JAVA语言程序设计实验 (新)

2024-07-16 11:35| 来源: 网络整理| 查看: 265

需求分析

程序设计的任务是实现对学生信息的管理。用户名和密码都默认设置为0，用户名或密码输入错误会弹出“用户名或密码输入不正确”的对话框。在用户名和密码输入正确后进入学生信息管理系统，然后进行添加、修改、删除、统计等操作。添加学生记录：输入学号、姓名、高等数学、英语。点击保存则自动跳转显示学生记录列表的页面。来分页展示学生记录列表。这个页面有查询，删除，修改，退出显示等按钮。

概要设计

1、类之间的调用关系

2、学生信息E-R图

详细设计主程序Starter的代码

主要实现了信息管理窗口，还有对各个服务的依赖掉用等功能。

package com.paper.view; import com.paper.entity.Statistics; import com.paper.entity.Student; import com.paper.service.StudentService; import com.paper.table.MyJTable; import javax.swing.*; import javax.swing.table.DefaultTableModel; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class Starter { public static void main(String args[])throws Exception{ new Starter().init(); } private JFrame jf=new JFrame("学生信息管理系统"); Dimension faceSize=new Dimension(800,600); private Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize(); //按学号查询 private JPanel pSelect=new JPanel(); private JButton bNoSelect=new JButton("按学号序显示"); private JButton bNameSelect=new JButton("按姓名序显示"); private JButton bScoreSelect=new JButton("按成绩序显示"); private JButton bLogout=new JButton("退出系统"); //查询结果放在一个JTable private MyJTable table; private DefaultTableModel tableModel; private JScrollPane tableScrollPane; private Object[] tableTitle={"学号","姓名","计算机","高等数学","英语"}; private Object[][]tableData={new Object[]{""}}; //对学生信息进行管理的添加、删除、修改按钮 private JPanel buttonPanel=new JPanel(); private JButton insert=new JButton("添加"); private JButton delete=new JButton("删除"); private JButton update=new JButton("修改"); private JButton statistics=new JButton("统计"); //单机添加、修改时弹出的对话框 private JDialog dialog=new JDialog(jf,"学生管理"); private Box box=Box.createVerticalBox(); private JPanel pPhoto=new JPanel(new FlowLayout(FlowLayout.LEFT)); private JPanel pId=new JPanel(new FlowLayout(FlowLayout.LEFT)); private JPanel pName=new JPanel(new FlowLayout(FlowLayout.LEFT)); private JPanel pComputer=new JPanel(new FlowLayout(FlowLayout.LEFT)); private JPanel pAdvancedMath=new JPanel(new FlowLayout(FlowLayout.LEFT)); private JPanel pEnglish=new JPanel(new FlowLayout(FlowLayout.LEFT)); private JLabel lId=new JLabel("学号"); private JLabel lName=new JLabel("姓名"); private JLabel lComputer=new JLabel("计算机"); private JLabel lAdvancedMath=new JLabel("高等数学"); private JLabel lEnglish=new JLabel("英语"); private JTextField tId=new JTextField(15); private JTextField tName=new JTextField(15); private JTextField tComputer= new JTextField(15); private JTextField tAdvancedMath=new JTextField(15); private JTextField tEnglish=new JTextField(15); private JPanel pButton=new JPanel(); private JButton confirm=new JButton("确认"); private JButton cancel=new JButton("取消"); private StudentService service=new StudentService(); //用于标记是添加还是修改 private String id; public void init(){ pSelect.add(bNoSelect); pSelect.add(bNameSelect); pSelect.add(bScoreSelect); pSelect.add(bLogout); //查询按钮的监听器 bNoSelect.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ java.util.List student = service.selectAll(1); clearTable(); for(Student s:student){ insertTable(s); } } }); //查询按钮的监听器 bNameSelect.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ java.util.List student = service.selectAll(2); clearTable(); for(Student s:student){ insertTable(s); } } }); //查询按钮的监听器 bScoreSelect.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ java.util.List student = service.selectAll(3); clearTable(); for(Student s:student){ insertTable(s); } } }); //退出系统 bLogout.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ System.exit(0); } }); //table tableModel=new DefaultTableModel(tableData,tableTitle); table=new MyJTable(tableModel); tableScrollPane=new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED ); //button buttonPanel.add(insert); buttonPanel.add(delete); buttonPanel.add(update); buttonPanel.add(statistics); //添加按钮的监听器 insert.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ //如果是添加，则将id=null; id=null; tId.setText(""); tId.setEditable(true); tName.setText(""); tComputer.setText(""); tAdvancedMath.setText(""); tEnglish.setText(""); dialog.setVisible(true); } }); //删除按钮的监听器 delete.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ //获得选择删除的行号数组 int[] selected=table.getSelectedRows(); //如果selected的长度为0，说明没有选择要删除的 if(selected.length==0){ JOptionPane.showMessageDialog(jf, "请选择要删除的信息！","提示",JOptionPane.WARNING_MESSAGE ); }else{ //提示是否要进行删除 int flag=JOptionPane.showConfirmDialog(jf, "确认删除吗？","提示",JOptionPane.WARNING_MESSAGE ); //如果选择是，则进行删除 if(flag==JOptionPane.OK_OPTION ){ for(int i=selected.length-1;i>=0;i--){ service.delete((String)tableModel.getValueAt(selected[i], 0)); tableModel.removeRow(selected[i]); } } } } }); //统计按钮的监听器 statistics.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ Statistics statistics = service.statistics(); new StatisticsView().init(statistics); } }); //修改按钮的监听器 update.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ int row=table.getSelectedRow(); //如果要进行修改，就将id=要修改的学号 id=String.valueOf(table.getValueAt(row, 0)); //设置tId的内容 tId.setText(id); //设置tId不可修改 tId.setEditable(false); tName.setText(String.valueOf(table.getValueAt(row, 1))); tComputer.setText(String.valueOf(table.getValueAt(row, 2))); tAdvancedMath.setText(String.valueOf(table.getValueAt(row, 3))); tEnglish.setText(String.valueOf(table.getValueAt(row, 4))); //设置dialog可见 dialog.setVisible(true); } }); jf.setLayout(new BorderLayout()); //设置pSelect在jf的北面 jf.add(pSelect,BorderLayout.NORTH); //设置pSelect在jf的中心 jf.add(tableScrollPane,BorderLayout.CENTER ); //设置pSelelct在jf的南面 jf.add(buttonPanel,BorderLayout.SOUTH); jf.pack(); jf.setSize(faceSize); jf.setLocation((int)(screenSize.width-faceSize.getWidth())/2,(int)(screenSize.height-faceSize.getHeight())/2); jf.setResizable(false); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setVisible(true); pId.add(lId); pId.add(tId); pName.add(lName); pName.add(tName); pComputer.add(lComputer); pComputer.add(tComputer); pAdvancedMath.add(lAdvancedMath); pAdvancedMath.add(tAdvancedMath); pEnglish.add(lEnglish); pEnglish.add(tEnglish); pButton.add(confirm); pButton.add(cancel); //确定按钮的监听器 confirm.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ Student student=new Student(); student.setUserId(tId.getText()); student.setPassword(tId.getText()); student.setId(tId.getText()); student.setName(tName.getText()); student.setComputer(toDouble(tComputer.getText())); student.setAdvancedMath(toDouble(tAdvancedMath.getText())); student.setEnglish(toDouble(tEnglish.getText())); if(id!=null){ service.update(student); }else{ service.insert(student); } dialog.dispose(); } }); //取消按钮的监听器 cancel.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e){ dialog.dispose(); } }); box.add(pPhoto); box.add(pId); box.add(pName); box.add(pComputer); box.add(pAdvancedMath); box.add(pEnglish); box.add(pButton); box.add(pButton); dialog.add(box); dialog.setBounds((int)(screenSize.width-280)/2,(int)(screenSize.height-300)/2,280,350); } public void insertTable(Student student){ if(student!=null){ String[]newCell=new String[7]; newCell[0]=student.getId(); newCell[1]=student.getName(); newCell[2]=student.getComputer().toString(); newCell[3]=student.getAdvancedMath().toString(); newCell[4]=student.getEnglish().toString(); tableModel.addRow(newCell); } } public void clearTable(){ int rows=tableModel.getRowCount(); for(int i=0 ;i { Double computer = student.getComputer(); Double advancedMath = student.getAdvancedMath(); Double english = student.getEnglish(); Double sum = computer+advancedMath+english; return sum; })).collect(Collectors.toList()); break; default: break; } return studentList; } /** * 统计学生信息 * @return */ public Statistics statistics(){ List studentList = new ArrayList(students.values()); Integer excellentQty = 0; Integer goodQty= 0; Integer averageQty= 0; Integer passQty= 0; Integer failQty= 0; BigDecimal highestScoreD= new BigDecimal(0); BigDecimal minimumScoreD= new BigDecimal(0); BigDecimal totalScore= new BigDecimal(0); for (Student student : studentList) { //60分以下为不及格 int i = checkScore(student); switch (i){ case 1: excellentQty++; break; case 2: goodQty++; break; case 3: averageQty++; break; case 4: passQty++; break; case 5: failQty++; break; } Double computer = student.getComputer(); Double advancedMath = student.getAdvancedMath(); Double english = student.getEnglish(); BigDecimal computerD = new BigDecimal(computer); BigDecimal advancedMathD = new BigDecimal(advancedMath); BigDecimal englishD = new BigDecimal(english); BigDecimal sumDecimal = computerD.add(advancedMathD).add(englishD); totalScore.add(sumDecimal); if(highestScoreD.compareTo(sumDecimal) < 0){ highestScoreD = sumDecimal; }else if(highestScoreD.compareTo(sumDecimal) > 0){ minimumScoreD = sumDecimal; } } BigDecimal excellentQtyD = new BigDecimal(excellentQty); BigDecimal goodQtyD = new BigDecimal(goodQty); BigDecimal averageQtyD = new BigDecimal(averageQty); BigDecimal passQtyD = new BigDecimal(passQty); BigDecimal failQtyD = new BigDecimal(failQty); BigDecimal sumD = excellentQtyD.add(goodQtyD).add(averageQtyD).add(passQtyD).add(failQtyD); Double passRate = sumD.subtract(failQtyD).divide(sumD).doubleValue(); Integer totalQty= sumD.intValue(); Double excellentRatio = excellentQtyD.divide(sumD, 1, BigDecimal.ROUND_HALF_UP).doubleValue(); Double goodRatio = goodQtyD.divide(sumD,1,BigDecimal.ROUND_HALF_UP).doubleValue(); Double averageRatio = averageQtyD.divide(sumD,1,BigDecimal.ROUND_HALF_UP).doubleValue(); Double passRatio = passQtyD.divide(sumD,1,BigDecimal.ROUND_HALF_UP).doubleValue(); Double failRatio = failQtyD.divide(sumD,1,BigDecimal.ROUND_HALF_UP).doubleValue(); Double averageScore = totalScore.divide(sumD).doubleValue(); Statistics statistics = new Statistics(); statistics.setExcellentQty(excellentQty); statistics.setExcellentRatio(excellentRatio); statistics.setGoodQty(goodQty); statistics.setGoodRatio(goodRatio); statistics.setAverageQty(averageQty); statistics.setAverageRatio(averageRatio); statistics.setPassQty(passQty); statistics.setPassRatio(passRatio); statistics.setFailQty(failQty); statistics.setFailRatio(failRatio); statistics.setTotalQty(totalQty); statistics.setPassRate(passRate); statistics.setHighestScore(highestScoreD.doubleValue()); statistics.setMinimumScore(minimumScoreD.doubleValue()); statistics.setAverageScore(averageScore); return statistics; } /** * 校验学生是分数 * 100分满分 * 总分大于等于270分为优秀返回1 * 总分大于等于240分且小于270分为良好返回2 * 总分大于等于210分且小于240分为中等返回3 * 总分大于等于180分且小于210分为及格返回4 * 有一科分数小于60分为不及格返回5 * @param student */ private int checkScore(Student student) { Double computer = student.getComputer(); Double advancedMath = student.getAdvancedMath(); Double english = student.getEnglish(); if(computer=0){ return 3; }else{ return 4; } } }

Student类

学生类，具体学生信息

package com.paper.entity; public class Student extends User{ private String id; private String name; private Double computer; private Double advancedMath; private Double english; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Double getComputer() { return computer; } public void setComputer(Double computer) { this.computer = computer; } public Double getAdvancedMath() { return advancedMath; } public void setAdvancedMath(Double advancedMath) { this.advancedMath = advancedMath; } public Double getEnglish() { return english; } public void setEnglish(Double english) { this.english = english; } } 统计表 package com.paper.entity; public class Statistics { private Integer excellentQty; private Double excellentRatio; private Integer goodQty; private Double goodRatio; private Integer averageQty; private Double averageRatio; private Integer passQty; private Double passRatio; private Integer failQty; private Double failRatio; private Integer totalQty; private Double passRate; private Double highestScore; private Double minimumScore; private Double averageScore; public Integer getExcellentQty() { return excellentQty; } public void setExcellentQty(Integer excellentQty) { this.excellentQty = excellentQty; } public Double getExcellentRatio() { return excellentRatio; } public void setExcellentRatio(Double excellentRatio) { this.excellentRatio = excellentRatio; } public Integer getGoodQty() { return goodQty; } public void setGoodQty(Integer goodQty) { this.goodQty = goodQty; } public Double getGoodRatio() { return goodRatio; } public void setGoodRatio(Double goodRatio) { this.goodRatio = goodRatio; } public Integer getAverageQty() { return averageQty; } public void setAverageQty(Integer averageQty) { this.averageQty = averageQty; } public Double getAverageRatio() { return averageRatio; } public void setAverageRatio(Double averageRatio) { this.averageRatio = averageRatio; } public Integer getPassQty() { return passQty; } public void setPassQty(Integer passQty) { this.passQty = passQty; } public Double getPassRatio() { return passRatio; } public void setPassRatio(Double passRatio) { this.passRatio = passRatio; } public Integer getFailQty() { return failQty; } public void setFailQty(Integer failQty) { this.failQty = failQty; } public Double getFailRatio() { return failRatio; } public void setFailRatio(Double failRatio) { this.failRatio = failRatio; } public Integer getTotalQty() { return totalQty; } public void setTotalQty(Integer totalQty) { this.totalQty = totalQty; } public Double getPassRate() { return passRate; } public void setPassRate(Double passRate) { this.passRate = passRate; } public Double getHighestScore() { return highestScore; } public void setHighestScore(Double highestScore) { this.highestScore = highestScore; } public Double getMinimumScore() { return minimumScore; } public void setMinimumScore(Double minimumScore) { this.minimumScore = minimumScore; } public Double getAverageScore() { return averageScore; } public void setAverageScore(Double averageScore) { this.averageScore = averageScore; } }

User类

用户类。如果登录用于登录操作

package com.paper.entity; public class User { private String userId; private String password; public String getUserId() { return userId; } public void setUserId(String userId) { this.userId = userId; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }

StatisticsView类

用于展示统计信息

package com.paper.view; import com.paper.entity.Statistics; import com.paper.table.MyJTable; import javax.swing.*; import javax.swing.table.DefaultTableModel; import java.awt.*; public class StatisticsView{ private JFrame jf=new JFrame("学生信息管理系统"); Dimension faceSize=new Dimension(800,600); private Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize(); private DefaultTableModel tableModel; private Object[] tableTitle={"统计学生记录"}; private Object[][]tableData={new Object[]{""}}; private MyJTable table; private JScrollPane tableScrollPane; private Box box=Box.createVerticalBox(); public void init(Statistics statistics) { jf.setResizable(false); jf.setVisible( true); jf.pack(); //用户单击窗口的关闭按钮时程序执行的操作 jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setLocation((int)(screenSize.width-faceSize.getWidth())/2,(int)(screenSize.height-faceSize.getHeight())/2); //table tableModel=new DefaultTableModel(tableData,tableTitle); table=new MyJTable(tableModel); tableScrollPane=new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED ); //设置pSelect在jf的中心 jf.add(tableScrollPane,BorderLayout.CENTER ); jf.setSize(faceSize); //封装表格 showStatisticsTable(statistics); } private void showStatisticsTable(Statistics statistics) { clearTable(); insertTable("优秀学生人数："+ integerToString(statistics.getExcellentQty())); insertTable("优秀学生占比："+ doubleToString(statistics.getExcellentRatio())); insertTable("良好学生人数："+ integerToString(statistics.getGoodQty())); insertTable("良好学生占比："+ doubleToString(statistics.getGoodRatio())); insertTable("中等学生人数："+ integerToString(statistics.getAverageQty())); insertTable("中等学生占比："+ doubleToString(statistics.getAverageRatio())); insertTable("及格学生人数："+ integerToString(statistics.getPassQty())); insertTable("及格学生人数："+ doubleToString(statistics.getPassRatio())); insertTable("不及格学生人数："+ integerToString(statistics.getFailQty())); insertTable("不及格学生人数："+ doubleToString(statistics.getFailRatio())); insertTable("总学生人数："+ integerToString(statistics.getTotalQty())); insertTable("学生及格率："+ doubleToString(statistics.getPassRate())); insertTable("学生成绩最高分："+ doubleToString(statistics.getHighestScore()) +" 分"); insertTable("学生成绩最低分："+ doubleToString(statistics.getMinimumScore()) +" 分"); insertTable("学生成绩平均分："+ doubleToString(statistics.getAverageScore()) +" 分"); } private String doubleToString(Double value) { if(value == null){ return ""; } return String.valueOf(value); } private String integerToString(Integer value) { if(value == null){ return ""; } return String.valueOf(value)+" 人"; } public void insertTable(String value){ System.out.println(11111); if(value!=null && ! "".equals(value)){ String[]newCell=new String[1]; newCell[0]=value; tableModel.addRow(newCell); } } public void clearTable(){ int rows=tableModel.getRowCount(); for(int i=0 ;i

【本文地址】

公司简介

联系我们