package com.matrix.system.hive.plugin.util;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import com.matrix.core.tools.StringUtils;
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import org.apache.log4j.Logger;
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/**
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* 文件操作工具类
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* @author Ron
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* @createTime 2014.08.30
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*/
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public class FileUtils {
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public static Logger log = Logger.getLogger(FileUtils.class);
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public static final String FILE_FORMAT_CHAR = ".";
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/**
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* 创建文件，如果文件名称为空，则返回null
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*
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* @param fileName
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* @return
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*/
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public static File createFile(String fileName) {
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if (StringUtils.isNotBlank(fileName)) {
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return new File(fileName);
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}
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return null;
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}
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/**
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* 在文件夹下创建文件
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*
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* @param folderName
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* @param fileName
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* @return
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*/
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public static File createFileInFolder(String folderName, String fileName) {
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if (StringUtils.isNotBlank(fileName)) {
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File folder = createFolder(folderName);
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if (folder != null) {
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return new File(folder, fileName);
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}
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}
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return null;
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}
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/**
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* 在文件夹下创建文件
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*
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* @param folder
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* @param fileName
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* @return
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*/
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public static File createFileInFolder(File folder, String fileName) {
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if (StringUtils.isNotBlank(fileName)) {
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if (folder != null) {
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return new File(folder, fileName);
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}
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}
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return null;
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}
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/**
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* 创建文件夹
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*
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* @param folderName
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* @return
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*/
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public static File createFolder(String folderName) {
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if (StringUtils.isNotBlank(folderName)) {
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File file = new File(folderName);
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if (!file.exists()) {
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if (file.mkdirs()) {
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return file;
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} else {
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log.warn("create folder[" + folderName + "] failed.");
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}
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} else {
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return file;
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}
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}
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return null;
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}
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/**
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* 在文件夹下创建文件夹
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*
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* @param folder
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* @param folderName
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* @return
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*/
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public static File createFolder(File folder, String folderName) {
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if (StringUtils.isNotBlank(folderName)) {
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if (folder == null) {
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return null;
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}
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File file = new File(folder, folderName);
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if (!file.exists()) {
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if (file.mkdirs()) {
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return file;
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} else {
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log.warn("create folder[" + folderName + "] failed.");
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}
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}
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}
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return null;
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}
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/**
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* 在文件夹下创建文件夹
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*
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* @param folder
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* @param folderName
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* @return
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*/
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public static File createFolder(String parentFolderName, String folderName) {
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if (StringUtils.isNotBlank(folderName) && StringUtils.isNotBlank(parentFolderName)) {
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parentFolderName = parentFolderName + File.separator + folderName;
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return createFolder(parentFolderName);
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}
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return null;
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}
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/**
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* 删除文件
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* @param fileName
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*/
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public static void deleteFile(String fileName) {
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if (StringUtils.isBlank(fileName)) {
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return;
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}
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File file = new File(fileName);
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file.deleteOnExit();
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}
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/**
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* 将文件sourceFile重命名targetFile
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* @param sourceFile
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* @param targetFile
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*/
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public static void moveFile(String sourceFile, String targetFile) {
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if (StringUtils.isBlank(sourceFile) || StringUtils.isBlank(targetFile)) {
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return;
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}
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File file = new File(sourceFile);
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file.renameTo(new File(targetFile));
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}
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/**
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* 将文件sourceFile重命名targetFile
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* @param sourceFile
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* @param targetFolder
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* @param targetFile
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*/
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public static void moveFile(String sourceFile, String targetFolder, String targetFile) {
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if (StringUtils.isNotBlank(targetFolder)) {
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createFolder(targetFolder);
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}
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moveFile(sourceFile, targetFile);
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}
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/**
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* 获取文件格式
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* @param fileName
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* @return
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*/
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public static String getFileFormat(String fileName) {
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if (StringUtils.isBlank(fileName)) {
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return fileName;
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}
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int index = fileName.lastIndexOf(FILE_FORMAT_CHAR);
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if (index > -1) {
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return fileName.substring(index + 1, fileName.length());
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}
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return fileName;
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}
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/**
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* 校验文件的格式
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* @param fileName 文件名称
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* @param fileTypes 合法的文件格式
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* @return
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*/
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public static boolean checkFileType(String fileName, String[] fileTypes) {
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if (StringUtils.isBlank(fileName) || fileTypes == null) {
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return true;
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}
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String fileFormat = getFileFormat(fileName);
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for (String fileType : fileTypes) {
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//匹配合法格式
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if (StringUtils.equalsIgnoreCase(fileFormat, fileType)) {
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return true;
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}
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}
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return false;
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}
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/**
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* 将文件内容按照行读取到list
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* @param file
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* @return
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* @throws IOException
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*/
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public static List<String> readLines(File file) throws IOException {
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List<String> list = new ArrayList<String>();
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BufferedReader reader = new BufferedReader(new FileReader(file));
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String line = null;
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do {
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line = reader.readLine();
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if (line != null) {
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list.add(line);
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}
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} while (line != null);
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return list;
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}
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}
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