Java开发网 - 我刚刚学JAVA程序请老手帮我``把程序加精功能`

Topic: 我刚刚学JAVA程序请老手帮我``把程序加精功能`

1.我刚刚学JAVA程序请老手帮我``把程序加精功能`

Posted by: widlb
Posted on: 2005-09-23 02:11

我是个刚刚学习JAVA的菜菜鸟``我知道``要多学多写``多多请教```
``请各位``` 老手门帮帮我把这个```程序加精`` 可能还有错误``请原谅```
``有两点不明白``一个就是怎么```讲密码输入``的字符型数据``转换成*来代替``第2个就是``` 为所输入的数据`````怎么就是`数据从数据库中``查询到的数据了````
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;

public class User implements ActionListener
{
  JFrame frame = new JFrame("王小明是帅哥");
JTabbedPane tp = new JTabbedPane();
// 注册界面
  JPanel p1,p11,p12,p13;
  JLabel label11,label12;
  JTextField text11,text12,text13;
  JButton button11;

//   登陆界面
JPanel p2,p21,p23;
  JLabel label21,label22;
  JTextField text21,text22;
  JButton button21,button22;

public User()
{
label11=new JLabel("姓名");
    text11=new JTextField(10);
    JPanel p11 = new JPanel();
    p11.setLayout(new FlowLayout());
    p11.add(label11);
    p11.add(text11);

label12=new JLabel("密码");
    text12=new JTextField(10);
    JPanel p12 = new JPanel();
    p12.setLayout(new FlowLayout());
    p12.add(label12);
    p12.add(text12);


    button11=new JButton("确定");
    JPanel p13 = new JPanel();
    p13.setLayout(new FlowLayout());
    p13.add(button11);


p1 = new JPanel();
    p1.setLayout(new GridLayout(0,1));
    p1.add(p11);
    p1.add(p12);
    p1.add(p13);


  tp.addTab("注册",p1);

  label21=new JLabel("用户名");
    text21=new JTextField(11);
    JPanel p21 = new JPanel();
    p21.setLayout(new FlowLayout());
    p21.add(label21);
    p21.add(text21);

label22=new JLabel("密码");
    text22=new JTextField(11);
    JPanel p22 = new JPanel();
    p22.setLayout(new FlowLayout());
    p22.add(label22);
    p22.add(text22);

button21=new JButton("确定");
button22=new JButton("清楚");
    JPanel p23= new JPanel();
    p23.setLayout(new FlowLayout());
    p23.add(button21);
   p23.add(button22);





p2 = new JPanel();
    p2.setLayout(new GridLayout(0,1));
    p2.add(p21);
    p2.add(p22);
    p2.add(p23);


  tp.addTab("登陆",p2);


frame.getContentPane().add(tp);
    frame.setSize(500,350);
    frame.show();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    button11.addActionListener(this);
    button21.addActionListener(this);
    button22.addActionListener(this);
}

public void actionPerformed(ActionEvent ae)
{
  if(ae.getSource()==button11)
    {
      String []list = new String[2];
      list[0] = text11.getText().trim();
      list[1] = text12.getText().trim();


      String sqlStr = "insert into biao(姓名,输入密码,再次输入密码) values('"+list[0]+"','"+list[1]+"','"+list[2]+"')";

      System.out.println (sqlStr);


this.dbConnection(sqlStr);
      JOptionPane.showMessageDialog(null,"添加成功");
    }


  if(ae.getSource()==button21)
    {
      String []list = new String[1];
      list[0] = text21.getText().trim();
      String sqlStr = "select * from biao";

      if(!"".equals(list[0])) sqlStr += " where 用户名='"+list[0]+"'";
      System.out.println (sqlStr);

      ResultSet rs = null;
      rs = this.dbConnection(sqlStr);

    try {
        while(rs.next())
        {
          String [] list1 = new String[2];
          list1[0] = rs.getString(1);
          list1[1] = rs.getString(2);


          text21.setText(list[0]);
          text22.setText(list[1]);
        }
     }
     catch (Exception ex)
     {
       ex.printStackTrace();
       }
}

    if(ae.getSource()==button22)
    {
      System.out.println ("This is 22");
    }
  }

  public ResultSet dbConnection(String s)
  {
    Connection con=null;
    Statement sql=null;
    ResultSet rs=null;
    try
    {
      Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    }
    catch(ClassNotFoundException cnfe)
    {
      JOptionPane.showMessageDialog(null,"驱动错误！");
    }
    try
    {
      String urlStr = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=chengjiku.mdb";
      con = DriverManager.getConnection(urlStr);
      sql =con.createStatement();

    }
    catch(SQLException sql1)
    {
      JOptionPane.showMessageDialog(null,"数据源错误！");
    }
    try
    {
      if(s.toLowerCase().startsWith("select"))
      {
         rs=sql.executeQuery(s);
      }
      else
      {
         sql.executeUpdate(s);
      }
    }
    catch(SQLException sql2)
    {
      JOptionPane.showMessageDialog(null,"数据表操作错误！");
    }

    return rs;
  }


  public static void main(String[] args) {
    // TODO: Add your code here
    new User();
  }
}

2.Re:我刚刚学JAVA程序请老手帮我``把程序加精功能` [Re: widlb]	Copy to clipboard
Posted by: widlb Posted on: 2005-09-23 22:31 每人看``还是我很很菜啊`` ``` 郁闷````

3.Re:我刚刚学JAVA程序请老手帮我``把程序加精功能` [Re: widlb]	Copy to clipboard
Posted by: chenyoufan Posted on: 2005-09-27 13:29 知道新手的痛苦，我也是新手，55555 第一个问题用JPasswordField test = new JPasswordField(); 第二个问题没看懂是什么意思一一！解释一下........LZ