Java+SVNCloud+Mysql课程设计

1、主要内容

课程设计，主要通过Javas wing创建窗口，jdbc连接云端mysql数据库进行基本操作，支持随机生成数据并用动态展示数据结果。

先来看一下实现效果：

2、所需准备

1. 在SVNCloud上部署MySQL
2. 下载所需Java包并导入到IDEA

请访问: SVNCloud 官网、JfreeChart下载、Mysql jar下载部署
等内容，形成类似以下的目录结构，若是代码建构过程发现错误，请仔细检查环境问题。

3、与sql访问的中间类：SqlMessage

package Course_Design;
import java.sql.*;class DataStruct{   //数据结构体根据数据库内容依次定义String tim;     //时间String tmp;     //温度String hum;     //湿度String lit;     //光强
}
public class SqlMessage {static DataStruct selected;     //选中的数据存储到这里static DataStruct prepared;     //即将改写的数据存到这里//查询语句等结构static Connection connection;static Statement statement;static PreparedStatement st;static ResultSet result;SqlMessage(){selected = new DataStruct();prepared = new DataStruct();}void SqlInit() throws SQLException, ClassNotFoundException{//  1.加载驱动Class.forName("com.mysql.cj.jdbc.Driver");//  2.用户信息和url，请注意加上useSSL = false,否则连接失败String url = "jdbc:mysql://sql.wsfdb.cn:3306/ Database(请改为你的数据库名称) ?useSSL=false";//url： jdbc:mysql:// + 目的地址 + 端口号 + 数据库名称? + 其他,这里请确保你在SVNCloud建立了数据库且可以通过navicat等工具正常连接String username="username";	//用户名String password="******";	//密码//  3.连接成功，数据库对象 Connectionconnection = DriverManager.getConnection(url,username,password);//  4.绑定statement = connection.createStatement();}void SendMessage(String sql)throws SQLException {       //发送sql语句(有结果集版本)result = statement.executeQuery(sql);}void upDate(String sql) throws SQLException {           //发送sql语句(无结果集版本)st = connection.prepareStatement(sql);System.out.println("execute:"+sql);int res = st.executeUpdate();if(res > 0){System.out.println("数据更新成功:"+res);}st.close();}void CloseAll()throws SQLException {		//关闭数据库statement.close();connection.close();}
}

4、窗口界面

package Course_Design;import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.*;
import java.sql.SQLException;
import java.text.DecimalFormat;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.Random;public class MyWindow {static SqlMessage sys = new SqlMessage();static int connect_flag = 0;//是否连接数据库的标识，当连接数据库时，生成数据失效static JTextField Edit_tim; //时间文本区域static JTextField Edit_tmp; //温度文本区域static JTextField Edit_hum; //湿度文本区域static JTextField Edit_lit; //光强文本区域static JButton BTN_add = new JButton("添加数据"); //添加static JButton BTN_del = new JButton("删除数据"); //删除static JButton BTN_mod = new JButton("修改数据"); //修改static JButton BTN_sum = new JButton("生成数据"); //生成static JButton BTN_con = new JButton("连接/断开");//连接与断开SQLstatic JButton BTN_lad = new JButton("刷新");     //刷新数据static JFrame window = new JFrame("传感器信息操作系统");static JTable table;static MyTableModel model;private Box getPanel() { //绘制所有小控件//建议panel内部使用GridLayout布局，Panel之间使用Box布局更加美观Box Vbox1 = Box.createVerticalBox();Box Vbox2 = Box.createVerticalBox();Panel Vbox3 = new Panel(new GridLayout(3,2));Box Vbox4 = Box.createVerticalBox();Box Hbox  = Box.createHorizontalBox();JLabel label1 = new JLabel("时间：");Edit_tim = new JTextField(10);JLabel label2 = new JLabel("温度：");Edit_tmp = new JTextField(10);JLabel label3 = new JLabel("湿度：");Edit_hum = new JTextField(10);JLabel label4 = new JLabel(" 光强：");Edit_lit = new JTextField(10);//label 与 text edit 加入窗体Vbox1.add(label1);Vbox2.add(Edit_tim);Vbox1.add(label2);Vbox2.add(Edit_tmp);Vbox1.add(label3);Vbox2.add(Edit_hum);Vbox1.add(label4);Vbox2.add(Edit_lit);// 按键加入窗体,创建消息映射Vbox3.add(BTN_add); BTN_add.addActionListener(e -> On_BTN_add());Vbox3.add(BTN_del); BTN_del.addActionListener(e -> On_BTN_del());Vbox3.add(BTN_mod); BTN_mod.addActionListener(e -> On_BTN_mod());Vbox3.add(BTN_sum); BTN_sum.addActionListener(e -> On_BTN_sum());Vbox3.add(BTN_con); BTN_con.addActionListener(e -> On_BTN_con());Vbox3.add(BTN_lad); BTN_lad.addActionListener(e -> On_BTN_lad());Hbox.add(Vbox1);Hbox.add(Vbox2);Panel func = new Panel(new GridLayout(1,0));func.add(BTN_Func_Summon);BTN_Func_Summon.addActionListener(e -> On_BTN_Func_Summon());func.add(BTN_Func_Drawer);BTN_Func_Drawer.addActionListener(e -> On_BTN_Func_Drawer());Vbox4.add(func);Vbox4.add(Box.createVerticalStrut(70));Vbox4.add(Hbox);Vbox4.add(Box.createVerticalStrut(40));Vbox4.add(Vbox3);return Vbox4;}public void InitWindow(){   //初始化table主窗体window.setSize(600,400);window.setResizable(false);window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 初始化表格形式，选择信号为行选Object[][] tableData = new Object[0][4];    //表格内容String[] names = {"时间","温度","湿度","光强"};  //设置表头model = new MyTableModel(tableData,names);table = new JTable(model);table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//设置table点击事件，点击即选中单行table.addMouseListener(new MouseListener() {@Override public void mouseClicked(MouseEvent e) {On_Table_clicked();}@Override public void mousePressed(MouseEvent e) {}@Override public void mouseReleased(MouseEvent e) {}@Override public void mouseEntered(MouseEvent e) {}@Override public void mouseExited(MouseEvent e) {}});//将table放入JScrollPane以便于滚动表格JScrollPane scrollPane = new JScrollPane(table);//开始布局控件JPanel panel1 = new JPanel();panel1.add(scrollPane);JPanel panel2 = new JPanel();panel2.add(getPanel());JPanel total = new JPanel();total.add(panel1);total.add(panel2);//加入控件window.add(total);window.pack();window.setVisible(true);}void On_BTN_add(){if (connect_flag == 0){Update_Field();model.addRow(GetObject());}else{String sql = "Insert Into visual_sensor values('"+SqlMessage.prepared.tim+"',"+SqlMessage.prepared.tmp+","+SqlMessage.prepared.hum+","+SqlMessage.prepared.lit+");";try {sys.upDate(sql);Update_Field();model.addRow(GetObject());} catch (SQLException e) {throw new RuntimeException(e);}}}void On_BTN_del(){if(connect_flag == 0){int flag = table.getSelectedRow();if(flag == -1) {JOptionPane.showMessageDialog(null, "未选择删除元素", "错误",JOptionPane.ERROR_MESSAGE);}else{model.removeRow(table.getSelectedRow());}}else{String sql = "Delete from visual_sensor Where time='"+ SqlMessage.selected.tim + "' and temperature = "+ SqlMessage.selected.tmp + " and humidity = "+ SqlMessage.selected.hum + " and light = "+ SqlMessage.selected.lit + ";";try {sys.upDate(sql);model.removeRow(table.getSelectedRow());} catch (SQLException e) {throw new RuntimeException(e);}}}void On_BTN_mod(){if (connect_flag == 0){On_BTN_del();On_BTN_add();}else{String sql = "Update visual_sensor set time = '"+SqlMessage.prepared.tim+ "', temperature = "+SqlMessage.prepared.tmp+ ", humidity = "+SqlMessage.prepared.hum+ ",light = "+SqlMessage.prepared.lit+ " where time = '"+SqlMessage.selected.tim+ "' AND temperature = "+SqlMessage.selected.tmp+ " AND humidity = "+SqlMessage.selected.hum+ " AND light = "+SqlMessage.selected.lit+ ";";try {sys.upDate(sql);//避免重复执行sql节约资源connect_flag = 0;On_BTN_del();On_BTN_add();connect_flag = 1;} catch (SQLException e) {throw new RuntimeException(e);}}}void On_BTN_sum(){//生成数据并填入缓冲区//数据均采用两位小数//格式化时间 时：分：秒LocalTime time = LocalTime.now();DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");String tm = time.format(formatter);SqlMessage.prepared.tim = tm;//格式化湿度 0-1double rand1=Math.random();String hum="0";hum += new DecimalFormat(".00").format(rand1);SqlMessage.prepared.hum = hum;//格式化光强 0-600double rand21=Math.random();Random random = new Random();int rand22 = random.nextInt(600);String light = rand22 + new DecimalFormat(".00").format(rand21);SqlMessage.prepared.lit = light;//格式化温度 18-34double rand31=Math.random();int rand32 = random.nextInt(16)+18;String tmp = rand32 + new DecimalFormat(".00").format(rand31);SqlMessage.prepared.tmp = tmp;//打印提示信息System.out.println("Summon column as\t"+tm+"\t"+tmp+"\t"+hum+"\t"+light);ShowInfo();}void On_BTN_con(){//切换sql连接状态，默认关闭,点击开启后直接读取DB table信息并加载if(connect_flag == 0){try {sys.SqlInit();System.out.println("Connect sql successfully!");connect_flag =1;} catch (SQLException | ClassNotFoundException e) {System.out.println("Connect sql failed!");throw new RuntimeException(e);}}else{try {sys.CloseAll();System.out.println("Close sql successfully!");connect_flag = 0;} catch (SQLException e) {System.out.println("Close sql failed!");throw new RuntimeException(e);}}}void On_BTN_lad(){if(connect_flag == 1){String sql = "select * from visual_sensor;";try {sys.SendMessage(sql);model.setRowCount(0);while(SqlMessage.result.next()){//改为在窗口上显示Object[] ob = new Object[4];ob[0] = SqlMessage.result.getString("time");ob[1] = SqlMessage.result.getString("temperature");ob[2] = SqlMessage.result.getString("humidity");ob[3] = SqlMessage.result.getString("light");model.addRow(ob);}SqlMessage.result.close();}catch (SQLException e) {System.out.println("加载数据异常");throw new RuntimeException(e);}}else{JOptionPane.showMessageDialog(null, "请连接数据库后刷新", "错误",JOptionPane.ERROR_MESSAGE);}}void On_Table_clicked(){int flag = table.getSelectedRow();if (flag!= -1){SqlMessage.prepared.tim = table.getValueAt(flag,0).toString();SqlMessage.prepared.tmp = table.getValueAt(flag,1).toString();SqlMessage.prepared.hum = table.getValueAt(flag,2).toString();SqlMessage.prepared.lit = table.getValueAt(flag,3).toString();SqlMessage.selected.tim = SqlMessage.prepared.tim;SqlMessage.selected.tmp = SqlMessage.prepared.tmp;SqlMessage.selected.hum = SqlMessage.prepared.hum;SqlMessage.selected.lit = SqlMessage.prepared.lit;ShowInfo();}}void ShowInfo(){Edit_lit.setText(SqlMessage.prepared.lit);Edit_tmp.setText(SqlMessage.prepared.tmp);Edit_hum.setText(SqlMessage.prepared.hum);Edit_tim.setText(SqlMessage.prepared.tim);}Object[] GetObject(){Object[] ob = new Object[4];ob[0] = SqlMessage.prepared.tim;ob[1] = SqlMessage.prepared.tmp;ob[2] = SqlMessage.prepared.hum;ob[3] = SqlMessage.prepared.lit;return ob;}void Update_Field(){SqlMessage.prepared.tim = Edit_tim.getText();SqlMessage.prepared.tmp = Edit_tmp.getText();SqlMessage.prepared.hum = Edit_hum.getText();SqlMessage.prepared.lit = Edit_lit.getText();}//***********************************************生成与绘制功能模块主要内容**********************************************Timer timer = new Timer(1000, e -> {//1秒生成一个数据,通过模拟按键实现On_BTN_sum();Insert_DataSet();On_BTN_add();});static JButton BTN_Func_Summon = new JButton("生成器");static JButton BTN_Func_Drawer = new JButton("制表器");void On_BTN_Func_Summon(){if(!timer.isRunning()){timer.start();System.out.println("Timer running ... ...");}else{timer.stop();System.out.println("Timer stopped ... ...");}}DefaultCategoryDataset dataset = new DefaultCategoryDataset();void On_BTN_Func_Drawer(){JFreeChart chart = ChartFactory.createLineChart("DataSet","Collected Time","Values(%)",dataset,PlotOrientation.VERTICAL,true,false,false);ChartFrame chartFrame = new ChartFrame("Course Design",chart);chartFrame.pack();chartFrame.setVisible(true);}void Insert_DataSet(){dataset.addValue((Double.parseDouble(SqlMessage.prepared.tmp)-18)/0.16,"temperature",SqlMessage.prepared.tim);dataset.addValue(Double.parseDouble(SqlMessage.prepared.hum)*100,"humidity",SqlMessage.prepared.tim);dataset.addValue(Double.parseDouble(SqlMessage.prepared.lit)/6,"light",SqlMessage.prepared.tim);}
}class MyTableModel extends DefaultTableModel{//自己构建表格模型，删除表格内编辑属性@Overridepublic boolean isCellEditable(int row, int column) {return false;}public MyTableModel(Object[][] data, Object[] columnNames) {setDataVector(data, columnNames);}
}

5、main方法

package Course_Design;
import java.sql.*;public class Conn {public static void main(String[] args) throws SQLException, ClassNotFoundException {MyWindow window = new MyWindow();window.InitWindow();}
}
//请注意将上面三个类放在一个软件包里，并用packge 包名;

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