Java文件输入输出流各种类的代码

以下是Java文件输入输出流各种类的代码示例：

1. FileInputStream和FileOutputStream

读取文件内容并写入文件：

import java.io.*;

public class FileCopy {
    public static void main(String[] args) {
        try {
            FileInputStream input = new FileInputStream("input.txt");
            FileOutputStream output = new FileOutputStream("output.txt");

            int data;
            while ((data = input.read()) != -1) {
                output.write(data);
            }

            input.close();
            output.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2. FileReader和FileWriter

读取文本文件内容并写入文本文件：

import java.io.*;

public class FileCopy {
    public static void main(String[] args) {
        try {
            FileReader reader = new FileReader("input.txt");
            FileWriter writer = new FileWriter("output.txt");

            int data;
            while ((data = reader.read()) != -1) {
                writer.write(data);
            }

            reader.close();
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

3. BufferedInputStream和BufferedOutputStream

使用缓冲区读取文件内容并写入文件：

import java.io.*;

public class FileCopy {
    public static void main(String[] args) {
        try {
            FileInputStream input = new FileInputStream("input.txt");
            FileOutputStream output = new FileOutputStream("output.txt");
            BufferedInputStream bufferedInput = new BufferedInputStream(input);
            BufferedOutputStream bufferedOutput = new BufferedOutputStream(output);

            int data;
            while ((data = bufferedInput.read()) != -1) {
                bufferedOutput.write(data);
            }

            bufferedInput.close();
            bufferedOutput.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

4. BufferedReader和BufferedWriter

使用缓冲区读取文本文件内容并写入文本文件：

import java.io.*;

public class FileCopy {
    public static void main(String[] args) {
        try {
            FileReader reader = new FileReader("input.txt");
            FileWriter writer = new FileWriter("output.txt");
            BufferedReader bufferedReader = new BufferedReader(reader);
            BufferedWriter bufferedWriter = new BufferedWriter(writer);

            String line;
            while ((line = bufferedReader.readLine()) != null) {
                bufferedWriter.write(line);
                bufferedWriter.newLine();
            }

            bufferedReader.close();
            bufferedWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}