint)System.out.println(result);return result;}
}


demo中用到的jar包如下:
commons-codec-1.9.jar

commons-httpclient-3.1.jar

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