topdao.java

大象购物管理程序

package com.shopping.dao;

import java.sql.*;
import java.util.*;

import com.comm.db.*;
import com.comm.vo.*;

public class TopDao {

    public void add(GenericVO gvo) throws SQLException {
        String name = gvo.getItemStr("NAME");
        String type = gvo.getItemStr("TYPE");
        if (type.length() == 0) {
            type = "1";
        }
        String sql = "INSERT INTO top (name, type) VALUES ('" + name + "', " +
                     type + ")";
        DBFactory.getDBI().execute(sql);
    }

    public void modify(GenericVO gvo) throws SQLException {
        String topId = gvo.getItemStr("TOP_ID");
        String name = gvo.getItemStr("NAME");
        String sql = "UPDATE top SET name = '" + name + "' WHERE top_id=" +
                     topId;
        DBFactory.getDBI().execute(sql);
    }

    public void delete(int topId) throws SQLException {
        String sql = "DELETE FROM top WHERE top_id=" + topId;
        DBFactory.getDBI().execute(sql);
    }

    public Vector get() throws SQLException {
        String sql = "SELECT * FROM top ORDER BY top_id";
        return DBFactory.getDBI().getResult(sql);
    }

    public Vector getByType(int type) throws SQLException {
        String sql = "SELECT * FROM top WHERE type=" + type +
                     " ORDER BY top_id";
        return DBFactory.getDBI().getResult(sql);
    }

    public GenericVO getDetail(int topId) throws SQLException {
        String sql = "SELECT * FROM top WHERE top_id=" + topId;
        Vector r = DBFactory.getDBI().getResult(sql);
        if (r.size() > 0) {
            return (GenericVO) r.elementAt(0);
        } else {
            return null;
        }
    }
}