第二次作业
一、实验目的：
1.掌握软件开发的基本流程
2.掌握常用的软件开发方式和工具。
二、实验内容：
设计一个包含登录界面的计算器软件，该软件可以实现第一次作业中的全部功能，同时可以保存用户的历史计算记录（保存数据最好使用数据库）。
三、程序流程图
登陆流程图
注册流程图
四、UI设计
用户打开网页
打开浏览器，在地址栏中输入http://localhost:8080/10，并按下Enter键。
用户成功登陆
输入账户用户名mr
密码123456
用户注册
用户名123456
密码123456
确认密码123456
邮箱111122233@163.com
计算器实现计算
加法
减法
乘法
除法
登陆注册代码
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
DynaActionForm userLoginForm = (DynaActionForm) form;
UserLogin userLogin = userLoginDao.findbyNameAndPwd(userLoginForm
.getString("loginName"), userLoginForm.getString("pwd"));
if (userLogin == null) {
request.setAttribute("error", "用户登录失败，用户名或密码不正确！");
return mapping.findForward("index");
} else {
request.getSession().setAttribute("loginName",
userLogin.getLoginName());
request.getSession().setAttribute("id", userLogin.getId());
if (userLogin.getType().equals("1")) {
System.out.println("管理员登录");
return mapping.findForward("manager");
} else {
// 判断学生有没有填写过基本信息
StuUser stuUser = stuUserDao.findById(userLogin.getId());
if (stuUser == null) {
System.out.println("没添写过基础信息");
List<Specialty> list = specialtyDao.findStuByAll();
request.setAttribute("list", list);
return mapping.findForward("addStuInfo");
} else {
Specialty specialty = specialtyDao.findById(stuUser
.getSpecialtyId());
request.setAttribute("specialty", specialty);
request.setAttribute("stuUser", stuUser);
System.out.println("添写过基础信息");
return mapping.findForward("welcome");
}
}
}
}
}
package com.jwy.dto;
public class UserLogin implements java.io.Serializable {
private Integer id;
private String loginName;
private String pwd;
private String type;
private String mail;
// Constructors
/** default constructor */
public UserLogin() {
}
/** full constructor */
public UserLogin(String loginName, String pwd, String type, String mail) {
this.loginName = loginName;
this.pwd = pwd;
this.type = type;
this.mail = mail;
}
// Property accessors
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLoginName() {
return this.loginName;
}
public void setLoginName(String loginName) {
this.loginName = loginName;
}
public String getPwd() {
return this.pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
public String getType() {
return this.type;
}
public void setType(String type) {
this.type = type;
}
public String getMail() {
return this.mail;
}
public void setMail(String mail) {
this.mail = mail;
}
}
计算器代码
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Calculator extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JPanel panel1, panel2, panel3;
private JTextField tfDisplay;
private JButton btn0, btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9, btnAdd, btnSubtract, btnMultiply, btnDivide, btnClear, btnEqual;
public Calculator() {
super("计算器");
// 创建面板
panel1 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel2 = new JPanel(new GridLayout(4, 4));
panel3 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
// 创建按钮和文本框
tfDisplay = new JTextField(20);
btn0 = new JButton("0");
btn1 = new JButton("1");
btn2 = new JButton("2");
btn3 = new JButton("3");
btn4 = new JButton("4");
btn5 = new JButton("5");
btn6 = new JButton("6");
btn7 = new JButton("7");
btn8 = new JButton("8");
btn9 = new JButton("9");
btnAdd = new JButton("+");
btnSubtract = new JButton("-");
btnMultiply = new JButton("*");
btnDivide = new JButton("/");
btnClear = new JButton("C");
btnEqual = new JButton "=");
// 添加按钮和文本框到面板
panel1.add(tfDisplay);
panel2.add(btn0);
panel2.add(btn1);
panel2.add(btn2);
panel2.add(btn3);
panel2.add(btn4);
panel2.add(btn5);
panel2.add(btn6);
panel2.add(btn7);
panel2.add(btn8);
panel2.add(btn9);
panel2.add(btnAdd);
panel2.add(btnSubtract);
panel2.add(btnMultiply);
panel2.add(btnDivide);
panel3.add(btnClear);
panel3.add(btnEqual);
// 设置按钮的监听器
btn0.addActionListener(this);
btn1.addActionListener(this);
btn2.addActionListener(this);
btn3.addActionListener(this);
btn4.addActionListener(this);
btn5.addActionListener(this);
btn6.addActionListener(this);
btn7.addActionListener(this);
btn8.addActionListener(this);
btn9.addActionListener(this);
btnAdd.addActionListener(this);
btnSubtract.addActionListener(this);
btnMultiply.addActionListener(this);
btnDivide.addActionListener(this);
btnClear.addActionListener(this);
btnEqual.addActionListener(this);
// 设置布局
setLayout(new BorderLayout());
add(panel1, BorderLayout.NORTH);
add(panel2, BorderLayout.CENTER);
add(panel3, BorderLayout.SOUTH);
// 设置默认文本框内容为 0
tfDisplay.setText("0");
}
public void actionPerformed(ActionEvent e) {
String btnText = e.getActionCommand();
if (btnText.equals("0")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("1")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("2")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("3")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("4")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("5")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("6")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("7")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("8")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("9")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("+")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("-")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("*")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("/")) {
tfDisplay.setText(tfDisplay.getText() + btnText);
} else if (btnText.equals("C")) {
tfDisplay.setText("0");
} else if (btnText.equals("=")) {
try {
double num = Double.parseDouble(tfDisplay.getText());
double result = 0;
if (btnText.equals("+")) {
result = num + Double.parseDouble(tfDisplay.getText());
} else if (btnText.equals("-")) {
result = num - Double.parseDouble(tfDisplay.getText());
} else if (btnText.equals("*")) {
result = num * Double.parseDouble(tfDisplay.getText());
} else if (btnText.equals("/")) {
if (Double.parseDouble(tfDisplay.getText()) != 0) {
result = num / Double.parseDouble(tfDisplay.getText());
} else {
throw new IllegalArgumentException("错误：除数不能为 0");
}
}
浙公网安备 33010602011771号