毕设 基于JAVASpringBoot和Vue小说在线听书网站设计.zip

package com.ivo.mas.system.utils; import org.springframework.util.Base64Utils; import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URL; import java.security.MessageDigest; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; public class StringUtils { public static String ENCODING = "UTF-8"; public static boolean isNotEmpty(String s) { return s != null && !s.trim().equals(""); } public static boolean isEmpty(String s) { return s == null || s.trim().equals(""); } public static boolean isNotNull(String s) { return s != null; } public static boolean isEqual(String s, Object o) { return s != null && s.equals(o); } public static String ArraytoString(String s[]) { String result = ""; if (null != s && s.length > 0) { for (int i = 0; i < s.length; i++) { result += s[i] + ","; } } if (result.length() > 1) { return result.substring(0, result.length() - 1); } else { return ""; } } public static String convert(String s) { if (s == null) return ""; return s.replaceAll("&", "&amp;").replace("'", "&apos;").replace("\"", "&quot;").replace("<", "&lt;").replace(">", "&gt;"); } public static String string2MD5(String inStr) { MessageDigest md5 = null; try { md5 = MessageDigest.getInstance("MD5"); } catch (Exception e) { System.out.println(e.toString()); e.printStackTrace(); return ""; } char[] charArray = inStr.toCharArray(); byte[] byteArray = new byte[charArray.length]; for (int i = 0; i < charArray.length; i++) byteArray[i] = (byte) charArray[i]; byte[] md5Bytes = md5.digest(byteArray); StringBuffer hexValue = new StringBuffer(); for (int i = 0; i < md5Bytes.length; i++) { int val = ((int) md5Bytes[i]) & 0xff; if (val < 16) hexValue.append("0"); hexValue.append(Integer.toHexString(val)); } return hexValue.toString(); } /** * Decode a string using Base64 encoding. * * @param str * @return String */ public static String decodeString(String str) { if (str == null) return null; try { byte[] b = Base64Utils.decode(str.getBytes(ENCODING)); return new String(b, ENCODING); } catch (Exception e) { return null; } } // 全角转半角 public static String ToDBC(String input) { char c[] = input.toCharArray(); for (int i = 0; i < c.length; i++) { if (c[i] == '\u3000') { c[i] = ' '; } else if (c[i] > '\uFF00' && c[i] < '\uFF5F') { c[i] = (char) (c[i] - 65248); } } String returnString = new String(c); return returnString; } //去除空格、回车、换行符、制表符 public static String replaceBlank(String str) { String dest = ""; if (str != null) { Pattern p = Pattern.compile("\\s*|\t|\r|\n"); Matcher m = p.matcher(str); dest = m.replaceAll(""); } return dest; } /** * @param string * @return */ public static String swapFirstLetterCase(String string) { StringBuffer sbuf = new StringBuffer(string); sbuf.deleteCharAt(0); if (Character.isLowerCase(string.substring(0, 1).toCharArray()[0])) { sbuf.insert(0, string.substring(0, 1).toUpperCase()); } else { sbuf.insert(0, string.substring(0, 1).toLowerCase()); } return sbuf.toString(); } static public String createGUID() { // ----------------------------------------------------------------------------------------------------------------- Random objRandom = new Random(); String strEncode = "01234567890ABCDEFGH"; String strGUID = ""; int nPos = 0; char c = '\0'; // ----------------------------------------------------------------------------------------------------------------- for (int i = 0; i < 36; i++) { if (i == 8 || i == 13 || i == 18 || i == 23) { c = '-'; } else { nPos = objRandom.nextInt(); if (nPos < 0) nPos *= -1; nPos = nPos % strEncode.length(); c = strEncode.charAt(nPos); } // if( i strGUID += c; } // for i // ----------------------------------------------------------------------------------------------------------------- return strGUID; } /** * 将字符串数组转化为in条件用的字符串 * * @param str * @return */ public static String getInClause(String[] str) { StringBuffer result = new StringBuffer(); for (int i = 0; i < str.length; i++) { if (i > 0) { result.append(","); } result.append("'" + str[i] + "'"); } return result.toString(); } public static String getInClause(List<String> list) { String[] arr = (String[]) list.toArray(new String[list.size()]); return getInClause(arr); } /** * <p> * Checks if a CharSequence is whitespace, empty ("") or null. * </p> * * <pre> * StringUtils.isBlank(null) = true * StringUtils.isBlank("") = true * StringUtils.isBlank(" ") = true * StringUtils.isBlank("bob") = false * StringUtils.isBlank(" bob ") = false * </pre> * * @param cs the CharSequence to check, may be null * @return {@code true} if the CharSequence is null, empty or whitespace * @since 2.0 * @since 3.0 Changed signature from isBlank(String) to * isBlank(CharSequence) */ public static boolean isBlank(CharSequence cs) { int strLen; if (cs == null || (strLen = cs.length()) == 0) { return true; } for (int i = 0; i < strLen; i++) { if (Character.isWhitespace(cs.charAt(i)) == false) { return false; } } return true; } /** * <p> * Checks if a CharSequence is not empty (""), not null and not whitespace * only. * </p> * * <pre> * StringUtils.isNotBlank(null) = false * StringUtils.isNotBlank("") = false * StringUtils.isNotBlank(" ") = false * StringUtils.isNotBlank("bob") = true * StringUtils.isNotBlank(" bob ") = true * </pre> * * @param cs the CharSequence to check, may be null * @return {@code true} if the CharSequence is not empty and not null and * not whitespace * @since 2.0 * @since 3.0 Changed signature from isNotBlank(String) to * isNotBlank(CharSequence) */ public static boolean isNotBlank(CharSequence cs) { return !StringUtils.isBlank(cs); } /** * */ public static String extract(String regex, String base) { Pattern p = Pattern.compile(regex); Matcher m = p.matcher(base); if (m.find()) { return m.group(); } return ""; } /** * <p> * Removes a substring only if it is at the end of a source string, * otherwise returns the source string. * </p> * * <p> * A {@code null} source string will return {@code null}. An empty ("") * source string will return the empty string. A {@code null} search string * will re