连接SQLServer——Bean

package QueryBean;

import java.sql.*;
public class myjdbc {
  Connection conn;
     ResultSet rs;

     public myjdbc()
     {
         rs = null;
         try
         {
             Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
         }
         catch(ClassNotFoundException e)
         {
             System.out.println("sql_data():" + e.getMessage());
         }
     }
     //执行查询的方法
     public ResultSet executeQuery(String sql)
     {
         try
         {
             Connection cnn = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1433;databaseName=guanghui", "sa", "");  //账号"sa"密码为空
             Statement stmt = cnn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
             //Statement stmt = cnn.createStatement();
             rs = stmt.executeQuery(sql);
         }
         catch(Exception ex)
         {
             System.out.println("sql_data.executeQuery:" + ex.getMessage());
         }
         return rs;
        
     }
     //执行添加记录
     public void executeUpdate(String sql)
        throws Exception
    {
        try
        {
            Connection cnn = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1433;databaseName=guanghui", "sa", "");
            Statement st = cnn.createStatement();
            st.executeUpdate(sql);
        }
        catch(SQLException ex)
        {
            System.out.println("sql_data.executeUpdate:" + ex.getMessage());
        }
    }

 
}