FileOperate实现的功能:
1. 返回文件夹中所有文件列表
2. 读取文本文件内容
3. 新建目录
4. 新建多级目录
5. 新建文件
6. 有编码方式的创建文件
7. 删除文件
8. 删除指定文件夹下所有文件
9. 复制单个文件
10. 复制整个文件夹的内容
11. 移动文件
12. 移动目录
13. 建立一个可以追加的bufferedwriter
14. 得到一个bufferedreader
- package utils;
-
- import java.io.BufferedReader;
- import java.io.BufferedWriter;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileNotFoundException;
- import java.io.FileOutputStream;
- import java.io.FileWriter;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- import java.io.PrintWriter;
- import java.util.StringTokenizer;
-
- public class FileOperate {
-
- private String message;
-
- public FileOperate() {
- }
-
-
-
-
-
-
-
- public File[] getFileList(String filepath) {
- File d = null;
- File list[] = null;
-
- try {
- d = new File(filepath);
- if (d.exists()) {
- list = d.listFiles();
- }
- } catch (Exception ex) {
- ex.printStackTrace();
- message = "遍历文件夹出错";
- }
-
-
- return list;
- }
-
-
-
-
-
-
-
-
-
-
- public String readTxt(String filePathAndName, String encoding)
- throws IOException {
- encoding = encoding.trim();
- StringBuffer str = new StringBuffer("");
- String st = "";
- try {
- FileInputStream fs = new FileInputStream(filePathAndName);
- InputStreamReader isr;
- if (encoding.equals("")) {
- isr = new InputStreamReader(fs);
- } else {
- isr = new InputStreamReader(fs, encoding);
- }
- BufferedReader br = new BufferedReader(isr);
- try {
- String data = "";
- while ((data = br.readLine()) != null) {
- str.append(data);
- }
- } catch (Exception e) {
- str.append(e.toString());
- }
- st = str.toString();
- if (st != null && st.length() > 1)
- st = st.substring(0, st.length() - 1);
- } catch (IOException es) {
- st = "";
- }
- return st;
- }
-
-
-
-
-
-
-
-
- public String createFolder(String folderPath) {
- String txt = folderPath;
- try {
- java.io.File myFilePath = new java.io.File(txt);
- txt = folderPath;
- if (!myFilePath.exists()) {
- myFilePath.mkdir();
- }
- } catch (Exception e) {
- message = "创建目录操作出错";
- }
- return txt;
- }
-
-
-
-
-
-
-
-
-
-
- public String createFolders(String folderPath, String paths) {
- String txts = folderPath;
- try {
- String txt;
- txts = folderPath;
- StringTokenizer st = new StringTokenizer(paths, "|");
- for (int i = 0; st.hasMoreTokens(); i++) {
- txt = st.nextToken().trim();
- if (txts.lastIndexOf("/") != -1) {
- txts = createFolder(txts + txt);
- } else {
- txts = createFolder(txts + txt + "/");
- }
- }
- } catch (Exception e) {
- message = "创建目录操作出错";
- }
- return txts;
- }
-
-
-
-
-
-
-
-
-
-
- public void createFile(String filePathAndName, String fileContent) {
-
- try {
- String filePath = filePathAndName;
- filePath = filePath.toString();
- File myFilePath = new File(filePath);
- if (!myFilePath.exists()) {
- myFilePath.createNewFile();
- }
- FileWriter resultFile = new FileWriter(myFilePath);
- PrintWriter myFile = new PrintWriter(resultFile);
- String strContent = fileContent;
- myFile.println(strContent);
- myFile.close();
- resultFile.close();
- } catch (Exception e) {
- message = "创建文件操作出错";
- }
- }
-
-
-
-
-
-
-
-
-
-
-
-
- public void createFile(String filePathAndName, String fileContent,
- String encoding) {
-
- try {
- String filePath = filePathAndName;
- filePath = filePath.toString();
- File myFilePath = new File(filePath);
- if (!myFilePath.exists()) {
- myFilePath.createNewFile();
- }
- PrintWriter myFile = new PrintWriter(myFilePath, encoding);
- String strContent = fileContent;
- myFile.println(strContent);
- myFile.close();
- } catch (Exception e) {
- message = "创建文件操作出错";
- }
- }
-
-
-
-
-
-
-
-
- public boolean delFile(String filePathAndName) {
- boolean bea = false;
- try {
- String filePath = filePathAndName;
- File myDelFile = new File(filePath);
- if (myDelFile.exists()) {
- myDelFile.delete();
- bea = true;
- } else {
- bea = false;
- message = (filePathAndName + "删除文件操作出错");
- }
- } catch (Exception e) {
- message = e.toString();
- }
- return bea;
- }
-
-
-
-
-
-
-
-
- public void delFolder(String folderPath) {
- try {
- delAllFile(folderPath);
- String filePath = folderPath;
- filePath = filePath.toString();
- java.io.File myFilePath = new java.io.File(filePath);
- myFilePath.delete();
- } catch (Exception e) {
- message = ("删除文件夹操作出错");
- }
- }
-
-
-
-
-
-
-
-
-
- public boolean delAllFile(String path) {
- boolean bea = false;
- File file = new File(path);
- if (!file.exists()) {
- return bea;
- }
- if (!file.isDirectory()) {
- return bea;
- }
- String[] tempList = file.list();
- File temp = null;
- for (int i = 0; i < tempList.length; i++) {
- if (path.endsWith(File.separator)) {
- temp = new File(path + tempList[i]);
- } else {
- temp = new File(path + File.separator + tempList[i]);
- }
- if (temp.isFile()) {
- temp.delete();
- }
- if (temp.isDirectory()) {
- delAllFile(path + "/" + tempList[i]);
- delFolder(path + "/" + tempList[i]);
- bea = true;
- }
- }
- return bea;
- }
-
-
-
-
-
-
-
-
-
-
- public void copyFile(String oldPathFile, String newPathFile) {
- try {
- int bytesum = 0;
- int byteread = 0;
- File oldfile = new File(oldPathFile);
- if (oldfile.exists()) {
- InputStream inStream = new FileInputStream(oldPathFile);
- FileOutputStream fs = new FileOutputStream(newPathFile);
- byte[] buffer = new byte[1444];
- while ((byteread = inStream.read(buffer)) != -1) {
- bytesum += byteread;
- System.out.println(bytesum);
- fs.write(buffer, 0, byteread);
- }
- inStream.close();
- }
- } catch (Exception e) {
- message = ("复制单个文件操作出错");
- }
- }
-
-
-
-
-
-
-
-
-
-
- public void copyFolder(String oldPath, String newPath) {
- try {
- new File(newPath).mkdirs();
- File a = new File(oldPath);
- String[] file = a.list();
- File temp = null;
- for (int i = 0; i < file.length; i++) {
- if (oldPath.endsWith(File.separator)) {
- temp = new File(oldPath + file[i]);
- } else {
- temp = new File(oldPath + File.separator + file[i]);
- }
- if (temp.isFile()) {
- FileInputStream input = new FileInputStream(temp);
- FileOutputStream output = new FileOutputStream(newPath
- + "/" + (temp.getName()).toString());
- byte[] b = new byte[1024 * 5];
- int len;
- while ((len = input.read(b)) != -1) {
- output.write(b, 0, len);
- }
- output.flush();
- output.close();
- input.close();
- }
- if (temp.isDirectory()) {
- copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);
- }
- }
- } catch (Exception e) {
- message = "复制整个文件夹内容操作出错";
- }
- }
-
-
-
-
-
-
-
-
- public void moveFile(String oldPath, String newPath) {
- copyFile(oldPath, newPath);
- delFile(oldPath);
- }
-
-
-
-
-
-
-
-
- public void moveFolder(String oldPath, String newPath) {
- copyFolder(oldPath, newPath);
- delFolder(oldPath);
- }
-
-
-
-
-
-
-
-
- public BufferedWriter getWriter(String fileDir, String fileName) {
- try {
- File f1 = new File(fileDir);
- if (!f1.exists()) {
- f1.mkdirs();
- }
- f1 = new File(fileDir, fileName);
- if (!f1.exists()) {
- f1.createNewFile();
- }
- BufferedWriter bw = new BufferedWriter(new FileWriter(f1.getPath(),
- true));
- return bw;
- } catch (Exception e) {
- System.out.println(e.getLocalizedMessage());
- return null;
- }
- }
-
-
-
-
-
-
-
-
-
- public BufferedReader getReader(String fileDir, String fileName,
- String encoding) {
- try {
- File file = new File(fileDir, fileName);
- InputStreamReader read = new InputStreamReader(new FileInputStream(
- file), encoding);
- BufferedReader br = new BufferedReader(read);
- return br;
-
- } catch (FileNotFoundException ex) {
- ex.printStackTrace();
- return null;
- } catch (IOException e) {
- e.printStackTrace();
- return null;
- }
-
- }
-
- public String getMessage() {
- return this.message;
- }
- }
Java IO(文件操作工具类),布布扣,bubuko.com
Java IO(文件操作工具类)
原文:http://www.cnblogs.com/564085446java/p/3731252.html