代码如下：
# SQlite3应用：简单订单管理系统
import sqlite3
def getConnection(): # 连接数据库
dbstr = 'C:\\sqlite3\\test.db'
con = sqlite3.connect(dbstr)
cur = con.cursor()
sqlstr = ("create table if not exists orderl(order_id integer primary key,order_dec varchar(20),price float,order_num integer,address varchar(30))")
cur.execute(sqlstr)
return con
def showAllData(): # 显示所有内容
print("------------display record------------")
dbinfo = getConnection()
cur = dbinfo.cursor()
cur.execute("select * from orderl")
for item in cur.fetchall():
print(item)
cur.close()
dbinfo.close()
def getOderListInfo(): # 获得订单数据
orderId = int(input("Please enter Order ID:"))
orderDec = input("Please enter Oder description:")
price = eval(input("Please enter price:"))
Ordernum = eval(input("Please enter number:"))
address = input("Please enter address:")
return orderId, orderDec, price, Ordernum, address
def addRec(): # 添加记录
print("------------add record------------")
record = getOderListInfo()
dbinfo = getConnection()
cur = dbinfo.cursor()
print(record[0], record[1], record[2], record[3], record[4])
cur.execute("insert into orderl values(?,?,?,?,?)",
(record[0], record[1], record[2], record[3], record[4]))
dbinfo.commit()
print("------------add record success------------")
showAllData()
cur.close()
dbinfo.close()
def delRec(): # 删除记录
print("------------delete record------------")
dbinfo = getConnection()
cur = dbinfo.cursor()
choice = input("Please enter deleted order_id:")
cur.execute("delete from orderl where order_id="+choice)
dbinfo.commit()
print("------------delete record success------------")
showAllData()
cur.close()
dbinfo.close()
def modifyRec(): # 修改记录
print("------------change record------------")
dbinfo = getConnection()
cur = dbinfo.cursor()
choice = input("Please enter change order_id:")
record = getOderListInfo()
cur.execute("update orderl set order_id=?,order_dec=?,price=?,order_num=?,address=? where order_id=" +
choice, (record[0], record[1], record[2], record[3], record[4]))
dbinfo.commit()
showAllData()
print("------------change record success------------")
cur.close()
dbinfo.close()
def searchRec(): # 查找记录
print("------------search record------------")
dbinfo = getConnection()
cur = dbinfo.cursor()
choice = input("Please enter change order_id:")
cur.execute("select * from orderl where order_id=" + choice)
dbinfo.commit()
print("------------search record success------------")
for row in cur:
print(row[0], row[1], row[2], row[3], row[4])
cur.close()
dbinfo.close()
def continueIf(): # 判断是否继续操作
choice = input("continue(y/n)?")
if str.lower(choice) == 'y':
flag = 1
else:
flag = 0
return flag
if __name__ == "__main__":
getConnection()
flag = 1
while flag:
print("------------OrderItem Manage System------------")
menu = '''
1. Append Record
2. Delete Record
3. Change Record
4. Search Record
Please enter order number:
'''
choice = input(menu)
if choice == '1':
addRec()
flag = continueIf()
elif choice == '2':
delRec()
flag = continueIf()
elif choice == '3':
modifyRec()
flag = continueIf()
elif choice == '4':
searchRec()
flag = continueIf()
else:
print("order number error!!!")