java 文件锁的简单实现
程序员文章站
2023-11-12 19:39:40
java 文件锁的简单实现
 ...
java 文件锁的简单实现
java文件锁的功能,隐私文件及安全性的提升,实现起来不难,这里贴下实现代码:
实例代码:
import java.io.file; import java.io.fileinputstream; import java.io.filenotfoundexception; import java.io.ioexception; import java.io.inputstreamreader; import java.io.randomaccessfile; import java.nio.channels.filechannel; import java.nio.channels.filelock; public class filelocker { public static void main(string[] args) throws ioexception { file f = new file("aaa.txt"); system.out.println(getfilecontent(f) + 1);// no lock filelock lock = getfilelock(f);// lock system.out.println(getfilecontent(f) + 2); lock.release();// lock release system.out.println(getfilecontent(f) + 3);// no lock } /** * get file content. * * @param file * @return */ public static string getfilecontent(file file) { string line = ""; string content = ""; try { bufferedreader bf = new bufferedreader(new inputstreamreader( new fileinputstream(file))); while ((line = bf.readline()) != null) { content += line; } } catch (filenotfoundexception e) { content = "error "; } catch (ioexception e) { content = "error "; } return content; } /** * get lock. * * @param file * @return * @throws ioexception */ public static filelock getfilelock(file file) throws ioexception { randomaccessfile fi = new randomaccessfile(file, "rw"); filechannel fc = fi.getchannel(); return fc.trylock(); } }
感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!