- 列出一个文件夹下所有文件名
- 创建新文件
- 生成txt文件，写入指定字符串
- 使用BufferedWriter
- 使用PrintWriter
- 按行读文件
- 重命名
- 移动文件
- 依赖
- 移动文件夹，相当于覆盖
- 移动文件夹，某个文件夹，移动到另一个文件夹内
- 移动文件 ， 把文件移动到某个文件夹下
- 移动到文件夹，自动识别操作文件还是文件夹
列出一个文件夹下所有文件名
public void listFileOnDir(String fileDirPath) {File fileDir = new File(fileDirPath);String[] filesOnDir = fileDir.list();if (filesOnDir != null) {log.info("listFileOnDir, filesOnDir:{}", filesOnDir);for (String filePath : filesOnDir) {try {String fileFullPath = fileDir"/"filePath;File singleFile = new File(fileFullPath);log.info("listFileOnDir, singleFile: {}", singleFile);} catch (Exception e) {log.error("listFileOnDir error", e);}}}}创建新文件
public void createFile(String path, String filename) throws IOException {File file=new File(path "/" filename);if(!file.exists())file.createNewFile();}生成txt文件 ， 写入指定字符串
使用BufferedWriter
public void writeContentToText(String fileContent, String filePath, String fileName) throws IOException {// 生成的文件路径String fullPathName = filePath"/"fileName;File file = new File(fullPathName);if (!file.exists()) {file.getParentFile().mkdirs();}file.createNewFile();// write 解决中文乱码问题// FileWriter fw = new FileWriter(file, true);OutputStreamWriter fw = new OutputStreamWriter(new FileOutputStream(file), "UTF-8");BufferedWriter bw = new BufferedWriter(fw);bw.write(fileContent);bw.flush();bw.close();fw.close();}使用PrintWriter
public void writeContentToTextOther(String fileContent, String fileFullPath, String fileName) {FileOutputStream fos= null;PrintWriter pw = null;try {File sendFile = new File(fileFullPath);if (!sendFile.exists()) {sendFile.createNewFile();// 创建目标文件}fos = new FileOutputStream(sendFile);pw = new PrintWriter(fos);pw.write(fileContent.toCharArray());pw.flush();fos.close();} catch (IOException e) {log.error("writer file error", e);} finally {if (pw != null) {pw.close();}}}按行读文件
public void readFileOnLine(String fullFilePath) {try {File file = new File(fullFilePath);InputStreamReader inputReader = new InputStreamReader(new FileInputStream(file), "utf-8");BufferedReader bf = new BufferedReader(inputReader);// 按行读取字符串String lineContent;while ((lineContent = bf.readLine()) != null) {// TODO:按行解析读取的文件，测试是不是不同编码的文件都能解析log.info("readFileOnLine, lineContent:{}", lineContent);}bf.close();inputReader.close();} catch (IOException e) {e.printStackTrace();}}InputStream读取出文件是字节流，InputStreamReader可以将字节流转换为字符流
new InputStreamReader时可指定编码：
File file = new File(fullFilePath);InputStreamReader inputReader = new InputStreamReader(new FileInputStream(file), "utf-8");重命名
public void renameFile(String oldFullFilePath, String newFullFilePath) {File startFile = new File(oldFullFilePath);File endFile = new File(newFullFilePath);if (startFile.renameTo(endFile)) {log.info("文件移动成功！目标路径: {}", endFile.getAbsolutePath());} else {log.info("文件移动失败！起始路径: {}", startFile.getAbsolutePath());}}移动文件
移动文件一系列操作主要用 org.apache.commons.io下的包依赖
org.apache.commons commons-lang33.7 public void moveFile(File singleFile, String changeDir, String filePathOnDir) {String newGenFilePath = changeDir"/"filePathOnDir;File backedGeneratedCardFile = new File(newGenFilePath);try {FileUtils.moveFile(singleFile, backedGeneratedCardFile);} catch (Exception e) {log.error("moveFile error", e);}}移动文件夹 ， 相当于覆盖
【java文件操作整理-java文件操作】public void moveDirectory(String oldDirPath, String newDirPath) {File oldDir = new File(oldDirPath);File newDir = new File(newDirPath);try {FileUtils.moveDirectory(oldDir, newDir);} catch (Exception e) {log.error("moveDirectory error", e);}}移动文件夹，某个文件夹，移动到另一个文件夹内
public void moveDirToDirectory(String oldDirPath, String newDirPath) {File oldDir = new File(oldDirPath);File newDir = new File(newDirPath);try {FileUtils.moveDirectoryToDirectory(oldDir, newDir, true);} catch (Exception e) {log.error("moveDirToDirectory error", e);}}移动文件，把文件移动到某个文件夹下
public void moveFileToDirectory(String srcFilePath, String newDirPath) {File oldFile = new File(srcFilePath);File newDir = new File(newDirPath);try {FileUtils.moveFileToDirectory(oldFile, newDir, true);} catch (Exception e) {log.error("moveFileToDirectory error", e);}}移动到文件夹，自动识别操作文件还是文件夹
public void moveToDirectory(String srcPath, String newDirPath) {File srcInfo = new File(srcPath);File newDir = new File(newDirPath);try {FileUtils.moveToDirectory(srcInfo, newDir, true);} catch (Exception e) {log.error("moveFileToDirectory error", e);}}