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

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

社区

活动

资源

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

社区

活动

资源

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