package com.JUtils.base; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * * 字符串工具类，对字符串进行常规的处理 * */ public class StringUtils { /** * 将半角的符号转换成全角符号.(即英文字符转中文字符) * * @param str * 要转换的字符 * @return */ public static String changeToFull(String str) { String source = "1234567890!@#$%^&*()abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_=+\|[];:'",<.>/?"; String[] decode = { "１", "２", "３", "４", "５", "６", "７", "８", "９", "０", "！", "＠", "＃", "＄", "％", "︿", "＆", "＊", "（", "）", "ａ", "ｂ", "ｃ", "ｄ", "ｅ", "ｆ", "ｇ", "ｈ", "ｉ", "ｊ", "ｋ", "ｌ", "ｍ", "ｎ", "ｏ", "ｐ", "ｑ", "ｒ", "ｓ", "ｔ", "ｕ", "ｖ", "ｗ", "ｘ", "ｙ", "ｚ", "Ａ", "Ｂ", "Ｃ", "Ｄ", "Ｅ", "Ｆ", "Ｇ", "Ｈ", "Ｉ", "Ｊ", "Ｋ", "Ｌ", "Ｍ", "Ｎ", "Ｏ", "Ｐ", "Ｑ", "Ｒ", "Ｓ", "Ｔ", "Ｕ", "Ｖ", "Ｗ", "Ｘ", "Ｙ", "Ｚ", "－", "＿", "＝", "＋", "＼", "｜", "【", "】", "；", "：", "'", """, "，", "〈", "。", "〉", "／", "？" }; String result = ""; for (int i = 0; i < str.length(); i++) { int pos = source.indexOf(str.charAt(i)); if (pos != -1) { result += decode[pos]; } else { result += str.charAt(i); } } return result; } /** * 将字符转换为编码为Unicode，格式 为'u0020'<br> * unicodeEscaped(' ') = "u0020"<br> * unicodeEscaped('A') = "u0041" * * @param ch * 待转换的char 字符 * @return */ public static String unicodeEscaped(char ch) { if (ch < 0x10) { return "\u000" + Integer.toHexString(ch); } else if (ch < 0x100) { return "\u00" + Integer.toHexString(ch); } else if (ch < 0x1000) { return "\u0" + Integer.toHexString(ch); } return "\u" + Integer.toHexString(ch); } /** * 进行toString操作，若为空，返回默认值 * * @param object * 要进行toString操作的对象 * @param nullStr * 返回的默认值 * @return */ public static String toString(Object object,String nullStr){ return object == null ? nullStr : object.toString(); } /** * 将字符串重复N次，null、""不在循环次数里面 <br> * 当value == null || value == "" return value;<br> * 当count <= 1 返回 value * * @param value * 需要循环的字符串 * @param count * 循环的次数 * @return */ public static String repeatString(String value,int count){ if(value == null || "".equals(value) || count <= 1){ return value; } int length = value.length(); if(length == 1){ //长度为1，存在字符 return repeatChar(value.charAt(0), count); } int outputLength = length * count; switch (length) { case 1: return repeatChar(value.charAt(0), count); case 2: char ch0 = value.charAt(0); char ch1 = value.charAt(1); char[] output2 = new char[outputLength]; for (int i = count * 2 - 2; i >= 0; i--, i--) { output2[i] = ch0; output2[i + 1] = ch1; } return new String(output2); default: StringBuilder buf = new StringBuilder(outputLength); for (int i = 0; i < count; i++) { buf.append(value); } return buf.toString(); } } /** * 将某个字符重复N次 * * @param ch * 需要循环的字符 * @param count * 循环的次数 * @return */ public static String repeatChar(char ch, int count) { char[] buf = new char[count]; for (int i = count - 1; i >= 0; i--) { buf[i] = ch; } return new String(buf); } /** * 判断字符串是否全部都为小写 * * @param value * 待判断的字符串 * @return */ public static boolean isAllLowerCase(String value){ if(value == null || "".equals(value)){ return false; } for (int i = 0; i < value.length(); i++) { if (Character.isLowerCase(value.charAt(i)) == false) { return false; } } return true; } /** * 判断字符串是否全部大写 * * @param value * 待判断的字符串 * @return */ public static boolean isAllUpperCase(String value){ if(value == null || "".equals(value)){ return false; } for (int i = 0; i < value.length(); i++) { if (Character.isUpperCase(value.charAt(i)) == false) { return false; } } return true; } /** * 反转字符串 * * @param value * 待反转的字符串 * @return */ public static String reverse(String value){ if(value == null){ return null; } return new StringBuffer(value).reverse().toString(); } /** * @desc:截取字符串，支持中英文混乱，其中中文当做两位处理 * * @param resourceString * @param length * @return */ public static String subString(String resourceString,int length){ String resultString = ""; if (resourceString == null || "".equals(resourceString) || length < 1) { return resourceString; } if (resourceString.length() < length) { return resourceString; } char[] chr = resourceString.toCharArray(); int strNum = 0; int strGBKNum = 0; boolean isHaveDot = false; for (int i = 0; i < resourceString.length(); i++) { if (chr[i] >= 0xa1){// 0xa1汉字最小位开始 strNum = strNum + 2; strGBKNum++; } else { strNum++; } if (strNum == length || strNum == length + 1) { if (i + 1 < resourceString.length()) { isHaveDot = true; } break; } } resultString = resourceString.substring(0, strNum - strGBKNum); if (isHaveDot) { resultString = resultString + "..."; } return resultString; } /** * * * @param htmlString * @param length * @return */ public static String subHTMLString(String htmlString,int length){ return subString(delHTMLTag(htmlString), length); } /** * 过滤html标签，包括script、style、html、空格、回车标签 * * @param htmlStr * @return */ public static String delHTMLTag(String htmlStr){ String regEx_script = "<script[^>]*?>[\s\S]*?<\/script>"; // 定义script的正则表达式 String regEx_style = "<style[^>]*?>[\s\S]*?<\/style>"; // 定义style的正则表达式 String regEx_html = "<[^>]+>"; // 定义HTML标签的正则表达式 String regEx_space = "\s*| | | ";//定义空格回车换行符 Pattern p_script = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE); Matcher m_script = p_script.matcher(htmlStr); htmlStr = m_script.replaceAll(""); // 过滤script标签 Pattern p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE); Matcher m_style = p_style.matcher(htmlStr); htmlStr = m_style.replaceAll(""); // 过滤style标签 Pattern p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE); Matcher m_html = p_html.matcher(htmlStr); htmlStr = m_html.replaceAll(""); // 过滤html标签 Pattern p_space = Pattern.compile(regEx_space, Pattern.CASE_INSENSITIVE); Matcher m_space = p_space.matcher(htmlStr); htmlStr = m_space.replaceAll(""); // 过滤空格回车标签 return htmlStr.trim(); // 返回文本字符串 } }