文件工具

package com.file.util;import java.io.BufferedOutputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.security.SecureRandom;import java.text.SimpleDateFormat;import java.util.Date;import org.apache.commons.lang.StringUtils;import org.apache.log4j.Logger;/** * 文件处理工具类 *  * @author wlf */public class FileUtil {private static Logger logger = Logger.getLogger(FileUtil.class);private FileUtil() {}private static final String[][] MIME_MapTable = {{ ".doc", "application/msword" },{ ".docx","application/vnd.openxmlformats-officedocument.wordprocessingml.document" },{ ".xls", "application/vnd.ms-excel" },{ ".xlsx","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" },{ ".pdf", "application/pdf" },{ ".ppt", "application/vnd.ms-powerpoint" },{ ".pptx","application/vnd.openxmlformats-officedocument.presentationml.presentation" },{ ".txt", "text/plain" }, { ".wps", "application/vnd.ms-works" },{ ".bmp", "image/bmp" }, { ".gif", "image/gif" },{ ".png", "image/png" }, { ".jpg", "image/jpeg" },{ ".jpeg", "image/jpeg" }, { ".ico", "image/x-icon" } };/** * 获取文件MIME类型 *  * @param str *            文件后缀名 * @return 文件MIME类型 */public static String getMIMEType(String str) {String type = "";if (str != null) {for (int i = 0; i < MIME_MapTable.length; i++) {if (str.equals(MIME_MapTable[i][0])) {type = MIME_MapTable[i][1];}}}return type;}/** * 根据传入的路径生成对应目录 *  * @param path */public static void createFilePath(String path) {try {if (path.indexOf(".") > 0) {path = path.substring(0, path.lastIndexOf("/"));}File file = new File(path);if (!file.exists()) {file.mkdirs();}} catch (Exception e) {logger.error("生成文件目录出错！", e);}}/** * 生成word文件路径 *  * @return */public static String getNewFileName() {try {SecureRandom sr = new SecureRandom();Date now = new java.sql.Date(System.currentTimeMillis());String dateMonth = new SimpleDateFormat("yyyyMM").format(now);String fileName = new SimpleDateFormat("yyyyMMddHHmmsss").format(now);for (int j = 0; j < 4; j++) {fileName += sr.nextInt(10);}fileName += ".doc";return dateMonth + "/" + fileName;} catch (Exception e) {logger.error("获取文件路径出错！", e);}return "";}/** * 文件转字节数组 *  * @param filePath *            文件路径或文件名 * @return */public static byte[] File2byte(String filePath) {byte[] buffer = null;try {File file = new File(filePath);FileInputStream fis = new FileInputStream(file);ByteArrayOutputStream bos = new ByteArrayOutputStream();byte[] b = new byte[1024];int n;while ((n = fis.read(b)) != -1) {bos.write(b, 0, n);}fis.close();bos.close();buffer = bos.toByteArray();} catch (FileNotFoundException e) {logger.error("文件未找到！", e);} catch (IOException e) {logger.error("读写文件出错！", e);}return buffer;}/** * 文件转字节数组 *  * @param filePath *            文件路径或文件名 * @return */public static byte[] File2byteByUrl(String filePath) {byte[] buffer = null;URL url = null;InputStream is = null;ByteArrayOutputStream bos = new ByteArrayOutputStream();try {url = new URL(filePath);HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 利用HttpURLConnection对象,我们可以从网络中获取网页数据.conn.setDoInput(true);conn.connect();is = conn.getInputStream(); // 得到网络返回的输入流byte[] b = new byte[1024];int n;while ((n = is.read(b)) != -1) {bos.write(b, 0, n);}is.close();bos.close();buffer = bos.toByteArray();} catch (MalformedURLException e) {logger.error("url错误！", e);} catch (IOException e) {logger.error("文件读写错误！", e);}return buffer;}/** * 根据传入的地址获取文件大小 *  * @param filePath *            网络文件路径 * @return */public static long getFileSize(String filePath) {long filesize = 0;URL url = null;ByteArrayOutputStream bos = new ByteArrayOutputStream();try {url = new URL(filePath);HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 利用HttpURLConnection对象,我们可以从网络中获取网页数据.filesize = conn.getContentLengthLong();if (filesize > 0) {filesize /= 1024;}bos.close();return filesize;} catch (MalformedURLException e) {logger.error("url错误！", e);} catch (IOException e) {logger.error("文件读写错误！", e);}return 0;}/** * 字节数组转文件 *  * @param buf *            字节数组 * @param filePath *            文件路径 * @param fileName *            文件名 */public static void byte2File(byte[] buf, String filePath, String fileName) {BufferedOutputStream bos = null;FileOutputStream fos = null;File file = null;try {File dir = new File(filePath);if (!dir.exists() && dir.isDirectory()) {dir.mkdirs();}file = new File(filePath + File.separator + fileName);fos = new FileOutputStream(file);bos = new BufferedOutputStream(fos);bos.write(buf);} catch (Exception e) {logger.error("字节数组转文件出错！", e);} finally {if (bos != null) {try {bos.close();} catch (IOException e) {logger.error("关闭输出流出错！", e);}}if (fos != null) {try {fos.close();} catch (IOException e) {logger.error("关闭文件输出流出错！", e);}}}}/** * 获取文件后缀名 *  * @param filepath *            文件路径或文件名 * @return */public static String getFileSuffix(String filepath) {String fileSuffix = "";try {if (StringUtils.isNotEmpty(filepath)) {fileSuffix = filepath.substring(filepath.lastIndexOf("."),filepath.length());fileSuffix = fileSuffix.toLowerCase();}} catch (Exception e) {logger.error("获取文件后缀名出错！", e);}return fileSuffix;}/** * 获取文件名 *  * @param filepath * @return */public static String getFileName(String filepath) {String filename = "";try {File file = new File(filepath);filename = file.getName();} catch (Exception e) {logger.error("获取文件名出错！", e);}return filename;}}