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                ``` import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang3.StringUtils; import java.util.regex.Matcher; import java.util.regex.Pattern; @Slf4j public class StrUtil { public static void main(String[] args) { System.out.println(getNumbers("2人")); } /** * 獲取字符串中的數字 * @param content 字符串 * @return 返回null 表示沒有數字或者轉為integer時報錯 */ public static Integer getNumbers(String content) { Integer num = null; if (StringUtils.isBlank(content)) { return num; } // 表示匹配除了數字以外的內容 Pattern pattern = Pattern.compile("[^\\d]"); Matcher matcher = pattern.matcher(content); // 把匹配的內容替換為空字符串 String trim = matcher.replaceAll("").trim(); try { num = Integer.parseInt(trim); } catch (NumberFormatException e) { // 實際在同步數據時, 數據太多, 時間太長了, 去掉打印日志, 節約時間 // log.error("StrUtil getNumbers方法中 字符串轉為數字報錯, " + "傳參:{}, 待轉換字符串: {}, 報錯信息: {}", content, trim, e.getMessage()); } finally { return num; } } } ```
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