Java作业3

文本文件复制import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class TextCopy {public static void main(String[] args) {String srcPath source.txt;String destPath target.txt;try {File sourceFile new File(srcPath);if (!sourceFile.exists()) {sourceFile.createNewFile(); // 自动创建文件FileWriter fw new FileWriter(sourceFile);fw.write(这是自动创建的源文件内容\n);fw.write(文件复制测试成功\n);fw.close();System.out.println(已自动创建 source.txt);}} catch (IOException e) {System.out.println(创建文件失败);e.printStackTrace();}try (BufferedReader br new BufferedReader(new FileReader(srcPath));BufferedWriter bw new BufferedWriter(new FileWriter(destPath))) {String line;while ((line br.readLine()) ! null) {bw.write(line);bw.newLine();}System.out.println(文本文件复制完成);} catch (IOException e) {System.out.println(运行失败);e.printStackTrace();}}}任意文件复制import java.io.*;public class AnyFileCopy {public static void main(String[] args) {String srcPath test.txt; // 自动创建的测试文件String destPath copy_test.txt; // 复制后的文件try {File sourceFile new File(srcPath);if (!sourceFile.exists()) {sourceFile.createNewFile();FileWriter fw new FileWriter(sourceFile);fw.write(我是自动创建的测试内容\n);fw.write(文件复制成功);fw.close();System.out.println(已自动创建源文件 srcPath);}try (BufferedInputStream bis new BufferedInputStream(new FileInputStream(srcPath));BufferedOutputStream bos new BufferedOutputStream(new FileOutputStream(destPath))) {byte[] buffer new byte[8192];int len;while ((len bis.read(buffer)) ! -1) {bos.write(buffer, 0, len);}bos.flush();System.out.println(文件复制完成);System.out.println(源文件 srcPath);System.out.println(目标文件 destPath);}} catch (IOException e) {System.out.println(复制失败);e.printStackTrace();}}}