将文件转换为char类型的文件

package cra.base.util;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
/**
 * 
 * @author 
 *
 */
public class FileUtil {
	private int fileIndex = 1;
	private int index = 1;
	private File targetFile;
	private String filePath;

	public static void main(String[] args) {

		FileUtil fileUtil = new FileUtil();
		String filePath = "d:/user/80002253/桌面/gradle";
		fileUtil.setFilePath(filePath);
		fileUtil.getBytesToFile2(filePath);

	}

	/**
	 * @param filePath
	 *            文件夹路径
	 */
	public void getBytesToFile2(String filePath) {
		File file = new File(filePath);
		if (file.isDirectory()) {
			File[] files = file.listFiles();
			for (File file2 : files) {
				file = file2;
				getBytesToFile2(file2.getAbsolutePath());
			}
		} else {
			if (index % 5 == 0) {
				String absolutePath = targetFile.getAbsolutePath();
				targetFile = new File(absolutePath.substring(0,
						absolutePath.lastIndexOf("."))
						+ fileIndex++
						+ absolutePath.substring(absolutePath.lastIndexOf(".")));
				getBytesToFile(file, targetFile);
			} else {
				getBytesToFile(file, targetFile);
			}
			index++;
		}
	}

	/**
	 * 生成文件
	 * 
	 * @param filePath
	 *            资源文件路径
	 */
	public void getFile(String filePath) {
		File file = new File(filePath);
		File[] files = file.listFiles();
		for (File f : files) {
			transfer(f);
		}
	}

	/**
	 * 转换文件成正常形态
	 * 
	 * @param file
	 */
	private void transfer(File file) {
		BufferedReader br = null;
		FileOutputStream fos = null;
		try {
			br = new BufferedReader(new FileReader(file));
			String line;
			while ((line = br.readLine()) != null) {
				String[] split = line.split(">>");
				fos = new FileOutputStream(split[0]);
				String[] chars = split[1].split(",");
				for (String s : chars) {
					fos.write(Integer.parseInt(s));
					fos.flush();
				}
			}

		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (br != null) {
					br.close();
				}
				if (fos != null) {
					fos.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

	}

	/**
	 * 
	 * @param file
	 * @param filePath
	 */
	private byte[] getBytesToFile(File file, File targetFile) {
		InputStream is = null;
		BufferedWriter bufferedWriter = null;
		byte[] buffer = null;
		try {
			is = new FileInputStream(file);
			byte[] b = new byte[1000];
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			bufferedWriter = new BufferedWriter(
					new FileWriter(targetFile, true));
			int n;
			while ((n = is.read(b)) != -1) {
				bos.write(b, 0, n);
			}
			bos.close();
			buffer = bos.toByteArray();
			bufferedWriter.write(file.getAbsolutePath() + ">>");
			for (int i = 0; i < buffer.length; i++) {
				int c = buffer[i];
				if (i == buffer.length - 1) {
					bufferedWriter.write(c + "");
					break;
				}
				bufferedWriter.write(c + ",");
			}
			bufferedWriter.newLine();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (is != null) {
					is.close();
				}
				if (bufferedWriter != null) {
					bufferedWriter.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return buffer;
	}

	public String getFilePath() {
		return filePath;
	}

	public void setFilePath(String filePath) {
		this.filePath = filePath;
		targetFile = new File(this.filePath + "3" + "/file.txt");
	}
}