增量更新项目时的备份
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所更新的文件。
把更新包放在指定目录，配好如下webappFolder、updateFolder已经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 xx.java，java xx
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。