Java模拟登录正方教务抓取成绩、课表、空教室

本文实例为大家分享了Java模拟登录正方教务抓取成绩、课表、空教室等信息，供大家参考，具体内容如下

1.Jwgl.java

package com.ican.yueban.jwgl;
 
import java.io.IOException;
 
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
 
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;
 
import com.ican.yueban.utils.DateUtils;
import com.ican.yueban.utils.GlobalConstant;
import com.ican.yueban.utils.IOUtils;
import com.ican.yueban.utils.ParseUtils;
 
public class Jwgl {
  private static String stuNumber = "";
  private static String stuName = "";
  private static String Cookie = "";
  private String indexUrl = GlobalConstant.INDEX_URL;
  private String secretCodeUrl = GlobalConstant.SECRETCODE_URL;
  private String loginUrl = GlobalConstant.LOGIN_URL;
  private String mainUrl = GlobalConstant.MAIN_URL;
  private String queryClassroomUrl = GlobalConstant.QUERY_CLASSROOM_URL;
  private String queryClassroomGnmkdm = GlobalConstant.QUERY_CLASSROOM_GNMKDM;
  private String queryStuGradeUrl = GlobalConstant.QUERY_STU_GRADE_URL;
  private String queryStuGradeGnmkd = GlobalConstant.QUERY_STU_GRADE_GNMKDM;
  private String queryStuCourseUrl = GlobalConstant.QUERY_STU_COURSE_URL;
  private String queryStuCourseGnmkd = GlobalConstant.QUERY_STU_COURSE_GNMKDM;
  private String xixiaoqu = GlobalConstant.XIXIAOQU;
  private String identityStu = GlobalConstant.IDENTITY_STU;
 
  /**
   * 登录功能
   * 
   * @param stuNumber
   * @param password
   * @return
   * @throws Exception
   * @throws UnsupportedOperationException
   */
  public boolean login(String stuNumber, String password)
      throws UnsupportedOperationException, Exception {
    this.stuNumber = stuNumber;
    // 获取验证码
    HttpGet secretCodeGet = new HttpGet(secretCodeUrl);
    CloseableHttpClient client = HttpClients.createDefault();
    CloseableHttpResponse responseSecret = client.execute(secretCodeGet);
    // 获取返回的Cookie
    Cookie = responseSecret.getFirstHeader("Set-Cookie").getValue();
    String viewState = IOUtils.getViewState(indexUrl, "", "");
    // 将验证码下载到C盘
    IOUtils.getSecret(responseSecret.getEntity().getContent(),
        "secretCode.png", "c://");
    Scanner sc = new Scanner(System.in);
    System.out.println("请输入验证码：");
    // 手动填充刚才获取的验证码的值
    String secret = sc.next().trim();
    HttpPost loginPost = new HttpPost(loginUrl);// 创建登录的Post请求
    loginPost.setHeader("Cookie", Cookie);// 带上第一次请求的Cookie
    List nameValuePairLogin = new ArrayList();// 封装Post提交参数
    nameValuePairLogin
        .add(new BasicNameValuePair("__VIEWSTATE", viewState));// 隐藏表单值
    nameValuePairLogin
        .add(new BasicNameValuePair("txtUserName", stuNumber));// 学号
    nameValuePairLogin.add(new BasicNameValuePair("TextBox2", password));// 密码
    nameValuePairLogin.add(new BasicNameValuePair("txtSecretCode", secret));// 验证码
    nameValuePairLogin.add(new BasicNameValuePair("RadioButtonList1",
        identityStu));// 身份,默认学生
    nameValuePairLogin.add(new BasicNameValuePair("Button1", ""));
    nameValuePairLogin.add(new BasicNameValuePair("lbLanguage", ""));
    nameValuePairLogin.add(new BasicNameValuePair("hidPdrs", ""));
    nameValuePairLogin.add(new BasicNameValuePair("hidsc", ""));
    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(
        nameValuePairLogin, "GB2312");
    loginPost.setEntity(entity);
    HttpResponse responseLogin = client.execute(loginPost);
    // client1.close();
    // 第三步:判断提交数据是否成功，成功返回302
    if (responseLogin.getStatusLine().getStatusCode() == 302) {
      // 如果提交成功，带着Cookie请求重定向的main页面，并获取学生姓名
      HttpGet mainGet = new HttpGet(mainUrl + stuNumber);
      mainGet.setHeader("Cookie", Cookie);
      mainGet.setHeader("Referer", loginUrl);
      HttpResponse responseMain = client.execute(mainGet);
      InputStream is = responseMain.getEntity().getContent();
      String html = "";
      try {
        html = IOUtils.getHtml(is, "GB2312");
      } catch (Exception e) {
        System.out.println("解析html失败！");
        e.printStackTrace();
      }
      stuName = Jsoup.parse(html).getElementById("xhxm").text();
      System.out.println("登录成功！欢迎您：" + stuName);
      client.close();
      return true;
    } else {
      System.out.println("登录失败！");
      client.close();
      return false;
    }
 
  }
 
  /**
   * 查询空教室
   * 
   * @throws Exception
   * 
   * @throws Exception
   */
  public void queryClassroom(String xiaoqu, String xqj, String sjd)
      throws Exception {
 
    CloseableHttpClient client = HttpClients.createDefault();
    String newQueryClassrommUrl = queryClassroomUrl + stuNumber + "&xm="
        + stuName + queryClassroomGnmkdm;// 拼接请求的Url
    String parseSjd = ParseUtils.parseWeek(sjd);// 解析当前节次对应的字符串
    String nowWeek = DateUtils.getWeek() + "";// 获取当前时间是第几周
    String viewState = IOUtils.getViewState(newQueryClassrommUrl, Cookie,
        mainUrl + stuNumber);
    // 封装查询空教室请求参数
    List queryClassroomPair = new ArrayList();
    queryClassroomPair.add(new BasicNameValuePair("__EVENTTARGET", ""));
    queryClassroomPair.add(new BasicNameValuePair("__EVENTARGUMENT", ""));
    queryClassroomPair
        .add(new BasicNameValuePair("__VIEWSTATE", viewState));
    queryClassroomPair.add(new BasicNameValuePair("xiaoq", xiaoqu));// 校区类型，默认西校区
    queryClassroomPair.add(new BasicNameValuePair("jslb", ""));// 教室类别，默认为空
    queryClassroomPair.add(new BasicNameValuePair("min_zws", "0"));// 最小座位数，默认为0
    queryClassroomPair.add(new BasicNameValuePair("max_zws", ""));// 最大座位数，默认为空
    queryClassroomPair.add(new BasicNameValuePair("ddlKsz", nowWeek));// 起始周，默认当前周
    queryClassroomPair.add(new BasicNameValuePair("ddlJsz", nowWeek));// 结束周，默认当前周
    queryClassroomPair.add(new BasicNameValuePair("xqj", xqj));// 星期几,默认当天
    queryClassroomPair.add(new BasicNameValuePair("ddlDsz", ""));// 单双周，默认
    queryClassroomPair.add(new BasicNameValuePair("sjd", parseSjd));// 第几节
    queryClassroomPair.add(new BasicNameValuePair("Button2", "空教室查询"));
    queryClassroomPair.add(new BasicNameValuePair("xn", "2015-2016"));
    queryClassroomPair.add(new BasicNameValuePair("xq", "2"));
    queryClassroomPair.add(new BasicNameValuePair("ddlSyXn", "2015-2016"));
    queryClassroomPair.add(new BasicNameValuePair("ddlSyxq", "2"));
    UrlEncodedFormEntity entityClassroom = new UrlEncodedFormEntity(
        queryClassroomPair);
 
    HttpPost queryClassroomPost = new HttpPost(newQueryClassrommUrl);
    // newQueryClassrommUrl示例:http://jwgl2.ujn.edu.cn/xxjsjy.aspx?xh=20121214104&xm=XXX&gnmkdm=N121611
    queryClassroomPost.setEntity(entityClassroom);
    queryClassroomPost.setHeader("Referer", mainUrl + stuNumber);// 设置头信息
    queryClassroomPost.setHeader("Cookie", Cookie);
    HttpResponse responseClassroom = client.execute(queryClassroomPost);
    InputStream is = responseClassroom.getEntity().getContent();
    String html = IOUtils.getHtml(is, "GB2312");
    Document doc = Jsoup.parse(html);
    Elements eleClassroom = doc.select("td");
    Elements eleInfo = doc.select("#lblbt");
    System.out.println(eleInfo.get(0).text());
    for (int i = 0; i < eleClassroom.size(); i++) {
      // 只打印教室名称
      if (i % 8 == 1) {
        System.out.println(eleClassroom.get(i).text());
      }
    }
    client.close();
  }
 
  /**
   * 重载查询空教室方法，默认时间，课程节次的无参数查询方法
   * 
   * @throws IOException
   * @throws ClientProtocolException
   */
  public void queryClassroom() throws ClientProtocolException, IOException,
      Exception {
    String weekDay = DateUtils.getWeekDay() + "";// 获取当前时间是星期几
    String sdj = DateUtils.getNowCourse() + "";// 获取当前时间是第几节课
    new Jwgl().queryClassroom(xixiaoqu, weekDay, sdj);
  }
 
  /**
   * 查询个人成绩方法
   * 
   * @throws ClientProtocolException
   * @throws IOException
   */
  public void queryStuGrade(String xn, String xq)
      throws ClientProtocolException, IOException {
    CloseableHttpClient client = HttpClients.createDefault();
    String newQueryStuGradeUrl = queryStuGradeUrl + stuNumber + "&xm="
        + stuName + queryStuGradeGnmkd;
    HttpPost queryGradePost = new HttpPost(newQueryStuGradeUrl);
    String viewState = IOUtils.getViewState(newQueryStuGradeUrl, Cookie,
        mainUrl + stuNumber);
    // 封装请求参数
    List queryGradePair = new ArrayList();
    queryGradePair.add(new BasicNameValuePair("__EVENTTARGET", ""));
    queryGradePair.add(new BasicNameValuePair("__EVENTARGUMENT", ""));
    queryGradePair.add(new BasicNameValuePair("__VIEWSTATE", viewState));
    queryGradePair.add(new BasicNameValuePair("hidLanguage", ""));
    queryGradePair.add(new BasicNameValuePair("ddlXN", xn));// 学年
    queryGradePair.add(new BasicNameValuePair("ddlXQ", xq));// 学期
    queryGradePair.add(new BasicNameValuePair("ddl_kcxz", ""));
    queryGradePair.add(new BasicNameValuePair("btn_xq", "学期成绩"));
    queryGradePost.setHeader("Cookie", Cookie);
    queryGradePost.setHeader("Referer", mainUrl + stuNumber);
    UrlEncodedFormEntity entityGrade = new UrlEncodedFormEntity(
        queryGradePair);
    queryGradePost.setEntity(entityGrade);
    HttpResponse responQueryGradePost = client.execute(queryGradePost);
 
    String gradeHtml = IOUtils.getHtml(responQueryGradePost.getEntity()
        .getContent(), "GB2312");
    // System.out.println(gradeHtml);
    Document gradeDoc = Jsoup.parse(gradeHtml);
    Elements eleGrade = gradeDoc.select("td");
    // 按需求解析html标签内容并输出
    for (int i = 0; i < 7; i++) {
      System.out.println(eleGrade.get(i).text());
    }
 
    for (int i = 11; i < eleGrade.size(); i = i + 10) {
      if (i + 15 < eleGrade.size()) {
        System.out.print(eleGrade.get(i).text() + "       ");
        i = i + 5;
        System.out.print(eleGrade.get(i).text());
        System.out.println();
      }
      client.close();
 
    }
 
  }
 
  /**
   * 查询个人课表方法
   * 
   * @param xnd
   * @param xqd
   * @throws ClientProtocolException
   * @throws IOException
   */
  public void queryStuCourse(String xnd, String xqd)
      throws ClientProtocolException, IOException {
    CloseableHttpClient client = HttpClients.createDefault();
    String newQueryStuCourseUrl = queryStuCourseUrl + stuNumber + "&xm="
        + stuName + queryStuCourseGnmkd;
    String viewState = IOUtils.getViewState(newQueryStuCourseUrl, Cookie,
        mainUrl + stuNumber);
    HttpPost queryStuCoursePost = new HttpPost(newQueryStuCourseUrl);
    List stuCoursePair = new ArrayList();
    stuCoursePair.add(new BasicNameValuePair("__EVENTTARGET", "xqd"));
    stuCoursePair.add(new BasicNameValuePair("__EVENTARGUMENT", ""));
    stuCoursePair.add(new BasicNameValuePair("__VIEWSTATE", viewState));
    stuCoursePair.add(new BasicNameValuePair("xnd", xnd));
    stuCoursePair.add(new BasicNameValuePair("xqd", xqd));
    UrlEncodedFormEntity entitySource = new UrlEncodedFormEntity(
        stuCoursePair);
    queryStuCoursePost.setEntity(entitySource);
    queryStuCoursePost.setHeader("Cookie", Cookie);
    queryStuCoursePost.setHeader("Referer", mainUrl + stuNumber);
    HttpResponse responseStuCourse = client.execute(queryStuCoursePost);
    String html = IOUtils.getHtml(responseStuCourse.getEntity()
        .getContent(), "GB2312");
    Document docCourse = Jsoup.parse(html);
    Elements eleCourse = docCourse.select("td");
    for (int i = 2; i < eleCourse.size(); i++) {
      System.out.print(eleCourse.get(i).text() + "  ");
      if (i % 9 == 0) {
        System.out.println();
      }
    }
  }
 
  public static void main(String[] args) {
    Jwgl jw = new Jwgl();
    try {
      jw.login("这里是学号", "这里是密码");
      System.out.println("查询成绩测试-------");
      jw.queryStuGrade("2015-2016", "1");
      // 查询西校区，周一，第12节空教室测试。
      // jw.queryClassroom("1", "1", "2");
      System.out.println("查询空教室测试------");
      jw.queryClassroom();
      System.out.println("查询个人课表测试-------");
      jw.queryStuCourse("2014-2015", "1");
    } catch (ClientProtocolException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    } catch (Exception e) {
      e.printStackTrace();
    }
    //QQ:451209214
  }
 
}

2.DateUtils.java

package com.ican.yueban.utils;
 
import java.text.ParseException;
 
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
 
public class DateUtils {
  private static String startDay = GlobalConstant.START_DAY;// 开学日期
  private static String endDay = GlobalConstant.END_DAY;// 放假日期
 
  /**
   * 获取当前时间是第几节课，只限8-16点之间,其他时间默认1，2节课。
   * 
   * @return
   */
  public static int getNowCourse() {
    SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");// 设置日期格式
    String nowDate = df.format(new Date());
    if (nowDate.startsWith("08") || nowDate.startsWith("09")) {
      return 1;// 12节课。
    } else if (nowDate.startsWith("10") || nowDate.startsWith("11")) {
      return 2;// 34节课，以此类推。
    } else if (nowDate.startsWith("12") || nowDate.startsWith("13")
        || nowDate.startsWith("14")) {
      return 3;
    } else if (nowDate.startsWith("15") || nowDate.startsWith("16")) {
      return 4;
    } else {
      return 1;
    }
  }
 
  /**
   * 获取当前时间是第几周
   * 
   * @return
   */
  public static int getWeek() {
    int days = 0;
    int nowWeek = 0;
    try {
      SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");// 设置日期格式
      String nowDate = df.format(new Date());
      int nowDaysBetween = daysBetween(startDay, nowDate) + 1;
      days = daysBetween(startDay, endDay);
      int x = nowDaysBetween % 7;
      if (x == 0) {
        nowWeek = nowDaysBetween / 7;
      } else {
        nowWeek = nowDaysBetween / 7 + 1;
      }
 
    } catch (ParseException e) {
      System.out.println("输入的日期不合法，解析日期失败");
      e.printStackTrace();
    }
    return nowWeek;
  }
 
  /**
   * 获取当前时间是星期几
   * 
   * @return
   */
  public static int getWeekDay() {
    Calendar cal = Calendar.getInstance();
    cal.setTime(new Date());
    if (cal.get(Calendar.DAY_OF_WEEK) - 1 == 0) {
      return 7;
    }
    return cal.get(Calendar.DAY_OF_WEEK) - 1;
  }
 
  /**
   * 计算两个String类型日期之间的天数
   * 
   * @param startDay
   * @param endDay
   * @return
   * @throws ParseException
   */
  public static int daysBetween(String startDay, String endDay)
      throws ParseException {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    Calendar cal = Calendar.getInstance();
    cal.setTime(sdf.parse(startDay));
    long time1 = cal.getTimeInMillis();
    cal.setTime(sdf.parse(endDay));
    long time2 = cal.getTimeInMillis();
    long between_days = (time2 - time1) / (1000 * 3600 * 24);
 
    return Integer.parseInt(String.valueOf(between_days));
  }
 
  /**
   * 以yyyy-MM-dd HH:mm:ss格式返回String类型系统时间
   * 
   * @return
   */
  public static String getNowDate() {
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 设置日期格式
    return df.format(new Date());
  }
 
}

3.GlobalConstant.java  

package com.ican.yueban.utils;
 
/**
 * 本系统所有常量定义
 * 
 * @author 宋开宗
 * 
 */
public interface GlobalConstant {
  public static final String START_DAY = "2016-02-29";
  public static final String END_DAY = "2016-07-10";
  public static final String INDEX_URL = "http://jwgl2.ujn.edu.cn";// 济大教务系统首页
  public static final String SECRETCODE_URL = "http://jwgl2.ujn.edu.cn/CheckCode.aspx";// 验证码页面
  public static final String LOGIN_URL = "http://jwgl2.ujn.edu.cn/default2.aspx";// 济大教务系统登录页
  public static final String MAIN_URL = "http://jwgl2.ujn.edu.cn/xs_main.aspx?xh=";// 济大教务系统主页，菜单页面
  public static final String QUERY_CLASSROOM_URL = "http://jwgl2.ujn.edu.cn/xxjsjy.aspx?xh=";// 济大查询空教室链接
  public static final String QUERY_CLASSROOM_GNMKDM = "&gnmkdm=N121611";// 济大查询空教室gnmkdm
  public static final String QUERY_STU_COURSE_URL = "http://jwgl2.ujn.edu.cn/xskbcx.aspx?xh=";// 济大查询个人课表链接
  public static final String QUERY_STU_COURSE_GNMKDM = "&gnmkdm=N121603";// 济大查询个人课表gnmkdm
  public static final String QUERY_STU_GRADE_URL = "http://jwgl2.ujn.edu.cn/xscjcx.aspx?xh=";// 济大查询个人成绩链接
  public static final String QUERY_STU_GRADE_GNMKDM = "&gnmkdm=N121605";// 济大查询个人成绩gnmkdm
  public static final String IDENTITY_STU = "学生";// 身份：学生
  public static final String XIXIAOQU = "1";// 济大西校区标志
  public static final String DONGXIAOQU = "2";// 济大东校区标志
  public static final String ZHANGQIUXIAOQU = "3";// 济大章丘校区标志
  public static final String CLASS1 = "'1'|'1','0','0','0','0','0','0','0','0'";// 1，2节
  public static final String CLASS2 = "'2'|'0','3','0','0','0','0','0','0','0'";// 3，4节
  public static final String CLASS3 = "'3'|'0','0','5','0','0','0','0','0','0'";// 5，6节
  public static final String CLASS4 = "'4'|'0','0','0','7','0','0','0','0','0'";// 7，8节
  public static final String CLASS5 = "'5'|'0','0','0','0','9','0','0','0','0'";// 8，10节
  public static final String CLASS6 = "'6'|'0','0','0','0','0','11','0','0','0'";// 11，12节
  public static final String CLASS7 = "'7'|'1','3','0','0','0','0','0','0','0'";// 上午
  public static final String CLASS8 = "'8'|'0','0','5','7','0','0','0','0','0'";// 下午
  public static final String CLASS9 = "'9'|'1','3','5','7','0','0','0','0','0'";// 白天
  public static final String CLASS10 = "'10'|'0','0','0','0','9','11','0','0','0'";// 晚上
  public static final String CLASS11 = "'11'|'1','3','5','7','9','11','0','0','0'";// 全天
  public static final String BTN_XUEQI = "btn_xq";// 学期成绩
  public static final String BTN_XUENIAN = "btn_xn";// 学年成绩
  public static final String BTN_LINIAN = "btn_zcj";// 历年成绩
  public static final String UNIVERSITY_CODE_UJN = "00001";// 济南大学标识代码
  public static final String USER_STATE_N = "1";// 未认证
  public static final String USER_STATE_Y = "2";// 认证通过
  public static final String COMMENT_TYPE_NEWTHINGS = "1";// 评论类型1：新鲜事
  public static final String COMMENT_TYPE_INTEREST = "2";// 评论类型2：兴趣活动
}

4.IOUtils.java 

package com.ican.yueban.utils;
 
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
 
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
 
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.jsoup.Jsoup;
 
public class IOUtils {
  /**
   * 指定编码格式 ，把输入流转化为字符串
   * 
   * @param is
   * @return
   * @throws IOException
   */
  public static String getHtml(InputStream is, String encoding)
      throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    int len = 0;
    while ((len = is.read(buffer)) != -1) {
      bos.write(buffer, 0, len);
    }
    is.close();
    return new String(bos.toByteArray(), encoding);
  }
 
  /**
   * 下载图片
   * 
   * @param urlString
   * @param filename
   * @param savePath
   * @throws Exception
   */
  public static void download(String urlString, String filename,
      String savePath) throws Exception {
    // 构造URL
    URL url = new URL(urlString);
    // 打开连接
    URLConnection con = url.openConnection();
    // 设置请求超时为5s
    con.setConnectTimeout(5 * 1000);
    // 输入流
    InputStream is = con.getInputStream();
 
    // 1K的数据缓冲
    byte[] bs = new byte[1024];
    // 读取到的数据长度
    int len;
    // 输出的文件流
    File sf = new File(savePath);
    if (!sf.exists()) {
      sf.mkdirs();
    }
    OutputStream os = new FileOutputStream(sf.getPath() + "\\" + filename);
    // 开始读取
    while ((len = is.read(bs)) != -1) {
      os.write(bs, 0, len);
    }
    // 完毕，关闭所有链接
    os.close();
    is.close();
  }
 
  /**
   * 图片裁剪工具类
   * 
   * @param src
   * @param dest
   * @param x
   * @param y
   * @param w
   * @param h
   * @throws IOException
   */
  public static void cutImage(String src, String dest, int x, int y, int w,
      int h) throws IOException {
    Iterator iterator = ImageIO.getImageReadersByFormatName("jpg");
    ImageReader reader = (ImageReader) iterator.next();
    InputStream in = new FileInputStream(src);
    ImageInputStream iis = ImageIO.createImageInputStream(in);
    reader.setInput(iis, true);
    ImageReadParam param = reader.getDefaultReadParam();
    Rectangle rect = new Rectangle(x, y, w, h);
    param.setSourceRegion(rect);
    BufferedImage bi = reader.read(0, param);
    ImageIO.write(bi, "jpg", new File(dest));
    in.close();
 
  }
 
  /**
   * 判断字符编码集
   * 
   * @param str
   * @return
   */
  public static String getEncoding(String str) {
    String encode = "GB2312";
    try {
      if (str.equals(new String(str.getBytes(encode), encode))) {
        String s = encode;
        return s;
      }
    } catch (Exception exception) {
    }
    encode = "ISO-8859-1";
    try {
      if (str.equals(new String(str.getBytes(encode), encode))) {
        String s1 = encode;
        return s1;
      }
    } catch (Exception exception1) {
    }
    encode = "UTF-8";
    try {
      if (str.equals(new String(str.getBytes(encode), encode))) {
        String s2 = encode;
        return s2;
      }
    } catch (Exception exception2) {
    }
    encode = "GBK";
    try {
      if (str.equals(new String(str.getBytes(encode), encode))) {
        String s3 = encode;
        return s3;
      }
    } catch (Exception exception3) {
    }
    return "未知";
  }
 
  /**
   * 把输入流转换成图片---》获取验证码
   * 
   * @param is
   * @param filename
   * @param savePath
   * @throws Exception
   */
  public static void getSecret(InputStream is, String filename,
      String savePath) throws Exception {
    // 1K的数据缓冲
    byte[] bs = new byte[1024];
    // 读取到的数据长度
    int len;
    // 输出的文件流
    File sf = new File(savePath);
    if (!sf.exists()) {
      sf.mkdirs();
    }
    OutputStream os = new FileOutputStream(sf.getPath() + "\\" + filename);
    // 开始读取
    while ((len = is.read(bs)) != -1) {
      os.write(bs, 0, len);
    }
    // 完毕，关闭所有链接
    os.close();
    is.close();
  }
 
  /**
   * 获取隐藏字段的__VIEWSTATE值
   * 
   * @param url
   * @param cookie
   * @param referer
   * @return
   * @throws UnsupportedOperationException
   * @throws ClientProtocolException
   * @throws IOException
   */
  public static String getViewState(String url, String cookie, String referer)
      throws UnsupportedOperationException, ClientProtocolException,
      IOException {
    CloseableHttpClient client = HttpClients.createDefault();
    HttpGet getViewState = new HttpGet(url);
    getViewState.setHeader("Cookie", cookie);
    getViewState.setHeader("Referer", referer);// 设置头信息
    String s = IOUtils.getHtml(client.execute(getViewState).getEntity()
        .getContent(), "GB2312");
    String viewstate = Jsoup.parse(s).select("input[name=__VIEWSTATE]")
        .val();
    client.close();
    return viewstate;
  }
}

5. ParseUtils.java

package com.ican.yueban.utils;
 
public class ParseUtils {
  /**
   * 获取课程节次对应的字符串
   * @param course
   * @return
   */
  public static String parseWeek(String course) {
    String sjd="";
    int nowCourse = Integer.parseInt(course);
    switch (nowCourse) {
    case 1:
      sjd=GlobalConstant.CLASS1;
      break;
    case 2:
      sjd=GlobalConstant.CLASS2;
      break;
    case 3:
      sjd=GlobalConstant.CLASS3;
      break;
    case 4:
      sjd=GlobalConstant.CLASS4;
      break;
    case 5:
      sjd=GlobalConstant.CLASS5;
      break;
    case 6:
      sjd=GlobalConstant.CLASS6;
      break;
    case 7:
      sjd=GlobalConstant.CLASS7;
      break;
    case 8:
      sjd=GlobalConstant.CLASS8;
      break;
    case 9:
      sjd=GlobalConstant.CLASS9;
      break;
    case 10:
      sjd=GlobalConstant.CLASS10;
      break;
    case 11:
      sjd=GlobalConstant.CLASS11;
      break;
    default:
      sjd=GlobalConstant.CLASS1;
      break;
    }
 
    return sjd;
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助。