JavaUI界面不跳转？是怎么回事？

zzq258789 2019-07-04 09:49:32

import java.awt.*;
import java.awt.*;
import java.awt.event.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Arrays;

import javax.swing.*;

public class Login {

private JFrame jf;//窗口
private JPanel jp1,jp2,jp3,jp4;//面板
private JLabel jlb1,jlb2,jlb3;//标签
private JButton jb1,jb2,jb3;//按钮
private JTextField jtf;//文本
private JPasswordField jpf;//密码
private JRadioButton jrb1,jrb2;//选项（点）按钮
private ButtonGroup bg; //控制点的选择（按钮）
final private File filestu = new File("e:\\abc\\file\\Student.txt");//学生文件
final private File filetea = new File("e:\\abc\\file\\Teacher.txt");//教师文件

public Login() {

}
private class RegisterInfo {

private JFrame jfr;//窗口
private JPanel jp1,jp2,jp3,jp4;//面板
private JLabel jlb1,jlb2,jlb3;//标签
private JButton jb1,jb2,jb3;//按钮
private JTextField jtf;//文本
private JPasswordField jpf;//密码
private JRadioButton jrb1,jrb2;//选项（点）按钮
private ButtonGroup bg; //控制点的选择（按钮）

public RegisterInfo() {
init();
}

public void init() {
if(!filestu.exists())
try {
filestu.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
if(!filetea.exists())
try {
filetea.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
//<1>设置主页面
jfr = new JFrame("学生管理系统");
jfr.setSize(300, 250);//窗体大小
jfr.setLocationRelativeTo(null);//居中显示
jfr.setLayout(new FlowLayout());//设置布局
jfr.setResizable(false); //设置窗口不能改变大小
//一初始化就有面板
jp1 = new JPanel();
jp2 = new JPanel();
jp3 = new JPanel();
jp4 = new JPanel();
//(1)设置标签
jlb1 = new JLabel("用户名");
jlb2 = new JLabel("密码");
jlb3 = new JLabel("身份");
//(2)设置按钮
jb1 = new JButton("确定");
jb2 = new JButton("重置");
jb3 = new JButton("返回");

jrb1 = new JRadioButton("教师");
jrb2 = new JRadioButton("学生");
bg = new ButtonGroup();
bg.add(jrb1);
bg.add(jrb2);
jrb2.setSelected(true);//默认学生按钮
//(3)创建文本框
jtf = new JTextField(10);
//(4)密码框
jpf = new JPasswordField(10);

//<2>添加部件(添加到面板)

jp1.add(jlb1);
jp1.add(jtf);

jp2.add(jlb2);
jp2.add(jpf);

jp3.add(jb1);
jp3.add(jb2);
jp3.add(jb3);

jp4.add(jlb3);
jp4.add(jrb1);
jp4.add(jrb2);

//(1)将组件都添加到窗体上

jfr.add(jp1);
jfr.add(jp2);
jfr.add(jp4);
jfr.add(jp3);
//<3>添加窗体事件
myEvent();
//<4>设置窗体可见
jfr.setVisible(true);
}

public void myEvent() {

//(1)窗体关闭
jfr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//(2)监听---确定
jb1.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {

if(jtf.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "请输入用户名", "提示信息", JOptionPane.WARNING_MESSAGE);
return;
}else if(jpf.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "请输入密码", "提示信息", JOptionPane.WARNING_MESSAGE);
return;
}
boolean flag = false;
if(jrb1.isSelected()) {
flag = WriteInFile(1,jtf.getText(),jpf.getText());
}else {
flag = WriteInFile(2,jtf.getText(),jpf.getText());
}

if(flag) {
JOptionPane.showMessageDialog(null, "注册成功", "提示信息", JOptionPane.WARNING_MESSAGE);
//jfr.setVisible(false);//dispose()
//jf.setVisible(true);
jfr.dispose();//关掉当前页面
new Login().init();;//打开新的页面

}else {
JOptionPane.showMessageDialog(null, "注册失败，请重新注册！", "提示信息", JOptionPane.ERROR_MESSAGE);
jtf.setText("");
jpf.setText("");
}

}

});
//重置按钮
jb2.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
jtf.setText("");
jpf.setText("");
}

});
//返回
jb3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jfr.setVisible(false);
jf.setVisible(true);

}
});

}

}

public void init() {
if(!filestu.exists())
try {
filestu.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
if(!filetea.exists())
try {
filetea.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
//<1>设置主页面
jf = new JFrame("学生管理系统");
jf.setSize(300, 250);//窗体大小
jf.setLocationRelativeTo(null);//居中显示
jf.setLayout(new FlowLayout());//设置布局
jf.setResizable(false); //设置窗口不能改变大小
//一初始化就有面板
jp1 = new JPanel();
jp2 = new JPanel();
jp3 = new JPanel();
jp4 = new JPanel();
//(1)设置标签
jlb1 = new JLabel("用户名");
jlb2 = new JLabel("密码");
jlb3 = new JLabel("权限");
//(2)设置按钮
jb1 = new JButton("登录");
jb2 = new JButton("重置");
jb3 = new JButton("注册");

jrb1 = new JRadioButton("教师");
jrb2 = new JRadioButton("学生");
bg = new ButtonGroup();
bg.add(jrb1);
bg.add(jrb2);
jrb2.setSelected(true);//默认学生按钮
//(3)创建文本框
jtf = new JTextField(10);
//(4)密码框
jpf = new JPasswordField(10);

//<2>添加部件(添加到面板)

jp1.add(jlb1);
jp1.add(jtf);

jp2.add(jlb2);
jp2.add(jpf);

jp3.add(jb1);
jp3.add(jb2);
jp3.add(jb3);

jp4.add(jlb3);
jp4.add(jrb1);
jp4.add(jrb2);

//(1)将组件都添加到窗体上

jf.add(jp1);
jf.add(jp2);
jf.add(jp4);
jf.add(jp3);
//<3>添加窗体事件
myEvent();

//<4>设置窗体可见
jf.setVisible(true);
}

//窗体事件
public void myEvent() {
//(1)窗体关闭
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//(2)监听---登录按钮
jb1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
userChoice();
}

});
//重置按钮
jb2.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
jtf.setText("");
jpf.setText("");
}

});
//注册按钮
jb3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {

//jf.setVisible(false);
jf.dispose();
new RegisterInfo();
}
});

}

//登录提示信息
public void showinfo(int num) {
boolean flag = false;
if(jtf.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "请输入用户名", "提示信息", JOptionPane.WARNING_MESSAGE);
return;
}else if(jpf.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "请输入密码", "提示信息", JOptionPane.WARNING_MESSAGE);
return;
}
if(num==1) {
flag = readFileOfStudent(filetea,jtf.getText(),jpf.getText());

}else if(num==2) {
flag = readFileOfStudent(filestu,jtf.getText(),jpf.getText());
}
if(flag&&num==1) {
JOptionPane.showMessageDialog(null, "登录成功", "提示信息", JOptionPane.WARNING_MESSAGE);
jf.dispose();
new TeacherUser();

}else if(flag&&num==2) {
JOptionPane.showMessageDialog(null, "登录成功", "提示信息", JOptionPane.WARNING_MESSAGE);
jf.dispose();
new StudentUser();
}else {
JOptionPane.showMessageDialog(null, "用户名或密码错误！", "提示信息", JOptionPane.ERROR_MESSAGE);
jtf.setText("");
jpf.setText("");
}

}
//用户选择
public void userChoice() {
int num=-1;
if(jrb2.isSelected()) {
num=2;
}else {
num=1;
}
//System.out.println(num);
showinfo(num);

}
//将信息写入文件
public boolean WriteInFile(int num,String user,String pwd) {
if(user==null || pwd==null)
return false;

if(num==2) {
if(WriteToFile(filestu,user,pwd)) {
return true;
}

}else if(num==1) {

if(WriteToFile(filetea,user,pwd)) {
return true;
}

}else {
//System.out.println("没有任何学生和老师，请重新注册！");
return false;
}

return false;
}

public boolean WriteToFile(File file,String user,String pwd) {
if(user==null || pwd == null)
return false;
if(file==null) {
System.out.println("没有文件");
return false;
}
BufferedWriter bufw = null;
try {
bufw = new BufferedWriter(new FileWriter(file,true));

if(readFileOfStudent(file,user,pwd)) {

JOptionPane.showMessageDialog(null, "输入已存在！", "提示信息", JOptionPane.ERROR_MESSAGE);
//jtf.setText("");
//jpf.setText("");
return false;
}

bufw.write(user+" "+pwd);

bufw.newLine();

} catch (IOException e) {
e.printStackTrace();
}finally {
try {
if(bufw!=null)
bufw.close();
} catch (IOException e) {

System.out.println("文件关闭失败");
}
}
return true;
}

//读文件
public boolean readFileOfStudent(File file,String name,String pwd) {
BufferedReader bufr = null;
//System.out.println(name+pwd);
boolean flag = false;
try {
bufr = new BufferedReader(new FileReader(file));
} catch (FileNotFoundException e) {
new RuntimeException("该文件不存在！");
}

String len = null;
String infoReg = " +";
String[]s = null;
try {

while((len = bufr.readLine())!=null) {
s = len.split(infoReg);
if(s[0].equals(name)&&s[1].equals(pwd)) {
return true;
}
}
} catch (IOException e) {
e.printStackTrace();
}

return false;
}

public static void main(String[] args) {
new Login().init();
}

}

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