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Я пытаюсь подключить базу данных SQLite (сохраненную в папке приложения) к компоненту подбора (принятие строк). Ниже приведен код, который я использовал (ранее советовали):Codename One: ошибки подключения SQLite
Database db = null;
Cursor cur = null;
try {
db = Display.getInstance().openOrCreate("FoodAndBeverage.db");
if(selectItem.getText().startsWith("Still Water")) {
cur = db.executeQuery(selectItem.getText());
int columns = cur.getColumnCount();
addItem.removeAll();
if(columns > 0) {
boolean next = cur.next();
if(next) {
ArrayList<String[]> data = new ArrayList<>();
String[] columnNames = new String[columns];
for(int iter = 0 ; iter < columns ; iter++) {
columnNames[iter] = cur.getColumnName(iter);
}
while(next) {
Row currentRow = cur.getRow();
String[] currentRowArray = new String[columns];
for(int iter = 0 ; iter < columns ; iter++) {
currentRowArray[iter] = currentRow.getString(iter);
}
data.add(currentRowArray);
next = cur.next();
}
Object[][] arr = new Object[data.size()][];
data.toArray(arr);
addItem.add(BorderLayout.CENTER, new Table(new DefaultTableModel(columnNames, arr)));
} else {
addItem.add(BorderLayout.CENTER, "Query returned no results");
}
} else {
addItem.add(BorderLayout.CENTER, "Query returned no results");
}
} else {
db.execute(selectItem.getText());
addItem.add(BorderLayout.CENTER, "Query completed successfully");
}
addItem.revalidate();
} catch(IOException err) {
Log.e(err);
addItem.removeAll();
addItem.add(BorderLayout.CENTER, "Error: " + err);
addItem.revalidate();
} finally {
Util.cleanup(db);
Util.cleanup(cur);
}
Однако, я получаю следующее сообщение об ошибке:
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
java.sql.SQLException: [SQLITE_ERROR] SQL error or missing database (near ".": syntax error)
[EDT] 0:0:0,0 - Exception: java.io.IOException - [SQLITE_ERROR] SQL error or missing database (near ".": syntax error)
at org.sqlite.DB.newSQLException(DB.java:886)
at org.sqlite.DB.newSQLException(DB.java:897)
at org.sqlite.DB.throwex(DB.java:864)
at org.sqlite.NativeDB.prepare(Native Method)
at org.sqlite.DB.prepare(DB.java:207)
at org.sqlite.PrepStmt.<init>(PrepStmt.java:50)
at org.sqlite.SQLiteConnection.prepareStatement(SQLiteConnection.java:616)
at org.sqlite.SQLiteConnection.prepareStatement(SQLiteConnection.java:606)
at org.sqlite.SQLiteConnection.prepareStatement(SQLiteConnection.java:578)
at com.codename1.impl.javase.SEDatabase.execute(SEDatabase.java:90)
at com.mycompany.myapp.MyApplication.AddItem(MyApplication.java:88)
at com.mycompany.myapp.MyApplication.start(MyApplication.java:145)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.codename1.impl.javase.Executor$1$1.run(Executor.java:100)
at com.codename1.ui.Display.processSerialCalls(Display.java:1147)
at com.codename1.ui.Display.mainEDTLoop(Display.java:966)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
java.io.IOException: [SQLITE_ERROR] SQL error or missing database (near ".": syntax error)
at com.codename1.impl.javase.SEDatabase.execute(SEDatabase.java:94)
at com.mycompany.myapp.MyApplication.AddItem(MyApplication.java:88)
at com.mycompany.myapp.MyApplication.start(MyApplication.java:145)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.codename1.impl.javase.Executor$1$1.run(Executor.java:100)
at com.codename1.ui.Display.processSerialCalls(Display.java:1147)
at com.codename1.ui.Display.mainEDTLoop(Display.java:966)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.codename1.impl.javase.Executor$1$1.run(Executor.java:100)
at com.codename1.ui.Display.processSerialCalls(Display.java:1147)
at com.codename1.ui.Display.mainEDTLoop(Display.java:966)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
Caused by: java.lang.IllegalStateException: Layout doesn't support adding with arguments: com.codename1.ui.layouts.BoxLayout
at com.codename1.ui.layouts.Layout.addLayoutComponent(Layout.java:64)
at com.codename1.ui.Container.addComponent(Container.java:525)
at com.codename1.ui.Container.add(Container.java:172)
at com.codename1.ui.Container.add(Container.java:201)
at com.mycompany.myapp.MyApplication.AddItem(MyApplication.java:95)
at com.mycompany.myapp.MyApplication.start(MyApplication.java:145)
... 9 more
Это может быть связано с приложением, не признавая базу данных. Чтобы уточнить, где необходимо сохранить файл базы данных? Я сохранил файл в папке приложения. View of app folder showing where the database file (highlighted) is saved.
