diff --git a/src/backend/Recommend/Recommend.py b/src/backend/Recommend/Recommend.py
new file mode 100644
index 0000000..f38993a
--- /dev/null
+++ b/src/backend/Recommend/Recommend.py
@@ -0,0 +1,858 @@
+# 返回的json文件标识符：
+# type：0表示推荐算法返回 1表示兼容性检测返回
+# flag：0表示正常返回请求内容 1表示出现错误，为错误报告
+
+import json
+import pymysql
+
+
+class Accessories:
+  def __init__(self, name):
+    self.name = name
+    self.budget = -1
+    self.price = -1
+    self.link = ''
+    self.socket = None
+    self.length = None
+    self.height = None
+    self.size = None
+    self.m2Num = None
+
+
+class AccessoriesList:
+  def __init__(self, name):
+    self.name = name
+    self.budget = -1
+    self.price = 0
+    self.CPU = Accessories('CPU')
+    self.GPU = Accessories('GPU')
+    self.case = Accessories('case')
+    self.memory = Accessories('memory')
+    self.HDD = Accessories('HDD')
+    self.SSD = Accessories('SSD')
+    self.motherboard = Accessories('motherboard')
+    self.powerSupply = Accessories('powerSupply')
+    self.CPURadiator = Accessories('CPURadiator')
+
+
+def parse(questionAnswersData):
+  res = {}
+  res['version'] = questionAnswersData['version']
+  if(questionAnswersData['version'] == 'primary'):
+    res['Q1'] = questionAnswersData['Q1']
+    res['Q1'][0] = eval(res['Q1'][0])
+    res['Q1'][1] = eval(res['Q1'][1])
+    res['Q2'] = primaryQuestionDict['Q2'][eval(questionAnswersData['Q2'])]
+    res['Q3'] = primaryQuestionDict['Q3'][eval(questionAnswersData['Q3'])]
+    res['Q4'] = primaryQuestionDict['Q4'][eval(questionAnswersData['Q4'])]
+    res['Q5'] = eval(questionAnswersData['Q5'])
+  elif(questionAnswersData['version'] == 'advanced'):
+    res['Q1'] = questionAnswersData['Q1']
+    res['Q1'][0] = eval(res['Q1'][0])
+    res['Q1'][1] = eval(res['Q1'][1])
+    res['Q2'] = []
+    for i in questionAnswersData['Q2']:
+      k = eval(i)
+      res['Q2'].append(advancedQuestionDict['Q2'][k])
+    res['Q3'] = advancedQuestionDict['Q5'][eval(questionAnswersData['Q3'])]
+    res['Q4'] = questionAnswersData['Q4'].split()
+    res['Q5'] = advancedQuestionDict['Q5'][eval(questionAnswersData['Q5'])]
+    res['Q6'] = questionAnswersData['Q6'].split()
+    res['Q7'] = questionAnswersData['Q7'].split()
+    res['Q8'] = questionAnswersData['Q8'].split()
+    res['Q9'] = questionAnswersData['Q9'].split()
+    res['Q10'] = questionAnswersData['Q10'].split()
+    res['Q11'] = questionAnswersData['Q11'].split()
+    res['Q12'] = questionAnswersData['Q12'].split()
+    res['Q13'] = advancedQuestionDict['Q13'][eval(questionAnswersData['Q13'])]
+    res['Q14'] = advancedQuestionDict['Q14'][eval(questionAnswersData['Q14'])]
+    res['Q15'] = advancedQuestionDict['Q15'][eval(questionAnswersData['Q15'])]
+    res['Q16'] = advancedQuestionDict['Q16'][eval(questionAnswersData['Q16'])]
+    res['Q17'] = advancedQuestionDict['Q17'][eval(questionAnswersData['Q17'])]
+    res['Q18'] = advancedQuestionDict['Q18'][eval(questionAnswersData['Q18'])]
+    res['Q19'] = eval(questionAnswersData['Q19'])
+    res['Q20'] = advancedQuestionDict['Q20'][eval(questionAnswersData['Q20'])]
+    res['Q21'] = advancedQuestionDict['Q21'][eval(questionAnswersData['Q21'])]
+  else:
+    print('Error: There is no version named', questionAnswersData['version'])
+    return None
+  return res
+
+
+def check(questionAnswers):
+  errorInf = {'type': 0, 'flag': 1, 'errorList': []}
+  if(questionAnswers['Q1'][1] < 1500):
+    inf = 'Error： 给出预算上限太低，无法生成配置单'
+    errorInf['errorList'].append(inf)
+
+  if(questionAnswers['Q1'][0] > 150000):
+    inf = 'Error： 给出预算下限太高，无法生成配置单'
+    errorInf['errorList'].append(inf)
+
+  if(questionAnswers['version'] == 'primary'):
+    if((questionAnswers['Q5']*100) % 25 != 0):
+      inf = 'Error： 给出硬盘容量不是0.25的整数倍，无法生成配置单'
+      errorInf['errorList'].append(inf)
+
+  elif(questionAnswers['version'] == 'advanced'):
+    # 连接数据库
+    db = pymysql.connect("localhost", "root", "08239015",
+                         "computer_accessories")
+    # 使用cursor()方法创建一个游标对象
+    cursor = db.cursor()
+
+    # Q2
+    if('无特殊要求' in questionAnswers['Q2'] and len(questionAnswers['Q2']) > 1):
+      inf = 'Error： Q2既有高性能要求，又无特殊要求，产生冲突，无法生成配置单'
+      errorInf['errorList'].append(inf)
+
+    # Q4
+    cursor.execute("SELECT brand FROM motherboard")
+    data = cursor.fetchall()
+    for brand in questionAnswers['Q4']:
+      if((brand.upper(),) not in data):
+        inf = 'Error： 数据库中没有%s品牌，无法生成配置单' % brand
+        errorInf['errorList'].append(inf)
+
+    # Q6
+    cursor.execute("SELECT brand,card_type FROM graphics_card")
+    data = cursor.fetchall()
+    for brand in questionAnswers['Q6']:
+      if((brand.upper(), questionAnswers['Q5'].upper()) not in data):
+        inf = 'Error： 数据库中没有%s %s品牌，无法生成配置单' % questionAnswers['Q5'], brand
+        errorInf['errorList'].append(inf)
+
+    # Q7
+    cursor.execute("SELECT brand FROM memory")
+    data = cursor.fetchall()
+    # print(data)
+    for brand in questionAnswers['Q7']:
+      if((brand.upper(),) not in data):
+        inf = 'Error： 数据库中没有%s品牌，无法生成配置单' % brand
+        errorInf['errorList'].append(inf)
+
+    # Q8
+    cursor.execute("SELECT brand FROM ssd")
+    data = cursor.fetchall()
+    # print(data)
+    for brand in questionAnswers['Q8']:
+      # print(brand.upper())
+      if((brand.upper(),) not in data):
+        inf = 'Error： 数据库中没有%s品牌，无法生成配置单' % brand
+        errorInf['errorList'].append(inf)
+
+    # Q9
+    cursor.execute("SELECT brand FROM hdd")
+    data = cursor.fetchall()
+    for brand in questionAnswers['Q9']:
+      if((brand.upper(),) not in data):
+        inf = 'Error： 数据库中没有%s品牌，无法生成配置单' % brand
+        errorInf['errorList'].append(inf)
+
+    # Q10
+    cursor.execute("SELECT brand FROM computer_case")
+    data = cursor.fetchall()
+    for brand in questionAnswers['Q10']:
+      if((brand.upper(),) not in data):
+        inf = 'Error： 数据库中没有%s品牌，无法生成配置单' % brand
+        errorInf['errorList'].append(inf)
+
+    # Q11
+    cursor.execute("SELECT brand FROM cpu_radiator")
+    data = cursor.fetchall()
+    for brand in questionAnswers['Q11']:
+      if((brand.upper(),) not in data):
+        inf = 'Error： 数据库中没有%s品牌，无法生成配置单' % brand
+        errorInf['errorList'].append(inf)
+
+    # Q12
+    cursor.execute("SELECT brand FROM power_supply")
+    data = cursor.fetchall()
+    for brand in questionAnswers['Q12']:
+      if((brand.upper(),) not in data):
+        inf = 'Error： 数据库中没有%s品牌，无法生成配置单' % brand
+        errorInf['errorList'].append(inf)
+
+    # Q19
+    if((questionAnswers['Q19']*100) % 25 != 0):
+      inf = 'Error： 给出硬盘容量不是0.25的整数倍，无法生成配置单'
+      errorInf['errorList'].append(inf)
+
+    # 关闭游标和数据库的连接
+    cursor.close()
+    db.close()
+
+  if(errorInf['errorList'] != []):
+    # 返回报错信息
+    res = open('result.json', 'w', encoding='utf-8')
+    print(errorInf)
+    json.dump(errorInf, res, ensure_ascii=False)
+    res.close()
+    exit(0)
+
+
+def calculateBudget(listX, CPUPercent, motherboardPercent, memoryPercent, SSDPercent, GPUPercent, casePercent,
+                    powerSupplyPercent, CPURadiatorPercent, HDDPercent):
+  listX.CPU.budget = round(CPUPercent * listX.budget)
+  listX.motherboard.budget = round(motherboardPercent * listX.budget)
+  listX.memory.budget = round(memoryPercent * listX.budget)
+  listX.SSD.budget = round(SSDPercent * listX.budget)
+  listX.GPU.budget = round(GPUPercent * listX.budget)
+  listX.case.budget = round(casePercent * listX.budget)
+  listX.powerSupply.budget = round(powerSupplyPercent * listX.budget)
+  listX.CPURadiator.budget = round(CPURadiatorPercent * listX.budget)
+  listX.HDD.budget = round(HDDPercent * listX.budget)
+  return listX
+
+
+def preferParse(preDict, questionAnswers):
+  if(questionAnswers['version'] == 'primary'):
+    # Q3
+    if(questionAnswers['Q3'] == '无光'):
+      preDict['CPURadiatorRGB'] = '无'
+      preDict['GPURGB'] = '无'
+      preDict['memoryVest'] = '马甲条'
+    elif(questionAnswers['Q3'] == 'RGB'):
+      preDict['CPURadiatorRGB'] = 'RGB'
+      preDict['GPURGB'] = '支持RGB'
+      preDict['memoryVest'] = 'RGB灯条'
+    elif(questionAnswers['Q3'] == 'ARGB'):
+      preDict['CPURadiatorRGB'] = 'ARGB'
+      preDict['GPURGB'] = '支持RGB'
+      preDict['memoryVest'] = 'RGB灯条'
+
+    # Q4
+    if(questionAnswers['Q4'] != '无要求'):
+      preDict['caseSize'] = questionAnswers['Q4']
+      preDict['MBSize'] = questionAnswers['Q4']
+      if(preDict['caseSize'] == 'MINI-ITX'):
+        preDict['powerSupplySize'] = 'SFX'
+      else:
+        preDict['powerSupplySize'] = 'ATX'
+
+    # Q5
+    if(questionAnswers['Q5'] != None):
+      preDict['hardDiskCapacity'] = questionAnswers['Q5']
+    else:
+      preDict['hardDiskCapacity'] = 0.125
+
+  elif(questionAnswers['version'] == 'advanced'):
+    # Q3
+    preDict['CPUBrand'] = questionAnswers['Q3']
+
+    # Q4
+    brandList = questionAnswers['Q4']
+    for brand in brandList:
+      preDict['MBBrand'].append(brand)
+
+    # Q5
+    preDict['GPUAN'] = questionAnswers['Q5']
+
+    # Q6
+    brandList = questionAnswers['Q6']
+    for brand in brandList:
+      preDict['GPUBrand'].append(brand)
+
+    # Q7
+    brandList = questionAnswers['Q7']
+    for brand in brandList:
+      preDict['memoryBrand'].append(brand)
+
+    # Q8
+    brandList = questionAnswers['Q8']
+    for brand in brandList:
+      preDict['SSDBrand'].append(brand)
+
+    # Q9
+    brandList = questionAnswers['Q9']
+    for brand in brandList:
+      preDict['HDDBrand'].append(brand)
+
+    # Q10
+    brandList = questionAnswers['Q10']
+    for brand in brandList:
+      preDict['caseBrand'].append(brand)
+
+    # Q11
+    brandList = questionAnswers['Q11']
+    for brand in brandList:
+      preDict['CPURadiatorBrand'].append(brand)
+
+    # Q12
+    brandList = questionAnswers['Q12']
+    for brand in brandList:
+      preDict['powerSupplyBrand'].append(brand)
+
+    # Q13
+    if(questionAnswers['Q13'] != '无要求'):
+      preDict['caseSize'] = questionAnswers['Q13']
+      preDict['MBSize'] = questionAnswers['Q13']
+      if(preDict['caseSize'] == 'MINI-ITX'):
+        preDict['powerSupplySize'] = 'SFX'
+      else:
+        preDict['powerSupplySize'] = 'ATX'
+
+    # Q14
+    preDict['caseTransparent'] = questionAnswers['Q14']
+
+    # Q15
+    preDict['CPURadiatorType'] = questionAnswers['Q15']
+
+    # Q16
+    preDict['CPURadiatorRGB'] = questionAnswers['Q16']
+
+    # Q17
+    preDict['memoryVest'] = questionAnswers['Q17']
+
+    # Q18
+    preDict['GPURGB'] = questionAnswers['Q18']
+
+    # Q19
+    if(questionAnswers['Q19'] != None):
+      preDict['hardDiskCapacity'] = questionAnswers['Q19']
+    else:
+      preDict['hardDiskCapacity'] = 0.125
+
+    # Q20
+    preDict['powerSupplyModule'] = questionAnswers['Q20']
+
+    # Q21
+    preDict['memoryCapacity'] = questionAnswers['Q21']
+
+  return preDict
+
+
+def suggest(listX, preDict):
+  # 连接数据库
+  db = pymysql.connect("localhost", "root", "08239015", "computer_accessories")
+  # 使用cursor()方法创建一个游标对象
+  cursor = db.cursor()
+
+  # 推荐CPU
+  cursor.execute("SELECT * FROM cpu")
+  data = cursor.fetchall()
+  itemList = []
+  for item in data:
+    #print(item[7], preDict['CPUBrand'])
+    #print(abs(item[5] - listX.CPU.budget))
+    # print('\n--------------------------\n')
+    if((item[7] == preDict['CPUBrand'] or preDict['CPUBrand'] == None) and abs(item[5] - listX.CPU.budget) <= 100):
+      itemList.append(item)
+  #print(itemList == [])
+  if(itemList == []):
+    minD = 9999999
+    for item in data:
+      if((item[7] == preDict['CPUBrand'] or preDict['CPUBrand'] == None) and abs(item[5] - listX.CPU.budget) <= minD):
+        #print(item[1], item[5], minD, abs(item[5] - listX.GPU.budget), minD > abs(item[5] - listX.GPU.budget))
+        if(minD > abs(item[5] - listX.CPU.budget)):
+          itemList = []
+        minD = abs(item[5] - listX.CPU.budget)
+        itemList.append(item)
+  # print(listX.CPU.budget)
+  # for i in itemList:
+    #print(i[1], i[5])
+  itemList.sort(key=lambda x: (x[15], x[3]*50 + x[2]), reverse=True)
+  # print('------------------------------')
+  # for i in itemList:
+  #print(i[1], i[5])
+  # print('\n---------------------------------\n')
+  listX.CPU.name = itemList[0][1]
+  listX.CPU.price = itemList[0][5]
+  listX.CPU.link = itemList[0][6]
+  listX.CPU.socket = itemList[0][12]
+  listX.price += listX.CPU.price
+
+  # 推荐主板
+  cursor.execute("SELECT * FROM motherboard")
+  data = cursor.fetchall()
+  itemList = []
+  for item in data:
+    if((item[7] in preDict['MBBrand'] or preDict['MBBrand'] == []) and (item[9] == preDict['MBSize'] or preDict['MBSize'] == None) and item[11] == listX.CPU.socket and abs(item[5] - listX.motherboard.budget) <= 100):
+      itemList.append(item)
+    #print(preDict['MBSize'], item[9])
+    #print(listX.CPU.socket, item[11])
+    #print(abs(item[5] - listX.motherboard.budget))
+    # print('\n-------------------------------\n')
+  if(itemList == []):
+    minD = 9999999
+    for item in data:
+      if((item[7] in preDict['MBBrand'] or preDict['MBBrand'] == []) and (item[9] == preDict['MBSize'] or preDict['MBSize'] == None) and item[11] == listX.CPU.socket and abs(item[5] - listX.motherboard.budget) <= minD):
+        if(minD > abs(item[5] - listX.motherboard.budget)):
+          itemList = []
+        minD = abs(item[5] - listX.motherboard.budget)
+        itemList.append(item)
+      #print(preDict['MBSize'], item[9])
+      #print(listX.CPU.socket, item[11])
+      #print(abs(item[5] - listX.motherboard.budget))
+      #print((item[9] == preDict['MBSize'] or preDict['MBSize'] == None) and item[11] == listX.CPU.socket and abs(item[5] - listX.motherboard.budget) < minD)
+      # print('\n-------------------------------\n')
+  itemList.sort(key=lambda x: x[3]*50 + x[2], reverse=True)
+  #print(preDict['MBSize'], item[9])
+  listX.motherboard.name = itemList[0][1]
+  listX.motherboard.price = itemList[0][5]
+  listX.motherboard.link = itemList[0][6]
+  listX.motherboard.socket = itemList[0][11]
+  listX.motherboard.m2Num = itemList[0][12]
+  listX.price += listX.motherboard.price
+
+  # 推荐内存
+  cursor.execute("SELECT * FROM memory")
+  data = cursor.fetchall()
+  itemList = []
+  for item in data:
+    if((item[11] == preDict['memoryVest'] or preDict['memoryVest'] == None) and (item[9] == preDict['memoryCapacity'] or preDict['memoryCapacity'] == None) and (item[7] in preDict['memoryBrand'] or preDict['memoryBrand'] == []) and item[12] == 'DDR4' and abs(item[5] - listX.memory.budget) <= 50):
+      itemList.append(item)
+  if(itemList == []):
+    minD = 9999999
+    for item in data:
+      # if(item[7] in preDict['memoryBrand']):
+        #print(item[11] == preDict['memoryVest'])
+        #print(type(item[9]), type(preDict['memoryCapacity']))
+        #print(item[7] in preDict['memoryBrand'])
+        #print(item[12] == 'DDR4')
+        #print(abs(item[5] - listX.memory.budget))
+        # print('\n---------------------------\n')
+      if((item[11] == preDict['memoryVest'] or preDict['memoryVest'] == None) and (item[9] == preDict['memoryCapacity'] or preDict['memoryCapacity'] == None) and (item[7] in preDict['memoryBrand'] or preDict['memoryBrand'] == []) and item[12] == 'DDR4' and abs(item[5] - listX.memory.budget) <= minD):
+        # print(1111)
+        if(minD > abs(item[5] - listX.memory.budget)):
+          itemList = []
+        minD = abs(item[5] - listX.memory.budget)
+        itemList.append(item)
+  itemList.sort(key=lambda x: x[3]*50 + x[2], reverse=True)
+  listX.memory.name = itemList[0][1]
+  listX.memory.price = itemList[0][5]
+  listX.memory.link = itemList[0][6]
+  listX.price += listX.memory.price
+
+  # 推荐GPU
+  cursor.execute("SELECT * FROM graphics_card")
+  data = cursor.fetchall()
+  itemList = []
+  for item in data:
+    if((item[10] == preDict['GPURGB'] or preDict['GPURGB'] == None) and (item[7] in preDict['GPUBrand'] or preDict['GPUBrand'] == []) and (item[11] == preDict['GPUAN'] or preDict['GPUAN'] == None) and abs(item[5] - listX.GPU.budget) <= 100):
+      itemList.append(item)
+  if(itemList == []):
+    minD = 9999999
+    for item in data:
+      if((item[10] == preDict['GPURGB'] or preDict['GPURGB'] == None) and (item[7] in preDict['GPUBrand'] or preDict['GPUBrand'] == []) and (item[11] == preDict['GPUAN'] or preDict['GPUAN'] == None) and abs(item[5] - listX.GPU.budget) <= minD):
+        if(minD > abs(item[5] - listX.GPU.budget)):
+          itemList = []
+        minD = abs(item[5] - listX.GPU.budget)
+        itemList.append(item)
+  itemList.sort(key=lambda x: (x[12], x[3]*50 + x[2]), reverse=True)
+  listX.GPU.name = itemList[0][1]
+  listX.GPU.price = itemList[0][5]
+  listX.GPU.link = itemList[0][6]
+  listX.GPU.length = itemList[0][9]
+  listX.price += listX.GPU.price
+
+  # 推荐散热器
+  cursor.execute("SELECT * FROM cpu_radiator")
+  data = cursor.fetchall()
+  itemList = []
+  typeDict = {0: '风冷', 120: '水冷', 240: '水冷', 280: '水冷', 360: '水冷'}
+  for item in data:
+    socket = item[9].split('~')
+    if((item[11] == preDict['CPURadiatorRGB'] or preDict['CPURadiatorRGB'] == None) and (item[7] in preDict['CPURadiatorBrand'] or preDict['CPURadiatorBrand'] == []) and (typeDict[item[10]] == preDict['CPURadiatorType'] or preDict['CPURadiatorType'] == None) and listX.CPU.socket in socket and abs(item[5] - listX.CPURadiator.budget) <= 50):
+      itemList.append(item)
+    '''
+        if(item[7] in preDict['CPURadiatorBrand']):
+            print(preDict['CPURadiatorRGB'], item[11])
+            print(preDict['CPURadiatorRGB'] == item[11])
+            print(listX.CPU.socket, socket)
+            print(listX.CPU.socket in socket)
+            print(item[7], preDict['CPURadiatorBrand'])
+            print(item[7] in preDict['CPURadiatorBrand'])
+            print(typeDict[item[10]], preDict['CPURadiatorType'])
+            print(typeDict[item[10]] == preDict['CPURadiatorType'])
+            print(abs(item[5] - listX.CPURadiator.budget))
+            print('\n-------------------------------\n')  
+        '''
+  if(itemList == []):
+    minD = 9999999
+    for item in data:
+      socket = item[9].split('~')
+      if((item[11] == preDict['CPURadiatorRGB'] or preDict['CPURadiatorRGB'] == None) and (item[7] in preDict['CPURadiatorBrand'] or preDict['CPURadiatorBrand'] == []) and (typeDict[item[10]] == preDict['CPURadiatorType'] or preDict['CPURadiatorType'] == None) and listX.CPU.socket in socket and abs(item[5] - listX.CPURadiator.budget) <= minD):
+        if(minD > abs(item[5] - listX.CPURadiator.budget)):
+          itemList = []
+        minD = abs(item[5] - listX.CPURadiator.budget)
+        itemList.append(item)
+  itemList.sort(key=lambda x: x[3]*50 + x[2], reverse=True)
+  listX.CPURadiator.name = itemList[0][1]
+  listX.CPURadiator.price = itemList[0][5]
+  listX.CPURadiator.link = itemList[0][6]
+  listX.CPURadiator.socket = listX.CPU.socket
+  listX.CPURadiator.height = itemList[0][8]
+  listX.CPURadiator.size = itemList[0][10]
+  listX.price += listX.CPURadiator.price
+
+  # 推荐硬盘
+  cursor.execute("SELECT * FROM ssd")
+  data1 = cursor.fetchall()
+  cursor.execute("SELECT * FROM hdd")
+  data2 = cursor.fetchall()
+  itemList = []
+  if(listX.HDD.budget == 0):
+    for item in data1:
+      #print(item[8], listX.motherboard.m2Num)
+      #print(item[3], preDict['SSDBrand'])
+      #print(item[9], preDict['hardDiskCapacity'])
+      #print(abs(item[5] - listX.SSD.budget))
+      # print('\n---------------------------\n')
+      if(item[8] == 'M.2' and listX.motherboard.m2Num == 0):
+        continue
+      if((item[7] in preDict['SSDBrand'] or preDict['SSDBrand'] == []) and item[9] == preDict['hardDiskCapacity'] and abs(item[5] - listX.SSD.budget) <= 100):
+        itemList.append(item)
+    if(itemList == []):
+      minD = 9999999
+      for item in data1:
+        if(item[8] == 'M.2' and listX.motherboard.m2Num == 0):
+          continue
+        if((item[7] in preDict['SSDBrand'] or preDict['SSDBrand'] == []) and item[9] == preDict['hardDiskCapacity'] and abs(item[5] - listX.SSD.budget) <= minD):
+          if(minD > abs(item[5] - listX.SSD.budget)):
+            itemList = []
+          minD = abs(item[5] - listX.SSD.budget)
+          itemList.append(item)
+    #print(listX.motherboard.name, listX.motherboard.m2Num)
+    itemList.sort(key=lambda x: x[3]*50 + x[2], reverse=True)
+    listX.SSD.name = itemList[0][1]
+    listX.SSD.price = itemList[0][5]
+    listX.SSD.link = itemList[0][6]
+    listX.price += listX.SSD.price
+  else:
+    for ssd in data1:
+      for hdd in data2:
+        if(ssd[8] == 'M.2' and listX.motherboard.m2Num == 0):
+          continue
+        if((ssd[9] + hdd[10]) == preDict['hardDiskCapacity'] and (ssd[7] in preDict['SSDBrand'] or preDict['SSDBrand'] == []) and (hdd[7] in preDict['HDDBrand'] or preDict['HDDBrand'] == []) and abs((ssd[5]+hdd[5]) - (listX.SSD.budget+listX.HDD.budget)) <= 100):
+          itemList.append((ssd, hdd))
+    if(itemList == []):
+      minD = 9999999
+      for ssd in data1:
+        for hdd in data2:
+          if((ssd[9] + hdd[10]) == preDict['hardDiskCapacity'] and (ssd[7] in preDict['SSDBrand'] or preDict['SSDBrand'] == []) and (hdd[7] in preDict['HDDBrand'] or preDict['HDDBrand'] == []) and abs((ssd[5]+hdd[5]) - (listX.SSD.budget+listX.HDD.budget)) <= minD):
+            if(minD > abs((ssd[5]+hdd[5]) - (listX.SSD.budget+listX.HDD.budget))):
+              itemList = []
+            minD = abs((ssd[5]+hdd[5]) - (listX.SSD.budget+listX.HDD.budget))
+            itemList.append((ssd, hdd))
+    itemList.sort(key=lambda x: (x[0][3]+x[1][3]) /
+                  2 * 50 + x[0][2] + x[1][2], reverse=True)
+    listX.SSD.name = itemList[0][0][1]
+    listX.SSD.price = itemList[0][0][5]
+    listX.SSD.link = itemList[0][0][6]
+    listX.price += listX.SSD.price
+    listX.HDD.name = itemList[0][1][1]
+    listX.HDD.price = itemList[0][1][5]
+    listX.HDD.link = itemList[0][1][6]
+    listX.price += listX.HDD.price
+
+  # 推荐电源
+  cursor.execute("SELECT * FROM power_supply")
+  data = cursor.fetchall()
+  itemList = []
+  for item in data:
+    #print(item[11], preDict['powerSupplyModule'])
+    #print(item[10], preDict['powerSupplySize'])
+    #print(item[7], preDict['powerSupplyBrand'])
+    if((item[11] == preDict['powerSupplyModule'] or preDict['powerSupplyModule'] == None) and (item[10] == preDict['powerSupplySize'] or preDict['powerSupplySize'] == None) and (item[7] in preDict['powerSupplyBrand'] or preDict['powerSupplyBrand'] == []) and abs(item[5] - listX.powerSupply.budget) <= 50):
+      itemList.append(item)
+  if(itemList == []):
+    minD = 9999999
+    for item in data:
+      if((item[12] == preDict['powerSupplyModule'] or preDict['powerSupplyModule'] == None) and (item[10] == preDict['powerSupplySize'] or preDict['powerSupplySize'] == None) and (item[7] in preDict['powerSupplyBrand'] or preDict['powerSupplyBrand'] == []) and abs(item[5] - listX.powerSupply.budget) <= minD):
+        if(minD > abs(item[5] - listX.powerSupply.budget)):
+          itemList = []
+        minD = abs(item[5] - listX.powerSupply.budget)
+        itemList.append(item)
+  itemList.sort(key=lambda x: x[3]*50 + x[2], reverse=True)
+  listX.powerSupply.name = itemList[0][1]
+  listX.powerSupply.price = itemList[0][5]
+  listX.powerSupply.link = itemList[0][6]
+  listX.powerSupply.size = itemList[0][11]
+  listX.price += listX.powerSupply.price
+
+  # 推荐机箱
+  cursor.execute("SELECT * FROM computer_case")
+  data = cursor.fetchall()
+  itemList = []
+  # print(listX.case.budget)
+  for item in data:
+    radiatorSize = item[11].split('~')
+    for size in radiatorSize:
+      if((item[8] == preDict['caseSize'] or preDict['caseSize'] == None) and (item[7] in preDict['caseBrand'] or preDict['caseBrand'] == []) and (item[12] == preDict['caseTransparent'] or preDict['caseTransparent'] == None) and item[9] >= listX.GPU.length and item[10] >= listX.CPURadiator.height and int(size) >= listX.CPURadiator.size and abs(item[5] - listX.case.budget) <= 100):
+        itemList.append(item)
+  if(itemList == []):
+    # print(listX.CPU.name)
+    # print(listX.motherboard.name)
+    # print(listX.GPU.name)
+    # print(listX.CPURadiator.name)
+    minD = 9999999
+    for item in data:
+      radiatorSize = item[11].split('~')
+      for size in radiatorSize:
+        if((item[8] == preDict['caseSize'] or preDict['caseSize'] == None) and (item[7] in preDict['caseBrand'] or preDict['caseBrand'] == []) and (item[12] == preDict['caseTransparent'] or preDict['caseTransparent'] == None) and item[9] >= listX.GPU.length and item[10] >= listX.CPURadiator.height and int(size) >= listX.CPURadiator.size and abs(item[5] - listX.case.budget) <= minD):
+          if(minD > abs(item[5] - listX.case.budget)):
+            itemList = []
+          minD = abs(item[5] - listX.case.budget)
+          itemList.append(item)
+      #print(preDict['caseSize'], item[8])
+      #print(listX.GPU.length, item[9])
+      #print(listX.CPURadiator.height, item[10])
+      #print(listX.CPURadiator.size, size)
+      #print(abs(item[5] - listX.case.budget))
+      # print('\n-------------------------------\n')
+  itemList.sort(key=lambda x: x[3]*50 + x[2], reverse=True)
+  listX.case.name = itemList[0][1]
+  listX.case.price = itemList[0][5]
+  listX.case.link = itemList[0][6]
+  listX.price += listX.case.price
+
+  return listX
+
+
+primaryQuestionDict = {'Q2': ['', '学习、商务办公、轻度娱乐', '3A大作', '网游', '设计'], 'Q3': ['', '无光', 'RGB', 'ARGB'],
+                       'Q4': ['', 'E-ATX', 'ATX', 'M-ATX', 'MINI-ITX', '无要求']}
+advancedQuestionDict = {'Q2': ['', 'CPU', '显卡', '硬盘', '内存', '主板', '电源', 'CPU散热器', '无特殊要求'], 'Q3': ['', 'INTEL', 'AMD'], 'Q5': ['', 'NVIDIA', 'AMD'],
+                        'Q13': ['', 'E-ATX', 'ATX', 'M-ATX', 'MINI-ITX'], 'Q14': ['', 1, 0], 'Q15': ['', '风冷', '水冷'],
+                        'Q16': ['', '无', 'RGB', 'ARGB'], 'Q17': ['', '普条', '马甲条', 'RGB灯条'], 'Q18': ['', '无', '支持RGB'],
+                        'Q20': ['', '全模组化', '半模组化', '非模组化'], 'Q21': ['', 4, 8, 16, 32, 64, 128]}
+
+questionAnswersFile = open('questionAnswers.json', 'r', encoding='UTF-8')
+questionAnswersData = json.load(questionAnswersFile)
+questionAnswersFile.close()
+# print(questionAnswers)
+# 解析问卷数据
+questionAnswers = parse(questionAnswersData)
+if(questionAnswers == None):
+  exit(0)
+# 检查问卷是否存在问题
+check(questionAnswers)
+
+# 建立各配置单对象
+listLow = AccessoriesList('listLow')
+listMiddle = AccessoriesList('listMiddle')
+listHigh = AccessoriesList('listHigh')
+# 初始化各配件预算百分比
+CPUPercent = 0.222
+GPUPercent = 0.295
+motherboardPercent = 0.129
+memoryPercent = 0.090
+SSDPercent = 0.076
+casePercent = 0.038
+powerSupplyPercent = 0.057
+HDDPercent = 0.058
+CPURadiatorPercent = 0.035
+# 初始化各Flag
+preDict = {'caseSize': None, 'hardDiskCapacity': 0.125, 'CPUBrand': None, 'MBBrand': [], 'GPUAN': None, 'MBSize': None,
+           'GPUBrand': [], 'memoryBrand': [], 'SSDBrand': [], 'HDDBrand': [], 'caseBrand': [], 'CPURadiatorBrand': [],
+           'powerSupplyBrand': [], 'caseTransparent': None, 'CPURadiatorType': None, 'CPURadiatorRGB': None, 'memoryVest': None,
+           'GPURGB': None, 'powerSupplyModule': None, 'memoryCapacity': None, 'powerSupplySize': None}
+
+preDict = preferParse(preDict, questionAnswers)
+
+# 根据初学者问卷计算配件预算并进行推荐
+if(questionAnswers['version'] == 'primary'):
+  # 根据Q1初始化各配置单预算
+  budgetLimit = int(questionAnswers['Q1'][0])
+  budgetCap = int(questionAnswers['Q1'][1])
+  listLow.budget = budgetLimit
+  listMiddle.budget = (budgetLimit + budgetCap) / 2
+  listHigh.budget = budgetCap
+
+  # 根据Q2分配各配件预算
+  if(questionAnswers['Q2'] == '学习、商务办公、轻度娱乐'):
+    CPUPercent = 0.237
+    motherboardPercent = 0.139
+    memoryPercent = 0.092
+    SSDPercent = 0.081
+    GPUPercent = 0.259
+    casePercent = 0.037
+    powerSupplyPercent = 0.058
+    CPURadiatorPercent = 0.031
+    HDDPercent = 0.066
+  elif(questionAnswers['Q2'] == '3A大作'):
+    CPUPercent = 0.189
+    motherboardPercent = 0.115
+    memoryPercent = 0.084
+    SSDPercent = 0.081
+    GPUPercent = 0.344
+    casePercent = 0.043
+    powerSupplyPercent = 0.056
+    CPURadiatorPercent = 0.042
+    HDDPercent = 0.046
+  elif(questionAnswers['Q2'] == '网游'):
+    CPUPercent = 0.213
+    motherboardPercent = 0.124
+    memoryPercent = 0.084
+    SSDPercent = 0.078
+    GPUPercent = 0.316
+    casePercent = 0.037
+    powerSupplyPercent = 0.060
+    CPURadiatorPercent = 0.034
+    HDDPercent = 0.054
+  elif(questionAnswers['Q2'] == '设计'):
+    CPUPercent = 0.245
+    motherboardPercent = 0.124
+    memoryPercent = 0.095
+    SSDPercent = 0.069
+    GPUPercent = 0.293
+    casePercent = 0.033
+    powerSupplyPercent = 0.052
+    CPURadiatorPercent = 0.031
+    HDDPercent = 0.058
+
+  # 根据硬盘容量需求决定是否使用机械硬盘
+  if(questionAnswers['Q5'] == None or questionAnswers['Q5'] <= 1):
+    CPUPercent += CPUPercent * HDDPercent
+    motherboardPercent += motherboardPercent * HDDPercent
+    memoryPercent += memoryPercent * HDDPercent
+    SSDPercent += SSDPercent * HDDPercent
+    GPUPercent += GPUPercent * HDDPercent
+    casePercent += casePercent * HDDPercent
+    powerSupplyPercent += powerSupplyPercent * HDDPercent
+    CPURadiatorPercent += CPURadiatorPercent * HDDPercent
+    HDDPercent = 0
+
+elif(questionAnswers['version'] == 'advanced'):
+  # 根据Q1初始化各配置单预算
+  budgetLimit = int(questionAnswers['Q1'][0])
+  budgetCap = int(questionAnswers['Q1'][1])
+  listLow.budget = budgetLimit
+  listMiddle.budget = (budgetLimit + budgetCap) / 2
+  listHigh.budget = budgetCap
+
+  # 根据Q2调整各配件预算比例
+  extraBudget = 0
+  if('CPU' in questionAnswers['Q2']):
+    extraBudget += CPUPercent * 0.2
+    CPUPercent += CPUPercent * 0.2
+  if('显卡' in questionAnswers['Q2']):
+    extraBudget += GPUPercent * 0.2
+    GPUPercent += GPUPercent * 0.2
+  if('硬盘' in questionAnswers['Q2']):
+    extraBudget += SSDPercent * 0.2
+    extraBudget += HDDPercent * 0.2
+    SSDPercent += SSDPercent * 0.2
+    HDDPercent += HDDPercent * 0.2
+  if('内存' in questionAnswers['Q2']):
+    extraBudget += memoryPercent * 0.2
+    memoryPercent += memoryPercent * 0.2
+  if('主板' in questionAnswers['Q2']):
+    extraBudget += motherboardPercent * 0.2
+    motherboardPercent += motherboardPercent * 0.2
+  if('电源' in questionAnswers['Q2']):
+    extraBudget += powerSupplyPercent * 0.2
+    powerSupplyPercent += powerSupplyPercent * 0.2
+  if('CPU散热器' in questionAnswers['Q2']):
+    extraBudget += CPURadiatorPercent * 0.2
+    CPURadiatorPercent += CPURadiatorPercent * 0.2
+
+  CPUPercent -= 0.222 * extraBudget
+  GPUPercent -= 0.295 * extraBudget
+  motherboardPercent -= 0.129 * extraBudget
+  memoryPercent -= 0.090 * extraBudget
+  SSDPercent -= 0.076 * extraBudget
+  casePercent -= 0.038 * extraBudget
+  powerSupplyPercent -= 0.057 * extraBudget
+  HDDPercent -= 0.058 * extraBudget
+  CPURadiatorPercent -= 0.035 * extraBudget
+
+  # 根据硬盘容量需求决定是否使用机械硬盘
+  if(questionAnswers['Q5'] == None or questionAnswers['Q19'] <= 1):
+    CPUPercent += CPUPercent * HDDPercent
+    motherboardPercent += motherboardPercent * HDDPercent
+    memoryPercent += memoryPercent * HDDPercent
+    SSDPercent += SSDPercent * HDDPercent
+    GPUPercent += GPUPercent * HDDPercent
+    casePercent += casePercent * HDDPercent
+    powerSupplyPercent += powerSupplyPercent * HDDPercent
+    CPURadiatorPercent += CPURadiatorPercent * HDDPercent
+    HDDPercent = 0
+
+listLow = calculateBudget(listLow, CPUPercent, motherboardPercent, memoryPercent, SSDPercent, GPUPercent, casePercent,
+                          powerSupplyPercent, CPURadiatorPercent, HDDPercent)
+listMiddle = calculateBudget(listMiddle, CPUPercent, motherboardPercent, memoryPercent, SSDPercent, GPUPercent, casePercent,
+                             powerSupplyPercent, CPURadiatorPercent, HDDPercent)
+listHigh = calculateBudget(listHigh, CPUPercent, motherboardPercent, memoryPercent, SSDPercent, GPUPercent, casePercent,
+                           powerSupplyPercent, CPURadiatorPercent, HDDPercent)
+
+suggest(listLow, preDict)
+suggest(listMiddle, preDict)
+suggest(listHigh, preDict)
+
+# 返回配置单
+listLowRes = {'CPU': [listLow.CPU.name, listLow.CPU.link, listLow.CPU.price],
+              'motherboard': [listLow.motherboard.name, listLow.motherboard.link, listLow.motherboard.price],
+              'memory': [listLow.memory.name, listLow.memory.link, listLow.memory.price],
+              'SSD': [listLow.SSD.name, listLow.SSD.link, listLow.SSD.price],
+              'GPU': [listLow.GPU.name, listLow.GPU.link, listLow.GPU.price],
+              'case': [listLow.case.name, listLow.case.link, listLow.case.price],
+              'powerSupply': [listLow.powerSupply.name, listLow.powerSupply.link, listLow.powerSupply.price],
+              'CPURadiator': [listLow.CPURadiator.name, listLow.CPURadiator.link, listLow.CPURadiator.price],
+              'HDD': [listLow.HDD.name, listLow.HDD.link, listLow.HDD.price],
+              'totalPrice': listLow.price}
+
+listMiddleRes = {'CPU': [listMiddle.CPU.name, listMiddle.CPU.link, listMiddle.CPU.price],
+                 'motherboard': [listMiddle.motherboard.name, listMiddle.motherboard.link, listMiddle.motherboard.price],
+                 'memory': [listMiddle.memory.name, listMiddle.memory.link, listMiddle.memory.price],
+                 'SSD': [listMiddle.SSD.name, listMiddle.SSD.link, listMiddle.SSD.price],
+                 'GPU': [listMiddle.GPU.name, listMiddle.GPU.link, listMiddle.GPU.price],
+                 'case': [listMiddle.case.name, listMiddle.case.link, listMiddle.case.price],
+                 'powerSupply': [listMiddle.powerSupply.name, listMiddle.powerSupply.link, listMiddle.powerSupply.price],
+                 'CPURadiator': [listMiddle.CPURadiator.name, listMiddle.CPURadiator.link, listMiddle.CPURadiator.price],
+                 'HDD': [listMiddle.HDD.name, listMiddle.HDD.link, listMiddle.HDD.price],
+                 'totalPrice': listMiddle.price}
+
+listHighRes = {'CPU': [listHigh.CPU.name, listHigh.CPU.link, listHigh.CPU.price],
+               'motherboard': [listHigh.motherboard.name, listHigh.motherboard.link, listHigh.motherboard.price],
+               'memory': [listHigh.memory.name, listHigh.memory.link, listHigh.memory.price],
+               'SSD': [listHigh.SSD.name, listHigh.SSD.link, listHigh.SSD.price],
+               'GPU': [listHigh.GPU.name, listHigh.GPU.link, listHigh.GPU.price],
+               'case': [listHigh.case.name, listHigh.case.link, listHigh.case.price],
+               'powerSupply': [listHigh.powerSupply.name, listHigh.powerSupply.link, listHigh.powerSupply.price],
+               'CPURadiator': [listHigh.CPURadiator.name, listHigh.CPURadiator.link, listHigh.CPURadiator.price],
+               'HDD': [listHigh.HDD.name, listHigh.HDD.link, listHigh.HDD.price],
+               'totalPrice': listHigh.price}
+
+resDict = {'type': 0, 'flag': 0, 'result': [
+    listLowRes, listMiddleRes, listHighRes]}
+res = open('result.json', 'w', encoding='utf-8')
+print('First: ')
+print(listLowRes['CPU'])
+print(listLowRes['motherboard'])
+print(listLowRes['memory'])
+print(listLowRes['SSD'])
+print(listLowRes['GPU'])
+print(listLowRes['case'])
+print(listLowRes['powerSupply'])
+print(listLowRes['CPURadiator'])
+print(listLowRes['HDD'])
+print(listLowRes['totalPrice'])
+print()
+print('Second: ')
+print(listMiddleRes['CPU'])
+print(listMiddleRes['motherboard'])
+print(listMiddleRes['memory'])
+print(listMiddleRes['SSD'])
+print(listMiddleRes['GPU'])
+print(listMiddleRes['case'])
+print(listMiddleRes['powerSupply'])
+print(listMiddleRes['CPURadiator'])
+print(listMiddleRes['HDD'])
+print(listMiddleRes['totalPrice'])
+print()
+print('Third: ')
+print(listHighRes['CPU'])
+print(listHighRes['motherboard'])
+print(listHighRes['memory'])
+print(listHighRes['SSD'])
+print(listHighRes['GPU'])
+print(listHighRes['case'])
+print(listHighRes['powerSupply'])
+print(listHighRes['CPURadiator'])
+print(listHighRes['HDD'])
+print(listHighRes['totalPrice'])
+print()
+print(resDict)
+json.dump(resDict, res, ensure_ascii=False)
+res.close()