java使用网络接收到unicde编码的中英文混合字符串,但怎么也显示不出来,后来在网上找了教程才搞出来,故记录一下
unicode每个字符占两个字节(汉子和英文都一样),比如如下代码:
String ascii="\u6d4b\u8bd5\u0074\u0065\u0073\u0074"; System.out.println(ascii);输出:测试test
故想法就是使用受到的byte[]拼接以上格式字符串,但发现不行,因为“\u”java会报错
只能用“\\u”,但如此一来,输出的就是unicode编码值
网上找的解决方案,使用下面这个函数即可:
public static String decodeUnicode(String theString) { char aChar; int len = theString.length(); StringBuffer outBuffer = new StringBuffer(len); for (int x = 0; x < len;) { aChar = theString.charAt(x++); if (aChar == '\\') { aChar = theString.charAt(x++); if (aChar == 'u') { // Read the xxxx int value = 0; for (int i = 0; i < 4; i++) { aChar = theString.charAt(x++); switch (aChar) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': value = (value << 4) + aChar - '0'; break; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': value = (value << 4) + 10 + aChar - 'a'; break; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': value = (value << 4) + 10 + aChar - 'A'; break; default: throw new IllegalArgumentException( "Malformed \\uxxxx encoding."); } } outBuffer.append((char) value); } else { if (aChar == 't') aChar = '\t'; else if (aChar == 'r') aChar = '\r'; else if (aChar == 'n') aChar = '\n'; else if (aChar == 'f') aChar = '\f'; outBuffer.append(aChar); } } else outBuffer.append(aChar); } return outBuffer.toString(); }