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@@ -17,7 +17,7 @@ package com.baomidou.mybatisplus.toolkit;
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/**
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* <p>
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- * String工具类
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+ * String 工具类
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* </p>
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*
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* @author D.Yang
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@@ -25,74 +25,81 @@ package com.baomidou.mybatisplus.toolkit;
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*/
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public class StringUtils {
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- /**
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- * 判断字符串是否为空
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- *
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- * @param str 需要判断字符串
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- * @return 判断结果
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- */
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- public static boolean isEmpty(String str) {
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- return str == null || "".equals(str.trim());
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- }
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+ /**
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+ * 下划线字符
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+ */
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+ public static final char UNDERLINE = '_';
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- /**
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- * 判断字符串是否不为空
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- *
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- * @param str 需要判断字符串
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- * @return 判断结果
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- */
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- public static boolean isNotEmpty(String str) {
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- return (str != null) && !"".equals(str.trim());
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- }
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+ /**
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+ * 判断字符串是否为空
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+ *
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+ * @param str
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+ * 需要判断字符串
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+ * @return 判断结果
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+ */
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+ public static boolean isEmpty(String str) {
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+ return str == null || "".equals(str.trim());
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+ }
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- private static final char UNDERLINE = '_';
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+ /**
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+ * 判断字符串是否不为空
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+ *
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+ * @param str
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+ * 需要判断字符串
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+ * @return 判断结果
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+ */
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+ public static boolean isNotEmpty(String str) {
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+ return (str != null) && !"".equals(str.trim());
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+ }
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- /**
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- * 字符串驼峰转下划线格式
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- *
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- * @param param 需要转换的字符串
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- * @return 转换好的字符串
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- */
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- public static String camelToUnderline(String param) {
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- if (isEmpty(param)) {
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- return "";
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- }
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- int len = param.length();
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- StringBuilder sb = new StringBuilder(len);
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- for (int i = 0; i < len; i++) {
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- char c = param.charAt(i);
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- if (Character.isUpperCase(c)) {
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- sb.append(UNDERLINE);
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- sb.append(Character.toLowerCase(c));
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- } else {
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- sb.append(c);
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- }
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- }
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- return sb.toString();
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- }
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+ /**
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+ * <p>
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+ * 字符串驼峰转下划线格式
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+ * </p>
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+ *
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+ * @param param
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+ * 需要转换的字符串
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+ * @return 转换好的字符串
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+ */
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+ public static String camelToUnderline(String param) {
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+ if (StringUtils.isEmpty(param)) {
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+ return "";
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+ }
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+ int len = param.length();
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+ StringBuilder sb = new StringBuilder(len);
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+ for (int i = 0; i < len; i++) {
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+ char c = param.charAt(i);
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+ if (Character.isUpperCase(c) && i > 0) {
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+ sb.append(UNDERLINE);
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+ }
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+ sb.append(Character.toLowerCase(c));
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+ }
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+ return sb.toString();
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+ }
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- /**
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- * 字符串下划线转驼峰格式
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- *
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- * @param param 需要转换的字符串
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- * @return 转换好的字符串
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- */
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- public static String underlineToCamel(String param) {
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- if (isEmpty(param)) {
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- return "";
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- }
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- int len = param.length();
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- StringBuilder sb = new StringBuilder(len);
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- for (int i = 0; i < len; i++) {
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- char c = param.charAt(i);
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- if (c == UNDERLINE) {
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- if (++i < len) {
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- sb.append(Character.toUpperCase(param.charAt(i)));
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- }
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- } else {
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- sb.append(c);
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- }
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- }
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- return sb.toString();
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- }
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+ /**
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+ * 字符串下划线转驼峰格式
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+ *
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+ * @param param
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+ * 需要转换的字符串
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+ * @return 转换好的字符串
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+ */
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+ public static String underlineToCamel(String param) {
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+ if (isEmpty(param)) {
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+ return "";
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+ }
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+ int len = param.length();
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+ StringBuilder sb = new StringBuilder(len);
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+ for (int i = 0; i < len; i++) {
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+ char c = param.charAt(i);
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+ if (c == UNDERLINE) {
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+ if (++i < len) {
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+ sb.append(Character.toUpperCase(param.charAt(i)));
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+ }
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+ } else {
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+ sb.append(c);
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+ }
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+ }
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+ return sb.toString();
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+ }
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}
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