[英]java.sql.SQLException: After end of result set error in mysql
我试图从数据库中读取数据并将ResultSet
存储在ArrayList
。 但是,我收到错误java.sql.SQLException: After end of result set
打印数组列表时java.sql.SQLException: After end of result set
。 我检查了是否没有根据此链接两次调用result.next()
。 有人有更好的方法来存储结果集吗? 然后,我可以在所需的位置将其打印出来。
Statement stmt=con.createStatement();
ResultSet rsVehicle=stmt.executeQuery("select * from vehicle");
while(rsVehicle.next()) {
vehicleList.add(rsVehicle);
}
System.out.println(vehicleList.size());
for(int i=0;i<vehicleList.size();i++) {
System.out.println(vehicleList.get(i).getInt(1)+" "+vehicleList.get(i).getString(2)+" "+vehicleList.get(i).getString(3)+" "+
vehicleList.get(i).getString(4)+" "+vehicleList.get(i).getString(5)+" "+vehicleList.get(i).getString(6)+" "+
vehicleList.get(i).getString(7)+" "+vehicleList.get(i).getString(8)+" "+vehicleList.get(i).getString(9)+" "+
vehicleList.get(i).getString(10)+" "+vehicleList.get(i).getString(11)+" "+vehicleList.get(i).getString(12)+" "+
vehicleList.get(i).getString(13)+" "+vehicleList.get(i).getString(14)+" "+vehicleList.get(i).getString(15));
}
PreparedStatement ps;
ps =con.prepareStatement("SELECT * from job WHERE date = ?");
ps.setString(1, date);
ResultSet rsJob=ps.executeQuery();
while(rsJob.next()) {
jobList.add(rsJob);
}
System.out.println(jobList.size());
for(int i=0;i<jobList.size();i++) {
System.out.println(jobList.get(i).getInt(1)+" "+jobList.get(i).getString(2)+" "+jobList.get(i).getString(3)+" "+
jobList.get(i).getString(4)+" "+jobList.get(i).getString(5)+" "+jobList.get(i).getString(6)+" "+
jobList.get(i).getString(7)+" "+jobList.get(i).getString(8)+" "+jobList.get(i).getString(9)+" "+
jobList.get(i).getString(10)+" "+jobList.get(i).getString(11)+" "+jobList.get(i).getString(12)+" "+
jobList.get(i).getString(13)+" "+jobList.get(i).getString(14)+" "+jobList.get(i).getString(15));
}
在代码中,将结果集添加到列表中,然后遍历该列表以获取数据,但是正确的流程是:
该代码应类似于:
// Create a new list of vehicles
List<Vehicle> vehicleList = new ArrayList<>();
Statement stmt=con.createStatement();
ResultSet rsVehicle=stmt.executeQuery("select * from vehicle");
while(rsVehicle.next()) {
// Create a new vehicle for each record returned from the query
Vehicle vehicle = new Vehicle();
// Set to the vehicle each property taken from that record
vehicle.setBrand(rsVehicle.getString(1));
...
// Add that vehicle to the list
vehicleList.add(vehicle);
}
...
// Iterate the list and print each field you need
for (Vehicle vehicle: vehicleList) {
// PRint each vehicle
System.out.println("Vechicle brand: " + vehicle.getBrand());
}
注意:如果您将Vehicle类的方法重新定义为toString
,则可以直接调用System.out.println(vehicle);
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