Обновление Java MySQL выполнить обновление - PullRequest
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Обновление Java MySQL выполнить обновление

0 голосов
/ 07 марта 2012

я попытался написать код, который обновлял бы запись при нажатии кнопки с любыми изменениями в любых полях.он отображает сообщение об ошибке, хотя.это код: 

    JButton button = new JButton("Save");
    button.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {         

        try {
            con.stmt.executeUpdate("UPDATE student set (StudentID=" + txtAUniqueStudent.getText() + ", FirstName=" + textField_1.getText() + ", Surname=" + textField_2.getText() + ", DOB=" + textField_3.getText() + ", Gender=" + textField.getText() + ", AddressLine1=" + textField_4.getText() + ", AddressLine2=" + textField_5.getText() + ", PostCode=" + textField_6.getText() + ", FatherFullName=" + textField_7.getText() + ", Phone" + textField_8.getText() + ", Mobile=" + textField_9.getText() + ", Fax=" + textField_10.getText() + ", Email=" + textField_11.getText() + ", EmergencyContactName=" + textField_12.getText() + ", EmergencyTel=" + textField_13.getText() + ", AcademicYear=" + textField_14.getText() + ", Subjects=" + textField_15.getText() + "WHERE studentID =" + textField_16.getText());
            con.stmt.executeUpdate();
            JOptionPane.showMessageDialog(frmFindStudent, "Record has been updated successfully.");
        } 

        catch (SQLException e) {
        //System.out.println("Record couldn't be added!");
        e.printStackTrace();
        JOptionPane.showMessageDialog(frmFindStudent, "Record couldn't be updated. Please try again.");
        }
        }
        });
    button.setBounds(333, 517, 89, 23);
    panel_1.add(button);

Соединение с БД и прочее все работает, так что это должен быть только синтаксис, так как это сообщение об ошибке, которое я получаю: 

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(StudentID=25415, FirstName=Shangeethan, Surname=Seevaratnam, DOB=30.08.1994, Ge' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1749)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1666)
at FindStudent$2.actionPerformed(FindStudent.java:255)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

1 Ответ

2 голосов
/ 07 марта 2012

у вас есть ошибка, вы забыли = знак: 

 ", Phone" + textField_8.getText()

также вы открываете (без закрытия, и на самом деле вам это не нужно: 

set (StudentID

вам нужно поставить Stringмежду кавычками 'name' в случае, если есть имена с пробелами, например: 

con.stmt.executeUpdate("UPDATE student set StudentID='" + txtAUniqueStudent.getText() + "', FirstName='" + textField_1.getText() + "', Surname='" + textField_2.getText() + "', DOB='" + textField_3.getText() + "', Gender='" + textField.getText() + "', AddressLine1='" + textField_4.getText() + "', AddressLine2='" + textField_5.getText() + "', PostCode='" + textField_6.getText() + "', FatherFullName='" + textField_7.getText() + "', Phone='" + textField_8.getText() + "', Mobile='" + textField_9.getText() + "', Fax='" + textField_10.getText() + "', Email='" + textField_11.getText() + "', EmergencyContactName='" + textField_12.getText() + "', EmergencyTel='" + textField_13.getText() + "', AcademicYear='" + textField_14.getText() + "', Subjects='" + textField_15.getText() + "' WHERE studentID ='" + textField_16.getText()) + "'";

, вы можете использовать String.format, более читабельный и легко обнаруживать ошибки: 

String statement = String.format("UPDATE student set studentId='%s', firstName='%s'",
id, name);
...