我试图通过 Http 请求从 Web 数据库中检索数据。但它不起作用。只有当 sql 字符串包含引号时,才会失败。否则,它工作正常。
当我调试时,返回字符串总是这样:
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/content/28/8269928/html/test.php on line 12 null (id=830020201688)
安卓端代码:
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("strSql", "select * from user where username='test'"));
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://test.com/test.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}
catch(Exception e) {
System.out.println("Connectiong Error");
}
String js = "";
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "/n");
}
is.close();
js = sb.toString();
System.out.println("get = " + js);
}
catch(Exception e) {
System.out.println("Error converting to String");
}
网络服务器 PHP 代码:
$myconn=mysql_connect("68.178.139.15", "username", "password");
mysql_select_db("dbname");
mysql_query("set names 'utf8'");
$strSql = $_REQUEST['strSql'];
$result = mysql_query($strSql, $myconn);
while($row = mysql_fetch_array($result)) {
$output[]=$row;
}
print(json_encode($output));
mysql_close();