package com.stylefeng.guns.core.util;
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import com.stylefeng.guns.core.exception.GunsException;
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import com.stylefeng.guns.core.exception.GunsExceptionEnum;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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public class FileUtil {
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private static Logger log = LoggerFactory.getLogger(FileUtil.class);
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/**
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* NIO way
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*/
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public static byte[] toByteArray(String filename) {
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File f = new File(filename);
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if (!f.exists()) {
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log.error("文件未找到！" + filename);
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throw new GunsException(GunsExceptionEnum.FILE_NOT_FOUND);
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}
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FileChannel channel = null;
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FileInputStream fs = null;
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try {
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fs = new FileInputStream(f);
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channel = fs.getChannel();
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ByteBuffer byteBuffer = ByteBuffer.allocate((int) channel.size());
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while ((channel.read(byteBuffer)) > 0) {
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// do nothing
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// System.out.println("reading");
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}
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return byteBuffer.array();
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} catch (IOException e) {
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throw new GunsException(GunsExceptionEnum.FILE_READING_ERROR);
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} finally {
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try {
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channel.close();
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} catch (IOException e) {
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throw new GunsException(GunsExceptionEnum.FILE_READING_ERROR);
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}
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try {
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fs.close();
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} catch (IOException e) {
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throw new GunsException(GunsExceptionEnum.FILE_READING_ERROR);
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}
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}
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}
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/**
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* 删除目录
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*
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* @author fengshuonan
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* @Date 2017/10/30 下午4:15
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*/
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public static boolean deleteDir(File dir) {
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if (dir.isDirectory()) {
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String[] children = dir.list();
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for (int i = 0; i < children.length; i++) {
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boolean success = deleteDir(new File(dir, children[i]));
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if (!success) {
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return false;
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}
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}
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}
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return dir.delete();
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}
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}
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