我在Eclipse中使用SQLite数据库，但我遇到了SQLITE_BUSY错误。我已经阅读了这个问题2天了，我尝试了不同的东西，比如每次关闭PreparedStatement-s和Resultset-s或关闭连接。即使我关闭连接并打开一个新连接，我也会收到此错误。下面是我得到错误的代码。在这个类中有几个查询。正在执行的第一个工作正常，但是当涉及到最后一个（我的意思是最后一个被执行）时，应用程序崩溃了。我不明白为什么会这样。我已经看到了这个问题的几乎所有帖子，但我仍然无法修复它。谁能帮帮我吗？我真的需要让它发挥作用。先感谢您！
我的代码：
//WHEN THIS METHOD IS CALLED I GET THE EXCEPTION
private void update(int a){
int index2=a;
try{String queryUpdate="Update Open_Orders set Quantity='"+mapTableProductQuantity.get(index2)+"' where Order_ID='"+orderID +"' and Table_ID='"+id_tavoline+"' and Product_ID='"+mapTableProductID.get(index2)+"'" ;
PreparedStatement pstUpdate = connection.prepareStatement(queryUpdate);
JOptionPane.showMessageDialog(null, "pst u be");
pstUpdate.execute();
JOptionPane.showMessageDialog(null, "u ekzekutua");
pstUpdate.close();
}catch(Exception e){
JOptionPane.showMessageDialog(null, e);
}
}
private void updateDatabase()
{ mapName_ID= new HashMap <String, Integer>();
try{String query="Select Product_Name, Product_ID from Products";
PreparedStatement pst= connection.prepareStatement(query);
ResultSet rsp= pst.executeQuery();
//int no=0;
while(rsp.next()){
mapName_ID.put(rsp.getString("Product_Name"), rsp.getInt("Product_ID"));
}
pst.close();
rsp.close();
}catch(Exception e){
}
if(busy==0)
{
try{String query="insert into Order_Table (Table_ID) values (?)";
//System.out.println("busy eshte "+busy);
PreparedStatement pstInsert = connection.prepareStatement(query);
pstInsert.setInt(1, id_tavoline);
pstInsert.execute();
pstInsert.close();}
catch(Exception e1){
JOptionPane.showMessageDialog(null, "e1 = " +e1);
}
setOrderID();
int totalRows=table.getRowCount();
for(int row=0; row<totalRows;row++)
{
try{
String prName=table.getModel().getValueAt(row, 0).toString();
int quantity = Integer.parseInt(table.getModel().getValueAt(row, 1).toString());
String queryInsert="Insert into Open_Orders (Order_ID, Table_ID, Product_ID, Quantity) values (?,?,?,?)";
PreparedStatement pstInsert1 = connection.prepareStatement(queryInsert);
pstInsert1.setInt(1, orderID);
pstInsert1.setInt(2, id_tavoline);
pstInsert1.setInt(3, mapName_ID.get(prName));
pstInsert1.setInt(3, quantity);
pstInsert1.execute();
pstInsert1.close();
//,id_tavoline, mapName_ID.get(""));
}catch(Exception e ){
JOptionPane.showMessageDialog(null, e);
}
}
}
else {
mapTableProductID= new HashMap<Integer,Integer>();
mapTableProductQuantity=new HashMap<Integer,Integer>();
mapDBProductID = new HashMap<Integer,Integer>();
mapDBProductQuantity = new HashMap<Integer,Integer>();
setOrderID();
int totalRows=table.getRowCount();
int i=0;
for(int row=0; row<totalRows;row++)
{
String name=table.getModel().getValueAt(row, 0).toString();
System.out.println("name= " +name);
mapTableProductID.put(row, mapName_ID.get(name));
System.out.println(" mapName_ID.get(name)= " + mapName_ID.get(name));
System.out.println("mapTableProductID.get(row) = " +mapTableProductID.get(row));
mapTableProductQuantity.put(row, Integer.parseInt(table.getModel().getValueAt(row, 1).toString()));
}
try{connection= sqliteConnection.dbConnector();
String querySelect= "select Product_ID, Quantity from Open_Orders where Order_ID='"+orderID+"' and Table_ID='"+id_tavoline+"'";
PreparedStatement pstSelect = connection.prepareStatement(querySelect);
ResultSet rs=pstSelect.executeQuery();
while(rs.next()){
mapDBProductID.put(i, rs.getInt("Product_ID"));
mapDBProductQuantity.put(i, rs.getInt("Quantity"));
i++;
}
pstSelect.close();
rs.close();
connection.close();
}catch(Exception e2){
JOptionPane.showMessageDialog(null, e2);
}
System.out.println("ne db ka i = " +i);
System.out.println("ne tabele ka = " +totalRows);
if(i>=totalRows){
System.out.println("Reshti 167");
int index1=0;
while(index1<i){
int index2=0;
//boolean found=false;
System.out.println("mapDBProductID.get(index1) = " +mapDBProductID.get(index1));
System.out.println("mapTableProductID.get(index2) = " +mapTableProductID.get(index2));
while((index2<totalRows)){
if(mapDBProductID.get(index1)!=mapTableProductID.get(index2)){
index2++;
}
else{//found=true;
System.out.println("Reshti 177");
if(mapDBProductQuantity.get(index1)!=mapTableProductQuantity.get(index2)){
System.out.println("Reshti 180");
System.out.println(orderID);
connection=sqliteConnection.dbConnector();
update(index2);
}else{
}
index1++;
break;
}
}
if(index2>=totalRows){
try{
String queryDelete="Delete from Open_Orders where Order_ID='"+orderID +"' and Table_ID='"+id_tavoline+"' and Product_ID='"+mapDBProductID.get(index1)+"'" ;
PreparedStatement pstDelete = connection.prepareStatement(queryDelete);
pstDelete.execute();
pstDelete.close();
}catch(Exception e4){
JOptionPane.showMessageDialog(null, "e4 = " +e4);
}
index1++;
}
}
}
if(i<totalRows){
int index1=0;
while(index1<totalRows){
int index2=0;
boolean found=false;
while((index2<i)&&(!found)){
if(mapTableProductID.get(index1)!=mapDBProductID.get(index2)){
index2++;
}else{found=true;
if(mapTableProductQuantity.get(index1)!=mapDBProductQuantity.get(index2)){
try{
String queryUpdate= "Update Open_Orders set Quantity='"+mapTableProductQuantity.get(index1)+"' where Order_ID='"+orderID +"' and Table_ID='"+id_tavoline+"' and Product_ID='"+mapTableProductID.get(index1)+"'" ;
PreparedStatement pstUpdate = connection.prepareStatement(queryUpdate);
pstUpdate.execute();
pstUpdate.close();
}catch(Exception e5){
JOptionPane.showMessageDialog(null, "e5 = " +e5);
}
}
break;
}
index2++;
}
if(index2>=i){
try {
String queryInsert="Insert into Open_Orders (Order_ID, Table_ID, Product_ID, Quantity) values (?,?,?,?)" ;
PreparedStatement pstInsert= connection.prepareStatement(queryInsert);
pstInsert.setInt(1, orderID);
pstInsert.setInt(2, id_tavoline);
pstInsert.setInt(3, mapTableProductID.get(index1));
pstInsert.setInt(1,mapTableProductQuantity.get(index1));
pstInsert.execute();
pstInsert.close();
}catch(Exception e10){
JOptionPane.showMessageDialog(null, "e10 = " +e10);
}
}
index1++;
}
}
}
}
private void setOrderID(){
try{
String query="select Order_ID from Order_Table where Table_ID='" + id_tavoline+"'";
PreparedStatement pst = connection.prepareStatement(query);
ResultSet rs=pst.executeQuery();
rs.next();
orderID=rs.getInt("Order_ID");
pst.close();
rs.close();
connection.close();
}
catch(Exception e)
{
JOptionPane.showMessageDialog(null, "setOrderID = "+e);
}
}