java解码json中的中文Unicode编码(\uxxxx)

[java]代码库

public String unescapeUnicode(String str){
        StringBuffer b=new StringBuffer();
        Matcher m = Pattern.compile("\\\\u([0-9a-fA-F]{4})").matcher(str);
        while(m.find())
            b.append((char)Integer.parseInt(m.group(1),16));
        return b.toString();
}