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~