java-file

1.递归调取文件夹下所有文件（包含子目录）

public static void getAllFile(File file){
        File[] files = file.listFiles();
        for(File f:files) {
            if(f.isDirectory()) {
                getAllFile(f);
            }else {
                System.err.println("获取文件地址："+f);
            }
        }
    }

 2.调取文件夹下所有文件（不包含子目录）

public static List<String> getAllFileName(String path) {
		File file = new File(path);
		File[] tempList = file.listFiles();
		List<String> fileNameList = new ArrayList<String>();
		for (int i = 0; i < tempList.length; i++) {
			if (tempList[i].isFile()) {
				fileNameList.add(tempList[i].getName());
			}
		}
		return fileNameList;
	}

3.读取文件文件名

public static String readFileContent(String fileName) throws IOException {
		List<String> lines=new ArrayList<String>();  
		BufferedReader br=new BufferedReader(new InputStreamReader(new FileInputStream(fileName),"UTF-8"));  
		String line = null;  
		while ((line = br.readLine()) != null) {  
			lines.add(line);  
		}  
		br.close(); 
		String result = "";
		for (String string : lines) {
			result = string;
		}
		return result;
	}

4.实现文件的剪切

public static void showCut(String path,String outPath,String context) throws IOException {
		String result = readFileContent(path);
		String txtName = path.substring(path.lastIndexOf("/"), path.length());
		File dir = new File(outPath);
		if (!dir.exists()) {
			dir.mkdirs();
		}
		File checkFile = new File(outPath +"/"+txtName);
		FileWriter writer = null;
		try {
			if (!checkFile.exists()) {
			}
			writer = new FileWriter(checkFile, true);
			writer.append(result);
			writer.flush();
			File f = new File(path);
			Del(f);
			createFile(context);
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (null != writer)
				writer.close();
		}
	}
/**
* 	复制完成后删除文件
*/
public static void Del(File f) {
	if (f.isFile()) {
		f.delete();
	} else {
		File[] arr = f.listFiles();
		for (int i = 0; i < arr.length; i++) {
			Del(arr[i]);
		}
		f.delete();
	}
}

5.写入文件

public static void createFile(String content) throws IOException {
		File dir = new File(logfile);
		if (!dir.exists()) {
			dir.mkdirs();
		}
		Date date = new Date();
		SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMdd");
		String strTime = simpleDateFormat.format(date);
		File checkFile = new File(logfile +"logs_"+strTime+".txt");
		FileWriter writer = null;
		try {
			if (!checkFile.exists()) {
			}
			writer = new FileWriter(checkFile, true);
			writer.append(content);
			writer.flush();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (null != writer)
				writer.close();
		}
	}