我尝试使用 jsoup 将以下 html 解析为 Java 中的对象。
我正在尝试遍历元素并将所有“Class”提取为对象以生成时间表数据。每个“类(class)”都有时间、地点、讲师和描述等等，但这不是问题。
所有元素都属于tt_details类。每一天都没有特定的父子关系，但是我可以使用 Elements dayNames = content.getElementsByClass("tt_day"); 提取涉及的日期
每天可以有不同数量的“类(class)”，因为您可以看到星期一有 3 个“类(class)”而星期二有，因此正常的循环结构不起作用。我怎样才能实现这个目标？
<div class='tt_details'>
<div class='tt_day'>Mon</div>
</div>
<div class='tt_details'>
<div class='tt_timeslot'>11:00 - 13:00
<div class='tt_day_small'> (Mon)</div>
</div>
<div class='tt_detail'>Internet of Things<br/>E1010 - MAC Lab <br/></div>
<div class='tt_lecturer'>Loftus, M</div>
</div>
<div class='tt_details'>
<div class='tt_timeslot'>13:00 - 14:00
<div class='tt_day_small'> (Mon)</div>
</div>
<div class='tt_detail'>Computer Systems & Networking<br/>A0004 - Tiered Lecture Theatre (132) <br/></div>
<div class='tt_lecturer'>Lang, D</div>
</div>
<div class='tt_details'>
<div class='tt_timeslot'>16:00 - 18:00
<div class='tt_day_small'> (Mon)</div>
</div>
<div class='tt_detail'>Intro.to Programming L8<br/>D2005 - Computer Laboratory (32) <br/></div>
<div class='tt_lecturer'>Kinsella,V</div>
</div>
<div class='tt_details'>
<div class='tt_day'>Tue</div>
</div>
<div class='tt_details'>
<div class='tt_timeslot'>09:00 - 10:00
<div class='tt_day_small'> (Tue)</div>
</div>
<div class='tt_detail'>Mathematics 2<br/>A0004 - Tiered Lecture Theatre (132) <br/></div>
<div class='tt_lecturer'>O'Regan,D</div>
</div>
<div class='tt_details'>
<div class='tt_timeslot'>10:00 - 11:00
<div class='tt_day_small'> (Tue)</div>
</div>
<div class='tt_detail'>Mathematics 2<br/>E0017 - Tiered Classroom (106) <br/></div>
<div class='tt_lecturer'>O'Regan,D</div>
</div>
<div class='tt_details'>
<div class='tt_timeslot'>11:00 - 12:00
<div class='tt_day_small'> (Tue)</div>
</div>
<div class='tt_detail'>Intro to Programming<br/>A0006 - Tiered Lecture Theatre (152) <br/></div>
<div class='tt_lecturer'>Kinsella,V</div>
</div>
<div class='tt_details'>
<div class='tt_timeslot'>16:00 - 17:00
<div class='tt_day_small'> (Tue)</div>
</div>
<div class='tt_detail'>Computer Systems & Networking<br/>A0006 - Tiered Lecture Theatre (152) <br/></div>
<div class='tt_lecturer'>Lang, D</div>
</div>
最佳答案
这样的事情可能会有所帮助:
String html = ""
+"<div class='tt_details'>"
+" <div class='tt_day'>Mon</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_timeslot'>11:00 - 13:00"
+" <div class='tt_day_small'> (Mon)</div>"
+" </div>"
+" <div class='tt_detail'>Internet of Things<br/>E1010 - MAC Lab <br/></div>"
+" <div class='tt_lecturer'>Loftus, M</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_timeslot'>13:00 - 14:00"
+" <div class='tt_day_small'> (Mon)</div>"
+" </div>"
+" <div class='tt_detail'>Computer Systems & Networking<br/>A0004 - Tiered Lecture Theatre (132) <br/></div>"
+" <div class='tt_lecturer'>Lang, D</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_timeslot'>16:00 - 18:00"
+" <div class='tt_day_small'> (Mon)</div>"
+" </div>"
+" <div class='tt_detail'>Intro.to Programming L8<br/>D2005 - Computer Laboratory (32) <br/></div>"
+" <div class='tt_lecturer'>Kinsella,V</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_day'>Tue</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_timeslot'>09:00 - 10:00"
+" <div class='tt_day_small'> (Tue)</div>"
+" </div>"
+" <div class='tt_detail'>Mathematics 2<br/>A0004 - Tiered Lecture Theatre (132) <br/></div>"
+" <div class='tt_lecturer'>O'Regan,D</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_timeslot'>10:00 - 11:00"
+" <div class='tt_day_small'> (Tue)</div>"
+" </div>"
+" <div class='tt_detail'>Mathematics 2<br/>E0017 - Tiered Classroom (106) <br/></div>"
+" <div class='tt_lecturer'>O'Regan,D</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_timeslot'>11:00 - 12:00"
+" <div class='tt_day_small'> (Tue)</div>"
+" </div>"
+" <div class='tt_detail'>Intro to Programming<br/>A0006 - Tiered Lecture Theatre (152) <br/></div>"
+" <div class='tt_lecturer'>Kinsella,V</div>"
+"</div>"
+"<div class='tt_details'>"
+" <div class='tt_timeslot'>16:00 - 17:00"
+" <div class='tt_day_small'> (Tue)</div>"
+" </div>"
+" <div class='tt_detail'>Computer Systems & Networking<br/>A0006 - Tiered Lecture Theatre (152) <br/></div>"
+" <div class='tt_lecturer'>Lang, D</div>"
+"</div>"
;
Document doc = Jsoup.parse(html);
Elements courseEls = doc.select("div.tt_details:not(:has(div.tt_day))");
class Course{
public Course(String day, String time, String lecturer, String subject) {
super();
this.day = day;
this.time = time;
this.lecturer = lecturer;
this.subject = subject;
}
public String day;
public String time;
public String lecturer;
public String subject;
public String toString(){
return day + " : "+ time +" : "+ lecturer + " : "+ subject;
}
}
Map<String,List<Course>> coursesByDay = new HashMap<>();
for (Element courseEl : courseEls){
Element timeSlotEl = courseEl.select(".tt_timeslot").first();
String timeSlotStr = timeSlotEl.ownText();
String dayStr = timeSlotEl.select(".tt_day_small").first().text().trim().replace("(", "").replace(")", "");
String detailStr = courseEl.select(".tt_detail").first().text();
String lecturerStr = courseEl.select(".tt_lecturer").first().text();
Course course = new Course(dayStr, timeSlotStr, lecturerStr, detailStr);
List<Course> courses = coursesByDay.get(dayStr);
if (courses == null){
courses = new ArrayList<>();
coursesByDay.put(dayStr, courses);
}
courses.add(course);
}
//get all courses on Tue
List<Course> courses = coursesByDay.get("Tue");
for (Course c : courses){
System.out.println(c);
}
这将创建一张包含每日类(class)的 map 。因此， map 键是日期，它包含类(class)对象的列表。
对此的一些评论:
- 我使用自定义对象来保存类(class)信息
- 我使用选择器
div.tt_details:not(:has(div.tt_day))仅获取类(class) div，而忽略了当天的 div。这是可能的，因为有关当天的信息在类(class) div 中重复。 - CSS 选择器用于获取详细信息。
- 请注意 ownText() 和 text() 之间的区别。这用于仅获取没有日期的时间信息。
- map 会动态填充其内容。
关于java - 将 HTML 解析为对象，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35322869/