Java实现字符与Unicode互转

青旅半醒 2022-06-18 08:23 514阅读 0赞

Java实现字符与Unicode互转，有两个主要方法：

Integer.toHexString();//转码
    Integer.parseInt();//解码

通过以上两个方法实现对字符的转码与解码。

代码如下：

public class Test{
         
        public static void main(String[] args) {
             
            String str = "李锋镝的个人博客http://www.lifengdi.com";
    //        String str = "假装这里有Emoji表情";
    //        unicode(str);
            System.out.println("decodeUnicode:"+decodeUnicode(unicode(str)));
            System.out.println("decodeUnicode2:"+decodeUnicode2(unicode(str)));
        }
         
        public static String unicode(String source){
            StringBuffer sb = new StringBuffer();
            char [] source_char = source.toCharArray();
            String unicode = null;
            for (int i=0;i<source_char.length;i++) {
                unicode = Integer.toHexString(source_char[i]);
                if (unicode.length() <= 2) {
                    unicode = "00" + unicode;
                }
                sb.append("\\u" + unicode);
            }
            System.out.println(sb);
            return sb.toString();
        }
         
        public static String decodeUnicode(String unicode) {     
            StringBuffer sb = new StringBuffer();
              
            String[] hex = unicode.split("\\\\u");
          
            for (int i = 1; i < hex.length; i++) {
                int data = Integer.parseInt(hex[i], 16);
                sb.append((char) data);
            }
            return sb.toString();  
         } 
         
        public static String decodeUnicode2(String dataStr) {     
            int start = 0;     
            int end = 0;     
            final StringBuffer buffer = new StringBuffer();     
            while (start > -1) {     
                end = dataStr.indexOf("\\u", start + 2);     
                String charStr = null;     
                if (end == -1) {     
                    charStr = dataStr.substring(start + 2, dataStr.length());     
                } else {     
                    charStr = dataStr.substring(start + 2, end);     
                }     
                char letter = (char) Integer.parseInt(charStr, 16);   
                buffer.append(new Character(letter).toString());     
                start = end;     
            }     
            return buffer.toString();     
         } 
     
    }

运行结果如下：

\u674e\u950b\u955d\u7684\u4e2a\u4eba\u535a\u5ba2\u0068\u0074\u0074\u0070\u003a\u002f\u002f\u0077\u0077\u0077\u002e\u006c\u0069\u0066\u0065\u006e\u0067\u0064\u0069\u002e\u0063\u006f\u006d
    decodeUnicode:李锋镝的个人博客http://www.lifengdi.com
    \u674e\u950b\u955d\u7684\u4e2a\u4eba\u535a\u5ba2\u0068\u0074\u0074\u0070\u003a\u002f\u002f\u0077\u0077\u0077\u002e\u006c\u0069\u0066\u0065\u006e\u0067\u0064\u0069\u002e\u0063\u006f\u006d
    decodeUnicode2:李锋镝的个人博客http://www.lifengdi.com

如果是Emoji表情，同样可以进行互转，有兴趣的同学可以试试。

转载请注明：[李锋镝的个人博客][Link 1]>> [ http://www.lifengdi.com/article/10047.html][http_www.lifengdi.com_article_10047.html]

[Link 1]: http://www.lifengdi.com
[http_www.lifengdi.com_article_10047.html]: http://www.lifengdi.com/article/10047.html