//显然它似乎保存了它，但它没有在表格中显示，甚至没有在窗格中显示
package library.application.main.lmember;
import java.net.URL;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TableView;
import javafx.scene.control.TableColumn;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.AnchorPane;
import library.application.main.member.AddMemberController;
import library.application.database.Database;
public class LMemberController implements Initializable {
ObservableList<Member> list = FXCollections.observableArrayList();
@FXML
private AnchorPane anchorPane;
@FXML
private TableView<Member> tableView;
@FXML
private TableColumn<Member, String> nameCol;
@FXML
private TableColumn<Member, String> idCol;
@FXML
private TableColumn<Member, String> mobileCol;
@FXML
private TableColumn<Member, String> emailCol;
@Override
public void initialize(URL url, ResourceBundle rb) {
loadData();
initCol();
}
private void initCol(){
nameCol.setCellValueFactory(new PropertyValueFactory<>("name"));
idCol.setCellValueFactory(new PropertyValueFactory<>("id"));
mobileCol.setCellValueFactory(new PropertyValueFactory<>("mobile"));
emailCol.setCellValueFactory(new PropertyValueFactory<>("email"));
}
private void loadData() {
Database handel = Database.getInstance();
String qu = "SELECT * FROM MEMBER";
ResultSet rs = handel.execQuery(qu);
try {
while (rs.next()) {
String name = rs.getString("name");
String mobile = rs.getString("mobile");
String id = rs.getString("id");
String email = rs.getString("email");
list.addAll(new Member(name, id, mobile, email));
}
} catch (SQLException ex) {
Logger.getLogger(AddMemberController.class.getName()).log(Level.SEVERE, null, ex);
}
tableView.setItems(list);
}
public static class Member
{
private final SimpleStringProperty name;
private final SimpleStringProperty id;
private final SimpleStringProperty mobile;
private final SimpleStringProperty email;
public Member(String Nmame, String id, String mobil, String email)
{
this.name = new SimpleStringProperty(Nmame);
this.id = new SimpleStringProperty(id);
this.mobile = new SimpleStringProperty(mobil);
this.email = new SimpleStringProperty(email);
}
public String getName()
{
return name.get();
}
public String getId()
{
return id.get();
}
public String getMobile()
{
return mobile.get();
}
public String getEmail()
{
return email.get();
}
}
}
//这是一个不断弹出的错误即使我定义了移动列，它仍然无法正常工作。
Table MEMBER already exists. Ready for go!
Apr 04, 2018 12:47:01 PM library.application.main.lmember.LMemberController loadData
SEVERE: null
java.sql.SQLException: Column 'mobile' not found.
at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.newSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.ConnectionChild.newSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedResultSet.findColumnName(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedResultSet.getString(Unknown Source)
at library.application.main.lmember.LMemberController.loadData(LMemberController.java:72)
at library.application.main.lmember.LMemberController.initialize(LMemberController.java:52)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at library.application.main.window.MainWindowController.loadWindow(MainWindowController.java:87)
at library.application.main.window.MainWindowController.loadMTable(MainWindowController.java:76)
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:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8413)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:748)
Caused by: ERROR S0022: Column 'mobile' not found.
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown Source)
... 78 more
//这是我的数据库 package library.application.database;
import javax.swing。; import java.sql。;
公共决赛班数据库{
private static Database handel = null ;
private static final String DB_URL = "jdbc:derby:database;create=true";
private static Connection conn = null;
private static Statement stmt = null;
private Database() {
createConnection();
setupBookTable();
setupMemberTable();
}
public static Database getInstance() {
if (handel== null) {
handel = new Database();
}
return handel;
}
void createConnection() {
try {
Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance();
conn = DriverManager.getConnection(DB_URL);
} catch (Exception e) {
e.printStackTrace();
JOptionPane.showMessageDialog(null, "Cant load database", "Database Error", JOptionPane.ERROR_MESSAGE);
System.exit(0);
}
}
void setupBookTable() {
String TABLE_NAME = "BOOK";
try {
stmt = conn.createStatement();
DatabaseMetaData dbm = conn.getMetaData();
ResultSet tables = dbm.getTables(null, null, TABLE_NAME.toUpperCase(), null);
if (tables.next()) {
System.out.println("Table " + TABLE_NAME + " already exists. Ready for go!");
} else {
stmt.execute("CREATE TABLE " + TABLE_NAME + "("
+ " id VARCHAR (200) primary key,\n"
+ " title VARCHAR(200),\n"
+ " author VARCHAR(200),\n"
+ " publiser VARCHAR(100),\n"
+ " isAvail boolean default true"
+ " )");
}
} catch (SQLException e) {
System.err.println(e.getMessage() + " --- setupDatabase");
} finally {
}
}
void setupMemberTable() {
String TABLE_NAME = "MEMBER";
try {
stmt = conn.createStatement();
DatabaseMetaData dbm = conn.getMetaData();
ResultSet tables = dbm.getTables(null, null, TABLE_NAME.toUpperCase(), null);
if (tables.next()) {
System.out.println("Table " + TABLE_NAME + " already exists. Ready for go!");
} else {
stmt.execute("CREATE TABLE " + TABLE_NAME + "("
+ " id VARCHAR(10) primary key,\n"
+ " name VARCHAR(15),\n"
+ " mobile VARCHAR(12),\n"
+ " email VARCHAR(100)\n"
+ " )");
}
} catch (SQLException e) {
System.err.println(e.getMessage() + " --- setupDatabase");
} finally {
}
}
public ResultSet execQuery(String query) {
ResultSet result;
try {
stmt = conn.createStatement();
result = stmt.executeQuery(query);
} catch (SQLException ex) {
System.out.println("Exception at execQuery: data " + ex.getLocalizedMessage());
return null;
} finally {
}
return result;
}
public boolean execAction(String qu) {
try {
stmt = conn.createStatement();
stmt.execute(qu);
return true;
} catch (SQLException ex) {
JOptionPane.showMessageDialog(null, "Error:" + ex.getMessage(), "Error Occured", JOptionPane.ERROR_MESSAGE);
System.out.println("Exception at execQuery: data " + ex.getLocalizedMessage());
return false;
} finally {
}
}
}
答案 0 :(得分：0)
更新您提供DDL语句以修复错误的方法。
方法：
void setupMemberTable() {
String TABLE_NAME = "MEMBER";
try {
stmt = conn.createStatement();
DatabaseMetaData dbm = conn.getMetaData();
ResultSet tabless = dbm.getTables(null, null, TABLE_NAME.toUpperCase(), null);
if (tabless.next()) {
System.out.println("Table " + TABLE_NAME + " already exists. Ready for go!");
} else {
stmt.execute("CREATE TABLE " + TABLE_NAME + "("
+ " id VARCHAR(10) primary key,\n"
+ " COLUMN_NAME VARCHAR(15),\n"
+ " mobile VARCHAR(12),\n"
+ " email VARCHAR(100)\n"
+ " )");
}
} catch (SQLException e) {
System.err.println(e.getMessage() + " --- setupDatabase");
} finally {
}
}
答案 1 :(得分：0)
您使用'name'作为列名，这是保留关键字。 供您参考 -
https://dev.mysql.com/doc/refman/5.5/en/keywords.html
OR 只需加上
DROP TABLE IF EXISTS tablename;在CREATE TABLE语句之前。