84 lines
2.8 KiB
Java
84 lines
2.8 KiB
Java
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package com.bjtds.brichat.util;
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import java.util.*;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class TrainUtils {
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/***
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* 列车号转车厢
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* @param trainNo
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* @return
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*/
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public static Map<String, String> convertTrainNo(String trainNo) {
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// 1. 提取前缀后的数字部分
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Pattern pattern = Pattern.compile("(\\d+)$");
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Matcher matcher = pattern.matcher(trainNo);
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if (!matcher.find()) {
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throw new IllegalArgumentException("无法在前缀 '" + trainNo + "' 中找到数字");
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}
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int i = Integer.parseInt(matcher.group(1));
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// 2. 计算三个基础编号
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int code1 = 3 * (i - 1) + 1;
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int code2 = code1 + 1;
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int code3 = code1 + 2;
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// 格式化为三位数
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String code1Str = String.format("%03d", code1);
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String code2Str = String.format("%03d", code2);
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String code3Str = String.format("%03d", code3);
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// 3. 组装九个车厢号
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List<String> part1 = Arrays.asList("D" + code1Str, "P" + code1Str, "M" + code1Str);
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List<String> part2 = Arrays.asList("M" + code2Str, "P" + code2Str, "F" + code2Str);
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List<String> part3 = Arrays.asList("M" + code3Str, "P" + code3Str, "D" + code3Str);
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// 合并结果
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List<String> allParts = new ArrayList<>();
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allParts.addAll(part1);
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allParts.addAll(part2);
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allParts.addAll(part3);
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// 转换为逗号分隔字符串
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String result = String.join(", ", allParts);
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return Collections.singletonMap("result", result);
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}
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/*
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* 将车厢号转换为列车号
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* @param carriageNumber 车厢号（例如 "D109"）
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* @return 列车号（例如 "RT37"）
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*/
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public static String convertToTrainNo(String carriageNumber) {
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// 1. 提取数字部分并验证格式
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Matcher matcher = Pattern.compile("\\d+").matcher(carriageNumber);
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if (!matcher.find()) {
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throw new IllegalArgumentException("无效的车厢号格式: " + carriageNumber);
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}
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int n = Integer.parseInt(matcher.group());
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// 2. 计算行号 i
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int i = (n + 2) / 3; // 等效于 (n - 1)/3 + 1
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// 3. 验证行号范围
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if (i < 1 || i > 37) {
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throw new IllegalArgumentException("行号超出有效范围 1-37");
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}
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// 4. 验证数字是否符合规则
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int expectedCode1 = 3 * (i - 1) + 1;
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int expectedCode2 = expectedCode1 + 1;
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int expectedCode3 = expectedCode1 + 2;
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if (n != expectedCode1 && n != expectedCode2 && n != expectedCode3) {
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throw new IllegalArgumentException("数字 " + n + " 不符合编码规则");
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}
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// 5. 组合列车号（假设前缀为 RT）
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return "TS" + i;
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}
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}
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