课程添加程序

一、题目

 二、代码

package text20191014;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;

import javax.swing.*;
import java.math.*;
public class NewGUI extends JFrame implements ActionListener{
    private JLabel name,pass,yzm,code,jpg;
    private JTextField tf1,tf3,tf4,tf2;
    private JPasswordField tf5;
    private Button login,register1,register2,jp1;
    private JPanel back,jp2;
    private JFrame j1,j2;
    private Icon icon;
    private String[] kecheng=new String[100];
    private String[] laoshi=new String[100];
    private String[] didian=new String[100];
    private int kesum=0,lssum=0,ddsum=0;
    static String str,user,pwd;


    public static void main(String[] args) {
    NewGUI ng = new NewGUI();
    ng.ShowFrame();
    }

    public void ShowFrame() {
        j1 = new JFrame();
        j1.setTitle("课程录入");
        //j.setLayout(new FlowLayout());
        j1.setLayout(null); //自定义布局

        //设置账号及其输入框
        name = new JLabel("课程名称:");
        Font font = new Font("楷体", Font.PLAIN, 15);
        tf1 = new JTextField("课程名称",20);
        tf1.setFont(font);
        tf1.addMouseListener(new MouseAdapter()
                {
                    public void mouseClicked(MouseEvent e)
                    {
                        if (e.getButton() == MouseEvent.BUTTON1) {
                            if(tf1.getText().equals("课程名称"))
                                tf1.setText("");
                        }
                    }
                });
        name.setBounds(50, 13, 60, 40);
        tf1.setBounds(120, 20, 210, 25);
        tf1.addActionListener(this);

        //设置密码及其输入框
        pass = new JLabel("任课教师:");
        tf2 = new JTextField(20);
        pass.setBounds(50, 53, 60, 40);
        tf2.setBounds(120, 60, 210, 25);

        //设置验证码输入框并添加到面板三
        yzm = new JLabel("上课地点:");
        tf3 = new JTextField(20);
        yzm.setBounds(50, 93, 60, 40);
        tf3.setBounds(120, 100, 210, 25);

        //设置面板来存验证码
//            paint();

        //设置登陆按钮
        login = new Button("录入");
        login.setBackground(Color.orange);
        login.setBounds(80, 150, 240, 40);
        login.addActionListener(this);

        j1.setVisible(true);
        j1.setSize(400, 300);
        j1.setLocationRelativeTo(null);
        j1.setResizable(false);
        j1.setDefaultCloseOperation(3);
        j1.add(name);
        j1.add(tf1);
        j1.add(pass);
        j1.add(tf2);
        j1.add(yzm);
        j1.add(tf3);
        j1.add(login);
    }

    public void actionPerformed(ActionEvent e) {

        if(e.getActionCommand()=="录入") {


           int i = 0;
           boolean pd1=true,pd2=true,pd3=true;
           //课程检查
           for(i = 0;i<kesum;i++) {
               if(kecheng[i].equals(tf1.getText())) {
                   JOptionPane.showMessageDialog(null,"课程名称重复，重新输入！");
                   pd1=false;
               }
           }

         //老师的检查
           if(tf2.getText().equals("王建民")||tf2.getText().equals("刘立嘉")||tf2.getText().equals("刘丹")||tf2.getText().equals("王辉")||tf2.getText().equals("杨子光")) {
                   pd2=true;
           }
           else {
               JOptionPane.showMessageDialog(null,"请输入正确的老师姓名！");
               pd2=false;
           }

           //地点检查
           if(tf3.getText().charAt(1)=='教') {
               if(tf3.getText().charAt(0)=='一'||tf3.getText().charAt(0)=='二'||tf3.getText().charAt(0)=='三'||tf3.getText().charAt(0)=='基') {
                   pd3=true;
               }
               else {
                   pd3=false;
                   JOptionPane.showMessageDialog(null,"请输入正确的上课地点！");
                 }
           }
           else {
               pd3=false;
               JOptionPane.showMessageDialog(null,"请输入正确的上课地点！");
           }
           if(pd1&&pd2&&pd3) {
                 kecheng[kesum++]=tf1.getText();
                 laoshi[lssum++]=tf2.getText();
                 didian[ddsum++]=tf3.getText();
                 JOptionPane.showMessageDialog(null,"录入成功！");

                //创建源
                 File file = new File("dat1.txt");
                 //选择流
                 Writer writer = null;
                 try {
                     writer = new FileWriter(file,true);
                     //操作流
                     writer.append(kecheng[kesum-1]).append("---").append(laoshi[lssum-1]).append("---").append(didian[ddsum-1]).append("\r\n");
                     writer.flush();
                 } catch (FileNotFoundException e1) {
                     e1.printStackTrace();
                 }catch (IOException e1) {
                     // TODO Auto-generated catch block
                     e1.printStackTrace();
                 }finally {
                     try {
                         if(writer!=null)
                         writer.close();
                     } catch (IOException e1) {
                         // TODO Auto-generated catch block
                         e1.printStackTrace();
                     }
                 }
           }
        }
    }
}

三、运行结果

1.主界面

 2.录入成功

3.课程重复

4.教师姓名不正确

 5.导出的信息