I have a variable requestID which i have to replace with null value.

Can anyone help me with the suitable regex for below string patterns. Eg- requestID="DEABCD-1196745-000214557" requestID="0195789_ledabj_6156096"

CodePudding user response：

You could use [A-Z-a-z0-9] (?:[_-][A-Z-a-z0-9] ) :

List<String> inputs = Arrays.asList(new String[] { "DEABCD-1196745-000214557",
                                                   "0195789_ledabj_6156096",
                                                   "BANANAS" });
for (String input : inputs) {
    if (input.matches("[A-Z-a-z0-9] (?:[_-][A-Z-a-z0-9] ) ")) {
        System.out.println("MATCH: "   input);
    }
    else {
        System.out.println("NO MATCH: "   input);
    }
}

This prints:

MATCH: DEABCD-1196745-000214557
MATCH: 0195789_ledabj_6156096
NO MATCH: BANANAS

CodePudding user response：

Would /[\w|-] / cover what you need?

CodePudding user response：

you can try & test your Regex via online tools such as Regex101, Regexr

CodePudding user response：

This might help, try the following regex:

"([A-Z] -\\d -\\d |\\d _[a-z] _\\d )"

Regex in context and testbench:

public static void main(String[] args) {

    String requestID_1 = "DEABCD-1196745-000214557";
    String requestID_2 = "0195789_ledabj_6156096";

    Matcher matcher1 = Pattern.compile("([A-Z] -\\d -\\d |\\d _[a-z] _\\d )").matcher(requestID_1);

    if (matcher1.find()) {
        requestID_1 = null;
        System.out.println("Variable requestID_1 is set to: "   requestID_1);
    }

    Matcher matcher2 = Pattern.compile("([A-Z] -\\d -\\d |\\d _[a-z] _\\d )").matcher(requestID_2);

    if (matcher2.find()) {
        requestID_2 = null;
        System.out.println("Variable requestID_2 is set to: "   requestID_2);
    }
}

Output:

Variable requestID_1 is set to: null
Variable requestID_2 is set to: null