有两种不同类型的维基文本超链接:
[[stack]]
[[heap (memory region)|heap]]
我想删除超链接但保留文本:
stack
heap
目前，我正在运行两个阶段，使用两种不同的正则表达式:
public class LinkRemover
{
private static final Pattern
renamingLinks = Pattern.compile("\\[\\[[^\\]]+?\\|(.+?)\\]\\]");
private static final Pattern
simpleLinks = Pattern.compile("\\[\\[(.+?)\\]\\]");
public static String removeLinks(String input)
{
String temp = renamingLinks.matcher(input).replaceAll("$1");
return simpleLinks.matcher(temp).replaceAll("$1");
}
}
有没有一种方法可以将两个正则表达式“融合”为一个，从而达到相同的结果？
如果您想检查建议的解决方案的正确性，这里有一个简单的测试类:
public class LinkRemoverTest
{
@Test
public void test()
{
String input = "A sheep's [[wool]] is the most widely used animal fiber, and is usually harvested by [[Sheep shearing|shearing]].";
String expected = "A sheep's wool is the most widely used animal fiber, and is usually harvested by shearing.";
String output = LinkRemover.removeLinks(input);
assertEquals(expected, output);
}
}
最佳答案
您可以使该部分直到管道可选:
\\[\\[(?:[^\\]|]*\\|)?([^\\]]+)\\]\\]
为了确保您始终位于方括号之间，请使用字符类。
fiddle (单击Java按钮)
图案详细信息:
\\[\\[ # literals opening square brackets
(?: # open a non-capturing group
[^\\]|]* # zero or more characters that are not a ] or a |
\\| # literal |
)? # make the group optional
([^\\]]+) # capture all until the closing square bracket
\\]\\]
关于java - 通过正则表达式删除维基文本超链接，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29918472/