不废话，上排序前后对比：
类似与windows的目录文件排序，分几种版本C++/C#/JAVA给大家：
1、Java版
package com.eam.util;
/* * The Alphanum Algorithm is an improved sorting algorithm for strings * containing numbers. Instead of sorting numbers in ASCII order like * a standard sort, this algorithm sorts numbers in numeric order. * * The Alphanum Algorithm is discussed at http://www.DaveKoelle.com * * Released under the MIT License - https://opensource.org/licenses/MIT * * Copyright 2007-2017 David Koelle * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. */ import java.util.Arrays; import java.util.Comparator; import java.util.List; import java.util.stream.Collectors; /** * This is an updated version with enhancements made by Daniel Migowski, * Andre Bogus, and David Koelle. Updated by David Koelle in 2017. * * To use this class: * Use the static "sort" method from the java.util.Collections class: * Collections.sort(your list, new AlphanumComparator()); */ public class AlphanumComparator implements Comparator<String> { private final boolean isDigit(char ch) { return ((ch >= 48) && (ch <= 57)); } /** Length of string is passed in for improved efficiency (only need to calculate it once) **/ private final String getChunk(String s, int slength, int marker) { StringBuilder chunk = new StringBuilder(); char c = s.charAt(marker); chunk.append(c); marker++; if (isDigit(c)) { while (marker < slength) { c = s.charAt(marker); if (!isDigit(c)) { break; } chunk.append(c); marker++; } } else { while (marker < slength) { c = s.charAt(marker); if (isDigit(c)) { break; } chunk.append(c); marker++; } } return chunk.toString(); } @Override public int compare(String s1, String s2) { if ((s1 == null) || (s2 == null)) { return 0; } int thisMarker = 0; int thatMarker = 0; int s1Length = s1.length(); int s2Length = s2.length(); while (thisMarker < s1Length && thatMarker < s2Length) { String thisChunk = getChunk(s1, s1Length, thisMarker); thisMarker += thisChunk.length(); String thatChunk = getChunk(s2, s2Length, thatMarker); thatMarker += thatChunk.length(); // If both chunks contain numeric characters, sort them numerically int result = 0; if (isDigit(thisChunk.charAt(0)) && isDigit(thatChunk.charAt(0))) { // Simple chunk comparison by length. int thisChunkLength = thisChunk.length(); result = thisChunkLength - thatChunk.length(); // If equal, the first different number counts if (result == 0) { for (int i = 0; i < thisChunkLength; i++) { result = thisChunk.charAt(i) - thatChunk.charAt(i); if (result != 0) { return result; } } } } else { result = thisChunk.compareTo(thatChunk); } if (result != 0) { return result; } } return s1Length - s2Length; } /** * Shows an example of how the comparator works. * Feel free to delete this in your own code! */ public static void main(String[] args) { List<String> values = Arrays.asList("ASH_1", "ASH_11", "ASH_12", "ASH_100", "HJ1", "HJ_2", "HJ_10", "HJ_100", "1#定型机", "2#定型机", "10#定型机","染色机01#", "染色机02#", "染色机10#"); System.out.println(values.stream().sorted(new AlphanumComparator()).collect(Collectors.joining(" "))); } }
2、C#版
/* * The Alphanum Algorithm is an improved sorting algorithm for strings * containing numbers. Instead of sorting numbers in ASCII order like * a standard sort, this algorithm sorts numbers in numeric order. * * The Alphanum Algorithm is discussed at http://www.DaveKoelle.com * * Based on the Java implementation of Dave Koelle's Alphanum algorithm. * Contributed by Jonathan Ruckwood <jonathan.ruckwood@gmail.com> * * Adapted by Dominik Hurnaus <dominik.hurnaus@gmail.com> to * - correctly sort words where one word starts with another word * - have slightly better performance * * Released under the MIT License - https://opensource.org/licenses/MIT * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * */ using System; using System.Collections; using System.Text; /* * Please compare against the latest Java version at http://www.DaveKoelle.com * to see the most recent modifications */ namespace AlphanumComparator { public class AlphanumComparator : IComparer { private enum ChunkType {Alphanumeric, Numeric}; private bool InChunk(char ch, char otherCh) { ChunkType type = ChunkType.Alphanumeric; if (char.IsDigit(otherCh)) { type = ChunkType.Numeric; } if ((type == ChunkType.Alphanumeric && char.IsDigit(ch)) || (type == ChunkType.Numeric && !char.IsDigit(ch))) { return false; } return true; } public int Compare(object x, object y) { String s1 = x as string; String s2 = y as string; if (s1 == null || s2 == null) { return 0; } int thisMarker = 0, thisNumericChunk = 0; int thatMarker = 0, thatNumericChunk = 0; while ((thisMarker < s1.Length) || (thatMarker < s2.Length)) { if (thisMarker >= s1.Length) { return -1; } else if (thatMarker >= s2.Length) { return 1; } char thisCh = s1[thisMarker]; char thatCh = s2[thatMarker]; StringBuilder thisChunk = new StringBuilder(); StringBuilder thatChunk = new StringBuilder(); while ((thisMarker < s1.Length) && (thisChunk.Length==0 ||InChunk(thisCh, thisChunk[0]))) { thisChunk.Append(thisCh); thisMarker++; if (thisMarker < s1.Length) { thisCh = s1[thisMarker]; } } while ((thatMarker < s2.Length) && (thatChunk.Length==0 ||InChunk(thatCh, thatChunk[0]))) { thatChunk.Append(thatCh); thatMarker++; if (thatMarker < s2.Length) { thatCh = s2[thatMarker]; } } int result = 0; // If both chunks contain numeric characters, sort them numerically if (char.IsDigit(thisChunk[0]) && char.IsDigit(thatChunk[0])) { thisNumericChunk = Convert.ToInt32(thisChunk.ToString()); thatNumericChunk = Convert.ToInt32(thatChunk.ToString()); if (thisNumericChunk < thatNumericChunk) { result = -1; } if (thisNumericChunk > thatNumericChunk) { result = 1; } } else { result = thisChunk.ToString().CompareTo(thatChunk.ToString()); } if (result != 0) { return result; } } return 0; } } }
排序后：
1#定型机 2#定型机 10#定型机 ASH_1 ASH_11 ASH_12 ASH_100 HJ1 HJ_2 HJ_10 HJ_100 染色机01# 染色机02# 染色机10#