字段按照漢語拼音首字母A-Z排序

[b]一、漢字首字母拼音A-Z排序[/b]
方法一：MySQL數據庫下
[url]https://blog.csdn.net/wjy_treasure/article/details/73119630[/url]

select * from t_student order by CONVERT(trim(user_name) USING gbk) asc;

方法二：
[url]https://blog.csdn.net/angel708884645/article/details/51099115[/url]

	/**
	 * 根據漢字首字母拼音按A-Z依次排序
	 * @param charactersArr
	 * @return
	 */
	public static String[] getSortedCharacters(String[] charactersArr){
		//w d c l h y z
		//c d h l w y z
		charactersArr=new String[]{"王明","當敏","菜盛","李強","黃鉅","俞二","俞四","李麗麗"};
		Comparator comparator=Collator.getInstance(Locale.SIMPLIFIED_CHINESE);
		Arrays.sort(charactersArr, comparator);
		for (int i = 0; i < charactersArr.length; i++) {
			System.out.println(i+"="+charactersArr[i]);
		}
		return charactersArr;
	}

[b]二、UTF8與GBK對比[/b]
[url]https://blog.csdn.net/zs15yy/article/details/73921100[/url]
UTF8:英文字符佔用 1個字節，中文字符佔用3個字節；
GBK: 文字編碼使用雙字節編碼，即中英文字符均佔用 2個字節；