package org.bood.common.utils; / * * 驼峰与下划线之间互转工具类 *
* * @author:bood * @date:2020/10/16 */ public class CamelCaseUtil {
private static final char SEPARATOR = '_'; public CamelCaseUtil() {
} / * * 转下划线 *
* * @param s: * @return:java.lang.String * @author:bood * @date:2020/10/16 */ public static String toUnderlineName(String s) {
if (s == null) {
return null; } StringBuilder sb = new StringBuilder(); boolean upperCase = false; for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i); boolean nextUpperCase = true; if (i < (s.length() - 1)) {
nextUpperCase = Character.isUpperCase(s.charAt(i + 1)); } if ((i >= 0) && Character.isUpperCase(c)) {
if (!upperCase || !nextUpperCase) {
if (i > 0) sb.append(SEPARATOR); } upperCase = true; } else {
upperCase = false; } sb.append(Character.toLowerCase(c)); } return sb.toString(); } / * * 转驼峰 *
* * @param s: * @return:java.lang.String * @author:bood * @date:2020/10/16 */ public static String toCamelCase(String s) {
if (s == null) {
return null; } s = s.toLowerCase(); StringBuilder sb = new StringBuilder(s.length()); boolean upperCase = false; for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i); if (c == SEPARATOR) {
upperCase = true; } else if (upperCase) {
sb.append(Character.toUpperCase(c)); upperCase = false; } else {
sb.append(c); } } return sb.toString(); } / * * 转大写驼峰 *
* * @param s: * @return:java.lang.String * @author:bood * @date:2020/10/16 */ public static String toCapitalizeCamelCase(String s) {
if (s == null) {
return null; } s = toCamelCase(s); return s.substring(0, 1).toUpperCase() + s.substring(1); } }

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