微信开发纪实之数字图书馆服务

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微信开发纪实之数字图书馆服务

最近在做微信的后台开发，看到有些高校的微信公众平台上有查询借阅和续借的功能，自己闲来无事也瞎鼓捣了一个，现在把成果贴出来和大家一起分享。

由于本人在武汉大学，故以武汉大学图书馆为例。

思路：

1. 模拟登陆

2. 抓取数据

语言：java

代码：DigitalLibraryService.java

packagecom.wdyx.weixin.service;

importjava.io.IOException;

importjava.util.ArrayList;

importjava.util.HashMap;

importjava.util.List;

importjava.util.Set;

importorg.apache.http.HttpEntity;

importorg.apache.http.HttpResponse;

importorg.apache.http.NameValuePair;

importorg.apache.http.client.ClientProtocolException;

import org.apache.http.client.entity.UrlEncodedFormEntity;

importorg.apache.http.client.methods.HttpPost;

importorg.apache.http.entity.BufferedHttpEntity;

importorg.apache.http.impl.client.CloseableHttpClient;

importorg.apache.http.impl.client.HttpClients;

importorg.apache.http.message.BasicNameValuePair;

importorg.apache.http.util.EntityUtils;

importorg.jsoup.Jsoup;

importorg.jsoup.nodes.Document;

importorg.jsoup.nodes.Element;

importorg.jsoup.select.Elements;

/**

* 数字图书馆服务

* 功能：查询个人信息、借阅信息、借阅历史，以及进行续借操作

* @author帮杰

public classDigitalLibraryService {

//主机地址

public static final String HOST ="http://metalib.lib.whu.edu.cn";

//登陆页面地址

public static final String LOGIN_URL ="http://apps.lib.whu.edu.cn/web/login.asp";

//表单post地址

public static final String POST_URL ="http://metalib.lib.whu.edu.cn:80/pds";

//借阅者信息

private String borrowerInfo = null;

//借阅信息

private String borrowInfo = null;

//借阅历史

private String borrowHistory = null;

//储存登录页，以备续借之需

private String renewPage = null;

//每一个客户即为一个HttpClient对象

private CloseableHttpClient httpclient= null;

//构造函数，以用户名和密码作为参数

public DigitalLibraryService(Stringusername,String password) throws ClientProtocolException, IOException{

//初始化HttpClient对象

httpclient =HttpClients.createDefault();

//解析登录页

Document doc =Jsoup.parse(login(username, password, httpclient));

//“我的借阅信息”所对应的url

String BorrowerInfoUrl =doc.getElementsContainingOwnText("我的借阅信息").first().attr("href");

//据观察有重定向；获得重定向地址

StringRelocatedBorrowerInfoUrl =HttpUtil.getHtml(BorrowerInfoUrl,httpclient).split("\'")[1];

//重定向页

StringRelocatedBorrowerInfoHtml =HttpUtil.getHtml(RelocatedBorrowerInfoUrl,httpclient);

//借阅者信息页

String BorrowerInfoHtml =HttpUtil.getHtml(HOST + HtmlUtil.getLinks(RelocatedBorrowerInfoHtml).get(0),httpclient);

//通过抓取获得借阅者信息

borrowerInfo =getBorrowerInfo(BorrowerInfoHtml);

doc =Jsoup.parse(BorrowerInfoHtml);

//"当前借阅数："后面的数字链接指向借阅信息页，故此处取得该链接

String BorrowInfoUrl =doc.getElementsContainingOwnText("当前借阅数：").parents().select("a").attr("href").split("\'")[1];

//借阅历史页面链接

String BorrowHistoryUrl =doc.getElementsContainingOwnText("借阅历史").attr("href");

//借阅信息页

String BorrowInfoHtml =HttpUtil.getHtml(BorrowInfoUrl, httpclient);

//借阅历史页

String BorrowHistoryHtml =HttpUtil.getHtml(BorrowHistoryUrl, httpclient);

//借阅信息

borrowInfo =getBorrowInfo(BorrowInfoHtml);

//借阅历史

borrowHistory = getBorrowHistory(BorrowHistoryHtml);

//借阅信息即为能进行续借操作的页面

renewPage = BorrowInfoHtml;

}

//得到借阅者信息

public String getBorrowerInfo(){

return borrowerInfo;

}

//得到借阅信息

public String getBorrowInfo(){

return borrowInfo;

}

//得到借阅历史

public String getBorrowHistory(){

return borrowHistory;

}

//续借，返回续借结果

public String renew(){

return renewBook(renewPage,httpclient);

}

/**

* 初始化POST表单参数

* @param username

* @param password

* @return List<NameValuePair>

* @throws IOException

* @throws ClientProtocolException

private static List<NameValuePair>initialLoginFormData(String username, String password)

throwsClientProtocolException, IOException {

List<NameValuePair> nvps = newArrayList<NameValuePair>();

HashMap<String, String> parmasMap= HtmlUtil.getLoginFormData(LOGIN_URL);

Set<String> keySet =parmasMap.keySet();

for (String temp : keySet) {

if(temp.contains("bor_id")) {

parmasMap.put(temp,username);

} else if(temp.contains("bor_verification")) {

parmasMap.put(temp,password);

}

nvps.add(newBasicNameValuePair(temp, parmasMap.get(temp)));

}

return nvps;

}

/**

* 登陆图书馆主页

* @param username

*@param password

* @param post_url

* @return 登陆后的图书馆主页

* @throws IOException

* @throws ClientProtocolException

private static String login(Stringusername,String password,CloseableHttpClient httpclient) {

Stringhtml = "";

try{

List<NameValuePair>nvps = initialLoginFormData(username, password);

HttpPost post = newHttpPost(POST_URL);

post.setEntity(newUrlEncodedFormEntity(nvps));

HttpResponse response = httpclient.execute(post);

HttpEntity entity = newBufferedHttpEntity(response.getEntity());

html =EntityUtils.toString(entity,HtmlUtil.getCharset(EntityUtils.toString(entity)));

String mainUrl = HOST +HtmlUtil.getLinks(html).get(0);

html =HttpUtil.getHtml(mainUrl,httpclient);

}catch(ClientProtocolExceptione){

e.printStackTrace();

}catch(IOExceptione){

e.printStackTrace();

}

return html;

}

/************************抽取数据**************************/

/**

* 抽取借阅者信息

* @param BorrowerInfoHtml

* @return BorrowerInfo

private static StringgetBorrowerInfo(String BorrowerInfoHtml){

StringBuffer buffer = newStringBuffer();

try{

List<String>key = new ArrayList<String>();

List<String>val = new ArrayList<String>();

Document doc =Jsoup.parse(BorrowerInfoHtml);

Elements elements =doc.select("table").select("tr");

Elements col1 =elements.select("td.td4");

Elements col2 =elements.select("td.td1");

for(Element tmp :col1){

key.add(tmp.text());

}

for(Element tmp :col2){

val.add(tmp.text());

}

buffer.append("------------您的个人信息------------\n\n");

for(inti=0;i<key.size();i++){

if(i != 3)

buffer.append(key.get(i)).append(val.get(i)).append("\n\n");

}

}catch(Exception e){

e.printStackTrace();

}

return (null == buffer) ?null : buffer.substring(0, buffer.lastIndexOf("\n\n"));

}

/**

* 抽取借阅信息

* @param username

* @param password

* @param login_url

* @return

private static StringgetBorrowInfo(String BorrowInfoHtml){

StringBuffer buffer = newStringBuffer();

try{

List<String>key = new ArrayList<String>();

List<String>val = new ArrayList<String>();

Document doc =Jsoup.parse(BorrowInfoHtml);

Elements th =doc.select("th.text3");

Elements td =doc.select("td.td1");

for(Element tmp :th){

key.add(tmp.text());

}

for(Element tmp :td){

val.add(tmp.text());

}

buffer.append("------------您的借阅信息------------\n\n");

int itemCounts =key.size();

int groupCounts =val.size()/itemCounts;

for(inti=0;i<groupCounts;i++){

for(intj=0;j<itemCounts;j++){

if(j!=1)

buffer.append(key.get(j)+(j==0?"":":")).append(val.get(i*itemCounts+j)).append("\n\n");

}

buffer.append("-----------------------------------\n\n");

}

}catch(Exception e){

e.printStackTrace();

}

return (buffer ==null)?null:buffer.substring(0, buffer.lastIndexOf("-----------------------------------\n\n"));

}

/**

* 抽取借阅历史

* @param username

* @param password

* @param login_url

* @return

private static StringgetBorrowHistory(String BorrowHistoryHtml){

StringBuffer buffer = newStringBuffer();

try{

List<String>key = new ArrayList<String>();

List<String>val = new ArrayList<String>();

Document doc =Jsoup.parse(BorrowHistoryHtml);

Elements th =doc.select("th.text3");

Elements td =doc.select("td.td1");

for(Element tmp :th){

key.add(tmp.text());

}

for(Element tmp :td){

val.add(tmp.text());

}

buffer.append("------------您的借阅历史------------\n\n");

val.remove(0);

int itemCounts =key.size();

int groupCounts =val.size()/itemCounts;

for(inti=0;i<groupCounts;i++){

for(intj=0;j<itemCounts;j++){

buffer.append(key.get(j)+(j==0?"":":")).append(val.get(i*itemCounts+j)).append("\n\n");

}

buffer.append("-----------------------------------\n\n");

}

}catch(Exception e){

e.printStackTrace();

}

return (buffer ==null)?null:buffer.substring(0,buffer.lastIndexOf("-----------------------------------\n\n"));

}

/**

* 续借

* @param renewHtml

* @param httpclient

* @return 续借结果

private static String renewBook(StringrenewHtml,CloseableHttpClient httpclient){

StringBuffer buffer = newStringBuffer();

try{

Document doc =Jsoup.parse(renewHtml);

String url =doc.getElementsContainingOwnText("全部续借").attr("href").split("\'")[1];

String resultPage =HttpUtil.getHtml(url,httpclient);

doc =Jsoup.parse(resultPage);

Elements th =doc.select("tr.tr1").select("th");

Elements td =doc.select("td.td1");

List<String>key = new ArrayList<String>();

List<String>val = new ArrayList<String>();

for(Element tmp :th){

key.add(tmp.text());

}

for(Element tmp :td){

val.add(tmp.text());

}

buffer.append("------------您的续借结果------------\n\n");

int itemCounts =key.size();

int groupCounts =val.size()/itemCounts;

for(inti=0;i<groupCounts;i++){

for(intj=0;j<itemCounts;j++){

buffer.append(key.get(j)+":").append(val.get(i*itemCounts+j)).append("\n\n");

}

buffer.append("-----------------------------------\n\n");

}

}catch(Exception e){

e.printStackTrace();

}

return (buffer ==null)?null:buffer.substring(0,buffer.lastIndexOf("-----------------------------------\n\n"));

}

//测试

public static void main(String[] args)throws Exception {

String username = "*************";

String password = "******";

DigitalLibraryServicemyDigitalLibraryService = new DigitalLibraryService(username,password);

//System.out.println("---------------------------------个人信息----------------------------------");

System.out.println(myDigitalLibraryService.getBorrowerInfo());

//System.out.println("---------------------------------借阅信息----------------------------------");

System.out.println(myDigitalLibraryService.getBorrowInfo());

//System.out.println("---------------------------------借阅历史----------------------------------");

System.out.println(myDigitalLibraryService.getBorrowHistory());

//System.out.println("---------------------------------续借结果----------------------------------");

System.out.println(myDigitalLibraryService.renew());

}

测试效果如下：

由于截图显示不全，我把结果贴在下面：

------------您的个人信息------------

姓??名：?莫帮杰

读者证号：?2013301200227

有效期：?20170630

当前借阅数：1

预约请求数：0

现金记录：0.00

------------您的借阅信息------------

No.1

著者:郭珍

题名:JSP程序设计教程

出版年:2012

应还日期:20150311

应还时间:22:00

罚款:

分馆:总馆图书借阅区A2-A5

索书号:TP393.092/G591c2

单册描述:

SFX:

------------您的借阅历史------------

No.1

著者:郭珍

题名:JSP程序设计教程

年:2012

应还日期:20141229

应还时间:22:00

归还日期:20141221

归还时间:19:11

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.2

著者:IBMG国际商业管理集团

题名:榜样的力量 :连锁零售企业背后的故事 :the stories of the retailers

年:2012

应还日期:20141210

应还时间:22:00

归还日期:20141124

归还时间:19:10

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.3

著者:周星潼

题名:芝麻开门 :成就阿里巴巴网络帝国的13个管理法则

年:2012

应还日期:20141210

应还时间:22:00

归还日期:20141124

归还时间:19:10

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.4

著者:赖利

题名:乐享Arduino+Android+PC创意制作

年:2014

应还日期:20141202

应还时间:22:00

归还日期:20141102

归还时间:10:42

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.5

著者:赖利

题名:乐享Arduino+Android+PC创意制作

年:2014

应还日期:20141202

应还时间:22:00

归还日期:20141124

归还时间:19:10

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.6

著者:威尔弗雷德

题名:PHP专业项目实例开发

年:2003

应还日期:20141115

应还时间:22:00

归还日期:20141108

归还时间:09:51

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.7

著者:潘凯华

题名:PHP求职宝典

年:2012

应还日期:20141114

应还时间:22:00

归还日期:20141108

归还时间:09:51

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.8

著者:赖利

题名:乐享Arduino+Android+PC创意制作

年:2014

应还日期:20141020

应还时间:22:00

归还日期:20141012

归还时间:15:14

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.9

著者:叶青

题名:网页开发手记 :HTML+CSS+JavaScript实战详解

年:2011

应还日期:20141020

应还时间:22:00

归还日期:20141012

归还时间:15:15

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.10

著者:叶青

题名:网页开发手记 :HTML+CSS+JavaScript实战详解

年:2011

应还日期:20140929

应还时间:22:00

归还日期:20140920

归还时间:18:31

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.11

著者:赖利

题名:乐享Arduino+Android+PC创意制作

年:2014

应还日期:20140929

应还时间:22:00

归还日期:20140920

归还时间:18:31

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.12

著者:刘剑

题名:51单片机开发与应用基础教程 :C语言版

年:2012

应还日期:20140911

应还时间:22:00

归还日期:20140701

归还时间:14:16

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.13

著者:熊斌

题名:Android多媒体开发技术实战详解

年:2012

应还日期:20140911

应还时间:22:00

归还日期:20140830

归还时间:19:00

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.14

著者:贝内特

题名:Objective-C初学者指南

年:2012

应还日期:20140911

应还时间:22:00

归还日期:20140830

归还时间:19:01

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.15

著者:张海霞

题名:奇思妙想的物联网 :2012年中国大学生物联网创新创业大赛获奖作品集锦

年:2013

应还日期:20140911

应还时间:22:00

归还日期:20140830

归还时间:19:01

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.16

著者:赖利

题名:乐享Arduino+Android+PC创意制作

年:2014

应还日期:20140911

应还时间:22:00

归还日期:20140830

归还时间:19:02

罚款:

分馆:总馆图书借阅区A2-A5

-----------------------------------

No.17

著者:叶青

题名:网页开发手记 :HTML+CSS+JavaScript实战详解

年:2011

应还日期:20140911

应还时间:22:00

归还日期:20140830

归还时间:19:02

罚款:

分馆:总馆图书借阅区A2-A5

------------您的续借结果------------

序号:1

描述:JSP程序设计教程

单册状态:已借出

应还日期:20150311

应还时间:22:00

分馆:总馆图书借阅区A2-A5

条码:101101630602

单册描述:

未能续借的原因:不能再续借 (还书日期没改变)。

我把代码中的HttpUtil.java也贴出来：

packagecom.wdyx.weixin.service;

importjava.io.BufferedReader;

importjava.io.IOException;

importjava.io.InputStream;

importjava.io.InputStreamReader;

importjava.net.HttpURLConnection;

importjava.net.URL;

import org.apache.http.HttpEntity;

importorg.apache.http.HttpResponse;

importorg.apache.http.client.ClientProtocolException;

importorg.apache.http.client.methods.HttpGet;

importorg.apache.http.entity.BufferedHttpEntity;

importorg.apache.http.impl.client.CloseableHttpClient;

importorg.apache.http.impl.client.HttpClients;

importorg.apache.http.util.EntityUtils;

/**

* HTTP小工具

* @author 帮杰

public classHttpUtil {

/**

* 判断是否有重定向

* @param response

* @return boolean

public static boolean isRedirected(HttpResponseresponse){

int code =response.getStatusLine().getStatusCode();

return(code==301||code==302)?true:false;

}

/**

* 得到重定向Location

* @param response

* @return String

public static StringgetLocation(HttpResponse response){

returnresponse.getHeaders("Location")[0].toString();

}

/**

* 处理重定向

* @param response

* @param httpclient

* @return HttpResponse

public static HttpResponsehandleRedirect(HttpResponse response,CloseableHttpClient httpclient){

if(isRedirected(response)){

try {

Stringlocation = getLocation(response);

HttpGethttpget = new HttpGet(location);

response =httpclient.execute(httpget);

} catch(ClientProtocolException e) {

// TODOAuto-generated catch block

e.printStackTrace();

} catch (IOExceptione) {

// TODOAuto-generated catch block

e.printStackTrace();

}

return response;

}

/**

* 新请求一个页面

* @param url

* @return HTML

* @throws IOException

* @throws ClientProtocolException

* @return String

public static String getHtml(Stringurl) throws ClientProtocolException, IOException {

String html = "";

HttpGet httpget = newHttpGet(url);

HttpResponse response =HttpClients.createDefault().execute(httpget);

HttpEntity entity = newBufferedHttpEntity(response.getEntity());

String charset =HtmlUtil.getCharset(EntityUtils.toString(entity));

html =EntityUtils.toString(entity,charset);

return html;

}

/**

* 新请求一个页面，自动处理重定向

* @param url

* @return HTML

* @throws IOException

* @throws ClientProtocolException

* @return String

public static String getHtml3xx(Stringurl) throws ClientProtocolException, IOException {

String html = "";

HttpGet httpget = newHttpGet(url);

CloseableHttpClienthttpclient = HttpClients.createDefault();

HttpResponse response =handleRedirect(httpclient.execute(httpget),httpclient);

HttpEntity entity = newBufferedHttpEntity(response.getEntity());

String charset =HtmlUtil.getCharset(EntityUtils.toString(entity));

html =EntityUtils.toString(entity,charset);

return html;

}

/**

* 指定client请求页面

* @param url

* @param httpclient

* @return HTML

* @throws IOException

* @throws ClientProtocolException

* @return String

public static String getHtml(Stringurl,CloseableHttpClient httpclient) throws ClientProtocolException, IOException{

String html = "";

HttpGet httpget = newHttpGet(url);

HttpResponse response =httpclient.execute(httpget);

HttpEntity entity = newBufferedHttpEntity(response.getEntity());

String charset =HtmlUtil.getCharset(EntityUtils.toString(entity));

html =EntityUtils.toString(entity,charset);

return html;

}

/**

* 指定client请求页面，自动处理重定向

* @param url

* @param httpclient

* @return HTML

* @throws IOException

* @throws ClientProtocolException

* @return String

public static String getHtml3xx(Stringurl,CloseableHttpClient httpclient) throws ClientProtocolException, IOException{

Stringhtml = "";

HttpGet httpget = newHttpGet(url);

HttpResponse response =handleRedirect(httpclient.execute(httpget),httpclient);

HttpEntity entity = newBufferedHttpEntity(response.getEntity());

String charset =HtmlUtil.getCharset(EntityUtils.toString(entity));

html =EntityUtils.toString(entity,charset);

return html;

}

/**

* 另一种发起http get请求获取网页源代码的方法

* 有时候会快一些

* @param requestUrl

* @return String

public static String httpRequest(StringrequestUrl,String charset) {

StringBuffer buffer = null;

try {

// 建立连接

URL url = new URL(requestUrl);

HttpURLConnection httpUrlConn =(HttpURLConnection) url.openConnection();

httpUrlConn.setDoInput(true);

httpUrlConn.setRequestMethod("GET");

// 获取输入流

InputStream inputStream =httpUrlConn.getInputStream();

InputStreamReader inputStreamReader= new InputStreamReader(inputStream, charset);

BufferedReader bufferedReader = newBufferedReader(inputStreamReader);

// 读取返回结果

buffer = new StringBuffer();

String str = null;

while ((str = bufferedReader.readLine())!= null) {

buffer.append(str);

}

// 释放资源

bufferedReader.close();

inputStreamReader.close();

inputStream.close();

httpUrlConn.disconnect();

} catch (Exception e) {

e.printStackTrace();

}

return buffer.toString();

}

还有HtmlUtil.java

packagecom.wdyx.weixin.service;

importjava.io.IOException;

importjava.net.MalformedURLException;

importjava.net.URL;

importjava.util.ArrayList;

importjava.util.HashMap;

importjava.util.List;

importorg.apache.http.client.ClientProtocolException;

importorg.jsoup.Jsoup;

importorg.jsoup.nodes.Document;

importorg.jsoup.nodes.Element;

importorg.jsoup.select.Elements;

/**

* HTML小工具

* @author 帮杰

public classHtmlUtil {

private static final String GBK ="GBK";

private static final String GB_2312 ="GB2312";

private static final String UTF_8 ="UTF-8";

private static final String UTF_16 ="UTF-16";

private static final String ISO_8859_1= "ISO-8859-1";

private static final String ISO_8859_2= "ISO-8859-2";

private static final String ISO_8859_3= "ISO-8859-3";

private static final String ISO_8859_4= "ISO-8859-4";

private static final String ISO_8859_5= "ISO-8859-5";

private static final String ISO_8859_6= "ISO-8859-6";

private static final String ISO_8859_7= "ISO-8859-7";

private static final String ISO_8859_8= "ISO-8859-8";

private static final String ISO_8859_9= "ISO-8859-9";

private static final String ISO_8859_10= "ISO-8859-10";

private static final String ISO_8859_15= "ISO-8859-15";

private static final String ISO_2022_JP= "ISO-2022-JP";

private static final StringISO_2022_JP_2 = "ISO-2022-JP-2";

private static final String ISO_2022_KR= "ISO-2022-KR";

/**

* 列举所有字符编码

* @return List<String>

private static List<String>getCharsetList(){

List<String>charsetList = new ArrayList<String>();

charsetList.add(GBK);

charsetList.add(GB_2312);

charsetList.add(UTF_8);

charsetList.add(UTF_16);

charsetList.add(ISO_8859_1);

charsetList.add(ISO_8859_2);

charsetList.add(ISO_8859_3);

charsetList.add(ISO_8859_4);

charsetList.add(ISO_8859_5);

charsetList.add(ISO_8859_6);

charsetList.add(ISO_8859_7);

charsetList.add(ISO_8859_8);

charsetList.add(ISO_8859_9);

charsetList.add(ISO_8859_10);

charsetList.add(ISO_8859_15);

charsetList.add(ISO_2022_JP);

charsetList.add(ISO_2022_JP_2);

charsetList.add(ISO_2022_KR);

return charsetList;

}

/**

* 获取HTML页面的字符集

* @param html

* @return

public static String getCharset(Stringhtml){

String charSet ="utf-8";

try{

Document doc =Jsoup.parse(html);

String content =doc.getElementsByTag("meta").select("[http-equiv=Content-Type]").attr("content");

List<String>charSetList = getCharsetList();

if(content != null){

for(Stringcharset : charSetList){

if(content.contains(charset)||content.contains(charset.toLowerCase())){

charSet= charset;

break;

}

}finally{

}

return charSet;

}

/**

* 获取HTML页面的所有链接

* @param html

* @return HTML页面的所有链接

public static List<String>getLinks(String html){

List<String> links =new ArrayList<String>();

try{

Document doc =Jsoup.parse(html);

Elements elements =doc.select("a[href]");

for(Element element: elements){

links.add(element.attr("href"));

}

}catch(Exception e){

e.printStackTrace();

}

return links;

}

/**

* 获取HTML页面的所有资源地址

* @param html

* @return HTML页面的所有资源地址

public static List<String>getSrc(String html){

List<String> src = newArrayList<String>();

try{

Document doc =Jsoup.parse(html);

Elements elements =doc.select("[src]");

for(Element element: elements){

src.add(element.attr("src"));

}

}catch(Exception e){

e.printStackTrace();

}

return src;

}

/**

* 获取HTML登录页面的action地址

* @param login_url

* @return String

public static String getAction(Stringlogin_url){

String action = "";

try {

Document doc =Jsoup.parse(new URL(login_url), 5000) ;

Elements elements =doc.getElementsByTag("form");

Element element =elements.select("[method=post]").first();

action =element.attr("action");

} catch (MalformedURLExceptione) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return action;

}

/**

* 获取登录表单input内容

* @param url

* @return HashMap<String, String>

* @throws IOException

* @throws ClientProtocolException

public static HashMap<String, String>getLoginFormData(String login_url) throws ClientProtocolException, IOException{

Document document = Jsoup.parse(newURL(login_url), 5000) ;

Elements elements =document.getElementsByTag("form").select("[method=post]").first().select("input[name]");

HashMap<String, String> parmas =new HashMap<String, String>();

for (Element temp : elements) {

parmas.put(temp.attr("name"),temp.attr("value"));

}

return parmas;

}

有了获得相关信息的方法后，再和微信的消息机制整合，就可以实现在微信平台上的数字图书馆服务，具体整合方式此处不再赘述。

此处虽以以武大图书馆为例，但其方法是通用的。其他学校的朋友如果想做这项服务的话只需修改少量代码即可复用。

好了，今天就到此为止了，如果有盆友有更好的思路或改进方法，请联系我，我们共同学习和探讨。我的邮箱是：mobangjack@foxmail.com

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