Java项目7之学生信息管理界面

设计一个学生信息管理界面，如图所示。
要求系统的使用要进行身份验证，即在开始显示主界面之前，先显示登录窗口，进行用户名和密码的检验，只有通过验证的才能看到主界面，否则3次机会后程序结束不允许使用该系统。

package 实验七;
/**
 * （1）实现了登录后关闭登录窗口，但程序不退出
 * （2）错误三次自动退出
 * （3）实现了录入信息功能，录入时显示全部人信息
 * （4）实现了查询功能，选中单个条件或者多个条件时都能查询
 * （5）当录入的信息不全时，有窗口提示
 * （6）当点查询时，没有选中条件，有窗口提示
 */
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class Management extends JFrame implements ActionListener{
	JPanel jp1=new JPanel();
	JPanel jp2=new JPanel();
	JPanel jp3=new JPanel();
	JLabel jl1=new JLabel("账号");
	JLabel jl2=new JLabel("密码");
	JTextField jtf=new JTextField(10);//账号：root
	JPasswordField jpf=new JPasswordField(10);//密码：root
	JButton jb=new JButton("登录");
	int erro=0;//记录错误次数
	private String password;//密码
	
	public Management() {
		//设置布局管理
		this.setLayout(new GridLayout(3,1));
		//加入组件
		jp1.add(jl1);
		jp1.add(jtf);
		jp2.add(jl2);
		jp2.add(jpf);
		jp3.add(jb);
		jb.addActionListener(this);
		
		//加入到JFrame
		this.add(jp1);
		this.add(jp2);
		this.add(jp3);

		//属性
		this.setSize(300,200);
		this.setTitle("登录");
		this.setLocationRelativeTo(null);
		this.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
		this.setVisible(true);
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		password=String.valueOf(jpf.getPassword()); 
		if(e.getSource().equals(jb)&&erro<3)
		{
			if(!jtf.getText().equals("root")||!password.equals("root"))
			{
				JOptionPane.showMessageDialog(null, "账号或者密码错误", "提示", JOptionPane.INFORMATION_MESSAGE);
				erro++;
				if(erro==3)
					System.exit(0);
			}
			else 
			{
				this.dispose();//关闭窗口，但程序不退出
				new NewSystem();
			}
		}
		
	}
	public static void main(String[] args) {
		new Management();
//		new NewSystem();//测试
	}
}
class NewSystem extends JFrame implements ActionListener
{
	JPanel jp1=new JPanel();
	JPanel jp11=new JPanel();
	JPanel jp12=new JPanel();
	JPanel jp13=new JPanel();
	JPanel jp14=new JPanel();
	JPanel jp15=new JPanel();
	JPanel jp16=new JPanel();
	JPanel jp2=new JPanel();
	JPanel jp21=new JPanel();
	JPanel jp22=new JPanel();
	JPanel jp23=new JPanel();
	JPanel jp24=new JPanel();
	JPanel jp3=new JPanel();
	JPanel jp4=new JPanel();
	JPanel jp5=new JPanel();
	JLabel jl1=new JLabel("学号");
	JLabel jl1s=new JLabel("学号");
	JLabel jl2=new JLabel("姓名");
	JLabel jl3=new JLabel("出生日期");
	JLabel jl4=new JLabel("系别");
	JLabel jl4s=new JLabel("系别");
	JTextField jtf1=new JTextField(10);
	JTextField jtf2=new JTextField(10);
	JTextField jtf3=new JTextField(10);
	String []birth= {"1998-01-01","1999-01-01","2000-01-01"};
	JComboBox jcb1=new JComboBox(birth);
	String []department={"计算机","软件","物联"};
	JComboBox jcb2=new JComboBox(department);
	JComboBox jcb3=new JComboBox(department);
	JRadioButton jrb1=new JRadioButton("男");
	JRadioButton jrb2=new JRadioButton("女");
	ButtonGroup bg1=new ButtonGroup();
	JRadioButton jrb3=new JRadioButton("男");
	JRadioButton jrb4=new JRadioButton("女");
	ButtonGroup bg2=new ButtonGroup();
	JButton jb1=new JButton("确认输入");
	JButton jb2=new JButton("查询");
	JButton jb4=new JButton("清除");
	JButton jb3=new JButton("显示所有记录");
	JTextArea jta=new JTextArea(35,60);
	
	Student s[]=new Student[50];
	static int number=0;//学生人数
	
	public NewSystem()
	{
		//jpanel加入边框线
		jp1.setBorder(BorderFactory.createTitledBorder("信息录入"));
		jp2.setBorder(BorderFactory.createTitledBorder("查询"));
		
		//信息录入部分
		jp1.setLayout(new GridLayout(6,1));
		jp11.add(jl1);
		jp11.add(jtf1);
		jp12.add(jl2);
		jp12.add(jtf2);
		jp13.add(jp3);
		jp13.add(jl3);
		jp13.add(jcb1);
		bg1.add(jrb1);
		bg1.add(jrb2);
		jp14.add(jrb1);
		jp14.add(jrb2);
		jp14.setBorder(BorderFactory.createTitledBorder("性别"));
		jp15.add(jl4);
		jp15.add(jcb2);
		jp16.add(jb1);

		//加入信息录入jp1
		jp1.add(jp11);
		jp1.add(jp12);
		jp1.add(jp13);
		jp1.add(jp14);
		jp1.add(jp15);
		jp1.add(jp16);
		
		//查询部分
		jp2.setLayout(new GridLayout(4,1));
		jp21.add(jl1s);
		jp21.add(jtf3);
		bg2.add(jrb3);
		bg2.add(jrb4);
		jp22.add(jrb3);
		jp22.add(jrb4);
		jp22.setBorder(BorderFactory.createTitledBorder("性别"));
		jp23.add(jl4s);
		jp23.add(jcb3);
		jp24.add(jb2);
		jp24.add(jb4);
		//加入查询jp2中
		jp2.add(jp21);
		jp2.add(jp22);
		jp2.add(jp23);
		jp2.add(jp24);
		
		//显示记录部分
		jp5.setLayout(new FlowLayout());
		jp5.add(jb3);
		jp5.add(jta);
		
		//临时加入的panel
		JPanel jp=new JPanel();
		jp.setLayout(new GridLayout(2,1));;
		jp.add(jp1);
		jp.add(jp2);
		
		//布局
		this.setLayout(new BorderLayout());
		//加入组件
		this.add(jp,BorderLayout.WEST);
		this.add(jp5,BorderLayout.CENTER);
		
		//设置下拉框初选值为空
		jcb1.setSelectedItem(null);
		jcb2.setSelectedItem(null);
		jcb3.setSelectedItem(null);
		
		//加入事件
		jb1.addActionListener(this);
		jb2.addActionListener(this);
		jb3.addActionListener(this);
		jb4.addActionListener(this);
		
		//属性
		this.setSize(880,750);
		this.setTitle("学生信息系统");
		this.setLocationRelativeTo(null);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setVisible(true);
		
		//初始化，不然后面出现指针异常
		for(int i=0;i<50;i++)
		{
			s[i]=new Student();
		}
		
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource().equals(jb1))//录入
		{
			if(number<=50)
			{
				
				if(jtf1.getText().isEmpty()||jtf1.getText().isEmpty()||jcb1.getSelectedIndex()==-1
						||(!jrb1.isSelected()&&!jrb2.isSelected())||jcb2.getSelectedIndex()==-1)
					JOptionPane.showMessageDialog(null, "请输入完整信息", "提示", JOptionPane.INFORMATION_MESSAGE);
				else 
				{
					s[number].id=jtf1.getText();
					s[number].name=jtf2.getText();
					switch (jcb1.getSelectedIndex()) {
					case 0:s[number].birth="1998-01-01";break;
					case 1:s[number].birth="1999-01-01";break;
					case 2:s[number].birth="2000-01-01";break;
					default:break;
					};
					if(jrb1.isSelected())
					{
						s[number].sex="男";
					}
					if(jrb2.isSelected())
					{
						s[number].sex="女";
					}
					switch (jcb2.getSelectedIndex()) {
					case 0:s[number].subject="计算机";break;
					case 1:s[number].subject="软件";break;
					case 2:s[number].subject="物联";break;
					default:break;
					};
					number++;
				}
			}
			print();
			
		}
		if(e.getSource().equals(jb2))//查询
		{
			jta.setText("学号\t"+"姓名\t"+"出生日期\t"+"性别\t"+"系别\n");
			find();
		}
		if(e.getSource().equals(jb3))//显示所有
		{
			print();
		}
		if(e.getSource().equals(jb4))//清除
		{
			jtf3.setText("");
			bg2.clearSelection();
			jcb3.setSelectedIndex(-1);
		}
	}
	
	void find()//查询
	{
		String ids=null;
		String sexs=null;
		String subjects=null;
			if(jtf3.getText().isEmpty()&&(!jrb3.isSelected()&&!jrb4.isSelected())&&jcb3.getSelectedIndex()==-1)
					JOptionPane.showMessageDialog(null, "请输入要查询的相关信息", "提示", JOptionPane.INFORMATION_MESSAGE);
			
			else 
			{
				if(!jtf3.getText().isEmpty())
					ids=jtf3.getText();
				if(jrb3.isSelected())
				{
					sexs="男";
				}
				if(jrb4.isSelected())
				{
					sexs="女";
				}
				switch (jcb3.getSelectedIndex())
				{
				case -1:;break;
				case 0:subjects="计算机";break;
				case 1:subjects="软件";break;
				case 2:subjects="物联";break;
				};
			}
			//七种情况
			if(ids!=null&&sexs==null&&subjects==null)//1
			{
				for(int i=0;i<number;i++)
				{
					if(s[i].id.equals(ids))
						jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
				}
			}
			else if(ids==null&&sexs!=null&&subjects==null)//2
			{
				for(int i=0;i<number;i++)
				{
					if(s[i].sex.equals(sexs))
						jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
				}
			}
			else if(ids==null&&sexs==null&&subjects!=null)//3
			{
				for(int i=0;i<number;i++)
				{
					if(s[i].subject.equals(subjects))
						jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
				}
			}
			else if(ids!=null&&sexs!=null&&subjects==null)//4
			{
				for(int i=0;i<number;i++)
				{
					if(s[i].id.equals(ids)&&s[i].sex.equals(sexs))
						jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
				}
			}
			else if(ids!=null&&sexs==null&&subjects!=null)//5
			{
				for(int i=0;i<number;i++)
				{
					if(s[i].id.equals(ids)&&s[i].subject.equals(subjects))
						jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
				}
			}
			else if(ids==null&&sexs!=null&&subjects!=null)//6
			{
				for(int i=0;i<number;i++)
				{
					if(s[i].sex.equals(sexs)&&s[i].subject.equals(subjects))
						jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
				}
			}
			else if(ids!=null&&sexs!=null&&subjects!=null)//7
			{
				for(int i=0;i<number;i++)
				{
					if(s[i].id.equals(ids)&&s[i].sex.equals(sexs)&&s[i].subject.equals(subjects))
						jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
				}
			}
		
	}
	
	void print()//显示函数
	{
		jta.setText("学号\t"+"姓名\t"+"出生日期\t"+"性别\t"+"系别\n");
		for(int i=0;i<number;i++)
		{
			jta.append(s[i].id+"\t"+s[i].name+"\t"+s[i].birth+"\t"+s[i].sex+"\t"+s[i].subject+"\n");
		}
	}
	class Student
	{
		String id;
		String name;
		String birth;
		String sex;
		String subject;
	}
}

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