可以使用此正则表达式匹配指定的字符串模式

Received request with messageId:test, clientId:[\\w-]+ has been processed

Java语言的完整代码：

import java.util.regex.*;

public class Main {
    public static void main(String[] args) {
        // Your larger text
        String largerText = "Received request with messageId:test, clientId:7da6554c-e3ed-49ed-9a7f-f810f98ceb7f has been processed";

        // Define the regular expression pattern
        String pattern = "Received request with messageId:test, clientId:[\\w-]+ has been processed";

        // Create a Pattern object
        Pattern regex = Pattern.compile(pattern);

        // Create a Matcher object
        Matcher matcher = regex.matcher(largerText);

        // Check if a match was found
        if (matcher.find()) {
            String matchedText = matcher.group();
            System.out.println("Match found: " + matchedText);
        } else {
            System.out.println("No match found");
        }
    }
}

输出：

Match found: Received request with messageId:test, clientId:7da6554c-e3ed-49ed-9a7f-f810f98ceb7f has been processed

说明：
**pattern：**是正则表达式模式，用于查找UUID的固定部分“Received request with messageId：test，clientId：“，后跟一个或多个单词字符（\w）和连字符（-）。

我不使用正则表达式，而只查找消息前缀。

String message = "Some other text here.  Received request with messageId:test, clientId:7da6554c-e3ed-49ed-9a7f-f810f98ceb7f has been processed";

System.out.println(checkRequest(message) ? "Received" : "Unknown request");
         
        
static String MESSAGE_PREFIX = "Received request with messageId:test, clientId:";
public static boolean checkRequest(String text) {
    return text.indexOf(MESSAGE_PREFIX) >= 0;
}