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("\u83DC\u5355");

        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("\n"+"name :"+name);

                    textArea.append("\t"+in.readUTF());

                    textArea.append("\t"+in.readUTF());

                    textArea.append("\n----------------------------------------------------------------------------");

                    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("\u8F93\u5165\u59D3\u540D");

        box1.add(lblNewLabel);

        lblNewLabel_1 = new JLabel("\u8F93\u5165qq");

        box1.add(lblNewLabel_1);

        lblNewLabel_2 = new JLabel("\u8F93\u5165\u7535\u8BDD");

        box1.add(lblNewLabel_2);

        lblNewLabel_3 = new JLabel("\u5355\u51FB\u5F55\u5165");

        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("\u5F55\u5165");

        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("\u7528\u8BB0\u4E8B\u672C\u7F16\u8F91\u6E90\u6587\u4EF6");

    JButton button2 = new JButton("\u7F16\u8BD1");

    JButton button3 = new JButton("\u8FD0\u884C");

    /**

     * 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("   \u8F93\u5165\u6587\u4EF6\u540D \uFF1A");

        contentPane.add(label);

        text1 = new JTextField();

        contentPane.add(text1);

        text1.setColumns(15);

        contentPane.add(button2);

        JLabel label_1 = new JLabel("   \u8F93\u5165\u4E3B\u7C7B\u540D\uFF1A");

        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)+"\n"+rs.getString(2)+"\n"+rs.getString(3)+"\n"+rs.getString(4)+"\n"+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;

    }

}

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IO流+数据库课后习题

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