Java集合和IO流实现水果摊项目
作者：汤米先生
最近闲来无事，使用java基础知识集合和IO流做了一个简单的小项目，水果摊项目，用到GUI和Mysql数据库搭建，本文通过实例代码给大家介绍的非常详细，需要的朋友参考下吧
前言
前一段时间利用Java基础知识集合和IO流做了个简单的小项目-水果摊，感觉不过瘾，最近又想着用GUI和Mysql数据库重做一下，名为另一个水果摊，下面就来分享一下代码吧
一、包和表截图
二、源代码
1.JDBC连接Mysql数据
管理员界面：增删查改
package com.vector.service;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import com.vector.dao.Fruit;
import com.vector.units.ConnectMsql;
public class FruitDao {
public static String add(Fruit fruit) {
String s = null;
try {
// Connection connection = ConnectMsql.getConnectMsql();
String sql = "insert into fruit(name,price,number) values(?,?,0)";
Connection connection = ConnectMsql.getConnectMsql();
PreparedStatement ad = connection.prepareStatement(sql);
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("select * from fruit");
int f = 0;
while (rs.next()) {
if (fruit.getName().equals(rs.getString("name"))) {
f = 1;
}
/*
* System.out.println(rs.getInt("id") + " " + rs.getString("name") + " " +
* rs.getDouble("price") + " " + rs.getInt("number"));
*/
}
if (f == 0) {
ad.setString(1, fruit.getName());
ad.setDouble(2, fruit.getPrice());
int i = ad.executeUpdate();
if (i > 0) {
// System.out.println("添加成功!");
s = "添加成功!";
} else {
// System.out.println("水果重复,添加失败!");
s = "水果重复,添加失败!";
}
} else {
s = "水果重复,添加失败!";
}
} catch (SQLException e) {
// TODO Auto-generated catch block
// e.printStackTrace();
}
return s;
}
public static String delete(String name) {
String sql = "delete from fruit where name = ?";
String s1 = null;
Connection connection = ConnectMsql.getConnectMsql();
PreparedStatement dele = null;
try {
dele = connection.prepareStatement(sql);
dele.setString(1, name);
int i = dele.executeUpdate();
if (i > 0) {
s1 = "删除成功！";
} else {
s1 = "删除失败！未找到该水果！";
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return s1;
}
public static String change(String name, double price) {
String sql = "update fruit set price= ? where name= ?";
String s2 = null;
try {
Connection connection = ConnectMsql.getConnectMsql();
PreparedStatement upda = connection.prepareStatement(sql);
upda.setDouble(1, price);
// upda.setInt(2, 2);
upda.setString(2, name);
// System.out.println(name);
int i = upda.executeUpdate();
if (i > 0) {
s2 = " 修改成功！";
} else {
s2 = "修改失败，水果不存在！";
}
} catch (SQLException e) {
e.printStackTrace();
}
return s2;
}
public static ResultSet list() {
ResultSet rs = null;
Connection connection = ConnectMsql.getConnectMsql();
Statement stmt;
try {
stmt = connection.createStatement();
rs = stmt.executeQuery("select * from fruit");
/*
* while (rs.next()) { s="序号："+rs.getInt("id") + " 水果名称：" + rs.getString("name")
* + " 水果价格：" + rs.getDouble("price") + " ";
* System.out.println("序号："+rs.getInt("id") + " 水果名称：" + rs.getString("name") +
* " 水果价格：" + rs.getDouble("price") + " " );
*
* }
*/
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rs;
}
}
用户界面 ：查找水果
package com.vector.service;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.vector.dao.Fruit;
import com.vector.units.ConnectMsql;
public class UFruitDao {
public static List<Fruit> list = new ArrayList<>();
static Fruit f = null;
public static List Uadd(String name, int number) {
ResultSet rs = null;
Connection connection = ConnectMsql.getConnectMsql();
try {
Statement stmt = connection.createStatement();
rs = stmt.executeQuery("select * from fruit");
int k = 0;
while (rs.next()) {
if (rs.getString("name").equals(name)) {
f = new Fruit(rs.getString("name"), rs.getDouble("price"), number);
k = 1;
}
/*
* System.out.println("序号：" + rs.getInt("id") + " 水果名称：" + rs.getString("name")
* + " 水果价格：" + rs.getDouble("price") + " ");
*/
}
if (k == 0) {
System.out.println("水果不纯在，添加失败！");
}
k = 0;
for (Fruit s : list) {
if (s.getName().equals(name)) {
s.setNumber(s.getNumber() + number);
k = 1;
}
}
if (k == 0)
list.add(f);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
}
建立断开连接
package com.vector.units;
import java.sql.*;
public class ConnectMsql {
public static Connection connect;
public static Connection getConnectMsql() {
try {
Class.forName("com.mysql.cj.jdbc.Driver");
// Class.forName("org.gjt.mm.mysql.Driver");
// System.out.println("成功加载Mysql驱动程序!");
} catch (Exception e) {
System.out.print("加载Mysql驱动程序时出错!");
e.printStackTrace();
}
try {
connect = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/fru?&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true",
"root", "zpx");
// System.out.println("成功连接Mysql服务器!");
Statement stmt = connect.createStatement();
} catch (Exception e) {
System.out.print("获取连接错误!");
e.printStackTrace();
}
return connect;
}
public static void closeConnection() {
if (connect != null) {
try {
connect.close();
// sSystem.out.println("数据库连接关闭");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
2.GUI窗口界面
开始选择界面
package com.vector.view;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import com.vector.test.logon;
import com.vector.view.userInterface;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JTextArea;
import java.awt.Color;
import java.awt.CardLayout;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import java.awt.SystemColor;
public class selInterface extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void star() {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
selInterface frame = new selInterface();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public selInterface() {
setIconImage(Toolkit.getDefaultToolkit().getImage("D:\\eclip\\FruitV\\src\\tubiao.png")); //左上角图标
setTitle("\u6C34\u679C\u644A");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 600, 600);
JMenuBar menuBar = new JMenuBar();
menuBar.setToolTipText("");
setJMenuBar(menuBar);
JMenu menu = new JMenu("\u9875\u9762\u9009\u62E9");
menuBar.add(menu);
Monitor2 monitor = new Monitor2();
JMenu menu_1 = new JMenu("\u7BA1\u7406\u5458\u754C\u9762");
menu_1.setIcon(new ImageIcon("D:\\eclip\\FruitV\\src\\556.png")); //管理员图标
menu.add(menu_1);
JMenuItem menuItem = new JMenuItem("\u767B\u5F55");
menu_1.add(menuItem);
menuItem.addActionListener(monitor);
JMenuItem menuItem_2 = new JMenuItem("\u987E\u5BA2\u754C\u9762");
menuItem_2.setIcon(new ImageIcon("D:\\eclip\\FruitV\\src\\557.png")); //登录图标
menu.add(menuItem_2);
menuItem_2.addActionListener(monitor);
contentPane = new JPanel();
contentPane.setBackground(Color.WHITE);
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel lblNewLabel_1 = new JLabel("");
lblNewLabel_1.setBounds(0, 71, 584, 465);
lblNewLabel_1.setIcon(new ImageIcon("D:\\eclip\\FruitV\\src\\122.png")); //顾客图标
contentPane.add(lblNewLabel_1);
JLabel label = new JLabel("\u6B22\u8FCE\u6765\u5230\u6C34\u679C\u644A");
label.setBounds(245, 0, 99, 71);
contentPane.add(label);
JLabel lblNewLabel = new JLabel("");
lblNewLabel.setIcon(new ImageIcon("D:\\eclip\\FruitV\\src\\lan.png")); //窗口上方蓝色方块
lblNewLabel.setBackground(Color.GREEN);
lblNewLabel.setBounds(0, 0, 584, 71);
contentPane.add(lblNewLabel);
ImageIcon ig = new ImageIcon("D:\\eclip\\FruitV\\src\\tubiao.png"); //左上角图标
ImageIcon img = new ImageIcon("D:\\eclip\\FruitV\\src\\QQ图片20210420205633.png"); //窗口背景图
JLabel imgLabel = new JLabel(img);
this.getLayeredPane().add(imgLabel, new Integer(Integer.MIN_VALUE));
imgLabel.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());
}
}
class Monitor2 implements ActionListener {
public void actionPerformed(ActionEvent e) {
//System.out.println("有响应");
String buttonName = e.getActionCommand();
if(buttonName.equals("登录")) {
logon.star();
}
if(buttonName.equals("顾客界面")) {
System.out.println("顾客界面");
userInterface.start();
}
}
}
用户购买水果界面
package com.vector.view;
import java.awt.Image;
import java.awt.List;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.jar.JarFile;
import javax.swing.*;
import com.vector.dao.Fruit;
import com.vector.service.UFruitDao;
public class userInterface extends JFrame {
public static ArrayList <Fruit> list;
static double x;
JPanel contentPane;
Image im;
Box boxH, boxH1;
Box boxVOne, boxVTwo;
Box button, show;
Box show1, show2;
public static JTextArea a1,a2;
public userInterface() {
setLayout(new java.awt.FlowLayout());
setResizable(false);
contentPane = new JPanel();
setContentPane(contentPane);
contentPane.setOpaque(false);
setVisible(true);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
init();
}
void init() {
ImageIcon ig = new ImageIcon("D:\\eclip\\FruitV\\src\\tubiao.png");
im = ig.getImage();
setIconImage(im);
ImageIcon img = new ImageIcon("D:\\eclip\\FruitV\\src\\beijing.png");
JLabel imgLabel = new JLabel(img);
this.getLayeredPane().add(imgLabel, new Integer(Integer.MIN_VALUE));
imgLabel.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());
boxH = Box.createHorizontalBox();
boxVOne = Box.createVerticalBox();
boxVTwo = Box.createVerticalBox();
button = Box.createHorizontalBox();
show = Box.createVerticalBox();
show1 = Box.createVerticalBox();
show2 = Box.createVerticalBox();
boxH1 = Box.createHorizontalBox();
JTextField t1 = new JTextField(10);
JTextField t2 = new JTextField(10);
JTextField t3 = new JTextField(10);
a1 = new JTextArea(9, 30);
a2 = new JTextArea(4, 30);
JScrollPane s1=new JScrollPane(a1);
JScrollPane s2=new JScrollPane(a2);
JButton b1 = new JButton("确定添加");
JButton b2 = new JButton("确定购买");
JButton b3 = new JButton("确定付款");
boxVOne.add(new JLabel("水果名称:"));
boxVOne.add(new JLabel("水果数量（斤）："));
boxVTwo.add(t1);
boxVTwo.add(t2);
button.add(b1);
show.add(s1);
show.add(Box.createVerticalStrut(20));
show.add(Box.createHorizontalStrut(110));
show.add(b2);
show.add(Box.createVerticalStrut(20));
boxH.add(boxVOne);
boxH.add(Box.createHorizontalStrut(10));
boxH.add(boxVTwo);
boxH.add(button);
add(boxH);
add(show);
boxH1.add(new JLabel("请付款："));
boxH1.add(Box.createHorizontalStrut(10));
boxH1.add(t3);
boxH1.add(b3);
show2.add(boxH1);
show2.add(Box.createVerticalStrut(10));
show2.add(s2);
add(show1);
add(show2);
Monitor1 monitor =new Monitor1();
b1.addActionListener(monitor);
b2.addActionListener(monitor);
b3.addActionListener(monitor);
monitor.setText1(t1);
monitor.setText2(t2);
monitor.setText3(t3);
}
public class Monitor1 implements ActionListener {
JTextField text1,text2,text3;
public void setText1(JTextField text1) {
this.text1 = text1;
}
public void setText2(JTextField text2) {
this.text2 = text2;
}
public void setText3(JTextField text3) {
this.text3 = text3;
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String buttonName = e.getActionCommand();
try {
if(buttonName.equals("确定添加")) {
String name=text1.getText();
String number0 = (String) text2.getText();
int number = Integer.valueOf(number0.toString());
list =new ArrayList<>();
list = (ArrayList<Fruit>) UFruitDao.Uadd(name, number);
a1.setText("");
for (Fruit s : list) {
//System.out.println(s.toString());
a1.append(s.toString()+"\n");
}
System.out.println("添加成功！");
}
if(buttonName.equals("确定购买")) {
x=0;
for (Fruit s : list) {
x+=s.getNumber()*s.getPrice();
}
a1.append("请付款："+x+"元。"+"\n");
}
if(buttonName.equals("确定付款")) {
String money0 = (String) text3.getText();
double money = Double.valueOf(money0.toString());
double s=money-x;
a2.setText("");
if(s>0) {
//System.out.println("付款成功，找你"+s+"元。");
a2.append("付款成功，找你"+s+"元,慢走不送！");
}
if(s==0) {
//System.out.println("付款成功，刚好够");
a2.append("付款成功，刚好够,慢走不送！");
}
if(s<0) {
//System.out.println("付款失败，钱不够");
a2.append("付款失败，钱不够。");
}
}
}catch(Exception e2) {
System.out.println("添加失败，请按要求输入！");
}
}
}
public static void start() {
userInterface win = new userInterface();
win.setBounds(100, 100, 600, 600);
win.setTitle("水果摊");
}
}
管理员登录界面
package com.vector.test;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import com.vector.view.admInterface;
import javax.swing.JLabel;
import java.awt.Color;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JButton;
import javax.swing.ImageIcon;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class logon extends JFrame {
private JPanel contentPane;
private JTextField textField;
private JPasswordField passwordField;
/**
* Launch the application.
*/
public static void star() {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
logon frame = new logon();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public logon() {
setIconImage(Toolkit.getDefaultToolkit().getImage("D:\\eclip\\FruitV\\src\\556.png"));
setTitle("\u7BA1\u7406\u5458\u767B\u5F55\u7CFB\u7EDF");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 600, 600);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel label = new JLabel("\u7BA1\u7406\u5458\u767B\u5F55\u7CFB\u7EDF");
label.setForeground(new Color(139, 0, 139));
label.setBounds(239, 38, 112, 15);
contentPane.add(label);
JLabel label_1 = new JLabel("\u7528\u6237\u540D\uFF1A");
label_1.setBounds(120, 98, 54, 15);
contentPane.add(label_1);
textField = new JTextField();
textField.setText("1+1=\uFF1F");
textField.setBounds(179, 95, 214, 21);
contentPane.add(textField);
textField.setColumns(10);
JLabel label_2 = new JLabel("\u5BC6\u7801\uFF1A");
label_2.setBounds(120, 162, 54, 15);
contentPane.add(label_2);
Monitor3 monitor =new Monitor3();
passwordField = new JPasswordField();
passwordField.setBounds(179, 159, 214, 18);
contentPane.add(passwordField);
monitor.setP1(passwordField);
JButton button = new JButton("\u767B\u5F55");
button.setBounds(193, 228, 93, 23);
contentPane.add(button);
button.addActionListener(monitor);
JButton button_1 = new JButton("\u9000\u51FA");
button_1.setBounds(296, 228, 93, 23);
contentPane.add(button_1);
button_1.addActionListener(monitor);
JLabel label_4 = new JLabel("\u731C\u731C\u5BC6\u7801\u662F\u4EC0\u4E48......");
label_4.setForeground(new Color(139, 0, 0));
label_4.setBounds(231, 341, 176, 15);
contentPane.add(label_4);
JLabel lblNewLabel = new JLabel("");
lblNewLabel.setIcon(new ImageIcon("D:\\eclip\\FruitV\\src\\dongtai.gif"));
lblNewLabel.setBounds(231, 379, 123, 99);
contentPane.add(lblNewLabel);
JLabel lblNewLabel_1 = new JLabel("");
lblNewLabel_1.setBounds(401, 162, 106, 15);
contentPane.add(lblNewLabel_1);
}
}
class Monitor3 implements ActionListener {
JPasswordField p1;
public void setP1(JPasswordField p1) {
this.p1 = p1;
}
public void actionPerformed(ActionEvent e) {
String s=p1.getText();
String buttname=e.getActionCommand();
if(buttname.equals("登录")) {
if(s.equals("2")) {
admInterface.start();
}else {
System.out.println("密码错误！");
}
}
if(buttname.equals("退出")) {
System.exit(0);
}
}
}
管理员界面
package com.vector.view;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.swing.Box;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import com.vector.dao.Fruit;
import com.vector.service.FruitDao;
import com.vector.units.ConnectMsql;
public class admInterface extends JFrame {
public static JTextArea a1;
public static JTextArea a2;
Image im;
public static Fruit fruit;
public admInterface() {
setLayout(new FlowLayout());
setVisible(true);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
ImageIcon ig = new ImageIcon("D:\\eclip\\FruitV\\src\\tubiao.png");
im = ig.getImage();
setIconImage(im);
// Component H= Box.createHorizontalStrut(10);
// Component V= Box.createVerticalStrut(10);
Box boxH1 = Box.createHorizontalBox();
Box boxH2 = Box.createHorizontalBox();
Box boxH3 = Box.createHorizontalBox();
Box boxH4 = Box.createHorizontalBox();
Box boxH5 = Box.createHorizontalBox();
Box boxV = Box.createVerticalBox();
JTextField t1 = new JTextField(10);
JTextField t2 = new JTextField(10);
JTextField t3 = new JTextField(10);
JTextField t4 = new JTextField(10);
JTextField t5 = new JTextField(10);
JButton B1 = new JButton("确定添加");
JButton B2 = new JButton("确定删除");
JButton B3 = new JButton("确定修改");
JButton B4 = new JButton("刷新");
a1 = new JTextArea(8, 20);
a2 = new JTextArea(11, 20);
JScrollPane scroll1 = new JScrollPane(a1);
JScrollPane scroll2 = new JScrollPane(a2);
boxH1.add(new JLabel("水果名称:"));
boxH1.add(t1);
boxH1.add(Box.createHorizontalStrut(10));
boxH1.add(new JLabel("水果价格（/斤）:"));
boxH1.add(t2);
boxH1.add(Box.createHorizontalStrut(10));
boxH1.add(B1);
boxH2.add(new JLabel("水果名称:"));
boxH2.add(Box.createHorizontalStrut(10));
boxH2.add(t3);
boxH2.add(Box.createHorizontalStrut(10));
boxH2.add(B2);
boxH3.add(new JLabel("水果名称："));
boxH3.add(Box.createHorizontalStrut(10));
boxH3.add(t4);
boxH3.add(Box.createHorizontalStrut(10));
boxH3.add(new JLabel("水果新价格（/斤）："));
boxH3.add(Box.createHorizontalStrut(10));
boxH3.add(t5);
boxH3.add(B3);
boxH4.add(new JLabel("操作结果:"));
boxH4.add(Box.createHorizontalStrut(10));
boxH4.add(scroll1);
boxH5.add(new JLabel("水果列表:"));
boxH5.add(Box.createHorizontalStrut(10));
boxH5.add(scroll2);
boxV.add(Box.createVerticalStrut(10));
boxV.add(new JLabel("增加水果"));
boxV.add(Box.createVerticalStrut(10));
boxV.add(boxH1);
boxV.add(Box.createVerticalStrut(20));
boxV.add(new JLabel("删除水果"));
boxV.add(Box.createVerticalStrut(10));
boxV.add(boxH2);
boxV.add(Box.createVerticalStrut(20));
boxV.add(new JLabel("更改水果价格"));
boxV.add(Box.createVerticalStrut(10));
boxV.add(boxH3);
boxV.add(Box.createVerticalStrut(20));
boxV.add(boxH4);
boxV.add(Box.createVerticalStrut(20));
boxV.add(boxH5);
boxV.add(Box.createVerticalStrut(10));
boxV.add(B4);
add(boxV);
Monitor monitor = new Monitor();
B1.addActionListener(monitor);
B2.addActionListener(monitor);
B3.addActionListener(monitor);
B4.addActionListener(monitor);
monitor.settext1(t1);
monitor.settext2(t2);
monitor.settext3(t3);
monitor.settext4(t4);
monitor.settext5(t5);
}
public class Monitor implements ActionListener {
JTextField text1, text2, text3, text4, text5;
public void settext1(JTextField str) {
text1 = str;
}
public void settext2(JTextField str) {
text2 = str;
}
public void settext3(JTextField str) {
text3 = str;
}
public void settext4(JTextField str) {
text4 = str;
}
public void settext5(JTextField str) {
text5 = str;
}
public void actionPerformed(ActionEvent e) {
String buttonName = e.getActionCommand();
try {
if (buttonName.equals("确定添加")) {
String name = text1.getText();
String price0 = (String) text2.getText();
double price = Double.valueOf(price0.toString());
// System.out.println(name + price);
fruit = new Fruit(name, price, 0);
String s = FruitDao.add(fruit);
a1.append(s + "\n");
ConnectMsql.closeConnection();
}
if (buttonName.equals("确定删除")) {
String name = text3.getText();
String s = null;
try {
s = FruitDao.delete(name);
} catch (Exception e1) {
// TODO Auto-generated catch block
// e1.printStackTrace();
System.out.println("添加失败，请输入正确的格式！");
}
a1.append(s + "\n");
ConnectMsql.closeConnection();
}
if (buttonName.equals("确定修改")) {
String name = text4.getText();
// System.out.println(name);
String price0 = (String) text5.getText();
String s = null;
double price = Double.valueOf(price0.toString());
try {
s = FruitDao.change(name, price);
} catch (Exception e2) {
e2.printStackTrace();
}
a1.append(s + "\n");
ConnectMsql.closeConnection();
}
if (buttonName.equals("刷新")) {
ResultSet rs = FruitDao.list();
try {
a2.setText("");
while (rs.next()) {
a2.append("序号：" + rs.getInt("id") + ", 水果名称：" + rs.getString("name") + ", 水果价格："
+ rs.getDouble("price") + " \n");
}
} catch (SQLException e1) {
// TODO Auto-generated catch block
System.out.println("添加失败，请输入正确的格式！");
// e1.printStackTrace();
}
ConnectMsql.closeConnection();
}
} catch (Exception e1) {
System.out.println("添加失败，请依照正确格式输入！");
a1.append("添加失败，请依照正确格式输入！");
}
}
}
public static void start() {
admInterface win = new admInterface();
win.setBounds(100, 100, 600, 700);
win.setTitle("管理员页面");
}
}
3.水果属性
package com.vector.dao;
public class Fruit {
private String name;
private double price;
private int number;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
public Fruit( String name, double price, int number) {
this.name = name;
this.price = price;
this.number = number;
}
public String toString() {
return "水果名称："+name+",水果价格："+price+",购买水果数量："+number;
}
}
4.main方法
package com.vector.domain;
import com.vector.view.selInterface;
public class mainV {
public static void main(String[] args) {
selInterface.star();
}
}
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