/*** * -------------------------------------Copyright (c) 2018,* @Title: StringUtil* @Description: 字符串工具类* --------------------------------------------------------*/
public class StringUtil {/*** 对象转String* @param str 需要转换String的对象* @return*/public static String toString(Object str){return isEmpty(str) ? "" : String.valueOf(str);}/*** 判断字符串对象是否为空* @param str 需校验字符串* @return*/public static boolean isEmpty(Object str) {return (str == null || "".equals(str));}/*** 判断字符串的长度是否大于0* @param str 需校验字符串* @return " " => true; "" => false*/public static boolean hasLength(CharSequence str) {return (str != null && str.length() > 0);}/*** 判断一个字符串是否有内容* @param str* @return*/public static boolean hasText(String str) {return (hasLength((CharSequence) str) && containsText((CharSequence) str));}/*** 判断字符串的内容是否为空白字符* isWhitespace()方法用于判断指定字符是否为空白字符* @param str 需校验字符串* @return*/private static boolean containsText(CharSequence str) {int strLen = str.length();for (int i = 0; i < strLen; i++) {if (!Character.isWhitespace(str.charAt(i))) {return true;}}return false;}/*** 校验给定的字符串str是否以prefix开头，忽略大小写* @param str 需校验字符串* @param prefix 检验字符串的开头的字符串* @return*/public static boolean startsWithIgnoreCase(String str, String prefix) {return (str != null && prefix != null && str.length() >= prefix.length() &&str.regionMatches(true, 0, prefix, 0, prefix.length()));}/*** 校验给定的字符串str是否以suffix结尾，忽略大小写* @param str 需校验字符串* @param suffix 检验字符串的结尾的字符串* @return*/public static boolean endsWithIgnoreCase(String str, String suffix) {return (str != null && suffix != null && str.length() >= suffix.length() &&str.regionMatches(true, str.length() - suffix.length(), suffix, 0, suffix.length()));}/*** 判断sub在str中出现的次数* @param str 全字符串* @param sub 判断出现次数的字符串* @return*/public static int countOccurrencesOf(String str, String sub) {if (!hasLength(str) || !hasLength(sub)) {return 0;}int count = 0;int pos = 0;int idx;while ((idx = str.indexOf(sub, pos)) != -1) {++count;pos = idx + sub.length();}return count;}/*** 删除给定字符串中包含有的任意字符* @param inString 给定字符串* @param charsToDelete 需要删除的字符* @return*/public static String deleteAny(String inString, String charsToDelete) {if (!hasLength(inString) || !hasLength(charsToDelete)) {return inString;}StringBuilder sb = new StringBuilder(inString.length());for (int i = 0; i < inString.length(); i++) {char c = inString.charAt(i);if (charsToDelete.indexOf(c) == -1) {sb.append(c);}}return sb.toString();}
}