JFrome 登陆/注册/回显无数据库连接小程序

当离开RCP插件区重新回顾一下JFrame窗口程序的标签、页面间的跳转。

完成一个登陆、注册界面。（界面完成后练习输入输出流，将前台的注册信息保存到一个文件夹下的.txt文件中）

首先向通过JFrame写出一个登陆窗体来，然后给注册按钮绑定actionListener监听。

以下为login页面

package demo;

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
//导入必要的包

public class Demo_login extends JFrame{
   
    JTextField jTextField ; //定义文本框组件
    JPasswordField jPasswordField; //定义密码框组件
    JLabel jLabel1,jLabel2;
    JPanel jp1,jp2,jp3;
    JButton jb1,jb2,jb3;  //创建按钮
    public Demo_login(){
        jTextField = new JTextField(12);
        jPasswordField = new JPasswordField(13);
        jLabel1 = new JLabel("用户名");
        jLabel2 = new JLabel("密码");
        jb1 = new JButton("确认");
        jb2 = new JButton("取消");
        jb3 = new JButton("注册");
        jp1 = new JPanel();
        jp2 = new JPanel();
        jp3 = new JPanel();
        
        //设置布局    
        this.setLayout(new GridLayout(3,1));
        
        jp1.add(jLabel1); 
        jp1.add(jTextField);//第一块面板添加用户名和文本框 
        
        jp2.add(jLabel2);
        jp2.add(jPasswordField);//第二块面板添加密码和密码输入框
        
        jp3.add(jb1);
        jp3.add(jb2);
        jp3.add(jb3);//第三块面板添加确认和取消
        jb3.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                Demo_add();    
                }

            public void Demo_add() {
                new Demo_add();
                
            }
        });
       
     
      
        //        jp3.setLayout(new FlowLayout());  　　//因为JPanel默认布局方式为FlowLayout，所以可以注销这段代码.
        this.add(jp1);
        this.add(jp2);
        this.add(jp3);  //将三块面板添加到登陆框上面
        //设置显示
        this.setSize(300, 200);
        //this.pack();
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
        this.setTitle("登陆");
         
    }
    public static void main(String[] args){
        new Demo_login();
        
    }
}

下一步规划注册信息和完成注册界面

package demo;


import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Box;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class Demo_add extends JFrame{

    public static void main(String[] args) {
        new Demo_add();
    }

    String [][] arr = new  String [100][5];
    JLabel id,name,age, gender,introduction;
    ButtonGroup bg;
    JRadioButton female,male;
    JTextArea textArea;
    JTextField tf_id,tf_name,tf_age,jf_introduction;
    JButton btn_register;
    MyPanel jp;
    Box box_id,box_name,box_age,box_gender,box_introduction,baseBox;

    public Demo_add() {

        setVisible(true);
        setSize(400, 450);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        instantiateFunction();
        addFunction();
        

    }

    public void instantiateFunction(){
        jp = new MyPanel(new ImageIcon("./src/picture/pic16.jpg").getImage());
        baseBox = Box.createVerticalBox();
        box_id = Box.createHorizontalBox();
        box_name = Box.createHorizontalBox();
        box_age = Box.createHorizontalBox();
        box_gender = Box.createHorizontalBox();
        box_introduction = Box.createHorizontalBox();
        btn_register = new JButton("注册");    
        tf_id = new JTextField(10);
        tf_name = new JTextField(10);
        tf_age = new JTextField(10);
        bg = new ButtonGroup();
        female = new JRadioButton("女");
        male = new JRadioButton("男");
        textArea = new JTextArea(9,20);
        listenerFunction();

    }

    /**
     * 实现页面跳转和数组传递
     * */

    public void listenerFunction(){
        btn_register.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                
                for (int i = 0; i < arr.length; i++) {
                    //先做一个判断，如果ID不为空，则传过去
                    if(arr[i][0]==null || arr[i][0].equals("")){
                        arr[i][0] =tf_id.getText();
                        arr[i][1] =tf_name.getText();
                        arr[i][2] =tf_age.getText();
                        
                        if(male.isSelected()){
                            arr[i][3] = male.getText();
                        }else{
                            arr[i][3] = female.getText();
                        }
                        arr[i][4] =textArea.getText();
                        
                        break;
                    }
                }
                new Demo_addMessage(arr);

            }
        });
    }

    public void addFunction(){
        add(jp);
        box_id.add(new JLabel("ID：       "));
        box_id.add(tf_id);

        box_name.add(new JLabel("姓名：  "));
        box_name.add(tf_name);

        box_age.add(new JLabel("年龄：  "));
        box_age.add(tf_age);
        
        box_gender.add(new JLabel("性别:  "));
        bg.add(male);
        bg.add(male);
        box_gender.add(male);
        box_gender.add(female);    
         
        box_introduction.add(textArea);


        baseBox.add(Box.createVerticalStrut(15));
        baseBox.add(box_id);
        baseBox.add(Box.createVerticalStrut(15));
        baseBox.add(box_name);
        baseBox.add(Box.createVerticalStrut(15));
        baseBox.add(box_age);
        baseBox.add(Box.createVerticalStrut(15));
        baseBox.add(box_gender);
        baseBox.add(Box.createVerticalStrut(15));
        baseBox.add(new JLabel("个人简介：  "));
        baseBox.add(box_introduction);
        baseBox.add(Box.createVerticalStrut(15));
        baseBox.add(btn_register);
        jp.add(baseBox);
        
    }
}

class MyPanel extends JPanel{
    Image img;
    public MyPanel(Image img) {
        this.img = img;
    }
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.drawImage(img,0,0, this.getWidth(), this.getHeight(), this);
    }
}

正常开发中注册一般会伴随着回显信息的，因为是对JFrame的熟悉所以数据不是来自数据库，我们直接对这个界面中输入的数据回显

package demo;






import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;



public class Demo_addMessage extends JFrame {

    
    JTable table;
    JPanel jp;
    //MyDate model;
    JTable tabel;
    ImageIcon img1,img2,img3;
    
    public Demo_addMessage(String [][] arr) {
        System.out.println("跳过来了");
        setVisible(true);
        setSize(500, 500);
        setTitle("保存信息界面");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        init(arr);

    }

    
    private void init(String [][] arr) {
        //标题数组
                String [] columns = {"ID","姓名","年龄","性别","个人简介"};

                //项目的相对路径./代表项目名称
                /*img1 = new  ImageIcon("./src/picture/dm.png");
                img2 = new  ImageIcon("./src/picture/pic12.jpg");
                img3 = new  ImageIcon("./src/picture/pic2.jpg");*/
                //model = new MyDate(arr,columns);
                jp = new JPanel();
                table = new JTable(arr,columns);//没有图片时的实例化
                //table = new JTable(model);//存在图片时的实例化
                table.setRowHeight(20);

                JScrollPane scrollPanel = new JScrollPane(table);
                jp.add(scrollPanel);
                add(jp);
        
    }

}

到这儿JFrame的界面就简单完成了，下一步就是注册界面练习输入输出流。详情关注下一篇随笔~