/** *備份恢復數據庫抽象類，抽象出了針對各個數據庫來說通用的功能 * @author */ public abstract class AbstractBackupService implements BackupService{ protected final APDPlatLogger LOG = new APDPlatLogger(getClass()); protected static final StandardPBEStringEncryptor encryptor; protected static final String username; protected static final String password; //從配置文件中獲取數據庫用戶名和密碼，如果用戶名和密碼被加密，則解密 static{ EnvironmentStringPBEConfig config=new EnvironmentStringPBEConfig(); config.setAlgorithm("PBEWithMD5AndDES"); config.setPassword("config"); encryptor=new StandardPBEStringEncryptor(); encryptor.setConfig(config); String uname=PropertyHolder.getProperty("db.username"); String pwd=PropertyHolder.getProperty("db.password"); if(uname!=null && uname.contains("ENC(") && uname.contains(")")){ uname=uname.substring(4,uname.length()-1); username=decrypt(uname); }else{ username=uname; } if(pwd!=null && pwd.contains("ENC(") && pwd.contains(")")){ pwd=pwd.substring(4,pwd.length()-1); password=decrypt(pwd); }else{ password=pwd; } } @Override public String getBackupFilePath(){ String path="/WEB-INF/backup/"+PropertyHolder.getProperty("jpa.database")+"/"; path=FileUtils.getAbsolutePath(path); File file=new File(path); if(!file.exists()){ file.mkdirs(); } return path; } @Override public File getNewestBackupFile(){ Map<String,File> map = new HashMap<>(); List<String> list = new ArrayList<>(); String path=getBackupFilePath(); File dir=new File(path); File[] files=dir.listFiles(); for(File file : files){ String name=file.getName(); if(!name.contains("bak")) { continue; } map.put(name, file); list.add(name); } if(list.isEmpty()){ return null; } //按備份時間排序 Collections.sort(list); //最新備份的在最前面 Collections.reverse(list); String name = list.get(0); File file = map.get(name); //加速垃圾回收 list.clear(); map.clear(); return file; } @Override public List<String> getExistBackupFileNames(){ List<String> result=new ArrayList<>(); String path=getBackupFilePath(); File dir=new File(path); File[] files=dir.listFiles(); for(File file : files){ String name=file.getName(); if(!name.contains("bak")) { continue; } name=name.substring(0, name.length()-4); String[] temp=name.split("-"); String y=temp[0]; String m=temp[1]; String d=temp[2]; String h=temp[3]; String mm=temp[4]; String s=temp[5]; name=y+"-"+m+"-"+d+" "+h+":"+mm+":"+s; result.add(name); } //按備份時間排序 Collections.sort(result); //最新備份的在最前面 Collections.reverse(result); return result; } /** * 解密用戶名和密碼 * @param encryptedMessage 加密后的用戶名或密碼 * @return 解密后的用戶名或密碼 */ protected static String decrypt(String encryptedMessage){ String plain=encryptor.decrypt(encryptedMessage); return plain; } } |