解决在ajax进行交互的时候，返回的是乱码，比如？？？？？？？？？？？？这样的记录的解决方法

mysql_query("SET NAMES 'GBK'") or die(error(mysql_error()));

 

 

$db = new mysqli('192.168.200.254', 'dxy' ,'p0o9i8u7', 'patent');if(!$db) {// Show error if we cannot connect.echo 'ERROR: Could not connect to the database.';} else {// Is there a posted query string?if(isset($_POST['queryString'])) {$queryString = $db->real_escape_string($_POST['queryString']);// Is the string length greater than 0?if(strlen($queryString) >0) {$db->query("SET CHARACTER SET utf8");$query = $db->query($query = "select patent_id,patent_name from list_id where patent_id like '%$queryString%' limit 6");if($query) {// While there are results loop through them - fetching an Object (i like PHP5 btw!).while ($result = $query ->fetch_object()) {echo "<li onClick=fill('".$result->patent_id."^^^".$result->patent_name."');>".$result->patent_id."<br/>".$result->patent_name."</li>"; }} else {echo 'ERROR: There was a problem with the query.';}} else {// Dont do anything.} // There is a queryString.} else {echo 'There should be no direct access to this script!';}}