change_pwd.java

运动会成绩管理系统

package user;

import javax.swing.*;

import java.sql.*;
import java.awt.Color;
import java.awt.TextField;
import java.awt.event.*;

import javax.swing.JFrame;

public  class change_pwd extends JFrame implements ActionListener
{
	 
	private static final long serialVersionUID = 1L;
	
	  JPanel cp;
	
	  ImageIcon icon=new ImageIcon("picture/29.jpg");
	  JLabel tp=new JLabel(icon,JLabel.CENTER);
	  JLabel j1=new JLabel("账户名   : ");
	  JLabel j2=new JLabel("原始密码: ");
	  JLabel j3=new JLabel("新密码  ：");
	  JLabel j4=new JLabel("确认密码：");
	  JButton b1=new JButton("修改");
	  JButton b2=new JButton("取 消");
	  TextField t1=new TextField(20);
	  TextField t2=new TextField(16);
	  TextField t3=new TextField(16);
	  TextField t4=new TextField(16);
	  
	  public change_pwd() 
	  {try{
		  Init();
	  }catch(Exception err){err.printStackTrace();}}
		  
		  
		  private void Init() throws Exception{
		   cp=(JPanel) this.getContentPane();
		   cp.setLayout(null);
		   this.setTitle("用户密码修改");
		   this.setResizable(false);
		   this.setSize(420,400);
		   
		   j1.setBounds(80,40,100,30);
		   j1.setFont(new java.awt.Font("Dialog",2,20));
		   j1.setForeground(new Color(250,0,0));
		   
		   j2.setBounds(80,90,100,30);
		   j2.setFont(new java.awt.Font("Dialog",2,20));
		   j2.setForeground(new Color(250,0,0));
		   
		   j3.setBounds(80,140,100,30);
		   j3.setFont(new java.awt.Font("Dialog",2,20));
		   j3.setForeground(new Color(250,0,0));
		   
		   j4.setBounds(80,190,100,30);
		   j4.setFont(new java.awt.Font("Dialog",2,20));
		   j4.setForeground(new Color(250,0,0));
		   
		  
		   t1.setBounds(200,40,120,30);
		   t1.setFont(new java.awt.Font("Dialog",0,15));
		   t1.addActionListener(this);
		   
		   t2.setBounds(200,90,120,30);
		   t2.setFont(new java.awt.Font("Dialog",0,14));
		   t2.addActionListener(this);
		   
		   t3.setBounds(200,140,120,30);
		   t3.setFont(new java.awt.Font("Dialog",0,14));
		   t3.addActionListener(this);
		   
		   t4.setBounds(200,190,120,30);
		   t4.setFont(new java.awt.Font("Dialog",0,14));
		   t4.addActionListener(this);
		   
		   b1.setBounds(80,280,90,30);
		   b1.setFont(new java.awt.Font("Dialog",0,15));
		   b1.addActionListener(this);
		   b2.setBounds(230,280,90,30);
		   b2.setFont(new java.awt.Font("Dialog",0,15));
		   b2.addActionListener(this);
		   
		   tp.setText("");
		   tp.setSize(420,400);
		   
		   cp.add(j1,null);
		   cp.add(j2,null);
		   cp.add(j3,null);
		   cp.add(j4,null);
		   cp.add(t1,null);
		   cp.add(t2,null);
		   cp.add(t3,null);
		   cp.add(t4,null);
		   cp.add(b1,null);
		   cp.add(b2,null);
		  
		   cp.add(tp,null);
		   t2.setEchoChar('*');
		   t3.setEchoChar('*');
		   t4.setEchoChar('*');
		  
		  this.setVisible(true);
		  this.setLocationRelativeTo(null);
		  
		  	  
	  }
	  public void actionPerformed(ActionEvent e)
	  {   if(e.getSource()==b2){this.dispose();}
	      else if(t1.getText().equals("")){JOptionPane.showMessageDialog(null,"请输入用户名!");t1.requestFocus();t2.setText("");}
	      else if(e.getSource()==t1){t2.requestFocus();}
	      else if(t2.getText().equals("")){JOptionPane.showMessageDialog(null,"请输入原密码！");t2.requestFocus();}
	      else if(e.getSource()==t2){t3.requestFocus();}
	      else if(t3.getText().equals("")){JOptionPane.showMessageDialog(null,"请输入新密码！");t3.requestFocus();}
	      else if(e.getSource()==t3){t4.requestFocus();}
	      else if(t4.getText().equals("")){JOptionPane.showMessageDialog(null,"请输入确认密码！");t4.requestFocus();}
	      else if(e.getSource()==t4||e.getSource()==b1)
		  try{
		          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
			      Connection con=DriverManager.getConnection("jdbc:odbc:yundonghui","sa","123");
			      Statement ps=con.createStatement();
 
			      ResultSet rs=ps.executeQuery("select * from 用户管理 where 用户名='"+t1.getText().trim()+"'and 密码='"+t2.getText().trim()+"'");

	           if(!rs.next())
			      {   
				   JOptionPane.showMessageDialog(null,"用户名或密码错误，请重新输入!");
			  	   t1.setText("");t2.setText("");t3.setText("");t4.setText("");t1.requestFocus();
			      }
		      else
			      {
				     if(t3.getText().equals(t4.getText()))
				     { 
				    	 if(t3.getText().length()>=6&&t3.getText().length()<=16)
				    	 {
				              int v=JOptionPane.showConfirmDialog(this, "确认修改吗？","密码修改确认",JOptionPane.OK_CANCEL_OPTION);
				              if(v==JOptionPane.OK_OPTION)
				                {
				                 ps.executeUpdate("Update 用户管理 set 密码='"+t3.getText().trim()+"'where 用户名='"+t1.getText().trim()+"'");
				                 JOptionPane.showMessageDialog(null, "修改成功！");this.dispose();
				                } 
				               else{this.dispose();}
				           }
				    	  else{JOptionPane.showMessageDialog(null, "密码必须是由6~16位之间的字符或数字组成！");t3.setText("");t4.setText("");t3.requestFocus();}
				    
				    	}
				      else{JOptionPane.showMessageDialog(null,"两次密码输入不一致，请重新输入！");t3.setText("");t4.setText("");t3.requestFocus();}
		
			       }
		       }
		      catch (Exception err) { err.printStackTrace();JOptionPane.showMessageDialog(null,"数据库连接出错！"); }
		  
		  }

	  public static void main(String args[])
	  {new change_pwd(); }
                          

}