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PyQt5-TableWidget 表格视图

基于PyQt5 postgreSQL实现简单的数据插入、数据表格查询。

运行前需要安装psycopg2 模块，配置好postgerSQL。

先看效果图：

第1列为日期时间、第2列为自增1的编号、第3到第5列为设定的字符串。数据查询时，根据创建表的设定框名字查询该表的数据。

主程序代码

  1 # -*- coding: utf-8 -*-
  2 import sys
  3 import psycopg2
  4 import time,datetime
  5 from PyQt5.QtWidgets import QApplication, QMainWindow,QWidget,QMessageBox,QTableWidgetItem
  6 from TableView_test import Ui_dataBaseForm 
  7 
  8 
  9 class MyMain(QMainWindow,Ui_dataBaseForm): 
 10     conn = psycopg2.connect(database="postgres", user="postgres", password="0818", host="localhost", port="5432")
 11     cursor = conn.cursor()
 12 
 13     def __init__(self):
 14         super().__init__()
 15         self.setupUi(self)  ## 初始化运行A窗口类下的 setupUi  函数
 16         self.db_create.clicked.connect(self.createBase) #创建数据库表
 17         self.db_delete.clicked.connect(self.deleteBase) #删除表格
 18         self.db_insert.clicked.connect(self.dbWrit)     #插入数据
 19         self.db_delete_row.clicked.connect(self.deleteRow) #删除行
 20         self.date_select.clicked.connect(self.dateSelect)  #查询输出
 21         self.db_export.clicked.connect(self.excelExport)   #导出CSV
 22 
 23 
 24 
 25     #报警提示框
 26     def alarmMessageBox(self,alarm):
 27         self.alarm = alarm
 28         reply = QMessageBox.information(self, "提示框", self.alarm, QMessageBox.Yes ,
 29                                         QMessageBox.Yes)
 30 
 31     #创建表格
 32     def createBase(self):
 33         try:
 34             self.dbName = self.db_create_edit.text()#设置表名
 35             MyMain.cursor.execute("CREATE TABLE %s (    
 36             date  timestamp without time zone NOT NULL, 
 37             id  serial  NOT NULL,  
 38             line1 CHAR(6) NOT NULL,
 39             line2 CHAR(6) NOT NULL,
 40             line3 CHAR(6) NOT NULL,
 41             PRIMARY KEY (date));"   % (self.dbName)) ## 创建表SQL命令
 42             MyMain.conn.commit()
 43             self.alarmMessageBox("创建表格成功！")
 44         except Exception as exc:
 45             self.alarmMessageBox(str(exc))  ##触发报警框
 46             MyMain.conn.commit()  ## 给数据库，开启新的事物块。
 47 
 48     #删除表格
 49     def deleteBase(self):
 50         try:
 51             self.dbName = self.db_delete_edit.text()#设置表名
 52             MyMain.cursor.execute("DROP TABLE %s "  % (self.dbName)) ## 创建execu test 数据库SQL命令
 53             MyMain.conn.commit()
 54             self.alarmMessageBox("删除表格完成！")
 55         except Exception as exc:
 56             self.alarmMessageBox(str(exc)) 
 57             MyMain.conn.commit()  
 58 
 59     #写入数据
 60     def dbWrit(self):
 61         self.dbName = self.db_create_edit.text()
 62         self.text = self.db_writ.text().split() #读取界面框数据
 63         # print(self.text)
 64         print(len(self.text))
 65         if len(self.text) != 3:
 66             self.alarmMessageBox("数据为 %d 个，不符合要求。" % (len(self.text)))
 67         else:
 68             try:
 69                 MyMain.cursor.execute( "INSERT INTO {0} (date,line1,line2,line3) VALUES((SELECT now()),'{1}', '{2}' , '{3}')"
 70                                        .format(self.dbName, self.text[0],self.text[1], self.text[2]))
 71                 MyMain.conn.commit()
 72             except Exception as exc:
 73                 self.alarmMessageBox(str(exc))  
 74                 MyMain.conn.commit()  
 75     #删除最后一行
 76     def deleteRow(self):
 77         self.dbName = self.db_create_edit.text()
 78         try:
 79             MyMain.cursor.execute("DELETE FROM {0} WHERE date= (SELECT max(date)  FROM {0})".format(self.dbName))
 80             MyMain.conn.commit()
 81             self.alarmMessageBox("删除最后一行成功！")
 82         except Exception as exc:
 83             self.alarmMessageBox(str(exc)) 
 84             MyMain.conn.commit()
 85     #查询的条件
 86     def rogatoryCondition(self):
 87         self.startTime = self.date_start.dateTime().toString("yyyy-MM-dd hh:mm:ss")
 88         self.endTime = self.date_end.dateTime().toString("yyyy-MM-dd hh:mm:ss")
 89 
 90         self.dbName = self.db_create_edit.text()
 91         self.select = "SELECT date, id ,line1,line2,line3 FROM {0} WHERE date > '{1}' and  date < '{2}'".format(
 92             self.dbName,
 93             self.startTime,
 94             self.endTime)
 95         return self.select
 96 
 97     #查询输出
 98     def dateSelect(self):
 99         self.condition = self.rogatoryCondition()
100         try:
101             MyMain.cursor.execute(self.condition)
102             self.data      = MyMain.cursor.fetchall()
103             self.rowNum    = len(self.data)  #获取查询到的行数
104             self.columnNum = len(self.data[0]) #获取查询到的列数
105 
106             self.dataView.setRowCount(self.rowNum)  #设置表格行数
107             self.dataView.setColumnCount(self.columnNum)
108 
109             for i, da in enumerate( self.data):
110                 for j in range(self.columnNum):
111                     self.itemContent = QTableWidgetItem(( '%s' )  % (da[j]))
112                     self.dataView.setItem(i,j,self.itemContent )
113             self.alarmMessageBox("查询完成！")
114         except Exception as exc:
115             self.alarmMessageBox(str(exc))
116             MyMain.conn.commit()
117 
118     def excelExport(self):
119         self.condition = self.rogatoryCondition()
120         MyMain.cursor.execute("COPY( {0} ) TO 'D:/ExceptionData.csv' with csv header".format(self.condition))
121         self.alarmMessageBox("导出成功！")
122 
123 
124 
125 
126 
127  
128         
129 if __name__ == "__main__":
130     app = QApplication(sys.argv)
131     A1 = MyMain()
132     A1.show()
133     sys.exit(app.exec_())

UI文件代码，TableView_test.py 代码

  1 # -*- coding: utf-8 -*-
  2 
  3 # Form implementation generated from reading ui file 'TableView_test.ui'
  4 #
  5 # Created by: PyQt5 UI code generator 5.11.3
  6 #
  7 # WARNING! All changes made in this file will be lost!
  8 
  9 from PyQt5 import QtCore, QtGui, QtWidgets
 10 
 11 class Ui_dataBaseForm(object):
 12     def setupUi(self, dataBaseForm):
 13         dataBaseForm.setObjectName("dataBaseForm")
 14         dataBaseForm.resize(1127, 754)
 15         font = QtGui.QFont()
 16         font.setBold(False)
 17         font.setWeight(50)
 18         dataBaseForm.setFont(font)
 19         dataBaseForm.setAutoFillBackground(False)
 20         self.groupBox = QtWidgets.QGroupBox(dataBaseForm)
 21         self.groupBox.setGeometry(QtCore.QRect(870, 80, 231, 141))
 22         font = QtGui.QFont()
 23         font.setBold(False)
 24         font.setWeight(50)
 25         self.groupBox.setFont(font)
 26         self.groupBox.setStyleSheet("")
 27         self.groupBox.setObjectName("groupBox")
 28         self.layoutWidget = QtWidgets.QWidget(self.groupBox)
 29         self.layoutWidget.setGeometry(QtCore.QRect(10, 20, 211, 101))
 30         self.layoutWidget.setObjectName("layoutWidget")
 31         self.gridLayout = QtWidgets.QGridLayout(self.layoutWidget)
 32         self.gridLayout.setContentsMargins(0, 0, 0, 0)
 33         self.gridLayout.setObjectName("gridLayout")
 34         self.db_create = QtWidgets.QPushButton(self.layoutWidget)
 35         self.db_create.setObjectName("db_create")
 36         self.gridLayout.addWidget(self.db_create, 0, 1, 1, 1)
 37         self.db_delete_edit = QtWidgets.QLineEdit(self.layoutWidget)
 38         font = QtGui.QFont()
 39         font.setFamily("微软雅黑")
 40         font.setPointSize(12)
 41         font.setBold(False)
 42         font.setItalic(False)
 43         font.setWeight(50)
 44         self.db_delete_edit.setFont(font)
 45         self.db_delete_edit.setLayoutDirection(QtCore.Qt.LeftToRight)
 46         self.db_delete_edit.setStyleSheet("")
 47         self.db_delete_edit.setAlignment(QtCore.Qt.AlignLeading|QtCore.Qt.AlignLeft|QtCore.Qt.AlignVCenter)
 48         self.db_delete_edit.setObjectName("db_delete_edit")
 49         self.gridLayout.addWidget(self.db_delete_edit, 1, 0, 1, 1)
 50         self.db_delete = QtWidgets.QPushButton(self.layoutWidget)
 51         self.db_delete.setObjectName("db_delete")
 52         self.gridLayout.addWidget(self.db_delete, 1, 1, 1, 1)
 53         self.db_create_edit = QtWidgets.QLineEdit(self.layoutWidget)
 54         font = QtGui.QFont()
 55         font.setFamily("微软雅黑")
 56         font.setPointSize(12)
 57         font.setBold(False)
 58         font.setItalic(False)
 59         font.setWeight(50)
 60         self.db_create_edit.setFont(font)
 61         self.db_create_edit.setLayoutDirection(QtCore.Qt.LeftToRight)
 62         self.db_create_edit.setStyleSheet("")
 63         self.db_create_edit.setAlignment(QtCore.Qt.AlignLeading|QtCore.Qt.AlignLeft|QtCore.Qt.AlignVCenter)
 64         self.db_create_edit.setObjectName("db_create_edit")
 65         self.gridLayout.addWidget(self.db_create_edit, 0, 0, 1, 1)
 66         self.groupBox_2 = QtWidgets.QGroupBox(dataBaseForm)
 67         self.groupBox_2.setGeometry(QtCore.QRect(870, 270, 231, 171))
 68         self.groupBox_2.setObjectName("groupBox_2")
 69         self.layoutWidget1 = QtWidgets.QWidget(self.groupBox_2)
 70         self.layoutWidget1.setGeometry(QtCore.QRect(10, 20, 211, 141))
 71         self.layoutWidget1.setObjectName("layoutWidget1")
 72         self.gridLayout_2 = QtWidgets.QGridLayout(self.layoutWidget1)
 73         self.gridLayout_2.setContentsMargins(0, 0, 0, 0)
 74         self.gridLayout_2.setObjectName("gridLayout_2")
 75         self.A_title_3 = QtWidgets.QLabel(self.layoutWidget1)
 76         font = QtGui.QFont()
 77         font.setPointSize(11)
 78         self.A_title_3.setFont(font)
 79         self.A_title_3.setObjectName("A_title_3")
 80         self.gridLayout_2.addWidget(self.A_title_3, 3, 0, 1, 1)
 81         self.date_select = QtWidgets.QPushButton(self.layoutWidget1)
 82         self.date_select.setObjectName("date_select")
 83         self.gridLayout_2.addWidget(self.date_select, 5, 0, 1, 1)
 84         self.A_title_2 = QtWidgets.QLabel(self.layoutWidget1)
 85         font = QtGui.QFont()
 86         font.setPointSize(11)
 87         self.A_title_2.setFont(font)
 88         self.A_title_2.setObjectName("A_title_2")
 89         self.gridLayout_2.addWidget(self.A_title_2, 0, 0, 1, 1)
 90         self.date_start = QtWidgets.QDateTimeEdit(self.layoutWidget1)
 91         font = QtGui.QFont()
 92         font.setPointSize(12)
 93         font.setBold(True)
 94         font.setWeight(75)
 95         self.date_start.setFont(font)
 96         self.date_start.setDateTime(QtCore.QDateTime(QtCore.QDate(2019, 1, 1), QtCore.QTime(3, 2, 3)))
 97         self.date_start.setCalendarPopup(True)
 98         self.date_start.setObjectName("date_start")
 99         self.gridLayout_2.addWidget(self.date_start, 1, 0, 1, 1)
100         self.date_end = QtWidgets.QDateTimeEdit(self.layoutWidget1)
101         font = QtGui.QFont()
102         font.setPointSize(12)
103         font.setBold(True)
104         font.setWeight(75)
105         self.date_end.setFont(font)
106         self.date_end.setDateTime(QtCore.QDateTime(QtCore.QDate(2019, 3, 1), QtCore.QTime(2, 7, 11)))
107         self.date_end.setCalendarPopup(True)
108         self.date_end.setObjectName("date_end")
109         self.gridLayout_2.addWidget(self.date_end, 4, 0, 1, 1)
110         self.groupBox_3 = QtWidgets.QGroupBox(dataBaseForm)
111         self.groupBox_3.setGeometry(QtCore.QRect(870, 450, 231, 171))
112         self.groupBox_3.setObjectName("groupBox_3")
113         self.layoutWidget2 = QtWidgets.QWidget(self.groupBox_3)
114         self.layoutWidget2.setGeometry(QtCore.QRect(10, 20, 211, 111))
115         self.layoutWidget2.setObjectName("layoutWidget2")
116         self.gridLayout_3 = QtWidgets.QGridLayout(self.layoutWidget2)
117         self.gridLayout_3.setContentsMargins(0, 0, 0, 0)
118         self.gridLayout_3.setObjectName("gridLayout_3")
119         self.db_print = QtWidgets.QPushButton(self.layoutWidget2)
120         self.db_print.setObjectName("db_print")
121         self.gridLayout_3.addWidget(self.db_print, 1, 0, 1, 1)
122         self.db_export = QtWidgets.QPushButton(self.layoutWidget2)
123         self.db_export.setObjectName("db_export")
124         self.gridLayout_3.addWidget(self.db_export, 0, 0, 1, 1)
125         self.layoutWidget3 = QtWidgets.QWidget(dataBaseForm)
126         self.layoutWidget3.setGeometry(QtCore.QRect(10, 630, 851, 33))
127         self.layoutWidget3.setObjectName("layoutWidget3")
128         self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.layoutWidget3)
129         self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
130         self.horizontalLayout_2.setObjectName("horizontalLayout_2")
131         self.A_title = QtWidgets.QLabel(self.layoutWidget3)
132         font = QtGui.QFont()
133         font.setPointSize(10)
134         self.A_title.setFont(font)
135         self.A_title.setObjectName("A_title")
136         self.horizontalLayout_2.addWidget(self.A_title)
137         self.db_writ = QtWidgets.QLineEdit(self.layoutWidget3)
138         font = QtGui.QFont()
139         font.setFamily("新宋体")
140         font.setPointSize(10)
141         font.setBold(False)
142         font.setItalic(False)
143         font.setWeight(50)
144         self.db_writ.setFont(font)
145         self.db_writ.setLayoutDirection(QtCore.Qt.LeftToRight)
146         self.db_writ.setStyleSheet("")
147         self.db_writ.setAlignment(QtCore.Qt.AlignLeading|QtCore.Qt.AlignLeft|QtCore.Qt.AlignVCenter)
148         self.db_writ.setObjectName("db_writ")
149         self.horizontalLayout_2.addWidget(self.db_writ)
150         self.db_insert = QtWidgets.QPushButton(self.layoutWidget3)
151         self.db_insert.setObjectName("db_insert")
152         self.horizontalLayout_2.addWidget(self.db_insert)
153         self.db_delete_row = QtWidgets.QPushButton(self.layoutWidget3)
154         self.db_delete_row.setObjectName("db_delete_row")
155         self.horizontalLayout_2.addWidget(self.db_delete_row)
156         self.dataView = QtWidgets.QTableWidget(dataBaseForm)
157         self.dataView.setGeometry(QtCore.QRect(10, 80, 851, 541))
158         self.dataView.setObjectName("dataView")
159         #self.dataView.setColumnCount(0)
160         #self.dataView.setRowCount(0)
161 
162         self.retranslateUi(dataBaseForm)
163         QtCore.QMetaObject.connectSlotsByName(dataBaseForm)
164 
165     def retranslateUi(self, dataBaseForm):
166         _translate = QtCore.QCoreApplication.translate
167         dataBaseForm.setWindowTitle(_translate("dataBaseForm", "TableView数据库视图-liangfu"))
168         self.groupBox.setTitle(_translate("dataBaseForm", "基本操作"))
169         self.db_create.setText(_translate("dataBaseForm", "创建表格"))
170         self.db_delete_edit.setText(_translate("dataBaseForm", "dataBase"))
171         self.db_delete.setText(_translate("dataBaseForm", "删除表格"))
172         self.db_create_edit.setText(_translate("dataBaseForm", "dataBase"))
173         self.groupBox_2.setTitle(_translate("dataBaseForm", "查找数据"))
174         self.A_title_3.setText(_translate("dataBaseForm", "结束时间："))
175         self.date_select.setText(_translate("dataBaseForm", "查询"))
176         self.A_title_2.setText(_translate("dataBaseForm", "开始时间："))
177         self.date_start.setDisplayFormat(_translate("dataBaseForm", "yyyy-MM-dd hh:mm:ss"))
178         self.date_end.setDisplayFormat(_translate("dataBaseForm", "yyyy-MM-dd hh:mm:ss"))
179         self.groupBox_3.setTitle(_translate("dataBaseForm", "导出保存"))
180         self.db_print.setText(_translate("dataBaseForm", "打印"))
181         self.db_export.setText(_translate("dataBaseForm", "导出为Excel文档"))
182         self.A_title.setText(_translate("dataBaseForm", "输入数值（空格隔开）："))
183         self.db_writ.setText(_translate("dataBaseForm", "0.1023 0.1233 0.1214"))
184         self.db_insert.setText(_translate("dataBaseForm", "插入一行"))
185         self.db_delete_row.setText(_translate("dataBaseForm", "删除一行"))

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原文地址：https://www.cnblogs.com/siyun/p/10408393.html