newtype.java

自己做的一个企业招标系统,B/S结构。开发工具Eclipse

/**
 * 
 */
package com.centralsoft.zhaobiao.admin;

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

import com.centralsoft.zhaobiao.qtdataguanli.*;
import com.centralsoft.zhaobiao.util.*;
/**
 * @author zw
 *
 */
public class NewType {
	public NewType() {
	}
	/**
	 * 添加一个新类别
	 * @param type
	 */
	public void addType(Type type) {
		dataBase db = new dataBase();
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		long maxid = 0;
		conn = db.getConnection();
		String sqlResultSet = "select max(type_id) as maxid from type";
		String sqlPrepared = "inset into type (type_id,type_name,type_content) " +
				"values (?,?,?)";
		rs = db.getResultSet(sqlResultSet);
		try {
			if (rs.next()) {
				maxid = rs.getLong("maxid") + 1;
			} else {
				maxid = 1;
			}
			System.out.println("添加一个新类别id"+maxid);
		} catch (Exception e) {
			System.out.println(e.getMessage());
		} finally {
			try {
				if (rs != null) {
					rs.close();
				}
			} catch (Exception e) {
				System.out.println(e.getMessage());
			}
		}
		try {
			ps = conn.prepareStatement(sqlPrepared);
			ps.setLong(1,maxid);
			ps.setString(2,type.getType_name());
			ps.setString(3,type.getType_content());
			ps.executeUpdate();
		} catch (Exception e) {
			System.out.println(e.getMessage());
		} finally {
			try {
				if (ps != null) {
					ps.close();
				}
				db.closeConn();
			} catch (Exception e) {
				System.out.println(e.getMessage());
			}
		}
	}
	/**
	 * 获得所有的类别集合
	 * @return
	 */
	public Vector getTypeList() {
		Vector list = new Vector();
		dataBase db = new dataBase();
		ResultSet rs = null;
		String sql = "select * from type";
		rs = db.getResultSet(sql);
		try {
			while (rs.next()) {
				Type type = new Type();
				type.setType_id(rs.getLong("type_id"));
				type.setType_name(rs.getString("type_name"));
				type.setType_content(rs.getString("type_content"));
				list.add(type);
			}
		} catch (Exception e) {
			System.out.println(e.getMessage());
		} finally {
			try {
				if (rs != null) {
					rs.close();
				}
				db.closeConn();
			} catch (Exception e) {
				System.out.println(e.getMessage());
			}
		}
		return list;
	}
}