文件输入输出实验代码

1、实 验 报 告课程名称 java程序设计实用教程 实验名称 输入输出文件件处理 实验类型 设计型 实验地点 机房304 实验日期 2012-3-28 指导教师 某某人 专 业 计算机科学与技术 班 级 算机1003 学 号 * 姓 名 * 成 绩 辽宁石油化工大学计算机与通信工程学一实验目的：二实验要求：三、程序代码：代码1：package bao;import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.BufferedR

2、eader;import java.io.DataOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import javax.swing.JFrame;import javax.swing.JButton;import javax.swing.JPanel;import javax.swing.JTextArea;import javax.swing.JTextField;i

3、mport java.io.DataInputStream;public class shiyan12 public static void main(String args) thisplay t=new thisplay();t.setSize(600,400);t.setVisible(true);t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);class thisplay extends JFrameJTextField field,field1;JTextArea display;JButton b1,b2,b3,b4;FileOut

4、putStream fo;FileInputStream fi;DataOutputStream d0;DataInputStream di;JPanel p;public thisplay()b1=new JButton("输入");b2=new JButton("输出");b3=new JButton("输入");b4=new JButton("输出");display=new JTextArea();field=new JTextField(10);field1=new JTextField(10);p=ne

5、w JPanel();Listener l=new Listener();/*p.add(field);p.add(b1);p.add(b2);p.add(field1);p.add(b3);p.add(b4);add(p,BorderLayout.NORTH);add(display);b1.addActionListener(l);b2.addActionListener(l);b3.addActionListener(l);b4.addActionListener(l);class Listener implements ActionListener public void action

6、Performed(ActionEvent e) if(e.getSource()=b1)tryfo=new FileOutputStream("E:file.dat"); d0=new DataOutputStream(fo);d0.writeChars(field.getText();d0.close();catch(IOException ex)System.out.println(ex); if(e.getSource()=b2) try fi=new FileInputStream("E:file.dat"); DataInputStream

7、di= new DataInputStream(fi); display.setText(di.readLine(); di.close(); catch(Exception ex)ex.printStackTrace(); if(e.getSource()=b3) try fo=new FileOutputStream("E:file.dat"); d0=new DataOutputStream(fo); d0.writeChars(field1.getText(); d0.close(); catch(IOException ex)System.out.println(

8、ex); if(e.getSource()=b4) try fi=new FileInputStream("E:file.dat"); /di=new DataInputStream(fi); BufferedReader d =new BufferedReader(new InputStreamReader(fi); display.setText(d.readLine(); catch(IOException ex) System.out.println(ex); 代码2：package baobao;import java.awt.BorderLayout;impor

9、t java.awt.FileDialog;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileReader;import java.io.IOException;import java.io.PrintStream;import javax.swing.JFrame;import j

10、avax.swing.JButton;import javax.swing.JPanel;import javax.swing.JTextArea;import javax.swing.JTextField;import java.io.DataInputStream;public class shiyan public static void main(String args) thisplay t=new thisplay();t.setSize(600,400);t.setVisible(true);t.setDefaultCloseOperation(JFrame.EXIT_ON_CL

11、OSE);class thisplay extends JFrameJTextField field,field1;JTextArea display;JButton b1,b2,b3,b4;FileOutputStream fo;FileInputStream fi;PrintStream d0;DataInputStream di;JPanel p;public thisplay()b1=new JButton("输入");b2=new JButton("输出");b3=new JButton("输入");b4=new JButt

12、on("输出");display=new JTextArea();field=new JTextField(10);field1=new JTextField(10);p=new JPanel();Listener l=new Listener();/*p.add(field);p.add(b1);p.add(b2);p.add(field1);p.add(b3);p.add(b4);add(p,BorderLayout.NORTH);add(display);b1.addActionListener(l);b2.addActionListener(l);b3.addAct

13、ionListener(l);b4.addActionListener(l);public JFrame getContainer()return this;class Listener implements ActionListenerFileDialog fd; public void actionPerformed(ActionEvent e) if(e.getSource()=b1)try fd=new FileDialog(getContainer(),"是否保存？",FileDialog.SAVE); fd.setVisible(true); FileOutpu

14、tStream out=new FileOutputStream(fd.getDirectory()+fd.getFile()+".txt"); String str = field.getText(); out.write(str.getBytes(); out.close(); catch (Exception ess) if(e.getSource()=b2) try fd=new FileDialog(getContainer(),"是否打开？",FileDialog.LOAD); fd.setVisible(true); BufferedRea

15、der in = new BufferedReader(new FileReader(fd.getDirectory() + fd.getFile(); String str = null; while (str = in.readLine() != null) display.append(str + "n"); in.close(); catch (Exception ess) if(e.getSource()=b3) try fd=new FileDialog(getContainer(),"是否保存？",FileDialog.SAVE); fd.

16、setVisible(true); FileOutputStream out=new FileOutputStream(fd.getDirectory()+fd.getFile()+".txt"); String str = field1.getText(); out.write(str.getBytes(); out.close(); catch(IOException ex)System.out.println(ex); if(e.getSource()=b4) try fd=new FileDialog(getContainer(),"是否打开？"

17、,FileDialog.LOAD); fd.setVisible(true); BufferedReader in = new BufferedReader(new FileReader(fd.getDirectory() + fd.getFile(); String str = null; while (str = in.readLine() != null) display.append(str + "n"); in.close(); catch (Exception ess) 代码3：package baoo;import java.awt.BorderLayout;

18、import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintStream;import javax.swing.JFrame;import javax.swing.JBut

19、ton;import javax.swing.JPanel;import javax.swing.JTextArea;import javax.swing.JTextField;import java.io.DataInputStream;public class shiyan public static void main(String args) thisplay t=new thisplay();t.setSize(600,400);t.setVisible(true);t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);class this

20、play extends JFrameJTextField field,field1;JTextArea display;JButton b1,b2,b3,b4;FileOutputStream fo;FileInputStream fi;PrintStream d0;DataInputStream di;JPanel p;public thisplay()b1=new JButton("输入");b2=new JButton("输出");b3=new JButton("输入");b4=new JButton("输出&quo

21、t;);display=new JTextArea();field=new JTextField(10);field1=new JTextField(10);p=new JPanel();Listener l=new Listener();/*p.add(field);p.add(b1);p.add(b2);p.add(field1);p.add(b3);p.add(b4);add(p,BorderLayout.NORTH);add(display);b1.addActionListener(l);b2.addActionListener(l);b3.addActionListener(l);b4.addActionListener(l);class Listener implements ActionListener public void actionPerformed(ActionEvent e) if(e.getSource()=b1)tryfo=new FileOutputStream("E:file.dat"); d0=new PrintStream(fo);d0.