IO流+数据库课后习题

1，读取 试题文件 然后做题算分

        File file1=new File("D:\file","test.txt");
        try{
            FileReader in1=new FileReader(file1);
            BufferedReader in2=new BufferedReader(in1);
            String s;
            int count=0;
            for(;(s=in2.readLine())!=null;){
                if(!s.startsWith("-")){
                    System.out.println(s);
                }
                else{
                    System.out.print("input your answer: ");
                    s=s.replaceAll("-","");
                    String daan;
                    Scanner scanner1=new Scanner(System.in);
                    daan=scanner1.next();
                    if(s.equals(daan)){
                        count++;
                    }
                }
            }
            System.out.println("point "+count);
        }
        catch(Exception e){
            System.out.println(e.getMessage());
        }
    

---

2，用卡片布局做两个页面，来输入和输出

package testWin;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import java.awt.CardLayout;

public class TestWin implements ActionListener {
    //使用卡片式布局，由菜单栏调用两个页面
    private JFrame frame;
    File file1;
    JMenuItem input = new JMenuItem("input");
    JMenuItem show = new JMenuItem("show");
    InputArea inputMessage;
    CardLayout card;
    JPanel panel;
    JTextArea textArea;
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    TestWin window = new TestWin();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public TestWin() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        file1=new File("D:\file","test.txt");
        frame = new JFrame();
        frame.setBounds(100, 100, 450, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JMenuBar menuBar = new JMenuBar();
        frame.setJMenuBar(menuBar);
        
        JMenu menu = new JMenu("u83DCu5355");
        menuBar.add(menu);
        
        menu.add(input);
        
        menu.add(show);
        
        input.addActionListener(this);
        show.addActionListener(this);
        
        textArea=new JTextArea(12,50);
        inputMessage=new InputArea(file1);
        card=new CardLayout();
        panel=new JPanel();
        panel.setLayout(card);
        panel.add("input",inputMessage);
        panel.add("show",textArea);
        frame.add(panel);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO 自动生成的方法存根
        if(e.getSource()==input){
            card.show(panel, "input");
        }
        else if(e.getSource()==show){
            int number=1;
            textArea.setText(null);
            card.show(panel, "show");
            try{
                RandomAccessFile in=new RandomAccessFile(file1,"r");
                String name=null;
                for(;(name=in.readUTF())!=null;){
                    textArea.append("
"+"name :"+name);
                    textArea.append("	"+in.readUTF());
                    textArea.append("	"+in.readUTF());
                    textArea.append("
----------------------------------------------------------------------------");
                    number++;
                }
                
                in.close();
            }
            catch(Exception e1){
                System.out.println(e1.getMessage());
                System.out.println("2222");
            }
        }
    }

}

package testWin;

import javax.swing.JPanel;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;

import javax.swing.*;
import javax.swing.BoxLayout;
import javax.swing.JLabel;

public class InputArea extends JPanel implements ActionListener{

    /**
     * Create the panel.
     */
    File file1;
    RandomAccessFile out1;//运用盒式布局，然后用随机流输入到文件
    Box baseBox,box1,box2;
    JButton button1;
    private JLabel lblNewLabel;
    private JLabel lblNewLabel_1;
    private JLabel lblNewLabel_2;
    private JLabel lblNewLabel_3;
    private JTextField text1;
    private JTextField text2;
    private JTextField text3;
    private JButton button;
    public InputArea(File f) {
        setForeground(Color.CYAN);
        this.file1=f;
        baseBox=Box.createHorizontalBox();
        box1=Box.createVerticalBox();
        box2=Box.createVerticalBox();
        baseBox.add(box1);
        
        lblNewLabel = new JLabel("u8F93u5165u59D3u540D");
        box1.add(lblNewLabel);
        
        lblNewLabel_1 = new JLabel("u8F93u5165qq");
        box1.add(lblNewLabel_1);
        
        lblNewLabel_2 = new JLabel("u8F93u5165u7535u8BDD");
        box1.add(lblNewLabel_2);
        
        lblNewLabel_3 = new JLabel("u5355u51FBu5F55u5165");
        box1.add(lblNewLabel_3);
        baseBox.add(box2);
        
        text1 = new JTextField();
        box2.add(text1);
        text1.setColumns(10);
        
        text2 = new JTextField();
        box2.add(text2);
        text2.setColumns(10);
        
        text3 = new JTextField();
        box2.add(text3);
        text3.setColumns(10);
        
        button = new JButton("u5F55u5165");
        box2.add(button);
        add(baseBox);
        button.addActionListener(this);
        
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO 自动生成的方法存根
        try{
            RandomAccessFile out1=new RandomAccessFile(file1,"rw");
            long length=file1.length();
            out1.seek(length);
            out1.writeUTF("姓名 : "+text1.getText());
            out1.writeUTF("qq : "+text2.getText());
            out1.writeUTF("电话 : "+text3.getText());
            out1.close();
            text1.setText(null);
            text2.setText(null);
            text3.setText(null);
        }
        catch(Exception e1){
            System.out.println(e1.getMessage());
        }
    }
    
}

3,编译器（编译可以，链接有bug

主类

package testWin;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;

import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class TestFrame extends JFrame implements ActionListener{

    private JPanel contentPane;
    private JTextField text1;
    private JTextField text2;
    JButton button1 = new JButton("u7528u8BB0u4E8Bu672Cu7F16u8F91u6E90u6587u4EF6");
    JButton button2 = new JButton("u7F16u8BD1");
    JButton button3 = new JButton("u8FD0u884C");
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    TestFrame frame = new TestFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public TestFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 869, 111);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
        
        
        contentPane.add(button1);
        
        JLabel label = new JLabel("   u8F93u5165u6587u4EF6u540D uFF1A");
        contentPane.add(label);
        
        text1 = new JTextField();
        contentPane.add(text1);
        text1.setColumns(15);
        
        contentPane.add(button2);
        
        JLabel label_1 = new JLabel("   u8F93u5165u4E3Bu7C7Bu540DuFF1A");
        contentPane.add(label_1);
        
        text2 = new JTextField();
        contentPane.add(text2);
        text2.setColumns(13);
        
        contentPane.add(button3);
        button1.addActionListener(this);
        button2.addActionListener(this);
        button3.addActionListener(this);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO 自动生成的方法存根
        if(e.getSource()==button1){
            System.out.println("dd");
            Runtime ce=Runtime.getRuntime();
            File file1=new File("D:\javaWorkSpace\Test\src\test22","test2.java");
//            File file1=new File("D:\file","test.java");
            try{
                ce.exec(file1.getAbsolutePath());
            }
            catch(Exception e1){
                System.out.println(e1.getMessage());
            }
        }
        else if(e.getSource()==button2){
            CompileDialog compileDialog=new CompileDialog();
            String name=text1.getText();
            compileDialog.compile(name);
            compileDialog.setVisible(true);
        }
        else if(e.getSource()==button3){
            RunDialog runDialog=new RunDialog();
            String name=text2.getText();
            runDialog.run(name);
            runDialog.setVisible(true);
        }
    }

}

编译类

package testWin;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class CompileDialog extends JDialog {

    private final JPanel contentPanel = new JPanel();
    JTextArea textArea = new JTextArea(14,70);
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        try {
            CompileDialog dialog = new CompileDialog();
            dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
            dialog.setVisible(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Create the dialog.
     */
    public CompileDialog() {
        setBounds(100, 100, 871, 502);
        getContentPane().setLayout(new BorderLayout());
        contentPanel.setLayout(new FlowLayout());
        contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
        getContentPane().add(contentPanel, BorderLayout.CENTER);
        {
            JScrollPane scrollPane = new JScrollPane();
            contentPanel.add(scrollPane);
            {
                scrollPane.setViewportView(textArea);
            }
        }
        {
            JPanel buttonPane = new JPanel();
            buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
            getContentPane().add(buttonPane, BorderLayout.SOUTH);
            {
                JButton okButton = new JButton("OK");
                okButton.setActionCommand("OK");
                buttonPane.add(okButton);
                getRootPane().setDefaultButton(okButton);
            }
            {
                JButton cancelButton = new JButton("Cancel");
                cancelButton.setActionCommand("Cancel");
                buttonPane.add(cancelButton);
            }
        }
    }

        public void compile(String name){
        try{
            Runtime ce=Runtime.getRuntime();
            Process proccess =ce.exec("javac "+name);
            InputStream in1=proccess.getErrorStream();
            BufferedInputStream in2=new BufferedInputStream(in1);
            int n;
            boolean bn=true;
            byte error[]=new byte[100];
            for(;(n=in2.read(error,0,100))!=-1;){
                String s=null;
                s=new String(error,0,n);
                textArea.append(s);
                if(s!=null)bn=false;
            }
            if(bn)
                textArea.append("编译正确");
        }
        catch(IOException e2){
            System.out.println(e2.getMessage());
        }
        }
}

运行类

package testWin;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;


import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class RunDialog extends JDialog {

    private final JPanel contentPanel = new JPanel();
    JTextArea textArea = new JTextArea(14,20);
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        try {
            RunDialog dialog = new RunDialog();
            dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
            dialog.setVisible(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Create the dialog.
     */
    public RunDialog() {
        setBounds(100, 100, 686, 448);
        getContentPane().setLayout(new BorderLayout());
        contentPanel.setLayout(new FlowLayout());
        contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
        getContentPane().add(contentPanel, BorderLayout.CENTER);
        {
            JScrollPane scrollPane = new JScrollPane();
            contentPanel.add(scrollPane);
            {
                scrollPane.setViewportView(textArea);
            }
        }
        {
            JPanel buttonPane = new JPanel();
            buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
            getContentPane().add(buttonPane, BorderLayout.SOUTH);
            {
                JButton okButton = new JButton("OK");
                okButton.setActionCommand("OK");
                buttonPane.add(okButton);
                getRootPane().setDefaultButton(okButton);
            }
            {
                JButton cancelButton = new JButton("Cancel");
                cancelButton.setActionCommand("Cancel");
                buttonPane.add(cancelButton);
            }
        }
    }
    public void run(String name){
        try{
            Runtime ce1=Runtime.getRuntime();
            Process proccess=ce1.exec("java "+name);
            InputStream in1=proccess.getInputStream();
            BufferedInputStream in2=new BufferedInputStream(in1);
            byte a[]=new byte[100];
            int n;
            for(;(n=in2.read(a,0,100))!=-1;){
                String s=new String(a,0,n);
                textArea.append(s);
                if(s==null)
                System.out.println("333");
            }
            System.out.println(n);
            System.out.println("444");
        }
        catch(Exception e){
            System.out.println(e.getMessage());
        }
    }
    
}

---

4,和第一个一样，读取数据库来答题，

import java.io.*;
import java.util.Scanner;
import java.sql.*;

public class Test {
    public static void main(String args[]){
        ReadTest test1=new ReadTest();
        test1.setDatabase("Kooing");
        test1.setTable("test");
        int number=test1.getNumber();
        System.out.println("There are "+number+" question what are you want to answer");
        Scanner scanner1=new Scanner(System.in);
        for(;scanner1.hasNextInt();){
            int num=scanner1.nextInt();
            String huiche=scanner1.nextLine();
            test1.setQusetion(num);
            String s=test1.getQusetion();
            System.out.println(s);
            System.out.println("input your answer :");
            String s2=scanner1.nextLine();
//            String huiche=scanner1.nextLine();
            if(s2.equals(test1.getAnswer().trim())){
                System.out.println("right");
            }
            else{
                System.out.println("error");
            }
            System.out.println("There are "+number+" question what are you want to answer");
        }
    }
}

class ReadTest{
    private Connection con;
    private Statement sql;
    private ResultSet rs;
    private String database,table,daan,wenti;
    private int question;
    ReadTest(){
        try{
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        }
        catch(Exception e){
            System.out.println(e.getMessage());
            System.out.println("1111");
        }
    }
    void setDatabase(String a){
        database=a;
        try{
            con=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;DatabaseName="+database,"sa","kenn5666225");
        }
        catch(Exception e2){
            System.out.println(e2.getMessage());
            System.out.println("2222222222");
        }
    }
    void setTable(String a){
        table=a;
        try{
            sql=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
            rs=sql.executeQuery("select *from "+table);
        }
        catch(Exception e3){
            System.out.println(e3.getMessage());
            System.out.println("33333333");
        }
    }
    int getNumber(){
        int n=0;
        try{
            rs.last();
            n=rs.getRow();
        }
        catch(Exception e4){
            System.out.println(e4.getMessage());
            System.out.println("444444444");
        }
        return n;
    }
    void setQusetion(int a){
        question=a;
    }
    String getQusetion(){
        try{
            rs.absolute(question);
            wenti=rs.getString(1)+"
"+rs.getString(2)+"
"+rs.getString(3)+"
"+rs.getString(4)+"
"+rs.getString(5);
        }
        catch(Exception e5){
            System.out.println(e5.getMessage());
            System.out.println("55555555");
        }
        return wenti;
    }
    String getAnswer(){
        try{
            daan=rs.getString(6);
        }
        catch(Exception e6){
            System.out.println(e6.getMessage());
            System.out.println("6666666666");
        }
        return daan;
    }
}