新增自定义排序工具类
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cloud-common/src/main/java/com/cm/common/utils/SortCodeUtil.java
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178
cloud-common/src/main/java/com/cm/common/utils/SortCodeUtil.java
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package com.cm.common.utils;
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import org.springframework.security.core.parameters.P;
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/**
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* When you feel like quitting. Think about why you started
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* 当你想要放弃的时候，想想当初你为何开始
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*
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* @ClassName: SortCodeUtil
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* @Description: 排序编码工具
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* @Author: WangGeng
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* @Date: 2020/1/14 10:21 下午
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* @Version: 1.0
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**/
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public class SortCodeUtil {
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/**
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* 获取排序Code
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*
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* @param lastCode 上一个编码，第一个null
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* @param separator 分隔符 默认"-"
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* @param sectionLength 片段长度 默认长度3
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* @return
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*/
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public static String getSortCode(String lastCode, String separator, int sectionLength) {
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separator = separator == null || separator.isEmpty() ? "-" : separator;
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sectionLength = sectionLength <= 0 ? 3 : sectionLength;
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String carryFlag = String.format("%0" + sectionLength + "d", 0);
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if (lastCode == null || lastCode.isEmpty()) {
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return carryFlag;
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}
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// 获取分段数组
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String[] sectionArray = lastCode.split(separator);
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boolean hasCarry = true;
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String resultSortCode = "";
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for (int i = sectionArray.length - 1; i >= 0; i--) {
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String section = sectionArray[i];
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if (hasCarry) {
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String nextCode = nextCode(section, sectionLength);
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if (resultSortCode.isEmpty()) {
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resultSortCode = nextCode;
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} else {
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resultSortCode = nextCode + separator + resultSortCode;
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}
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if (carryFlag.equals(nextCode)) {
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hasCarry = true;
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continue;
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}
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hasCarry = false;
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} else {
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resultSortCode = section + separator + resultSortCode;
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}
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}
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return resultSortCode;
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}
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/**
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* 下一个编码，编码大小为 36^sectionLength
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*
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* @param code 编码
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* @param sectionLength 长度
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* @return
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*/
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public static String nextCode(String code, int sectionLength) {
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if (code == null || code.isEmpty()) {
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return String.format("%0" + sectionLength + "d", 0);
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}
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code = code.toUpperCase();
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char[] charArray = code.toCharArray();
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boolean hasCarry = true;
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String resultCode = "";
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for (int i = charArray.length - 1; i >= 0; i--) {
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char currentChar = charArray[i];
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if (hasCarry) {
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char nextChar = nextChar(currentChar);
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resultCode = nextChar + resultCode;
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if ('0' == nextChar) {
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hasCarry = true;
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continue;
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}
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hasCarry = false;
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} else {
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// 没有发生进位直接相加
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resultCode = currentChar + resultCode;
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}
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}
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return resultCode;
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}
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/**
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* 下一个字节
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*
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* @param currentChar
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* @return
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*/
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public static char nextChar(char currentChar) {
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char nextChar = '0';
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if ('0' == currentChar) {
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nextChar = '1';
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} else if ('1' == currentChar) {
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nextChar = '2';
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} else if ('2' == currentChar) {
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nextChar = '3';
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} else if ('3' == currentChar) {
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nextChar = '4';
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} else if ('4' == currentChar) {
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nextChar = '5';
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} else if ('5' == currentChar) {
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nextChar = '6';
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} else if ('6' == currentChar) {
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nextChar = '7';
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} else if ('7' == currentChar) {
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nextChar = '8';
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} else if ('8' == currentChar) {
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nextChar = '9';
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} else if ('9' == currentChar) {
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nextChar = 'A';
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} else if ('A' == currentChar) {
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nextChar = 'B';
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} else if ('B' == currentChar) {
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nextChar = 'C';
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} else if ('C' == currentChar) {
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nextChar = 'D';
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} else if ('D' == currentChar) {
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nextChar = 'E';
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} else if ('E' == currentChar) {
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nextChar = 'F';
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} else if ('F' == currentChar) {
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nextChar = 'G';
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} else if ('G' == currentChar) {
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nextChar = 'H';
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} else if ('H' == currentChar) {
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nextChar = 'I';
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} else if ('I' == currentChar) {
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nextChar = 'J';
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} else if ('J' == currentChar) {
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nextChar = 'K';
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} else if ('K' == currentChar) {
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nextChar = 'L';
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} else if ('L' == currentChar) {
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nextChar = 'M';
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} else if ('M' == currentChar) {
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nextChar = 'N';
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} else if ('N' == currentChar) {
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nextChar = 'O';
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} else if ('O' == currentChar) {
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nextChar = 'P';
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} else if ('P' == currentChar) {
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nextChar = 'Q';
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} else if ('Q' == currentChar) {
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nextChar = 'R';
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} else if ('R' == currentChar) {
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nextChar = 'S';
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} else if ('S' == currentChar) {
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nextChar = 'T';
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} else if ('T' == currentChar) {
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nextChar = 'U';
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} else if ('U' == currentChar) {
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nextChar = 'V';
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} else if ('V' == currentChar) {
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nextChar = 'W';
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} else if ('W' == currentChar) {
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nextChar = 'X';
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} else if ('X' == currentChar) {
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nextChar = 'Y';
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} else if ('Y' == currentChar) {
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nextChar = 'Z';
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}
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return nextChar;
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}
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public static void main(String[] args) {
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String str = "ZZ0-ZZZ-ZZZ-0ZZ";
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System.out.println(getSortCode(str, "-", 3));
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}
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}
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