Java正則表示式工具方法彙總
阿新 • • 發佈:2020-11-18
1.獲取某字串中漢字的個數
... private int getChineseCount(String text) { String Reg = "^[\u4e00-\u9fa5]{1}$";// 正則 int result = 0; for (int i = 0; i < text.length(); i++) { String b = Character.toString(text.charAt(i)); if (b.matches(Reg)) result++; } return result; } ...
2.使用正則替換某字串中所有符合正則的字串為指定字串
//將str中的符合正則regu的字串替換成replaceStr ... private static String replace(String str,String regu,String replaceStr) { Pattern pattern = Pattern.compile(regu); Matcher matcher = pattern.matcher(str); str = matcher.replaceAll(replaceStr); return str; } ...
3.駝峰式轉換成大寫下劃線
... private String humpToLine(String str) { Pattern humpPattern = Pattern.compile("[A-Z]"); Matcher matcher = humpPattern.matcher(str); StringBuffer sb = new StringBuffer(); while (matcher.find()) { matcher.appendReplacement(sb,"_" + matcher.group(0).toLowerCase()); } matcher.appendTail(sb); return sb.toString().toUpperCase(); } ...
4.大寫下劃線轉換成駝峰式
... private String lineToHump(String str) { Pattern linePattern = Pattern.compile("_(\\w)"); str = str.toLowerCase(); Matcher matcher = linePattern.matcher(str); StringBuffer sb = new StringBuffer(); while (matcher.find()) { matcher.appendReplacement(sb,matcher.group(1).toUpperCase()); } matcher.appendTail(sb); return sb.toString(); } ...
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