c# - C# 正则表达式替换表达式

Question

我有一个这样的字符串：“编程是我的热情，我喜欢程序”

现在我需要使用 Regex Replace 来更改它。每个包含表达式“程序”的单词都应切换为：

<a href="http://codeguru.pl" title="programming">programming</a>

任何帮助将不胜感激。

Answer 1

String.Replace是最好的选择。

var input = "programming is my passion, I love programs";
var replacefrom = "program";
var tobereplaced =@"<a href=""http://codeguru.pl"" title=""programming"">programming</a> is my passion";

var output = input.Replace(replacefrom, tobereplaced)

正则表达式替换

Regex regex = new Regex("program");
var outputRegex = regex.Replace(input, tobereplaced); // input, tobereplaced from above snipped

输出

<a href="http://codeguru.pl" title="programming">programming</a> is my passionming is my passion, I love <a href="http://codeguru.pl" title="programming">programming</a> is my passions

Answer 2

一条线就足够了：

new Regex(@"\b\w*program\w*\b").Replace("programming is my passion, I love programs", @"<a href=""http://codeguru.pl"" title=""programming"">programming</a>");

where\b\w*program\w*\b匹配任何包含program.

如果要根据匹配的单词更改链接的文本，请使用反向引用：

new Regex(@"(\b\w*program\w*\b)").Replace("programming is my passion, I love programs", @"<a href=""http://codeguru.pl"" title=""programming"">$1</a>");

此版本在模式周围添加括号，并使用$1（而不是硬编码字符串“ programming”）来引用匹配的单词。现在输出将是：

<a href="http://codeguru.pl" title="programming">programming</a> is my passion, I love <a href="http://codeguru.pl" title="programming">programs</a>

Answer 3

解决方案..

    Pattern pattern = Pattern.compile("(\\w+|\\W)");
    Matcher m = pattern.matcher("programming is my passion, I love programs");
    while (m.find())
    {
    Pattern pattern1 = Pattern.compile("(program)");
    Matcher m1 = pattern1.matcher(m.group());

    if(m1.find())
        System.out.print(m.group().replace(m.group(), "<a href="+"http://codeguru.pl"+" title="+"programming"+">programming</a>"));
    else
        System.out.print(m.group());
}

输出：

<a href=http://codeguru.pl title=programming>programming</a> is my passion, I love <a href=http://codeguru.pl title=programming>programming</a>