Java可视化之实现文本的加密和解密-APISpace

Java可视化之实现文本的加密和解密

一、题目

编写一个java程序，实现一个文本信息的加密。

二、要求

可视化界面，友好的输入和输出，文件的存取。

三、分析

所谓数据加密（Data Encryption）技术是指将一个信息（或称明文，plain text）经过加密钥匙（Encryption key）及加密函数转换，变成无意义的密文（cipher text），而接收方则将此密文经过解密函数、解密钥匙（Decryption key）还原成明文。

四、界面规划

登录验证界面

建立基本框架，基于Swing中Frame

各组件的属性

组件编号/类型

名称/属性

1 /JLabel

lblNewLabel/用户名

2/JPasswordField

passwordField/

3 /JButton

btnNewButton/确定

4 /JTextField

textField/

5 /JPasswordField

passwordField/

6 /JButton

btnNewButton_1/退出

（左边一列从上到下依次为1-2，右边一列从上到下依次为3-5）

五、功能实现

5.1 确定功能实现

当use_name和password都正确时，跳转到下一界面，否则按下正确按钮时，将输入的字符串重置为空。

String use_name=textField.getText();

String password;

password=String.valueOf(passwordField.getPassword());

if(use_name.equals("DJC期待")&&password.equals("1234")) {

SignUp.this.setVisible(false);

Jia_mi d=new Jia_mi();//加密和解密类

d.setVisible(true);

}

else {

String nl="";

textField.setText(nl);

passwordField.setText(nl);

}

5.2 退出功能实现

正常退出，程序正常执行结束退出

System.exit(0);

建立基本框架，基于Swing中Frame

各组件的属性

组件编号/类型

名称/属性

1 /JButton

btnNewButton_2/<<翻译

2/JTextArea

textArea/

3 /JButton

btnNewButton_1/打开密文

4/JTextArea

textArea_1/

5 /JButton

btnNewButton/保存文本

（左边一列从上到下依次为1-2，右边一列从上到下依次为3-5）

多行文本输入框的功能与单行文本输入框的功能相同，只是它能显示更多的文字。因为单行文本输入框只能输入一行的文字，所以需要输入和显示较多的文字时，就要用到多行文本输入框。多行文本输入框是由 JTextArea 类实现的。

5.3 加密文本的产生

在caretUpdate()函数中，先取到用户输入的字符然后依次将这些字符转为Unicode编码加999重新以字符的编码赋值输出，显示在右边Jtextarea中。

String str1=textArea.getText();

String str2="";

char c;

for(int i=0;i

c=str1.charAt(i);

c=(char)(c+999);

str2+=c;

}

textArea_1.setText(str2);

5.4 密码文件的保存

JFileChooser jfchooser=new JFileChooser();

if(jfchooser.showSaveDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=jfchooser.getSelectedFile();

try {

FileWriter fw=new FileWriter(f);

String str=textArea_1.getText();

fw.write(str);

fw.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

5.5 密码文件的解密

public void actionPerformed(ActionEvent e) {

JFileChooser fchooser=new JFileChooser();

if(fchooser.showOpenDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=fchooser.getSelectedFile();

try {

FileReader fr=new FileReader(f);

try {

int n=fr.read();

String str="";

char c;

while(n!=-1) {

c=(char)n;

str+=c;

n=fr.read();

}

textArea_1.setText(str);

fr.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

catch(FileNotFoundException e1) {

e1.printStackTrace();

}

5.6 <<翻译

加密过程的反过程。

String str2=textArea_1.getText();

String str1="";

for(int i=0;i

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

六、功能测试

账号和密码不同时为对时，账号框和密码框重置。

密码和账号同时为对时，进入加密和解密界面。

文本与加密文本的转换。

保存的文件。

打开密文方法与以上相同。

将密文（Unicode编码）转换明文。

将程序导出为一个可执行的Java软件

桌面可执行软件。

步骤：File-Export-选择main函数所在类-选择导出的位置。

七、程序源码

7.1 SignUp.java

package 文本信息的加密与解密;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import java.awt.Frame;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.JButton;

import java.awt.event.ActionListener;

importhttp:// java.awt.event.ActionEvent;

import javax.swing.JPasswordField;

public class SignUp extends JFrame {

private JPanel contentPane;

private JTextField textField;

private JPasswordField passwordField;

/**

* Launch the application.

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

SignUp frame = new SignUp();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

});

}

/**

* Create the frame.

public SignUp() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 450, 300);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JLabel lblNewLabel = new JLabel("\u7528\u6237\u540D");

lblNewLabel.setBounds(34, 27, 69, 26);

contentPane.add(lblNewLabel);

JLabel lblNewLabel_1 = new JLabel("\u5BC6\u7801");

lblNewLabel_1.setBounds(34, 104, 69, 26);

contentPane.add(lblNewLabel_1);

textField = new JTextField();

textField.setBounds(153, 30, 164, 35);

contentPane.add(textField);

textField.setColumns(10);

JButton btnNewButton = new JButton("\u786E\u5B9A");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String use_name=textField.getText();

String password;

password=String.valueOf(passwordField.getPassword());

if(use_name.equals("DJC期待")&&password.equals("1234")) {

SignUp.this.setVisible(false);

Jia_mi d=new Jia_mi();

d.setVisible(true);

}

else {

String nl="";

textField.setText(nl);

passwordField.setText(nl);

}

});

btnNewButton.setBounds(53, 194, 93, 23);

contentPane.add(btnNewButton);

JButton btnNewButton_1 = new JButton("\u9000\u51FA");

btnNewButton_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

});

btnNewButton_1.setBounds(234, 194, 93, 23);

contentPane.add(btnNewButton_1);

passwordField = new JPasswordField();

passwordField.setBounds(153, 104, 164, 24);

contentPane.add(passwordField);

}

7.2 Jia_mi.java

package 文本信息的加密与解密;

import java.awt.EventQueue;

import java.awt.Frame;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import java.awt.event.ActionListener;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.awt.event.ActionEvent;

import javax.swing.JTextArea;

import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.event.CaretListener;

import javax.swing.event.CaretEvent;

public class Jia_mi extends JFrame {

private JPanel contentPane;

/**

* Launch the application.

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

Jia_mi frame = new Jia_mi();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

});

}

/**

* Create the frame.

public Jia_mi() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 630, 404);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JTextArea textArea_1 = new JTextArea();

textArea_1.setWrapStyleWord(true);

textArea_1.setLineWrap(true);

textArea_1.setBounds(356, 97, 187, 164);

contentPane.add(textArea_1);

JTextArea textArea = new JTextArea();

textArea.setWrapStyleWord(true);

textArea.setLineWrap(true);

textArea.addCaretListener(new CaretListener() {

public void caretUpdate(CaretEvent arg0) {

String str1=textArea.getText();

String str2="";

char c;

for(int i=0;i

c=str1.charAt(i);

c=(char)(c+999);

str2+=c;

}

textArea_1.setText(str2);

}

});

textArea.setBounds(35, 97, 187, 164);

contentPane.add(textArea);

JButton btnNewButton = new JButton("\u4FDD\u5B58\u6587\u672C");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser jfchooser=new JFileChooser();

if(jfchooser.showSaveDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=jfchooser.getSelectedFile();

try {

FileWriter fw=new FileWriter(f);

String str=textArea_1.getText();

fw.write(str);

fw.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

});

btnNewButton.setBounds(360, 303, 93, 23);

contentPane.add(btnNewButton);

JButton btnNewButton_1 = new JButton("\u6253\u5F00\u5BC6\u6587");

btnNewButton_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser fchooser=new JFileChooser();

if(fchooser.showOpenDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=fchooser.getSelectedFile();

try {

FileReader fr=new FileReader(f);

try {

int n=fr.read();

String str="";

char c;

while(n!=-1) {

c=(char)n;

str+=c;

n=fr.read();

}

textArea_1.setText(str);

fr.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

catch(FileNotFoundException e1) {

e1.printStackTrace();

}

});

btnNewButton_1.setBounds(397, 31, 93, 23);

contentPane.add(btnNewButton_1);

JButton btnNewButton_2 = new JButton("<<\u7FFB\u8BD1");

btnNewButton_2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String str2=textArea_1.getText();

String str1="";

for(int i=0;i

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

});

btnNewButton_2.setBounds(129, 31, 93, 23);

contentPane.add(btnNewButton_2);

}

public Jia_mi(Frame f) {

// TODO 自动生成的构造函数存根

}

c=str1.charAt(i);

c=(char)(c+999);

str2+=c;

}

textArea_1.setText(str2);

5.4 密码文件的保存

JFileChooser jfchooser=new JFileChooser();

if(jfchooser.showSaveDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=jfchooser.getSelectedFile();

try {

FileWriter fw=new FileWriter(f);

String str=textArea_1.getText();

fw.write(str);

fw.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

5.5 密码文件的解密

public void actionPerformed(ActionEvent e) {

JFileChooser fchooser=new JFileChooser();

if(fchooser.showOpenDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=fchooser.getSelectedFile();

try {

FileReader fr=new FileReader(f);

try {

int n=fr.read();

String str="";

char c;

while(n!=-1) {

c=(char)n;

str+=c;

n=fr.read();

}

textArea_1.setText(str);

fr.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

catch(FileNotFoundException e1) {

e1.printStackTrace();

}

5.6 <<翻译

加密过程的反过程。

String str2=textArea_1.getText();

String str1="";

for(int i=0;i

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

六、功能测试

账号和密码不同时为对时，账号框和密码框重置。

密码和账号同时为对时，进入加密和解密界面。

文本与加密文本的转换。

保存的文件。

打开密文方法与以上相同。

将密文（Unicode编码）转换明文。

将程序导出为一个可执行的Java软件

桌面可执行软件。

步骤：File-Export-选择main函数所在类-选择导出的位置。

七、程序源码

7.1 SignUp.java

package 文本信息的加密与解密;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import java.awt.Frame;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.JButton;

import java.awt.event.ActionListener;

importhttp:// java.awt.event.ActionEvent;

import javax.swing.JPasswordField;

public class SignUp extends JFrame {

private JPanel contentPane;

private JTextField textField;

private JPasswordField passwordField;

/**

* Launch the application.

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

SignUp frame = new SignUp();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

});

}

/**

* Create the frame.

public SignUp() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 450, 300);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JLabel lblNewLabel = new JLabel("\u7528\u6237\u540D");

lblNewLabel.setBounds(34, 27, 69, 26);

contentPane.add(lblNewLabel);

JLabel lblNewLabel_1 = new JLabel("\u5BC6\u7801");

lblNewLabel_1.setBounds(34, 104, 69, 26);

contentPane.add(lblNewLabel_1);

textField = new JTextField();

textField.setBounds(153, 30, 164, 35);

contentPane.add(textField);

textField.setColumns(10);

JButton btnNewButton = new JButton("\u786E\u5B9A");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String use_name=textField.getText();

String password;

password=String.valueOf(passwordField.getPassword());

if(use_name.equals("DJC期待")&&password.equals("1234")) {

SignUp.this.setVisible(false);

Jia_mi d=new Jia_mi();

d.setVisible(true);

}

else {

String nl="";

textField.setText(nl);

passwordField.setText(nl);

}

});

btnNewButton.setBounds(53, 194, 93, 23);

contentPane.add(btnNewButton);

JButton btnNewButton_1 = new JButton("\u9000\u51FA");

btnNewButton_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

});

btnNewButton_1.setBounds(234, 194, 93, 23);

contentPane.add(btnNewButton_1);

passwordField = new JPasswordField();

passwordField.setBounds(153, 104, 164, 24);

contentPane.add(passwordField);

}

7.2 Jia_mi.java

package 文本信息的加密与解密;

import java.awt.EventQueue;

import java.awt.Frame;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import java.awt.event.ActionListener;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.awt.event.ActionEvent;

import javax.swing.JTextArea;

import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.event.CaretListener;

import javax.swing.event.CaretEvent;

public class Jia_mi extends JFrame {

private JPanel contentPane;

/**

* Launch the application.

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

Jia_mi frame = new Jia_mi();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

});

}

/**

* Create the frame.

public Jia_mi() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 630, 404);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JTextArea textArea_1 = new JTextArea();

textArea_1.setWrapStyleWord(true);

textArea_1.setLineWrap(true);

textArea_1.setBounds(356, 97, 187, 164);

contentPane.add(textArea_1);

JTextArea textArea = new JTextArea();

textArea.setWrapStyleWord(true);

textArea.setLineWrap(true);

textArea.addCaretListener(new CaretListener() {

public void caretUpdate(CaretEvent arg0) {

String str1=textArea.getText();

String str2="";

char c;

for(int i=0;i

c=str1.charAt(i);

c=(char)(c+999);

str2+=c;

}

textArea_1.setText(str2);

}

});

textArea.setBounds(35, 97, 187, 164);

contentPane.add(textArea);

JButton btnNewButton = new JButton("\u4FDD\u5B58\u6587\u672C");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser jfchooser=new JFileChooser();

if(jfchooser.showSaveDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=jfchooser.getSelectedFile();

try {

FileWriter fw=new FileWriter(f);

String str=textArea_1.getText();

fw.write(str);

fw.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

});

btnNewButton.setBounds(360, 303, 93, 23);

contentPane.add(btnNewButton);

JButton btnNewButton_1 = new JButton("\u6253\u5F00\u5BC6\u6587");

btnNewButton_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser fchooser=new JFileChooser();

if(fchooser.showOpenDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=fchooser.getSelectedFile();

try {

FileReader fr=new FileReader(f);

try {

int n=fr.read();

String str="";

char c;

while(n!=-1) {

c=(char)n;

str+=c;

n=fr.read();

}

textArea_1.setText(str);

fr.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

catch(FileNotFoundException e1) {

e1.printStackTrace();

}

});

btnNewButton_1.setBounds(397, 31, 93, 23);

contentPane.add(btnNewButton_1);

JButton btnNewButton_2 = new JButton("<<\u7FFB\u8BD1");

btnNewButton_2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String str2=textArea_1.getText();

String str1="";

for(int i=0;i

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

});

btnNewButton_2.setBounds(129, 31, 93, 23);

contentPane.add(btnNewButton_2);

}

public Jia_mi(Frame f) {

// TODO 自动生成的构造函数存根

}

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

六、功能测试

账号和密码不同时为对时，账号框和密码框重置。

密码和账号同时为对时，进入加密和解密界面。

文本与加密文本的转换。

保存的文件。

打开密文方法与以上相同。

将密文（Unicode编码）转换明文。

将程序导出为一个可执行的Java软件

桌面可执行软件。

步骤：File-Export-选择main函数所在类-选择导出的位置。

七、程序源码

7.1 SignUp.java

package 文本信息的加密与解密;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import java.awt.Frame;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.JButton;

import java.awt.event.ActionListener;

importhttp:// java.awt.event.ActionEvent;

import javax.swing.JPasswordField;

public class SignUp extends JFrame {

private JPanel contentPane;

private JTextField textField;

private JPasswordField passwordField;

/**

* Launch the application.

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

SignUp frame = new SignUp();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

});

}

/**

* Create the frame.

public SignUp() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 450, 300);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JLabel lblNewLabel = new JLabel("\u7528\u6237\u540D");

lblNewLabel.setBounds(34, 27, 69, 26);

contentPane.add(lblNewLabel);

JLabel lblNewLabel_1 = new JLabel("\u5BC6\u7801");

lblNewLabel_1.setBounds(34, 104, 69, 26);

contentPane.add(lblNewLabel_1);

textField = new JTextField();

textField.setBounds(153, 30, 164, 35);

contentPane.add(textField);

textField.setColumns(10);

JButton btnNewButton = new JButton("\u786E\u5B9A");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String use_name=textField.getText();

String password;

password=String.valueOf(passwordField.getPassword());

if(use_name.equals("DJC期待")&&password.equals("1234")) {

SignUp.this.setVisible(false);

Jia_mi d=new Jia_mi();

d.setVisible(true);

}

else {

String nl="";

textField.setText(nl);

passwordField.setText(nl);

}

});

btnNewButton.setBounds(53, 194, 93, 23);

contentPane.add(btnNewButton);

JButton btnNewButton_1 = new JButton("\u9000\u51FA");

btnNewButton_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

});

btnNewButton_1.setBounds(234, 194, 93, 23);

contentPane.add(btnNewButton_1);

passwordField = new JPasswordField();

passwordField.setBounds(153, 104, 164, 24);

contentPane.add(passwordField);

}

7.2 Jia_mi.java

package 文本信息的加密与解密;

import java.awt.EventQueue;

import java.awt.Frame;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import java.awt.event.ActionListener;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.awt.event.ActionEvent;

import javax.swing.JTextArea;

import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.event.CaretListener;

import javax.swing.event.CaretEvent;

public class Jia_mi extends JFrame {

private JPanel contentPane;

/**

* Launch the application.

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

Jia_mi frame = new Jia_mi();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

});

}

/**

* Create the frame.

public Jia_mi() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 630, 404);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JTextArea textArea_1 = new JTextArea();

textArea_1.setWrapStyleWord(true);

textArea_1.setLineWrap(true);

textArea_1.setBounds(356, 97, 187, 164);

contentPane.add(textArea_1);

JTextArea textArea = new JTextArea();

textArea.setWrapStyleWord(true);

textArea.setLineWrap(true);

textArea.addCaretListener(new CaretListener() {

public void caretUpdate(CaretEvent arg0) {

String str1=textArea.getText();

String str2="";

char c;

for(int i=0;i

c=str1.charAt(i);

c=(char)(c+999);

str2+=c;

}

textArea_1.setText(str2);

}

});

textArea.setBounds(35, 97, 187, 164);

contentPane.add(textArea);

JButton btnNewButton = new JButton("\u4FDD\u5B58\u6587\u672C");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser jfchooser=new JFileChooser();

if(jfchooser.showSaveDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=jfchooser.getSelectedFile();

try {

FileWriter fw=new FileWriter(f);

String str=textArea_1.getText();

fw.write(str);

fw.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

});

btnNewButton.setBounds(360, 303, 93, 23);

contentPane.add(btnNewButton);

JButton btnNewButton_1 = new JButton("\u6253\u5F00\u5BC6\u6587");

btnNewButton_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser fchooser=new JFileChooser();

if(fchooser.showOpenDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=fchooser.getSelectedFile();

try {

FileReader fr=new FileReader(f);

try {

int n=fr.read();

String str="";

char c;

while(n!=-1) {

c=(char)n;

str+=c;

n=fr.read();

}

textArea_1.setText(str);

fr.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

catch(FileNotFoundException e1) {

e1.printStackTrace();

}

});

btnNewButton_1.setBounds(397, 31, 93, 23);

contentPane.add(btnNewButton_1);

JButton btnNewButton_2 = new JButton("<<\u7FFB\u8BD1");

btnNewButton_2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String str2=textArea_1.getText();

String str1="";

for(int i=0;i

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

});

btnNewButton_2.setBounds(129, 31, 93, 23);

contentPane.add(btnNewButton_2);

}

public Jia_mi(Frame f) {

// TODO 自动生成的构造函数存根

}

c=str1.charAt(i);

c=(char)(c+999);

str2+=c;

}

textArea_1.setText(str2);

}

});

textArea.setBounds(35, 97, 187, 164);

contentPane.add(textArea);

JButton btnNewButton = new JButton("\u4FDD\u5B58\u6587\u672C");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser jfchooser=new JFileChooser();

if(jfchooser.showSaveDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=jfchooser.getSelectedFile();

try {

FileWriter fw=new FileWriter(f);

String str=textArea_1.getText();

fw.write(str);

fw.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

});

btnNewButton.setBounds(360, 303, 93, 23);

contentPane.add(btnNewButton);

JButton btnNewButton_1 = new JButton("\u6253\u5F00\u5BC6\u6587");

btnNewButton_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JFileChooser fchooser=new JFileChooser();

if(fchooser.showOpenDialog(null)==

JFileChooser.APPROVE_OPTION) {

File f=fchooser.getSelectedFile();

try {

FileReader fr=new FileReader(f);

try {

int n=fr.read();

String str="";

char c;

while(n!=-1) {

c=(char)n;

str+=c;

n=fr.read();

}

textArea_1.setText(str);

fr.close();

}

catch(IOException e1) {

e1.printStackTrace();

}

catch(FileNotFoundException e1) {

e1.printStackTrace();

}

});

btnNewButton_1.setBounds(397, 31, 93, 23);

contentPane.add(btnNewButton_1);

JButton btnNewButton_2 = new JButton("<<\u7FFB\u8BD1");

btnNewButton_2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String str2=textArea_1.getText();

String str1="";

for(int i=0;i

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

});

btnNewButton_2.setBounds(129, 31, 93, 23);

contentPane.add(btnNewButton_2);

}

public Jia_mi(Frame f) {

// TODO 自动生成的构造函数存根

}

char c=str2.charAt(i);

c=(char)(c-999);

str1+=c;

}

textArea.setText(str1);

}

});

btnNewButton_2.setBounds(129, 31, 93, 23);

contentPane.add(btnNewButton_2);

}

public Jia_mi(Frame f) {

// TODO 自动生成的构造函数存根

}

python怎么过滤字符串中的英文字母

296 2023-01-18

Java可视化之实现文本的加密和解密

c语言sscanf函数的用法是什么

r语言清空数组的方法是什么

python怎么过滤字符串中的英文字母

推荐文章

api接口有哪几种分类及功能

什么是API接口?API接口简单介绍

短信API接口概述，短信API接口的优势

7款快递物流的物流查询API工具，物流快递查询API接口怎么对接？

企业四要素: 了解企业经营成功的关键

什么是语音验证码?,语音验证码平台有哪些

全国工商查询系统怎么查企业名录

哪些平台提供实名认证的接口？

PHP如何调用API接口?

如何使用百度天气预报API接口?

最近发表

热评文章

数据接口api（数据接口API开发平台）

数据开放接口api（数据服务api开发）

Python爬虫教程：爬取酷狗音乐（python爬取

hbuilder怎么更改字体大小和颜色

直播平台api接口 - 构建卓越的直播平台

实时股票数据api接口（股票实时行情api接口）