My prepared statement not specified - mysql

Question

I am doing a query to the database prepared statement but its just not coming out right.
i get this error when I print my statement.
com.mysql.jdbc.JDBC42PreparedStatement#157b62f9: SELECT * FROM 2015-wind WHERE TimeStamp BETWEEN '2015-01-01' AND '2015-01-25' AND ConnectingArea IN (** NOT SPECIFIED **)
10YAT-APG--L (I print my string and it give me an output).
Anybody knows whats going on here ?
public List<Wind2015> getResultsWind(String beginDate1, String endDate1, String[] connectingAreas1) throws Exception{
int count = 0;
List<Wind2015> myWind2015s = new ArrayList<>();
SimpleDateFormat readFormat = new SimpleDateFormat("EE MMM dd HH:mm:ss z yyyy",
Locale.ENGLISH);
Date date2 = readFormat.parse(beginDate1);
Date date3 = readFormat.parse(endDate1);
String beginDate = new SimpleDateFormat("yyyy-MM-dd").format(date2);
String endDate = new SimpleDateFormat("yyyy-MM-dd").format(date3);
ArrayList<String> connectingArea = new ArrayList<>(Arrays.asList(connectingAreas1));
StringBuilder inputs = new StringBuilder();
for (int i = 0; i < connectingArea.size(); i++) {
if (i < connectingArea.size()-1) {
inputs.append("?,");
} else {
inputs.append("?");
}
}
String connectingAreaInputs = inputs.toString();
Connection connection = null;
PreparedStatement prepareStatement = null;
ResultSet myRs = null;
System.out.println(connectingAreaInputs);
try {
connection = getConnection();
String sql = "SELECT * FROM `2015-wind` WHERE `TimeStamp` BETWEEN ? AND ? AND `ConnectingArea` IN ("+ connectingAreaInputs +")";
prepareStatement = connection.prepareStatement(sql);
prepareStatement.setString(count+=1,beginDate);
prepareStatement.setString(count+=1, endDate);
System.out.println(prepareStatement);
for (String string : connectingArea) {
System.out.println(string);
count+=1;
prepareStatement.setString(count, string);
}
myRs = prepareStatement.executeQuery();
Wind2015 wind2015 = null;
while (myRs.next()) {
String timeStamp = myRs.getString("Timestamp");
String connectingArea1 = myRs.getString("ConnectingArea");
String value = myRs.getString("ActualWindEnergy");
wind2015 = new Wind2015(timeStamp, value, connectingArea1);
myWind2015s.add(wind2015);
}
return myWind2015s;
} finally {
close(connection, prepareStatement, myRs);
}
}

Answer 1

You're printing the prepared statement with this line:
System.out.println(prepareStatement);
before you assign value(s) to the dynamic placeholders in the IN (...) expression, so they're (correctly) displaying as "not [yet] specified".
Move the print statement to after the for loop that it currently sits before.