blocks|key|632388|text|你在正确的轨道上。现在您只需要提取所需的组，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|632389|final+Pattern+pattern+=+Pattern.compile("<tag>(.%2B?)</tag>",+Pattern.DOTALL);
final+Matcher+matcher+=+pattern.matcher("<tag>String+I+want+to+extract</tag>");
matcher.find();
System.out.println(matcher.group(1));+//+Prints+String+I+want+to+extract|code-block|syntax|javascript|632390|如果您想提取多个匹配项，请尝试以下操作：|632391|public+static+void+main(String[]+args)+{
++++final+String+str+=+"<tag>apple</tag>hello<tag>orange</tag><tag>pear</tag>";
++++System.out.println(Arrays.toString(getTagValues(str).toArray()));+//+Prints+[apple,+orange,+pear]
}

private+static+final+Pattern+TAG_REGEX+=+Pattern.compile("<tag>(.%2B?)</tag>",+Pattern.DOTALL);

private+static+List<String>+getTagValues(final+String+str)+{
++++final+List<String>+tagValues+=+new+ArrayList<String>();
++++final+Matcher+matcher+=+TAG_REGEX.matcher(str);
++++while+(matcher.find())+{
++++++++tagValues.add(matcher.group(1));
++++}
++++return+tagValues;
}|632392|然而，我同意正则表达式在这里不是最好的答案。我会使用XPath来查找我感兴趣的元素。有关详细信息，请参阅The+Java+XPath+API。|offset|length|632393|entityMap|0|LINK|mutability|MUTABLE|url|http://www.ibm.com/developerworks/library/x-javaxpathapi/index.html#listing1^0|0|0|0|0|1G|I|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

You're on the right track. Now you just need to extract the desired group, as follows:

<pre><code>final Pattern pattern = Pattern.compile("&lt;tag&gt;(.+?)&lt;/tag&gt;", Pattern.DOTALL);
final Matcher matcher = pattern.matcher("&lt;tag&gt;String I want to extract&lt;/tag&gt;");
matcher.find();
System.out.println(matcher.group(1)); // Prints String I want to extract
</code></pre>

If you want to extract multiple hits, try this:

<pre><code>public static void main(String[] args) {
 final String str = "&lt;tag&gt;apple&lt;/tag&gt;&lt;b&gt;hello&lt;/b&gt;&lt;tag&gt;orange&lt;/tag&gt;&lt;tag&gt;pear&lt;/tag&gt;";
 System.out.println(Arrays.toString(getTagValues(str).toArray())); // Prints [apple, orange, pear]
}

private static final Pattern TAG_REGEX = Pattern.compile("&lt;tag&gt;(.+?)&lt;/tag&gt;", Pattern.DOTALL);

private static List&lt;String&gt; getTagValues(final String str) {
 final List&lt;String&gt; tagValues = new ArrayList&lt;String&gt;();
 final Matcher matcher = TAG_REGEX.matcher(str);
 while (matcher.find()) {
 tagValues.add(matcher.group(1));
 }
 return tagValues;
}
</code></pre>

However, I agree that regular expressions are not the best answer here. I'd use XPath to find elements I'm interested in. See <a href="http://www.ibm.com/developerworks/library/x-javaxpathapi/index.html#listing1" rel="noreferrer">The Java XPath API</a> for more info.

blocks|key|848838|text|我在回复前面加上了“您不应该使用正则表达式来解析XML+--它只会导致不能正常工作的边缘情况，并且在您试图修复它的同时还会导致一个复杂度不断增加的正则表达式。”|type|unstyled|depth|inlineStyleRanges|entityRanges|data|848839|也就是说，您需要通过匹配字符串并获取您想要的组来继续：|848840|if+(m.matches())
{
+++String+result+=+m.group(1);
+++//+do+something+with+result
}|code-block|syntax|javascript|848841|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I prefix this reply with "you shouldn't use a regular expression to parse XML -- it's only going to result in edge cases that don't work right, and a forever-increasing-in-complexity regex while you try to fix it."

That being said, you need to proceed by matching the string and grabbing the group you want:

<pre><code>if (m.matches())
{
 String result = m.group(1);
 // do something with result
}
</code></pre>

blocks|key|848845|text|++++final+Pattern+pattern+=+Pattern.compile("tag\\](.%2B?)\\[/tag");
++++final+Matcher+matcher+=+pattern.matcher("[tag]String+I+want+to+extract[/tag]");
++++matcher.find();
++++System.out.println(matcher.group(1));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|848846|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> final Pattern pattern = Pattern.compile("tag\\](.+?)\\[/tag");
 final Matcher matcher = pattern.matcher("[tag]String I want to extract[/tag]");
 matcher.find();
 System.out.println(matcher.group(1));
</code></pre>

blocks|key|632450|text|用于查找标签、属性和值的通用、更简单和有点原始的方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|632451|++++Pattern+pattern+=+Pattern.compile("<(\\w%2B)(+%2B.%2B)*>((.*))</\\1>");
++++System.out.println(pattern.matcher("<asd>+TEST</asd>").find());
++++System.out.println(pattern.matcher("<asd+TEST</asd>").find());
++++System.out.println(pattern.matcher("<asd+attr='3'>+TEST</asd>").find());
++++System.out.println(pattern.matcher("<asd>+<x>TEST<x>asd>").find());
++++System.out.println("-------");
++++Matcher+matcher+=+pattern.matcher("<as+x>+TEST</as>");
++++if+(matcher.find())+{
++++++++for+(int+i+=+0;+i+<=+matcher.groupCount();+i%2B%2B)+{
++++++++++++System.out.println(i+%2B+":"+%2B+matcher.group(i));
++++++++}
++++}|code-block|syntax|javascript|632452|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A generic,simpler and a bit primitive approach to find tag, attribute and value

<pre><code> Pattern pattern = Pattern.compile("&lt;(\\w+)( +.+)*&gt;((.*))&lt;/\\1&gt;");
 System.out.println(pattern.matcher("&lt;asd&gt; TEST&lt;/asd&gt;").find());
 System.out.println(pattern.matcher("&lt;asd TEST&lt;/asd&gt;").find());
 System.out.println(pattern.matcher("&lt;asd attr='3'&gt; TEST&lt;/asd&gt;").find());
 System.out.println(pattern.matcher("&lt;asd&gt; &lt;x&gt;TEST&lt;x&gt;asd&gt;").find());
 System.out.println("-------");
 Matcher matcher = pattern.matcher("&lt;as x&gt; TEST&lt;/as&gt;");
 if (matcher.find()) {
 for (int i = 0; i &lt;= matcher.groupCount(); i++) {
 System.out.println(i + ":" + matcher.group(i));
 }
 }
</code></pre>

blocks|key|632471|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|632472|Pattern+p+=+Pattern.compile(?<=\\<(any_tag)\\>)(\\s*.*\\s*)(?=\\<\\/(any_tag)\\>);
Matcher+m+=+p.matcher(anyString);|code-block|syntax|javascript|632473|例如：|632474|String+str+=+"<TR>+<TD>1Q+Ene</TD>+<TD>3.08%25</TD>+</TR>";
Pattern+p+=+Pattern.compile("(?<=\\<TD\\>)(\\s*.*\\s*)(?=\\<\\/TD\\>)");
Matcher+m+=+p.matcher(str);
while(m.find()){
+++Log.e("Regex","+Regex+result:+"+%2B+m.group())+++++++
}|632475|输出：|632476|10烯|632477|3.08%25|632478|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Try this:

<pre><code>Pattern p = Pattern.compile(?&lt;=\\&lt;(any_tag)\\&gt;)(\\s*.*\\s*)(?=\\&lt;\\/(any_tag)\\&gt;);
Matcher m = p.matcher(anyString);
</code></pre>

For example: 

<pre><code>String str = "&lt;TR&gt; &lt;TD&gt;1Q Ene&lt;/TD&gt; &lt;TD&gt;3.08%&lt;/TD&gt; &lt;/TR&gt;";
Pattern p = Pattern.compile("(?&lt;=\\&lt;TD\\&gt;)(\\s*.*\\s*)(?=\\&lt;\\/TD\\&gt;)");
Matcher m = p.matcher(str);
while(m.find()){
 Log.e("Regex"," Regex result: " + m.group()) 
}
</code></pre>

Output:

10 Ene

3.08%

blocks|key|632480|text|++++String+s+=+"<G>Test</G><C>Test1</C>";

++++String+pattern+="\\<(.%2B)\\>([%5E\\<\\>]%2B)\\<\\/\\1\\>";

+++++++int+count+=+0;

++++++++Pattern+p+=+Pattern.compile(pattern);
++++++++Matcher+m+=++p.matcher(s);
++++++++while(m.find())
++++++++{
++++++++++++System.out.println(m.group(2));
++++++++++++count%2B%2B;
++++++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|632481|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> String s = "&lt;B&gt;&lt;G&gt;Test&lt;/G&gt;&lt;/B&gt;&lt;C&gt;Test1&lt;/C&gt;";

 String pattern ="\\&lt;(.+)\\&gt;([^\\&lt;\\&gt;]+)\\&lt;\\/\\1\\&gt;";

 int count = 0;

 Pattern p = Pattern.compile(pattern);
 Matcher m = p.matcher(s);
 while(m.find())
 {
 System.out.println(m.group(2));
 count++;
 }
</code></pre>

I have a file with some custom tags and I'd like to write a regular expression to extract the string between the tags. For example if my tag is:

<pre class="lang-none prettyprint-override"><code>[customtag]String I want to extract[/customtag]
</code></pre>

How would I write a regular expression to extract only the string between the tags. This code seems like a step in the right direction:

<pre><code>Pattern p = Pattern.compile("[customtag](.+?)[/customtag]");
Matcher m = p.matcher("[customtag]String I want to extract[/customtag]");
</code></pre>

Not sure what to do next. Any ideas? Thanks.

Java regex to extract text between tags

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我有一个带有一些自定义标记的文件，我想编写一个正则表达式来提取标记之间的字符串。例如，如果我的标签是：[customtag]String I want to extract[/customtag]如何编写一个正则表达式来仅提取标记之间的字符串。这段代码似乎是朝着正确的方向迈出的一步：Pattern p = Patter...

问Java regex用于提取标记之间的文本
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问Java regex用于提取标记之间的文本EN