spring-cloud-alibaba-starters/spring-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/utils/StringUtils.java [358:370]:
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	public static String substringBetween(String str, String open, String close) {
		if (str == null || open == null || close == null) {
			return null;
		}
		int start = str.indexOf(open);
		if (start != INDEX_NOT_FOUND) {
			int end = str.indexOf(close, start + open.length());
			if (end != INDEX_NOT_FOUND) {
				return str.substring(start + open.length(), end);
			}
		}
		return null;
	}
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spring-cloud-alibaba-starters/spring-cloud-alibaba-commons/src/main/java/com/alibaba/cloud/commons/lang/StringUtils.java [358:370]:
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	public static String substringBetween(String str, String open, String close) {
		if (str == null || open == null || close == null) {
			return null;
		}
		int start = str.indexOf(open);
		if (start != INDEX_NOT_FOUND) {
			int end = str.indexOf(close, start + open.length());
			if (end != INDEX_NOT_FOUND) {
				return str.substring(start + open.length(), end);
			}
		}
		return null;
	}
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