HttpClient封裝類：https://shentuzhigang.blog.csdn.net/article/details/104274609?

FineReportUtil?

package cn.edu.zstu.myzstu.spyder.ezstu;import cn.edu.zstu.myzstu.utils.consts.Consts; import cn.edu.zstu.myzstu.utils.httpclient.HttpClientUtils; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element;import java.util.HashMap; import java.util.Map;/*** @Author ShenTuZhiGang* @Version 1.0.0* @Date 2020-07-12 15:20*/ public class FineReportUtil {public static String getSessionID(String url, String username, String viewlet) throws Exception {String sessionid = "";Map<String, String> header = new HashMap<>();header.put("User-Agent", Consts.AGENT);header.put("Host", Consts.EZLHOST);Map<String, String> params = new HashMap<>();params.put("viewlet", viewlet);params.put("__pi__", "true");params.put("op", "h5");params.put("username", username);String htmlText = HttpClientUtils.doGetRequest(url, header, params);Document doc = Jsoup.parse(htmlText, "UTF-8");Element element = doc.select("script").get(1);sessionid = element.toString().split("get")[7].split("'")[1];return sessionid;} }

DEMO

package cn.edu.zstu.myzstu.spyder.ezstu.query;import cn.edu.zstu.myzstu.model.lib.BookRecord; import cn.edu.zstu.myzstu.spyder.ezstu.FineReportUtil; import cn.edu.zstu.myzstu.utils.consts.Consts; import cn.edu.zstu.myzstu.utils.httpclient.HttpClientUtils; import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.springframework.stereotype.Component;import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map;/*** @Author ShenTuZhiGang* @Version 1.0.0* @Date 2020-07-12 15:18*/ @Component public class LibraryQuery {private static final String ezlUrl = Consts.PROTOCOL + Consts.EZLHOST +"/webroot/decision/view/report";public Map<String, List<BookRecord>> getBorrowList(String sid) throws Exception{Map<String, List<BookRecord>> res = new HashMap<>();List<BookRecord> borrowlist = new ArrayList<>();List<BookRecord> historylist = new ArrayList<>();String sessionid = FineReportUtil.getSessionID(ezlUrl,sid,"/yiban/S圖書借閱情況查詢.cpt");Map<String, String> header = new HashMap<>();header.put("User-Agent", Consts.AGENT);header.put("Host", Consts.EZLHOST);header.put("sessionID", sessionid);String htmlText = HttpClientUtils.doPostRequest(ezlUrl, header, inputGetForm(sessionid, "1")).getContent();//System.out.println(htmlText);JSONObject resjson = JSONObject.parseObject(htmlText);JSONArray bookjson = resjson.getJSONObject("pageContent").getJSONArray("detail").getJSONObject(0).getJSONObject("cellData").getJSONArray("rows");String sname = bookjson.getJSONObject(4).getJSONArray("cells").getJSONObject(2).getString("text");if(sname.equals("")) {throw new Exception("201|學號錯誤");}int pagenum = resjson.getInteger("reportTotalPage");int borrownum = Integer.parseInt(bookjson.getJSONObject(6).getJSONArray("cells").getJSONObject(2).getString("text"));int size = pagenum == 1 ? bookjson.size() - 5 : bookjson.size();for(int k = 15; k < size; k ++) {JSONArray bookinfo = bookjson.getJSONObject(k).getJSONArray("cells");String bookname = bookinfo.getJSONObject(2).getString("text");String borrowdate = bookinfo.getJSONObject(5).getString("text");BookRecord bookRecord = new BookRecord();bookRecord.setBookName(bookname);bookRecord.setBorrowDate(borrowdate);if(borrowlist.size() < borrownum || k - 14 <= 2* borrownum) {if(borrowlist.size() == 0 || (borrowlist.size() > 0 && (!bookname.equals(borrowlist.get(borrowlist.size() - 1).getBookName()) || !borrowdate.equals(borrowlist.get(borrowlist.size() - 1).getBorrowDate())))) {borrowlist.add(bookRecord);}else continue;}else{historylist.add(bookRecord);}}for(int i = 1; i < pagenum; i ++) {htmlText = HttpClientUtils.doPostRequest(ezlUrl, header, inputGetForm(sessionid, i+1+"")).getContent();resjson = JSONObject.parseObject(htmlText);bookjson = resjson.getJSONObject("pageContent").getJSONArray("detail").getJSONObject(0).getJSONObject("cellData").getJSONArray("rows");size = i + 1 < pagenum ? bookjson.size() : bookjson.size() - 4;for(int k = 0; k < size; k ++) {JSONArray bookinfo = bookjson.getJSONObject(k).getJSONArray("cells");String bookname = bookinfo.getJSONObject(2).getString("text");String borrowdate = bookinfo.getJSONObject(5).getString("text");BookRecord bookRecord = new BookRecord();bookRecord.setBookName(bookname);bookRecord.setBorrowDate(borrowdate);if(borrowlist.size() < borrownum) {if(borrowlist.size() == 0 || (borrowlist.size() > 0 && (!bookname.equals(borrowlist.get(borrowlist.size() - 1).getBookName()) || !borrowdate.equals(borrowlist.get(borrowlist.size() - 1).getBorrowDate())))) {borrowlist.add(bookRecord);}}else {historylist.add(bookRecord);}}}res.put("borrowlist", borrowlist);res.put("historylist", historylist);return res;}//填充請求信息private Map<String,String> inputGetForm(String sessionid, String pagenum) {Map<String,String > formData = new HashMap<>();formData.put("toVanCharts", "true");formData.put("dynamicHyperlink", "true");formData.put("op", "page_content");formData.put("cmd", "json");formData.put("sessionID", sessionid);formData.put("pn", pagenum);formData.put("__fr_locale__", "zh_CN");return formData;}}

參考文章

https://blog.csdn.net/whyorg/article/details/54018060

與50位技術專家面對面20年技術見證，附贈技術全景圖

總結

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