深入浅出Java中的字节流和字符流详解

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class ByteStreamExample {
    public static void main(String[] args) {
        String sourceFile = "source.txt"; // 源文件路径
        String destinationFile = "destination.txt"; // 目标文件路径
        try (FileInputStream fis = new FileInputStream(sourceFile);
             FileOutputStream fos = new FileOutputStream(destinationFile)) {
            byte[] buffer = new byte[1024]; // 每次读取1KB的数据
            int bytesRead;
            while ((bytesRead = fis.read(buffer)) != -1) {
                fos.write(buffer, 0, bytesRead);
            }
            System.out.println("文件复制成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class CharStreamExample {
    public static void main(String[] args) {
        String sourceFile = "source.txt"; // 源文件路径
        String destinationFile = "destination.txt"; // 目标文件路径
        try (FileReader fr = new FileReader(sourceFile);
             FileWriter fw = new FileWriter(destinationFile)) {
            char[] buffer = new char[1024]; // 每次读取1KB的字符
            int charsRead;
            while ((charsRead = fr.read(buffer)) != -1) {
                fw.write(buffer, 0, charsRead);
            }
            System.out.println("文件复制成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class BufferedReaderExample {
    public static void main(String[] args) {
        String filePath = "source.txt";
        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            String line;
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
public class BufferedWriterExample {
    public static void main(String[] args) {
        String filePath = "output.txt";
        try (BufferedWriter bw = new BufferedWriter(new FileWriter(filePath))) {
            bw.write("这是第一行内容");
            bw.newLine();
            bw.write("这是第二行内容");
            System.out.println("内容写入成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}