模拟登录正方教务抓取成绩、课表、空教室代码,Java代码库,德仔网

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【Java】模拟登录正方教务抓取成绩、课表、空教室
作者:咏矽 / 发布于2016/4/6/ 720
Java实现模拟登录正方教务抓取成绩、课表、空教室，通过HttpClient来模拟浏览器请求，Jsoup解析网页内容。附带验证码分析。
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<NameValuePair> nameValuePairLogin = new ArrayList<NameValuePair>();// 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<NameValuePair> queryClassroomPair = new ArrayList<NameValuePair>();
        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<NameValuePair> queryGradePair = new ArrayList<NameValuePair>();
        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<td>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<NameValuePair> stuCoursePair = new ArrayList<NameValuePair>();
        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
    }
 
}



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());
    }
 
}



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. [文件] IOUtils.java ~ 5KB     下载(0)     
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?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;
    }
}



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;
    }
}
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