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使用 feilong 包来给乱乱的尺码做分组

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feilong edited this page Apr 3, 2020 · 10 revisions

今天小黄黄又来找我了

小黄:

我有个需求, 有以下字符串

EUR 39, EU 39, 38, 2, AUS 38, UK 38, US 37, US 37, US 36, UK 36, UK 35, UK 12/18, UK 12-14, UK 12/21, UK 8/18, UK 8-10

我想要分组, 想要以下结果:

  • [2, 38]
  • [AUS 38]
  • [EU 39]
  • [EUR 39]
  • [UK 12-14]
  • [UK 12/18, UK 12/21]
  • [UK 35, UK 36, UK 38]
  • [UK 8-10]
  • [UK 8/18]
  • [US 36, US 37, US 37]

很好的需求, easy, 使用 #feilong-core# 包 写一个,正好活跃下大脑

1. 实现

大致步骤:

  • 转换成数组或者 list
  • 排序
  • 分组

分组注意点:

  • 数字单独放
  • 开头是字母的要注意 值是 / 或者是 -

这里使用 feilong 包很有用的方法 com.feilong.core.util.CollectionsUtil.group(Iterable<String>, Transformer<String, String>)

具体的代码实现:

    /**
     * 尺码中 支持的符号. 目前由的格式有 UK 12-14, UK 12/21.
     */
    public static final List<String> SEPARATOR_LIST = toList("-", "/");

    //---------------------------------------------------------------

    public static void main(String[] args){
        String str = "EUR 39, EU 39, 38, 2, AUS 38, UK 38, US 37, US 37, US 36, UK 36, UK 35, UK 12/18, UK 12-14, UK 12/21, UK 8/18, UK 8-10";

        Map<String, List<String>> map = group(str);

        //---------------------------------------------------------------
        for (Map.Entry<String, List<String>> entry : map.entrySet()){
            List<String> value = entry.getValue();
            System.out.println(value);
        }
    }

    //---------------------------------------------------------------

    /**
     * 分组
     * @param str
     */
    private static Map<String, List<String>> group(String str){
        String[] tokenizeToStringArray = StringUtil.tokenizeToStringArray(str, ",");
        SortUtil.sortArray(tokenizeToStringArray);

        List<String> list = toList(tokenizeToStringArray);

        //---------------------------------------------------------------
        return CollectionsUtil.group(list, new Transformer<String, String>(){

            @Override
            public String transform(String input){
                //数字单独放
                if (CharUtils.isAsciiNumeric(input.charAt(0))){
                    return "Number";
                }
                //---------------------------------------------------------------
                //字母 以空格分隔
                String country = input.split(SPACE)[0];

                //包含 - 或者 /
                for (String separator : SEPARATOR_LIST){
                    String value = input.split(SPACE)[1];
                    if (value.contains(separator)){
                        return country + separator + value.split(separator)[0];
                    }
                }
                return country;
            }
        });
    }

** 输出 :**

[2, 38]
[AUS 38]
[EU 39]
[EUR 39]
[UK 12-14]
[UK 12/18, UK 12/21]
[UK 35, UK 36, UK 38]
[UK 8-10]
[UK 8/18]
[US 36, US 37, US 37]

maven 依赖

<project>

	....
	<properties>
		<version.feilong-platform>2.1.0</version.feilong-platform>
		....
	</properties>

	....
	<repositories>
		<repository>
			<id>feilong-repository</id>
			<url>https://raw.github.com/venusdrogon/feilong-platform/repository</url>
		</repository>
	</repositories>

	....
	<dependencies>
		....
		<dependency>
			<groupId>com.feilong.platform</groupId>
			<artifactId>feilong-util-all</artifactId>
			<version>${version.feilong-platform}</version>
		</dependency>
		....
	</dependencies>
	....
</project>

~ 完 ~

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