1. 高效文件读取 使用BufferedReader/BufferedWriter提高读写效率:BufferedReader和BufferedWriter是高效的字符流,能够一次读取或写入一行文本,比直接使用InputStream或O
1. 高效文件读取
BufferedReader reader = new BufferedReader(new FileReader("file.txt"));
BufferedWriter writer = new BufferedWriter(new FileWriter("file.txt"));
byte[] bytes = Files.readAllBytes(Paths.get("file.txt"));
Files.writeAllBytes(Paths.get("file.txt"), bytes);
2. 高效文件写入
List<String> lines = Arrays.asList("line1", "line2");
Files.write(Paths.get("file.txt"), lines);
PrintWriter writer = new PrintWriter("file.txt");
writer.println("line1");
writer.println("line2");
writer.close();
3. 高效文件复制
Files.copy(Paths.get("file1.txt"), Paths.get("file2.txt"));
FileChannel inChannel = FileChannel.open(Paths.get("file1.txt"), StandardOpenOption.READ);
FileChannel outChannel = FileChannel.open(Paths.get("file2.txt"), StandardOpenOption.WRITE);
inChannel.transferTo(0, inChannel.size(), outChannel);
4. 高效文件移动
Files.move(Paths.get("file1.txt"), Paths.get("file2.txt"));
File file1 = new File("file1.txt");
File file2 = new File("file2.txt");
file1.renameTo(file2);
5. 高效文件删除
Files.delete(Paths.get("file.txt"));
File file = new File("file.txt");
file.delete();
6. 文件元数据管理
Map<String, Object> attrs = Files.getAttribute(Paths.get("file.txt"), "*");
Files.setAttribute(Paths.get("file.txt"), "creationTime", new PosixFileAttributes.CreationTimeImpl());
7. 文件锁
FileChannel channel = FileChannel.open(Paths.get("file.txt"), StandardOpenOption.WRITE);
FileLock lock = channel.lock();
lock.release();
总结:
本文介绍了多种Java文件操作高级技巧,包括文件读取、写入、复制、移动和删除操作,以及文件元数据管理和文件锁。掌握这些技巧可以显著提高Java开发效率,并为编写健壮可靠的应用程序打下坚实基础。
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本文标题: Java 文件操作高级技巧:提升开发效率
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