package tool;

import java.io.File;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.List;

public class ModifyOracleVersion {

	public static void main(String[] args) {
		//將資料夾下11g的dmp檔案改為10g
		String dir = "D:\\dmp";
		List<String> fileNameList = getAllFile(dir,false);
		for (int i = 0; i < fileNameList.size(); i++) {
			oracle11gTo10g(fileNameList.get(i));
		}
		
		//單個檔案修改
		//oracle11gTo10g("D:\\exp0902\\acf_app_sm.dmp");
	}

	public static void oracle11gTo10g(String fileName) {
		try {
			RandomAccessFile raf = new RandomAccessFile(fileName, "rw");
			byte b[] = new byte[50];
			raf.read(b);
			for (int i = 0; i < b.length; i++) {
				System.out.print(b[i] + ",");
			}
			//這個是修改成10g：V10.02.01。如果在修改前自己可以截出頭部的幾個位元組確認一下，是不是就是修改第12,18位元組
			b[12] = 48;
			b[18] = 49;
			raf.seek(0);
			raf.write(b);
			raf.close();
			System.out.println("");
		} catch (Exception ex) {

		} finally {

		}
	}

	/**
	 * 遍歷資料夾
	 * @param path
	 * @param list
	 */
	public void traverseFolder(String path,List<String> list) {
        File file = new File(path);
        if (file.exists()) {
            File[] files = file.listFiles();
            if (files.length == 0) {
                System.out.println("資料夾是空的!");
                return;
            } else {
                for (File file2 : files) {
                    if (file2.isDirectory()) {
                        System.out.println("資料夾:" + file2.getAbsolutePath());
                        traverseFolder(file2.getAbsolutePath(),list);
                    } else {
                        System.out.println("檔案:" + file2.getAbsolutePath());
                        list.add(file2.getAbsolutePath());
                    }
                }
            }
        } else {
            System.out.println("檔案不存在!");
        }
    }
	
	  /**
     * 獲取路徑下的所有檔案/資料夾
     * @param directoryPath 需要遍歷的資料夾路徑
     * @param isAddDirectory 是否將子資料夾的路徑也新增到list集合中
     * @return
     */
    public static List<String> getAllFile(String directoryPath,boolean isAddDirectory) {
        List<String> list = new ArrayList<String>();
        File baseFile = new File(directoryPath);
        if (baseFile.isFile() || !baseFile.exists()) {
            return list;
        }
        File[] files = baseFile.listFiles();
        for (File file : files) {
            if (file.isDirectory()) {
                if(isAddDirectory){
                    list.add(file.getAbsolutePath());
                }
                list.addAll(getAllFile(file.getAbsolutePath(),isAddDirectory));
            } else {
                list.add(file.getAbsolutePath());
            }
        }
        return list;
    }
}