使用jsoup解析html并删除标记块
[英]Parse html with jsoup and remove the tag block
问题描述
I want to remove everything between a tag. 
我想删除标签之间的所有内容。 An example input may be 输入的示例可以是
Input: 输入：
<body>
start
<div>
delete from below
<div class="XYZ">
first div having this class
<div>
waste
</div>
<div class="XYZ">
second div having this class
</div>
waste
</div>
delete till above
</div>
<div>
this will also remain
</div>
end
</body>
The output will be: 输出将是：
<body>
start
<div>
delete from below
delete till above
</div>
<div>
this will also remain
</div>
end
</body>
Basically, I have to remove the entire block for the first occurrence of <div class="XYZ"> 基本上，我必须删除第一次出现<div class="XYZ">的整个块
Thanks, 谢谢，
4 个解决方案
解决方案1
15 已采纳 2013-04-03 19:18:12
You better iterate over all elements found. 您最好迭代找到的所有元素。 so you can be shure that 所以你可以这样
- a.) all elements are removed and a。）删除所有元素
- b.) there's nothing done if there's no element. b。）如果没有元素，那就什么也没做。
Example: 例：
Document doc = ...
for( Element element : doc.select("div.XYZ") )
{
element.remove();
}
Edit: 编辑：
( An addition to my comment ) （我的评论的补充）
Don't use exception handling when a simple null- / range check is enough here: 在此处进行简单的零/范围检查时，请勿使用异常处理：
doc.select("div.XYZ").first().remove();
instead: 代替：
Elements divs = doc.select("div.XYZ");
if( !divs.isEmpty() )
{
/*
* Here it's safe to call 'first()' since there at least one element.
*/
}
解决方案2
1 2013-04-03 19:12:04
Try this code : 试试这段代码：
String data = null;
BufferedReader br = new BufferedReader(new FileReader("e://XMLFile.xml"));
StringBuilder builder = new StringBuilder();
while ((data = br.readLine()) != null) {
builder.append(data);
}
System.out.println(builder);
String replaceAll = builder.toString().replaceAll("<div class=\"XYZ\".+?</div>", "");
System.out.println(replaceAll);
I have read the input XML from a file and stored it in a StringBuilder object by reading it line by line, and then replaced the entire 我已经从文件中读取了输入XML，并通过逐行读取将其存储在StringBuilder对象中，然后替换为整个 tag will empty string. 标签将为空字符串。
解决方案3
1 2017-10-19 10:34:14
This may help you. 这可能对你有所帮助。
String selectTags="div,li,p,ul,ol,span,table,tr,td,address,em";
/*selecting some specific tags */
Elements webContentElements = parsedDoc.select(selectTags);
String removeTags = "img,a,form";
/*Removing some tags from selected elements*/
webContentElements.select(removeTags).remove();
解决方案4
0 2013-04-05 18:25:39
I asked this problem yesterday and thanks to ollo's answer. 昨天我问了这个问题，感谢ollo的回答。 It was solved. 它解决了。 There is en extension of the above problem. 有上述问题的延伸。 I did not know if I have to start a new post or chain this one. 我不知道我是否必须开始一个新的帖子或链接这个。 So, in this confusion I am chaining it here.. Admins pls, pardon me if I had to make a separate post for this. 所以，在这种混乱中，我在这里链接它。管理员请，请原谅我，如果我必须为此单独发布一个帖子。
In the above problem, I have to remove a tag block with matching component. 在上面的问题中，我必须删除带有匹配组件的标记块。
The real scenario is: It should remove the tag block with matching component + remove <br /> surrounding it. 真实的情况是：它应该删除带有匹配组件的标签块+删除它周围的<br /> 。
Referring to the above example. 参考上面的例子。
<body>
start
<div>
delete from below
<br />
<br />
<div class="XYZ">
first div having this class
<div>
waste
</div>
<div class="XYZ">
second div having this class
</div>
waste
</div>
<br />
delete till above
</div>
<div>
this will also remain
</div>
end
</body>
should also give the same output: 还应该给出相同的输出：
<body>
start
<div>
delete from below
delete till above
</div>
<div>
this will also remain
</div>
end
</body>
Because it has <br /> above and below the html tag block to remove.... 因为它具有<br />上方和下方的HTML标记块以除去....
Just to re-iterate, I am using the solution given by ollo to match and remove the tag block. 为了重新迭代，我使用ollo给出的解决方案来匹配并删除标记块。
for( Element element : doc.select("div.XYZ") )
{
element.remove();
}
Thanks, Shekhar 谢谢，谢卡尔
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