Java字符串(包含字母和数字)通用排序

说明：本文章是之前查到的一篇安卓版的，具体原文路径忘记了。稍微改了一点，挺符合业务使用的！

一、看代码

/*** 包含数字的字符串进行比较（按照从小到大排序）*/private static Integer compareString(String string1, String string2) {//拆分两个字符串List<String> list1 = splitString(string1);List<String> list2 = splitString(string2);//依次对比拆分出的每个值int index = 0;while (true) {//相等表示两个字符串完全相等if (index >= Math.max(list1.size(), list2.size())) {return 0;}String str1 = null;if (index < list1.size()){str1 = list1.get(index);}else{str1 =  "";}String str2 = null;if (index < list2.size()){str2 = list2.get(index);}else{str2 =  "";}//字符串相等则继续判断下一组数据if (str1.equals(str2)) {index++;continue;}//是纯数字，比较数字大小if (isNum(str1) && isNum(str2)) {if(Integer.parseInt(str1) < Integer.parseInt(str2)){return -1;}else{return 1;}}// 字符串比较大小if(str1.compareTo(str2)>0){return -1;}else{return 1;}}}

/*** 是否是纯数字*/private static Boolean isNum(String str){return Pattern.compile("\\d+").matcher(str).matches();}

/*** 拆分字符串* 输入：第5章第100节课* 返回：[第,5,章第,100,节课]*/private static List<String> splitString(String str){Matcher matcher = Pattern.compile("([^0-9]+)|(\\d+)").matcher(str);List<String> list = new ArrayList<>();while (matcher.find()) {list.add(matcher.group());}return list;}

二、看测试

List<String> strList0 = Arrays.asList(new String[]{"4","2","5","1"});Collections.sort(strList0,(o1, o2) -> compareString(o1, o2));System.out.println(Arrays.asList(strList0));// 输出：[[1, 2, 4, 5]]List<String> strList1 = Arrays.asList(new String[]{"GSM 1900","GSM 1800","GSM 850","GSM 900"});Collections.sort(strList1,(o1, o2) -> compareString(o1, o2));System.out.println(Arrays.asList(strList1));// 输出：[[GSM 850, GSM 900, GSM 1800, GSM 1900]]List<String> strList2 = Arrays.asList(new String[]{"6G","2.4G","5G"});Collections.sort(strList2,(o1, o2) -> compareString(o1, o2));System.out.println(Arrays.asList(strList2));// 输出：[[2.4G, 5G, 6G]]List<String> strList3 = Arrays.asList(new String[]{"n78","DC_12A_n2A","n8","DC_66A_n2A","DC_1A_n77A","DC_2A_n41A"});Collections.sort(strList3,(o1, o2) -> compareString(o1, o2));System.out.println(Arrays.asList(strList3));// 输出：[n8, n78, DC_1A_n77A, DC_2A_n41A, DC_12A_n2A, DC_66A_n2A]]

三、对象测试

@Data
public class SarKeyValVO {private Integer key;private String band;
}

List<SarKeyValVO> sarKeyValVOS = new ArrayList<>();sarKeyValVOS.add(new SarKeyValVO(0,"GSM 1900"));sarKeyValVOS.add(new SarKeyValVO(1,"GSM 1800"));sarKeyValVOS.add(new SarKeyValVO(2,"GSM 850"));sarKeyValVOS.add(new SarKeyValVO(3,"GSM 900"));List<SarKeyValVO> collect = sarKeyValVOS.stream().sorted((o1, o2) -> compareString(o1.getBand(), o2.getBand())).collect(Collectors.toList());System.out.println(Arrays.asList(collect));// {...GSM 850}, {...GSM 900}, {...GSM 1800}, {...GSM 1900}