databaseinfo.java

180个针对Java初学者的简单实例,包含了180個適合與初學者的源碼實例

import javax.swing.*;
import java.sql.*;
public class DatabaseInfo extends JFrame {
  JTextArea taInfo=new JTextArea();
  public DatabaseInfo()   {
    super("数据库信息");
    setSize(300,260);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
    this.getContentPane().add(taInfo);
  }
  public void getDatabaseInfo(){
    Connection con=null;
    try {
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
   }
   catch(ClassNotFoundException ex){
     taInfo.setText(ex.getMessage());
     System.exit(-1);
   }
   try{
     String URL = "jdbc:odbc:学生信息管理";
     con = DriverManager.getConnection(URL);
     DatabaseMetaData dbmt=con.getMetaData();
     taInfo.setText("JDBC URL："+dbmt.getURL()+"\n");
     taInfo.append("JDBC 驱动程序："+dbmt.getDriverName()+"\n");
     taInfo.append("用户账号："+dbmt.getUserName()+"\n");
     taInfo.append("数据库名："+dbmt.getDatabaseProductName()+"\n");
     con.close();
   }
   catch(SQLException ex){
     taInfo.setText(ex.getMessage());
   }
  }
  public static void main(String[] args)   {
    DatabaseInfo frame = new DatabaseInfo();
    frame.getDatabaseInfo();
    frame.show();
  }
}