FatttSnake/ClassroomInteraction
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Add queryCourses()

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Fat Snake
2022-06-09 12:31:27 +08:00
parent 1fa0f316c8
commit 4c1398846c
1 changed files with 18 additions and 3 deletions
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21
Library/src/main/java/com/cfive/classroom/library/database/DatabaseHelper.java
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@@ -8,8 +8,12 @@ import com.cfive.classroom.library.database.util.InsertException;
import com.cfive.classroom.library.database.util.NoConfigException; import com.cfive.classroom.library.database.util.NoConfigException;
import com.sun.istack.internal.Nullable; import com.sun.istack.internal.Nullable;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException; import java.sql.SQLException;
import java.time.LocalDateTime; import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List; import java.util.List;
public class DatabaseHelper { public class DatabaseHelper {
@@ -253,10 +257,21 @@ public class DatabaseHelper {
return AttendanceOA.delete(attID); return AttendanceOA.delete(attID);
} }
public static boolean queryCourses(long tchID) throws NoConfigException, SQLException, DependenciesNotFoundException { public static List<Course> queryCourses(long tchID) throws NoConfigException, SQLException, DependenciesNotFoundException {
if (isExistsInTeacher(tchID)) throw new DependenciesNotFoundException(); if (isExistsInTeacher(tchID)) throw new DependenciesNotFoundException();
// TODO: Query Courses ArrayList<Course> courses = new ArrayList<>();
return false; String sql = "SELECT courID FROM course,teacher WHERE course.tchID=teacher.tchID AND course.tchID=?";
try (Connection connection = PoolHelper.getConnection()) {
try (PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
preparedStatement.setLong(1, tchID);
try (ResultSet resultSet = preparedStatement.executeQuery()) {
while (resultSet.next()) {
courses.add(selectFromCourse(resultSet.getLong("courID")));
}
}
}
}
return courses;
} }
public static void close() { public static void close() {