我目前正在尝试编写一个程序（使用MVC方法），该程序从textFields获取值，将这些值保存在ArrayList中，最后通过按下按钮在JTable中显示这些值。
我最近在早先的一个问题中被@camickr指向了正确的方向。好吧，我现在试着听从他的圣人建议，并相信我已经取得了一些进展。但是，当将邪恶按钮添加到流程中时，我无法理解该怎么做。
我已尝试过此How to add row of data to Jtable from values received from jtextfield and comboboxes，但如果我尝试在我的视图中执行此操作，则添加方法无效。
请帮助我OverflowKenobi，你是我唯一的希望。
我的代码：
我的模型根据MVC方法。
package org.lu.ics.inlämningsuppgifter;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.util.*;
import javax.swing.table.DefaultTableModel;
public class PersonTableModel extends AbstractTableModel {
private String[] columnNames = {"Account holder", "Account number"};
private ArrayList<Person> persons;
JTable tbl = new JTable();
DefaultTableModel tableModel = new DefaultTableModel(columnNames, 2);
public PersonTableModel() {
super();
persons = new ArrayList<Person>();
}
public PersonTableModel(ArrayList<Person> persons) {
this.persons = persons;
}
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public String getColumnName(int column) {
return columnNames[column];
}
@Override
public int getRowCount() {
return persons.size();
}
@Override
public Class getColumnClass(int column) {
switch (column) {
case 2: return ArrayList.class;
default: return String.class;
}
}
@Override
public boolean isCellEditable(int row, int column) {
switch (column) {
case 2: return true;
default: return false;
}
}
@Override
public Object getValueAt(int row, int column) {
Person person = this.persons.get(row);
switch (column) {
case 0: return person.getName();
case 1: return person.getPNbr();
case 2: return person.getAccounts();
default: return null;
}
}
@Override
public void setValueAt(Object value, int row, int column) {
Person person = getPerson(row);
switch (column) {
case 0: person.setName((String)value); break;
case 1: person.setPNbr((String)value); break;
case 2: person.setAccounts((ArrayList)value); break;
}
fireTableCellUpdated(row, column);
}
public Person getPerson(int row) {
return persons.get(row);
}
public void addPerson(Person person) {
insertPerson(getRowCount (), person);
}
public void insertPerson(int row, Person person) {
persons.add(row, person);
fireTableRowsInserted(row, row);
}
public void removePerson(int row) {
persons.remove(row);
fireTableRowsDeleted(row, row);
}
public ArrayList<Person> getPersoner() {
return persons;
}
public void setPersons(ArrayList<Person> newPersons) {
persons = newPersons;
}
public Person findPerson(String pNbr) {
for (Person p : this.persons) {
if (p.getPNbr().equals(pNbr)) {
return p;
}
}
return null;
}
public Person removePerson(String pNbr) {
Person p = findPerson(pNbr);
if (p != null) {
persons.remove(p);
}
return null;
}
public void setPersonName(String pNbr, String newName) {
Person p = this.findPerson(pNbr);
if (p != null) {
p.setName(newName);
}
}
}
我的控制器
package org.lu.ics.inlämningsuppgifter;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
public class Controller {
private PersonTableModel persons;
private JFrame frame;
public Controller (PersonTableModel persons, JFrame frame) {
this.persons=persons;
this.frame=frame;
}
public void addPerson (String pNbr, String pName) {
Person tmpPerson = new Person(pNbr, pName);
persons.addPerson(tmpPerson);
}
public void addPersonAccount (String pNbr, String pName, String accNbr) {
Person tmpPerson = new Person(pNbr, pName);
Account account = new Account(accNbr);
tmpPerson.addAccount(account);
account.setOwner(tmpPerson);
persons.addPerson(tmpPerson);
}
public void removePerson(String pRemove) {
persons.removePerson(pRemove);
}
public String[] findPerson(String pNbrFind) {
Person p;
String[] aPerson = null;
p = persons.findPerson(pNbrFind);
if (p != null && p.getAccounts() != null) {
aPerson = new String[4];
aPerson[0] = p.getPNbr();
aPerson[1] = p.getName();
} else if (p != null) {
aPerson = new String[2];
aPerson[0] = p.getPNbr();
aPerson[1] = p.getName();
}
return aPerson;
}
public void updatePersonName(String pNbr, String newPName) {
persons.setPersonName(pNbr, newPName);
}
}
我的观点
package org.lu.ics.inlämningsuppgifter;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JSeparator;
import javax.swing.SwingConstants;
import java.awt.Font;
import javax.swing.JPanel;
import javax.swing.table.DefaultTableModel;
public class PersonApplication {
private JFrame frame;
private JTextField textField_Name;
private JTextField textField_pNbr;
private JTable table;
private JTextField textField_AccNbr;
private JTextField textField_3;
private JButton btnAddPerson;
private JButton btnRemovePerson;
private JLabel lblFullName;
private JLabel lblSocialSecurityNumber;
private JButton btnAddAccountTo;
private JSeparator separator;
private JSeparator separator_1;
private JLabel lblAccounts;
private JSeparator separator_2;
private JLabel lblWelcomeToAtm;
private JLabel lblPleaseEnterName;
private JLabel lblAccountNumber;
private JButton btnNewButton;
private JLabel lblAmount;
private JButton btnWithdraw;
private JButton btnCredit;
private JLabel lblIfNoPlease;
private JLabel lblAccountAdded;
private JLabel lblResponse_Person;
private JLabel lblResponse_Balance;
private JButton btnFindPerson;
private Controller controller;
private PersonTableModel personTable;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
PersonApplication window = new PersonApplication();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public PersonApplication() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 776, 561);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
btnAddPerson = new JButton("Add Person");
btnAddPerson.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
String name = textField_Name.getName();
//controller.addRow(textField_pNbr.getText());
}
}
);
btnAddPerson.setBounds(412, 114, 159, 23);
frame.getContentPane().add(btnAddPerson);
btnAddPerson = new JButton("Add New Person");
frame.getContentPane().setLayout(null);
frame.getContentPane().add(btnAddPerson);
btnFindPerson = new JButton("Find Person");
btnFindPerson.setBounds(412, 46, 159, 23);
frame.getContentPane().add(btnFindPerson);
btnRemovePerson = new JButton("Remove Person");
btnRemovePerson.setBounds(412, 80, 159, 23);
frame.getContentPane().add(btnRemovePerson);
textField_Name = new JTextField();
textField_Name.setBounds(179, 69, 142, 20);
frame.getContentPane().add(textField_Name);
textField_Name.setColumns(10);
lblFullName = new JLabel("Full name:");
lblFullName.setBounds(110, 72, 75, 14);
frame.getContentPane().add(lblFullName);
lblSocialSecurityNumber = new JLabel("Personal identity number:");
lblSocialSecurityNumber.setBounds(21, 97, 149, 14);
frame.getContentPane().add(lblSocialSecurityNumber);
textField_pNbr = new JTextField();
textField_pNbr.setBounds(179, 94, 142, 20);
frame.getContentPane().add(textField_pNbr);
textField_pNbr.setColumns(10);
btnAddAccountTo = new JButton("Add New Account to Person");
btnAddAccountTo.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
}
});
btnAddAccountTo.setBounds(404, 216, 193, 23);
frame.getContentPane().add(btnAddAccountTo);
separator = new JSeparator();
separator.setBounds(258, 157, 237, 2);
frame.getContentPane().add(separator);
separator_1 = new JSeparator();
separator_1.setOrientation(SwingConstants.VERTICAL);
separator_1.setBounds(382, 349, 41, 140);
frame.getContentPane().add(separator_1);
table = new JTable();
table.setModel(new DefaultTableModel());
table.getColumnModel().getColumn(1);
table.getColumnModel().getColumn(0).setPreferredWidth(105);
table.getColumnModel().getColumn(1).setPreferredWidth(107);
table.setBounds(39, 349, 273, 151);
frame.getContentPane().add(table);
lblAccounts = new JLabel("ACCOUNT DISPLAY");
lblAccounts.setFont(new Font("Tahoma", Font.BOLD, 12));
lblAccounts.setBounds(123, 318, 132, 31);
frame.getContentPane().add(lblAccounts);
separator_2 = new JSeparator();
separator_2.setBounds(258, 322, 237, 2);
frame.getContentPane().add(separator_2);
lblWelcomeToAtm = new JLabel("Welcome to ATM!");
lblWelcomeToAtm.setFont(new Font("Arial", Font.ITALIC, 18));
lblWelcomeToAtm.setBounds(309, 11, 186, 14);
frame.getContentPane().add(lblWelcomeToAtm);
lblPleaseEnterName = new JLabel("Please enter name and personal identity
number (obligatory).");
lblPleaseEnterName.setFont(new Font("Tahoma", Font.ITALIC, 11));
lblPleaseEnterName.setBounds(39, 44, 335, 14);
frame.getContentPane().add(lblPleaseEnterName);
textField_AccNbr = new JTextField();
textField_AccNbr.setBounds(169, 217, 142, 20);
frame.getContentPane().add(textField_AccNbr);
textField_AccNbr.setColumns(10);
lblAccountNumber = new JLabel("Account number:");
lblAccountNumber.setBounds(58, 220, 112, 14);
frame.getContentPane().add(lblAccountNumber);
btnNewButton = new JButton("Show accounts");
btnNewButton.setBounds(318, 289, 132, 23);
frame.getContentPane().add(btnNewButton);
textField_3 = new JTextField();
textField_3.setBounds(474, 349, 199, 23);
frame.getContentPane().add(textField_3);
textField_3.setColumns(10);
lblAmount = new JLabel("Amount:");
lblAmount.setBounds(412, 349, 89, 20);
frame.getContentPane().add(lblAmount);
btnWithdraw = new JButton("Withdraw");
btnWithdraw.setBounds(457, 393, 89, 23);
frame.getContentPane().add(btnWithdraw);
btnCredit = new JButton("Credit");
btnCredit.setBounds(580, 393, 89, 23);
frame.getContentPane().add(btnCredit);
lblIfNoPlease = new JLabel("If you wish to make a new account, please
enter prefered account number and press \"Add New Account to Person\" to
proceed.");
lblIfNoPlease.setFont(new Font("Tahoma", Font.ITALIC, 11));
lblIfNoPlease.setBounds(39, 192, 656, 14);
frame.getContentPane().add(lblIfNoPlease);
lblAccountAdded = new JLabel("RESPONSE2");
lblAccountAdded.setFont(new Font("Tahoma", Font.ITALIC, 11));
lblAccountAdded.setBounds(636, 216, 79, 23);
frame.getContentPane().add(lblAccountAdded);
lblResponse_Person = new JLabel("RESPONSE1\r\n");
lblResponse_Person.setFont(new Font("Tahoma", Font.ITALIC, 11));
lblResponse_Person.setBounds(636, 84, 79, 19);
frame.getContentPane().add(lblResponse_Person);
lblResponse_Balance = new JLabel("RESPONSE3");
lblResponse_Balance.setFont(new Font("Tahoma", Font.ITALIC, 11));
lblResponse_Balance.setBounds(523, 439, 94, 25);
frame.getContentPane().add(lblResponse_Balance);
}
}
我的人员班级
package org.lu.ics.inlämningsuppgifter;
import java.util.*;
public class Person {
private String pNbr;
private String name;
private ArrayList<Account> accounts;
public Person(String pNbr, String pName) {
this.setPNbr(pNbr);
this.setName(pName);
accounts = new ArrayList<Account>();
}
public ArrayList<Account> getAccounts() {
return accounts;
}
public void setPNbr(String newPNbr) {
pNbr = newPNbr;
}
public String getPNbr() {
return pNbr;
}
public void setName(String newName) {
this.name=newName;
}
public String getName() {
return this.name;
}
public void setAccounts(ArrayList<Account> newAccounts) {
accounts = newAccounts;
}
public void addAccount(Account anAccount) {
this.getAccounts().add(anAccount);
}
}
我的帐户类
package org.lu.ics.inlämningsuppgifter;
public class Account {
private String nbr;
private double balance;
private Person owner;
public Person getOwner() {
return owner;
}
public void setOwner(Person newOwner) {
owner = newOwner;
}
public void setNbr(String newNbr) {
nbr = newNbr;
}
public String getNbr() {
return nbr;
}
public Account (String accNbr) {
balance = 0.00;
this.setNbr(accNbr);
}
public void setBalance(double newBalance) {
balance = newBalance;
this.setBalance(newBalance);
}
public double getBalance() {
return balance;
}
public void credit(double amount) {
balance = balance + amount;
}
public void withdraw(double amount) {
balance = balance - amount;
}
}
答案 0 :(得分：3)
让我们从...开始......
public class PersonTableModel extends AbstractTableModel {
private String[] columnNames = {"Account holder", "Account number"};
private ArrayList<Person> persons;
JTable tbl = new JTable();
DefaultTableModel tableModel = new DefaultTableModel(columnNames, 2);
对于模型来说，包含视图的MVC范例是毫无意义和普遍违反的，此外，在TableModel
TableModel的重点是什么？
接下来，您永远不会在代码中的任何位置创建PersonTableModel的实例，因此没有任何内容可以与之交互。
根据您当前的代码，实际上不需要控制器，它没有任何价值，这不能通过PersonTableModel直接完成。请记住，Swing已经是MVC的一种形式，在它之上应用另一个MVC只是要求重复代码和额外的工作。
在这个阶段，我会忘记它并专注于理解如何更新表格。
恕我直言，你的PersonApplication做得很多。它应该专注于促进用户功能，以便用户可以看到人（在JTable中）并且可以交互/管理数据。对我来说，这意味着提供一些额外的按钮，允许用户添加/删除/编辑表中的值，但其功能由另一个类管理，并且可以通过对话框提供给用户
当从用户收集新数据时，应该由另一个类处理，该类将信息返回给调用者以进一步处理（或者如果用户取消操作，则忽略）。
我已经将一个非常简单的示例放在一起，向您展示它“可能”如何工作（或者至少会告诉您如何添加数据）
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame();
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JTable table;
private PersonTableModel model;
public TestPane() {
setLayout(new BorderLayout());
model = new PersonTableModel();
table = new JTable(model);
add(new JScrollPane(table));
JButton add = new JButton("Add");
add.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// This is where you'd use a JDialog
// to prompt the user for the details
// they want to add. It could return a new
// instance of Person based on the values
// the user has entered
model.addPerson(new Person("123456", "Banana"));
}
});
add(add, BorderLayout.SOUTH);
}
}
public class PersonTableModel extends AbstractTableModel {
private String[] columnNames = {"Account holder", "Account number"};
private ArrayList<Person> persons;
public PersonTableModel() {
super();
persons = new ArrayList<Person>();
}
public PersonTableModel(ArrayList<Person> persons) {
this.persons = persons;
}
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public String getColumnName(int column) {
return columnNames[column];
}
@Override
public int getRowCount() {
return persons.size();
}
@Override
public Class getColumnClass(int column) {
switch (column) {
case 2:
return ArrayList.class;
default:
return String.class;
}
}
@Override
public boolean isCellEditable(int row, int column) {
switch (column) {
case 2:
return true;
default:
return false;
}
}
@Override
public Object getValueAt(int row, int column) {
Person person = this.persons.get(row);
switch (column) {
case 0:
return person.getName();
case 1:
return person.getPNbr();
case 2:
return person.getAccounts();
default:
return null;
}
}
@Override
public void setValueAt(Object value, int row, int column) {
Person person = getPerson(row);
switch (column) {
case 0:
person.setName((String) value);
break;
case 1:
person.setPNbr((String) value);
break;
case 2:
person.setAccounts((ArrayList) value);
break;
}
fireTableCellUpdated(row, column);
}
public Person getPerson(int row) {
return persons.get(row);
}
public void addPerson(Person person) {
insertPerson(getRowCount(), person);
}
public void insertPerson(int row, Person person) {
persons.add(row, person);
fireTableRowsInserted(row, row);
}
public void removePerson(int row) {
persons.remove(row);
fireTableRowsDeleted(row, row);
}
public ArrayList<Person> getPersoner() {
return persons;
}
public void setPersons(ArrayList<Person> newPersons) {
persons = newPersons;
}
public Person findPerson(String pNbr) {
for (Person p : this.persons) {
if (p.getPNbr().equals(pNbr)) {
return p;
}
}
return null;
}
public Person removePerson(String pNbr) {
Person p = findPerson(pNbr);
if (p != null) {
persons.remove(p);
}
return null;
}
public void setPersonName(String pNbr, String newName) {
Person p = this.findPerson(pNbr);
if (p != null) {
p.setName(newName);
}
}
}
public class Account {
private String nbr;
private double balance;
private Person owner;
public Person getOwner() {
return owner;
}
public void setOwner(Person newOwner) {
owner = newOwner;
}
public void setNbr(String newNbr) {
nbr = newNbr;
}
public String getNbr() {
return nbr;
}
public Account(String accNbr) {
balance = 0.00;
this.setNbr(accNbr);
}
public void setBalance(double newBalance) {
balance = newBalance;
this.setBalance(newBalance);
}
public double getBalance() {
return balance;
}
public void credit(double amount) {
balance = balance + amount;
}
public void withdraw(double amount) {
balance = balance - amount;
}
}
public class Person {
private String pNbr;
private String name;
private ArrayList<Account> accounts;
public Person(String pNbr, String pName) {
this.setPNbr(pNbr);
this.setName(pName);
accounts = new ArrayList<Account>();
}
public ArrayList<Account> getAccounts() {
return accounts;
}
public void setPNbr(String newPNbr) {
pNbr = newPNbr;
}
public String getPNbr() {
return pNbr;
}
public void setName(String newName) {
this.name = newName;
}
public String getName() {
return this.name;
}
public void setAccounts(ArrayList<Account> newAccounts) {
accounts = newAccounts;
}
public void addAccount(Account anAccount) {
this.getAccounts().add(anAccount);
}
}
}
但我必须使用MVC！
同样，Swing是MVC（形式）。首先要掌握基础知识，在Swing之上添加MVC并不是一件容易的事，需要对API的工作方式有很多了解。您需要更好地理解委托和观察者模式，只需命名一对