增量更新项目时的备份MyBak

在增量更新项目时，做好备份十分重要，这里提供一个方法备份java Web所更新的文件。

把更新包放在指定目录，配好如下webappFolder、updateFolder以及bakeupFolder的路径。

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.text.SimpleDateFormat;
import java.util.Date;public class MyBak
{private static StringBuffer globalTxtMessage = new StringBuffer("");private static StringBuffer stdoutMessage = new StringBuffer("");private static int totalFileNumber = 0;private static int totalSuccessCopyNumber = 0;private static int totalNewFileNumber = 0;public static void main(String[] args){String today = new SimpleDateFormat("yyyy-MM-dd").format(new Date());String webappFolder = "/www/htdocs/webapps/M4";String updateFolder = "/home/whaty/bakeForUpdate/update/" + today;String backupFolder = "/home/whaty/bakeForUpdate/bake/" + today;if (webappFolder.equals(backupFolder)) {stdoutMessage.append("you can't just copy thins to the webapps folder!\n");globalTxtMessage = new StringBuffer("");stdoutMessage = new StringBuffer("");} else {String msg = backupFiles(updateFolder, webappFolder, backupFolder);System.out.print(msg);globalTxtMessage = new StringBuffer("");stdoutMessage = new StringBuffer("");}}public static String backupFiles(String _updateFolder, String _webappFolder, String _backupFolder){String today = new SimpleDateFormat("yyyy-MM-dd").format(new Date());String now = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date());try {File updateFolder = new File(_updateFolder);File webappFolder = new File(_webappFolder);File backupFolder = new File(_backupFolder);globalTxtMessage.append("============" + now + "Backup Log==========\n");globalTxtMessage.append("============初始化条件测试开始===============\n");stdoutMessage.append("============init test start===============\n");if (!(updateFolder.exists())) {globalTxtMessage.append(_updateFolder + "更新包文件夹找不到!\n");stdoutMessage.append(" the upload folder \"" + _updateFolder + "\" can Not found! \n please make sure you have upload the folder!!!!\n");}if (!(webappFolder.exists())) {globalTxtMessage.append("项目Webapp文件夹" + _webappFolder + "找不到!\n");stdoutMessage.append("the Webapp folder " + _webappFolder + " can Not found!!!\n please make sure the folder is exists!!!!\n");return stdoutMessage.toString();}if (!(backupFolder.exists())) {globalTxtMessage.append("自动创建备份文件夹" + backupFolder.getAbsolutePath() + "\n");stdoutMessage.append("auto create folder " + backupFolder.getAbsolutePath() + "\n");backupFolder.mkdirs();}globalTxtMessage.append("============初始化条件测试结束===============\n");stdoutMessage.append("============init  test end===============\n");Long start = Long.valueOf(System.currentTimeMillis());copyFilesToDirectory(updateFolder, webappFolder, backupFolder);Long end = Long.valueOf(System.currentTimeMillis());Long oprationMillisTime = Long.valueOf(end.longValue() - start.longValue());Long oprationSecondTime = Long.valueOf((end.longValue() - start.longValue()) / 1000L);globalTxtMessage.append("备份完成!\n");globalTxtMessage.append("=========================================\n");globalTxtMessage.append("总文件数:" + totalFileNumber + "\n");globalTxtMessage.append("成功复制:" + totalSuccessCopyNumber + "\n");globalTxtMessage.append("新增文件数:" + totalNewFileNumber + "\n");globalTxtMessage.append("拷贝文件所需时间[oprationMillisTime]:" + oprationMillisTime + " 毫秒\n");globalTxtMessage.append("拷贝文件所需时间[oprationSecondTime]:" + oprationSecondTime + " 秒\n");stdoutMessage.append("backup done!\n");stdoutMessage.append("total files number:" + totalFileNumber + "\n");stdoutMessage.append("success copies number:" + totalSuccessCopyNumber + "\n");stdoutMessage.append("new files number:" + totalNewFileNumber + "\n");stdoutMessage.append("copy files time[oprationMillisTime]:" + oprationMillisTime + " MillisTime...\n");stdoutMessage.append("copy files time[oprationSecondTime]:" + oprationSecondTime + " sencends...\n");stdoutMessage.append("check more info in this file:" + _backupFolder + "/" + today + "_bak" + "/backupLog.txt\n");File logFile=new File(_backupFolder + "/backupLog.txt");logFile.createNewFile();FileWriter fw = new FileWriter(logFile);BufferedWriter bw = new BufferedWriter(fw);bw.write(globalTxtMessage.toString());bw.flush();bw.close();}catch (Exception e){globalTxtMessage.append("============The main function Exception...==============\n");e.printStackTrace();}return stdoutMessage.toString();}public static void copyFilesToDirectory(File _updateFolder, File _webappFolder, File _backupFolder) {String today = new SimpleDateFormat("yyyy-MM-dd").format(new Date());try {if (!(_updateFolder.isDirectory())) {File srcFile = new File(_webappFolder.getAbsolutePath() + _updateFolder.getPath().split(today)[1]);System.out.println(_webappFolder.getAbsolutePath() + _updateFolder.getPath().split(today)[1]);totalFileNumber += 1;if (!(srcFile.exists())) {totalNewFileNumber += 1;globalTxtMessage.append("文件:" + srcFile.getPath() + " 在原webapp文件文件夹中不存在,请确认这是个新添加的文件 \n"); return;}File destFile = new File(_backupFolder.getAbsolutePath() + _updateFolder.getPath().split(today)[1]);copyFile(srcFile.getAbsolutePath(), destFile.getAbsolutePath());totalSuccessCopyNumber += 1; return;}File[] files = _updateFolder.listFiles();for (int i = 0; i < files.length; ++i){copyFilesToDirectory(files[i], _webappFolder, _backupFolder);}}catch (Exception e) {globalTxtMessage.append("复制文件出错! \n");e.printStackTrace();}}public static void copyFile(String oldPath, String newPath){int bytesum = 0;int byteread = 0;File oldfile = new File(oldPath);File newfile = new File(newPath);if (!(newfile.getParentFile().exists())) {newfile.getParentFile().mkdirs();}if (oldfile.exists()) {InputStream inStream = null;FileOutputStream fs = null;try {inStream = new FileInputStream(oldPath);fs = new FileOutputStream(newPath);byte[] buffer = new byte[1444];while ((byteread = inStream.read(buffer)) != -1) {bytesum += byteread;fs.write(buffer, 0, byteread);}}catch (FileNotFoundException e) {globalTxtMessage.append("复制文件:" + oldfile.getName() + " 时找不到文件! \n");e.printStackTrace();}catch (IOException e){globalTxtMessage.append("复制文件:" + oldfile.getName() + " 时出错! \n");e.printStackTrace();} finally {try {if (inStream != null)inStream.close();if (fs != null)fs.close();} catch (IOException e) {e.printStackTrace();}}globalTxtMessage.append("文件复制成功:" + oldfile.getAbsolutePath() + "(size:" + (bytesum / 1024.0D) + "KB)\n");Long oldFileLastModifiedTime = Long.valueOf(oldfile.lastModified());newfile.setLastModified(oldFileLastModifiedTime.longValue());} else {globalTxtMessage.append("文件:" + oldfile.getAbsolutePath() + " 找不到!\n");}}
}

运行javac MyBak.java，java MyBak。

这时程序会从旧有项目拷贝一份和更新包相同的文件到bakeupFolder目录。

最后，我们就可以大胆的把更新包在项目中覆盖老文件了。

转载于:https://www.cnblogs.com/windyWu/p/4601607.html

本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！