Java Swing 登录表单

如何解决Java Swing 登录表单

我正在尝试使用 Java Swing 创建登录表单。但我希望布局看起来更紧凑，但仍然反应灵敏。

我的项目结构

Project/
└── src
    ├── GUI
    │   ├── Control.java
    │   ├── Main.java
    │   └── pages
    │       ├── LoginPanel.java
    └── Helper
        └── Helpers.java

编辑

在尝试发布的答案后，我得到了：

This is the picture

form 面板中的组件未按预期运行

还有我的代码：

登录面板

package GUI.pages;
import javax.swing.*;

public class LoginPanel extends JPanel {

    private static final int PADDING = 30;
    // Some labels,button,groups and fields
    private static JLabel usernameLabel;
    private static JTextField usernameInputField;
    private static JLabel passwordLabel;
    private static jpasswordfield passwordInputField;
    private static JButton submit;
    private static JLabel title = Helpers.generateTitle();


    public LoginPanel() {

        setLayout(new BorderLayout());
        setSize(400,400);

        JPanel titleContainer = new JPanel();
        titleContainer.setLayout(new FlowLayout(FlowLayout.LEFT,PADDING,PADDING));
        titleContainer.add(title);

        // the username row
        usernameLabel = new JLabel("Username: ");
        usernameInputField = new JTextField(50);

        // The password row
        passwordLabel = new JLabel("Password: ");
        passwordInputField = new jpasswordfield(150);

        JPanel form = new JPanel();
        form.setLayout(new GridBagLayout());

        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 0;
        c.anchor = GridBagConstraints.WEST;
        c.insets = new Insets(0,20,0);
        form.add(usernameLabel,c);

        c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 1;
        c.anchor = GridBagConstraints.WEST;
        c.insets = new Insets(0,0);
        form.add(passwordLabel,c);

        c = new GridBagConstraints();
        c.gridx = 1;
        c.gridy = 0;
        c.weightx = 0.1;
        c.ipadx = 200;

        form.add(usernameInputField,c);

        c = new GridBagConstraints();
        c.gridx = 1;
        c.gridy = 1;
        c.weightx = 0.001;
        c.weightx = 0.001;
        c.ipadx = 200;

        form.add(passwordInputField,c);

        // The message label,the text depends on the query's result.
        message = new JLabel();

        // Configuring the submit button
        submit = new JButton("Sign in");
        submit.addActionListener(new LoginActionListener());
        submit.setActionCommand("login");

        // Configuring the redirecting button
        registerRedirect.setActionCommand("registerRedirect");
        registerRedirect.addActionListener(new Router());


        JPanel submitContainer = new JPanel();
        submitContainer.setLayout(new FlowLayout(FlowLayout.RIGHT,PADDING));
        submitContainer.add(submit);

        form.setMaximumSize(new Dimension(200,passwordInputField.getHeight()));

        // adding everything to the layout

        add(titleContainer,BorderLayout.PAGE_START);
        add(form);
        add(submitContainer,BorderLayout.PAGE_END);

    }
}

主要

package GUI;

import javax.swing.*;
import GUI.pages.LoginPanel;

public class Main extends JFrame {

    public final static int WINDOW_WIDTH = 750;
    public final static int WINDOW_HEIGHT = 550;

    public static void main(String[] args){
        JFrame frame = new Main();
    }

    public Main(){
        JPanel login_panel = new LoginPanel();
        add(login_panel);
        setSize(WINDOW_WIDTH,WINDOW_HEIGHT);
        setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

}

这就是我想要的样子（更新）：

REM(the title)        
________________________________
           __________________
Username: [__________________]
           __________________
Password: [__________________]
                      
                   [Submit button]
                    

解决方法

我不清楚 submit 按钮是右对齐还是居中，但是..

• 蓝色区域：BorderLayout。
• 红色区域：GridBagLayout - 标签右对齐，文本字段左对齐。在边框布局的 CENTER 中。
• 绿色区域：FlowLayout 与 PAGE_START 左对齐和 PAGE_END 居中对齐或右对齐（根据需要）。