用JDBC实现通过APPLET连sql server[Java编程]

JDBC已经包含在JDK1.1今后的版本中了,可以实用于对数据库的拜候.

关于拜候MSSQL.成立ODBC数据源后,采取JDBC来实现对数据库的拜候操作.

相关的主要类在java.sql包中.

假定我们目前mssql上有一个库名为COMPANY,此中一张表为TB_NAME.我们但愿从这张表里按编号number取出呼应记录name.已经成立对应ODBC数据源为javadata.

但愿用一个applet完成操作.

附程序主要部份供参考.这里仅写出一个init()办法,具体的界面请用AWT实现.

import java.net.*;
import java.sql.*;
public class dbexamp extends java.applet.Applet
{
public void init(){
String url="jdbc:odbc:javadata";
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection(url,"sa","");//mssql database user SA and
password
DatabaseMetaData dma=con.getMetaData();
System.out.println("Connect to"+dma.getURL());
System.out.println(";Driver "+dma.getDriverName());
System.out.println(";Version "+dma.getDriverVersion());
System.out.println("");
Statement stmt=con.createStatement();
ResultSet rs=stmt.executeQuery("select * from company.dbo.TB_NAME where number=1");//Sql
rs.next();
String dispresult=rs.getString("name");
System.out.println(dispresult);// Instead,you can display it in Paint() or use AWT etc.
rs.close();
stmt.close();
con.close();
}
catch(SQLException ex){
System.out.println("!!!SQL Exception !!!");
while(ex!=null){
System.out.println("SQLState:"+ex.getSQLState());
System.out.println("Message:"+ex.getMessage());
System.out.println("Vendor:"+ex.getErrorCode());
ex=ex.getNextException();
System.out.println("");
}
}
catch(java.lang.Exception ex){
ex.printStackTrace();
}
}
}