从给定字符串中删除 HTML 标签的程序

给定一个包含一些 HTML 标签的字符串str ，任务是删除给定字符串str 中存在的所有标签。
例子：

Input: str = “

Geeks for Geeks

” 
Output: Geeks for Geeks
Input: str = “GFG” 
Output: GFG 
 

做法：思路是用正则表达式来解决这个问题。可以按照以下步骤计算结果字符串：

1. 获取字符串。
2. 由于每个 HTML 标签都包含在尖括号 ( <> ) 中。因此，在正则表达式中使用replaceAll()函数将每个以“<”开头并以“>”结尾的子字符串替换为空字符串。
3. 该函数用作：

String str;
str.replaceAll("\\", "");

下面是上述方法的实现：

C++

// C++ program for the above approach
#include 
#include 
using namespace std;
 
// Function to remove the HTML tags
// from the given string
void RemoveHTMLTags(string s)
{
  const regex pattern("\\<.*?\\>");
 
  // Use regex_replace function in regex
  // to erase every tags enclosed in <>
  s = regex_replace(s, pattern, "");
 
  // Print string after removing tags
  cout << s;
 
  return ;
}
 
// Driver Code
int main()
{
   
  // Given String
  string str = "
Geeks for Geeks
";
 
  // Function call to print the
  // HTML string after removing tags
  RemoveHTMLTags(str) ;
 
  return 0;
}
 
// This code is contributed by yuvraj_chandra

Java

// Java program for the above approach
 
class GFG {
 
    // Function to remove the HTML tags
    // from the given tags
    static void RemoveHTMLTags(String str)
    {
 
        // Use replaceAll function in regex
        // to erase every tags enclosed in <>
        str = str.replaceAll("\\<.*?\\>", "");
 
        // Print string after removing tags
        System.out.println(str);
    }
 
    // Driver Code
    public static void main(String[] args)
    {
        String str;
 
        // Given String
        str = "
Geeks for Geeks
";
 
        // Function call to print the
        // HTML string after removing tags
        RemoveHTMLTags(str);
    }
}

Python3

# Python3 program for the
# above approach
import re
 
# Function to remove the HTML tags
# from the given tags
def RemoveHTMLTags(strr):
     
    # Print string after removing tags
    print(re.compile(r'<[^>]+>').sub('', strr))
     
# Driver code
if __name__=='__main__':
     
    # Given String
    strr = "
Geeks for Geeks
"
     
    # Function call to print the HTML
    # string after removing tags
    RemoveHTMLTags(strr);
     
# This code is contributed by vikas_g

C#

// C# program for the above approach
using System;
 
class GFG{
 
// Function to remove the HTML tags
// from the given tags
static void RemoveHTMLTags(String str)
{
     
    // Use replaceAll function in regex
    // to erase every tags enclosed in <>
    // str = Regex.Replace(str, "<.*?>", String.Empty)
    System.Text.RegularExpressions.Regex rx =
    new System.Text.RegularExpressions.Regex("<[^>]*>");
     
    str = rx.Replace(str, "");
 
    // Print string after removing tags
    Console.WriteLine(str);
}
 
// Driver code
public static void Main(String []args)
{
    String str;
 
    // Given String
    str = "
Geeks for Geeks
";
 
    // Function call to print the
    // HTML string after removing tags
    RemoveHTMLTags(str);
}
}
 
// This code is contributed by vikas_g

输出：

Geeks for Geeks

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