基本思路：
先创建出一个添加课程信息的框架，随后就设置按钮的鼠标监听事件，确保单机后录入信息的合法性，以及确定合法性之后的后续操作，如保存课程信息，信息有误弹出窗口等操作。
1 package Test;
2
3 import javax.swing.JButton;
4 import java.io.*;
5 import javax.swing.JFrame;
6 import javax.swing.JLabel;
7 import javax.swing.JPanel;
8 import javax.swing.JTextField;
9 import java.awt.*;
10 import java.awt.event.ActionEvent;
11 import java.awt.event.ActionListener;
12
13 public class SetClass {
14 String str1="添加课程失败，请核对信息后添加",
15 str2="添加成功";
16 JFrame jf=new JFrame("新课程添加");
17 JPanel panel=new JPanel();
18 JLabel addclass=new JLabel("课程名称");
19 JTextField addclasstext=new JTextField();
20 JLabel teacher=new JLabel("任课老师");
21 JTextField teachertext=new JTextField();
22 JLabel placeclass=new JLabel("上课地点");
23 JTextField placeclasstext=new JTextField();
24 JButton register=new JButton("添加");
25
26 public boolean judgeText(String filepath,String s) //判断信息的合法性
27 {
28 String str="";
29 boolean flag=false;
30 File file=new File(filepath);
31 try {
32 FileReader reader=new FileReader(file);
33 BufferedReader br=new BufferedReader(reader);
34 while((str=br.readLine())!=null)
35 {
36 if(str.equals(s))
37 flag=true;
38 }
39 br.close();
40 reader.close();
41 } catch (FileNotFoundException e) {
42 // TODO Auto-generated catch block
43 e.printStackTrace();
44 } catch (IOException e) {
45 // TODO Auto-generated catch block
46 e.printStackTrace();
47 }
48
49 return flag;
50
51 }
52 public void inputFile(String filepath,JTextField jt) //将信息录入到文件中
53 {
54 File file=new File(filepath);
55 try {
56 FileWriter reader = new FileWriter(file,true);
57 BufferedWriter bw=new BufferedWriter(reader);
58 bw.newLine();
59 bw.write(jt.getText());
60 bw.close();
61 } catch (IOException e) {
62 // TODO Auto-generated catch block
63 e.printStackTrace();
64 }
65 }
66 public void setPanel(JPanel panel) //设置面板
67 {
68 panel.setLayout(null);
69 addclass.setBounds(30, 30, 80, 25);
70 teacher.setBounds(30, 60, 80, 25);
71 placeclass.setBounds(30, 90, 80, 25);
72 register.setBounds(110, 120, 80, 25);
73 register.addActionListener(new ActionListener() { //增加事件监听器
74
75 @Override
76 public void actionPerformed(ActionEvent arg0) {
77 // TODO Auto-generated method stub
78 if(!judgeText("data", addclasstext.getText())&&judgeText("data", teachertext.getText())&&judgeText("data", placeclasstext.getText().substring(0, 2)))
79 {
80 inputFile("data",addclasstext);
81 inputFile("Xclass",addclasstext);
82 inputFile("Xclass",teachertext);
83 inputFile("Xclass",placeclasstext);
84 new MyJf(str2);
85 }
86 else
87 new MyJf(str1);
88 }
89 });
90 addclasstext.setBounds(105, 30, 165, 25);
91 teachertext.setBounds(105, 60, 165, 25);
92 placeclasstext.setBounds(105, 90, 165, 25);
93 panel.add(addclass);
94 panel.add(addclasstext);
95 panel.add(teacher);
96 panel.add(teachertext);
97 panel.add(register);
98 panel.add(placeclass);
99 panel.add(placeclasstext);
100 }
101
102 SetClass() { //为JFrame窗口设置窗口参数
103 // TODO Auto-generated constructor stub
104 jf.setSize(340, 250);
105 jf.setLocationRelativeTo(null);
106 jf.add(panel);
107 setPanel(panel);
108 jf.setVisible(true);
109 jf.setDefaultCloseOperation(3);
110 }
111
112 public static void main(String[] args) {
113 // TODO Auto-generated method stub
114 new SetClass();
115 }
116
117 }
118 class MyJf //创建弹出窗口
119 {
120 JFrame jf1=new JFrame("提示信息");
121 JPanel jp1=new JPanel();
122 JLabel jl=new JLabel();
123 MyJf(String str)
124 {
125 jl.setText(str);
126 jf1.setSize(300, 80);
127 jf1.setVisible(true);
128 jf1.add(jp1);
129 jf1.setDefaultCloseOperation(2);
130 jf1.setLocationRelativeTo(null);
131 jp1.add(jl);
132
133 }
134 }