Java语言 - Unicode编码与字符串互转

news2024/11/28 10:59:42

概述

项目需要Unicode编码与字符串互转，在此做个笔录。

1、code

// Press Shift twice to open the Search Everywhere dialog and type `show whitespaces`,
// then press Enter. You can now see whitespace characters in your code.
public class Main {
    public static void main(String[] args) {
        // Press Alt+Enter with your caret at the highlighted text to see how
        // IntelliJ IDEA suggests fixing it.
        System.out.println("Hello and welcome!");

        String strArray[] = {"嘿嘿嘿hahaha001122", "123456789"};

        for (int i = 0; i < strArray.length; i++) {
            System.out.println("***************** stringToUnicode *****************");
            String unicode = stringToUnicode(strArray[i]);
            System.out.println("stringToUnicode:" + unicode);
            System.out.println("***************** unicodeToString *****************");
            String uniStr = unicodeToString(unicode);
            System.out.println("unicodeToString:" + uniStr + "\n");
        }
    }
    public static String unicodeToString(String unicode) {
        StringBuffer string = new StringBuffer();
        /* 以 \ u切割 */
        String[] hex = unicode.split("\\\\u");
        for (int i = 1; i < hex.length; i++) {
            /* 这里代表将值转为16进制表示，一共有2, 8, 10, 16几种表示 */
            int data = Integer.parseInt(hex[i], 16);
            /* 追加成String */
            string.append((char) data);
        }
        return string.toString();
    }

    public static String stringToUnicode(String string) {
        StringBuffer unicode = new StringBuffer();
        for (int i = 0; i < string.length(); i++) {
            /* 取出每一个字符 */
            char c = string.charAt(i);
            /* 转换为unicode Integer.toHexString(); 返回字符的16进制表示 */
            unicode.append("\\u" + Integer.toHexString(c));
        }
        return unicode.toString();
    }
}

2、运行结果