如何用Java中的空字符串替换á字符？

Question

I am parsing CSV file, there I encounter special characters like á .

String line = scanner.nextLine();

Can any one help me to remove á and corrupted characters from the string line. I tried the following

line.replaceAll("[^a-zA-Z0-9]+","");

but it replacing : , / [ ] symbols.

 inputStream = filePart.getInputStream();
 Scanner scanner = new Scanner(inputStream);
 while (scanner.hasNextLine()) {
     String line = scanner.nextLine();
     System.out.println("Line : " + line.trim());
     String[] fields = line.split(",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", -1);
     for (int i = fields.length - 1; i >= 0; i--) {
         System.out.println(i + " " + fields[i].replaceAll("[á]", ""));
     }

Answer 1

Why not just replace a positive character class containing the accented character(s):

String input = "hablá";
input = input.replaceAll("[á]", "");
System.out.println(input);

Or

input = input.replaceAll("[\\u00e1]", "");

Output:

habl

Demo

Answer 2

Add the characters you don't want stripped out to your regex pattern match.

eg

[^a-zA-Z0-9$\/\]\[\:\,]+

Will match az, AZ, 0-9, /, \\, ], [, :, ,, Don't forget to escape special characters in the pattern with a \\

Also you can use https://regex101.com/ to check the validity of any regex you create.

Answer 3

You can use the replace method as shown below:

line = line.replace("á","");

Demo