前言
这个也是Java实验课程的一个作业，和 Java实现简单的图形界面计算器 一起做的，因为以前没有做过GUI编程，所以做的非常简陋，还有很多BUG，但是感觉当个作业也够了。
程序功能和截图
这里的添加是直接添加到文件中，为什么不用数据库呢？因为我们老师根本就没教，所以也不能用.。
通过输入的名字在文件中查找是否有该用户，如果用，就显示到界面上。
大致的功能就是上面两个。
代码
一、文件读写工具
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package Contacts;
import java.io.*;
/** * Created by Yifan Jia on 2018/6/10. */ public class FileRW { private static FileWriter fileWriter;
private static FileReader fileReader;
private static BufferedReader bf;
private static BufferedWriter bw;
private static File file = new File( "D:\\dest.txt" ); public static void fileWrite(String s) { try { fileWriter = new FileWriter(file, true ); bw = new BufferedWriter(fileWriter); bw.write(s); } catch (IOException e) { e.printStackTrace(); } finally { try { bw.close(); fileWriter.close(); } catch (IOException e) { e.printStackTrace(); } } }
public static String fileRead(String dest) { try { fileReader = new FileReader(file); bf = new BufferedReader(fileReader); String ss; while ((ss = bf.readLine()) != null ) { String[] temp = ss.split( "," ); if (temp[ 0 ].equals(dest)) { return ss; } } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { bf.close(); fileReader.close(); } catch (IOException e) { e.printStackTrace(); } } return null ; } } |
二、界面程序
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package Contacts;
import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent;
//定义自已的MyPanel，用于实现画图 class MyPanelone extends JPanel { private String ss; private int x; private int y; private int size;
public MyPanelone(String ss, int x, int y, int size) { this .ss = ss; this .x = x; this .y = y; this .size = size; }
//覆盖JPanel的paint方法 @Override public void paint(Graphics g) { super .paint(g); g.setColor(Color.BLACK); g.setFont( new Font( "宋体" , Font.BOLD, size)); g.drawString(ss, x, y); } }
public class MyContacts extends JFrame{ private MyPanelone myPaneone; private JPanel[] jPanels = new JPanel[ 7 ]; private JButton[] jButtons = new JButton[ 4 ]; private JTextField[] jTextFields = new JTextField[ 6 ]; private JLabel[] jLabels = new JLabel[ 6 ]; private String[] texts = new String[ 6 ];
private class MyActionListener implements ActionListener {
@Override public void actionPerformed(ActionEvent e) { boolean flag = true ; StringBuilder s = new StringBuilder(); String actionCommand = e.getActionCommand(); if (actionCommand == "添加" ) { for ( int i = 0 ; i < 6 ; i++) { texts[i] = new String(); texts[i] = jTextFields[i].getText(); //System.out.println(texts[i]); if (texts[i].equals( "" ) || texts[i] == null ) { flag = false ; break ; } if (i == 0 ) { s.append(texts[i]); } else { s.append( "," ).append(texts[i]); } } if (flag) { s.append( "\n" ); //将文本域中的内容写成一个字符串 String ss = s.toString(); //将字符串写入文件 FileRW.fileWrite(ss); for ( int i= 0 ;i< 6 ;i++) { jTextFields[i].setText( "" ); } //System.out.println(ss); JFrame jFrame = new JFrame(); jFrame.setBounds( 500 , 300 , 300 , 300 ); MyPanelone myPanelone = new MyPanelone( "添加成功" , 100 , 100 , 20 ); jFrame.add(myPanelone); jFrame.addWindowListener( new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { e.getWindow().dispose(); } }); jFrame.setVisible( true ); } else { JFrame jFrame = new JFrame(); jFrame.setBounds( 500 , 300 , 300 , 300 ); MyPanelone myPanelone = new MyPanelone( "请把所有内容都填写完整" , 60 , 100 , 15 ); jFrame.add(myPanelone); jFrame.addWindowListener( new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { e.getWindow().dispose(); } }); jFrame.setVisible( true ); }
} else if (actionCommand == "清空" ) { for ( int i= 0 ;i< 6 ;i++) { jTextFields[i].setText( "" ); } } else if (actionCommand == "退出" ) { System.exit( 0 ); } else if (actionCommand == "查找" ) { JFrame frame = new JFrame( "输入" );
JPanel jPanel = new JPanel(); JPanel jPanel1 = new JPanel(); JLabel jLabel = new JLabel( "输入查找人的名字" ); JButton jButton = new JButton( "确定" ); JTextField jTextField = new JTextField( 30 ); jPanel.add(jLabel); jPanel.add(jTextField); jButton.addActionListener( new ActionListener() { @Override public void actionPerformed(ActionEvent e) { String actionCommand1 = e.getActionCommand(); String dest = jTextField.getText(); String findresult = FileRW.fileRead(dest); if (findresult == null ) { for ( int i= 0 ;i< 6 ;i++) { jTextFields[i].setText( "" ); } JFrame jFrame = new JFrame(); jFrame.setBounds( 500 , 300 , 300 , 300 ); MyPanelone myPanelone = new MyPanelone( "未找到该用户" , 100 , 100 , 20 ); jFrame.add(myPanelone); jFrame.addWindowListener( new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { e.getWindow().dispose(); } }); jFrame.setVisible( true ); frame.dispose(); } else { String[] tempdest = findresult.split( "," ); for ( int i= 0 ;i< 6 ;i++) { jTextFields[i].setText(tempdest[i]); } frame.dispose(); }
} }); jPanel1.add(jButton); frame.add(jPanel, BorderLayout.CENTER); frame.add(jPanel1, BorderLayout.SOUTH); frame.setBounds( 500 , 300 , 400 , 300 ); frame.addWindowListener( new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { e.getWindow().dispose(); } }); frame.setVisible( true ); } } }
MyContacts() { myPaneone = new MyPanelone( "communication" , 250 , 60 , 60 ); //myPaneone.setSize(1000, 150); this .add(myPaneone); for ( int i= 0 ;i< 7 ;i++) { jPanels[i] = new JPanel(); }
jLabels[ 0 ] = new JLabel( "姓名" ); jLabels[ 1 ] = new JLabel( "邮政编码" ); jLabels[ 2 ] = new JLabel( "通信地址" ); jLabels[ 3 ] = new JLabel( "电话" ); jLabels[ 4 ] = new JLabel( "手机" ); jLabels[ 5 ] = new JLabel( "电子邮件" );
jButtons[ 0 ] = new JButton( "添加" ); jButtons[ 1 ] = new JButton( "查找" ); jButtons[ 2 ] = new JButton( "清空" ); jButtons[ 3 ] = new JButton( "退出" );
for ( int i= 0 ;i< 6 ;i++) { jTextFields[i] = new JTextField( 50 ); }
//设置布局管理 this .setLayout( new GridLayout( 8 , 1 ));
//加入各个组件 for ( int i= 0 ;i< 6 ;i++) { jPanels[i].add(jLabels[i]); jPanels[i].add(jTextFields[i]); this .add(jPanels[i]); } for ( int i= 0 ;i< 4 ;i++) { jButtons[i].addActionListener( new MyActionListener()); jPanels[ 6 ].add(jButtons[i]); } this .add(jPanels[ 6 ]); }
public static void main(String[] args) { JFrame f = new MyContacts(); f.setTitle(f.getClass().getSimpleName()); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setBounds( 400 , 200 , 1000 , 600 ); f.setVisible( true ); } } |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
原文链接：https://blog.csdn.net/q982151756/article/details/80647801