carbdservice.java~6~

车辆管理系统~其中包括了主要的增删改查的各项基本功能

package bigwork.db;
import java.sql.*;

public class CarBDService {
    Connection con = new DB().getConn();
    public String[][] ShowSearch(){
        String[][] datas = null;
        Statement stmt = null;
        try {
            stmt = con.createStatement();

            int count = 0;
            ResultSet rs = stmt.executeQuery("select count(*) from CarBD");
            if (rs.next()) {
                count = rs.getInt(1);
            }
            rs.close();
            datas = new String[count][];
            int i = 0;
            rs = stmt.executeQuery("select * from CarBD");
            while (rs.next()) {
                String number = rs.getString("CARNUMBER");
                String type = rs.getString("CARTYPE");
                String STATE = rs.getString("CARSTATE");
                datas[i] = new String[] {number,type,STATE};

                i++;
                System.out.println(number + "," + type + "," + STATE);
            }
            rs.close();
            stmt.close();
            con.close();

        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        return datas;
}

    public boolean CarBDUpdate(String Carnum){
       Statement stmt = null;
       String State = "繁忙";
       String Update = "UPDATE CarBD SET CARSTATE='" + State + "' WHERE CARNUMBER=" + Carnum+ "";

   ResultSet rs=null;
   try {
       if(rs==null)
           stmt = con.createStatement();
           stmt.executeUpdate(Update);
           return true;
   } catch (SQLException ex) {
       System.out.println(ex.getMessage());
   }
   return false;

}


}