十六进制转字符串

记录一下十六进制转字符串，以备以后使用方便
//十六进制转字符串utf-8

public static String hexToString(String hex) throws UnsupportedEncodingException
	{
	      byte[] b=new byte[hex.length()/2];
	      for(int i=0;i<b.length;i++)
	     {
	         b[i]=(byte)(0xff&Integer.parseInt(hex.substring(i*2, i*2+2), 16));
	     }
	     return new String(b,"utf-8");
}

//字符串转十六进制utf-8

public static String stringToHex(String s)
	{
		String str="";
		byte[] b=s.getBytes(Charset.forName("utf-8"));
	    for(int i=0;i<b.length;i++)
	    {
	    	str+=Integer.toHexString(b[i]&0xff);
	    }
	    return str;
	}