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研究生：修正课表时间解析算法

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lensfrex 2 years ago
parent 2102a7ac18
commit de58d44232
Signed by: lensfrex
GPG Key ID: 0F69A0A2FBEE98A0
1 changed files with 75 additions and 44 deletions
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  1. 89
      mywust-core/src/main/java/cn/linghang/mywust/core/parser/graduate/GraduateCourseTableParser.java

89
mywust-core/src/main/java/cn/linghang/mywust/core/parser/graduate/GraduateCourseTableParser.java
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@ -16,9 +16,15 @@ import java.util.regex.Pattern;
public class GraduateCourseTableParser implements Parser<List<Course>> {
private static final Pattern COURSE_TABLE_REGEX = Pattern.compile("课程:(?<name>.*?)<br>班级:(?<class>.*?)<br>\\((?<classRoom>.*?)\\)<br>(?<week>.*?)<br>(?<section>.*?)<br>主讲教师:(?<teacher>.*?)<br>");
private static final Pattern COURSE_TABLE_REGEX = Pattern.compile("课程:(?<name>.*?)<br>班级:(?<class>.*?)<br>\\((?<classRoom>.*?)\\)<br>(?<week>.*?) (?<weekdaySection>.*?)<br>主讲教师:(?<teacher>.*?)<br>");
private static final Pattern WEEK_REGEX = Pattern.compile("(?<startWeek>\\d+)-(?<endWeek>\\d+)周.*?星期(?<weekDay>[一二三四五六七日天])");
private static final Pattern WEEK_REGEX = Pattern.compile("(?<startWeek>\\d+)-(?<endWeek>\\d+)周");
private static final Pattern WEEKDAY_SECTION_REGEX = Pattern.compile("星期(?<weekDay>[一二三四五六七日天])<br>(?<sectionText>([上下晚]\\d,?)+)");
private static final Pattern SECTION_REGEX = Pattern.compile("(?<dayTime>[上下晚])(?<section>\\d)");
private static final String courseGirdXpath = "//*[@id=\"DataGrid1\"]/tbody/tr/td[@rowspan]";
@Override
public List<Course> parse(String html) throws ParseException {
@ -28,15 +34,16 @@ public class GraduateCourseTableParser implements Parser<List<Course>> {
throw new ParseException("解析研究生课表失败：关键元素不存在...", html);
}
// 初步拿到所有的课程格子
Elements girds = table.getElementsByAttribute("rowspan");
String girdsHtml = girds.outerHtml();
List<Course> courses = new ArrayList<>(girds.size());
List<Course> courses = new ArrayList<>(42);
Course.CourseBuilder courseBuilder = Course.builder();
Elements courseGirds = table.selectXpath(courseGirdXpath);
for (Element courseGird : courseGirds) {
String girdHtml = courseGird.html();
// 正则提取每一段课程文本
Matcher matcher = COURSE_TABLE_REGEX.matcher(girdsHtml);
Matcher matcher = COURSE_TABLE_REGEX.matcher(girdHtml);
while (matcher.find()) {
String name = matcher.group("name");
courseBuilder.name(name);
@ -53,8 +60,9 @@ public class GraduateCourseTableParser implements Parser<List<Course>> {
String weekStr = matcher.group("week");
this.parseWeek(weekStr, courseBuilder);
String section = matcher.group("section");
this.fillCourseList(section, courseBuilder, courses);
this.parseWeekdaySectionAndFillCourse(matcher.group("weekdaySection"), courseBuilder, courses);
}
}
return courses;
@ -64,36 +72,48 @@ public class GraduateCourseTableParser implements Parser<List<Course>> {
* 解析周次信息文本
*
* @param weekText 周次文本，如“3-14周:连续周 星期三”
* @param builder Lesson的builder
* @param builder Course的builder
*/
private void parseWeek(String weekText, Course.CourseBuilder builder) {
Matcher matcher = WEEK_REGEX.matcher(weekText);
if (matcher.find()) {
String startWeek = matcher.group("startWeek");
String endWeek = matcher.group("endWeek");
String weekDay = matcher.group("weekDay");
builder.startWeek(Integer.parseInt(startWeek));
builder.endWeek(Integer.parseInt(endWeek));
builder.weekDay(Course.getWeekDayNumber(weekDay));
}
}
/**
* 解析节次，并将解析出来的完整的节次放入List中
* 解析时间并填充最后的解析结果
*
* @param sectionText 提取出来的节次文本，如“上1,上2,上3,上4,下1,下2”
* @param builder LessonImpl中的builder
* @param courses 存放Lesson的List
* @param timeText 时间字段，如 "星期五&lt;br&gt;上3,上4", "星期六&lt;br&gt;上1,上2,上3,上4"
* @param builder 已经解析好其他必要数据的courseBuilder
* @param courses 解析结果List
*/
private void fillCourseList(String sectionText, Course.CourseBuilder builder, List<Course> courses) {
String[] sections = sectionText.split(",");
for (int i = 0; i < sections.length / 2; i += 2) {
int startSection = this.getSection(sections[i]);
int endSection = this.getSection(sections[i + 1]);
private void parseWeekdaySectionAndFillCourse(String timeText, Course.CourseBuilder builder, List<Course> courses) {
Matcher timeMatcher = WEEKDAY_SECTION_REGEX.matcher(timeText);
// 解析星期和节次，一直匹配，匹配到一次就是一次连续课
while (timeMatcher.find()) {
// 解析星期
builder.weekDay(Course.getWeekDayNumber(timeMatcher.group("weekDay")));
// 解析节次
Matcher sectionMatcher = SECTION_REGEX.matcher(timeMatcher.group("sectionText"));
if (sectionMatcher.find()) {
int startSection = getSection(sectionMatcher);
// todo 这段可以稍微优化一下
// 一直匹配，最后的那个就是结束节次，如果第一次就不匹配的话就是单节课
int endSection = startSection;
while (sectionMatcher.find()) {
endSection = getSection(sectionMatcher);
}
builder.startSection(startSection);
builder.endSection(endSection);
}
courses.add(builder.build());
}
@ -102,20 +122,31 @@ public class GraduateCourseTableParser implements Parser<List<Course>> {
/**
* 将上1，下2，晚1这种相对的节次格式转换为相应的绝对节次
*
* @param time 类似于上1，下2，晚1这种相对的节次格式文本
* @param dateTime 上，下这种早上晚上的文本
* @param sectionText 1，2，3这种相对的节次数文本
* @return 相应的绝对节次
*/
private int getSection(String time) {
int i = time.charAt(1) - 48;
switch (time.charAt(0)) {
private int getSection(String dateTime, String sectionText) {
int section = Integer.parseInt(sectionText);
switch (dateTime.charAt(0)) {
case '上':
return i;
return section;
case '下':
return i + 4;
return section + 4;
case '晚':
return i + 8;
return section + 8;
default:
return 1;
}
}
/**
* 通过正则匹配器计算节次
*
* @param matcher 以及匹配好的matcher
* @return 相应的绝对节次
*/
private int getSection(Matcher matcher) {
return getSection(matcher.group("dayTime"), matcher.group("section"));
}
}

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