java自定义文件操作类实例代码
- package cn.edu.tongji.cims.wade.system;
- import java.io.*;
- public class FileOperate {
- public FileOperate() {
- }
- /**
- * 新建目录
- * @param folderPath String 如 c:/fqf
- * @return boolean
- */
- public void newFolder(String folderPath) {
- try {
- String filePath = folderPath;
- filePath = filePath.toString();
- java.io.File myFilePath = new java.io.File(filePath);
- if (!myFilePath.exists()) {
- myFilePath.mkdir();
- }
- }
- catch (Exception e) {
- System.out.println("新建目录操作出错");
- e.printStackTrace();
- }
- }
- /**
- * 新建文件
- * @param filePathAndName String 文件路径及名称 如c:/fqf.txt
- * @param fileContent String 文件内容
- * @return boolean
- */
- public void newFile(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);
- resultFile.close();
- }
- catch (Exception e) {
- System.out.println("新建目录操作出错");
- e.printStackTrace();
- }
- }
- /**
- * 删除文件
- * @param filePathAndName String 文件路径及名称 如c:/fqf.txt
- * @param fileContent String
- * @return boolean
- */
- public void delFile(String filePathAndName) {
- try {
- String filePath = filePathAndName;
- filePath = filePath.toString();
- java.io.File myDelFile = new java.io.File(filePath);
- myDelFile.delete();
- }
- catch (Exception e) {
- System.out.println("删除文件操作出错");
- e.printStackTrace();
- }
- }
- /**
- * 删除文件夹
- * @param filePathAndName String 文件夹路径及名称 如c:/fqf
- * @param fileContent String
- * @return boolean
- */
- public void delFolder(String folderPath) {
- try {
- delAllFile(folderPath); //删除完里面所有内容
- String filePath = folderPath;
- filePath = filePath.toString();
- java.io.File myFilePath = new java.io.File(filePath);
- myFilePath.delete(); //删除空文件夹
- }
- catch (Exception e) {
- System.out.println("删除文件夹操作出错");
- e.printStackTrace();
- }
- }
- /**
- * 删除文件夹里面的所有文件
- * @param path String 文件夹路径 如 c:/fqf
- */
- public void delAllFile(String path) {
- File file = new File(path);
- if (!file.exists()) {
- return;
- }
- if (!file.isDirectory()) {
- return;
- }
- 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]);//先删除文件夹里面的文件
- delFolder(path "/" tempList[i]);//再删除空文件夹
- }
- }
- }
- /**
- * 复制单个文件
- * @param oldPath String 原文件路径 如:c:/fqf.txt
- * @param newPath String 复制后路径 如:f:/fqf.txt
- * @return boolean
- */
- public void copyFile(String oldPath, String newPath) {
- try {
- int bytesum = 0;
- int byteread = 0;
- File oldfile = new File(oldPath);
- if (oldfile.exists()) { //文件存在时
- InputStream inStream = new FileInputStream(oldPath); //读入原文件
- FileOutputStream fs = new FileOutputStream(newPath);
- byte[] buffer = new byte[1444];
- int length;
- while ( (byteread = inStream.read(buffer)) != -1) {
- bytesum = byteread; //字节数 文件大小
- System.out.println(bytesum);
- fs.write(buffer, 0, byteread);
- }
- inStream.close();
- }
- }
- catch (Exception e) {
- System.out.println("复制单个文件操作出错");
- e.printStackTrace();
- }
- }
- /**
- * 复制整个文件夹内容
- * @param oldPath String 原文件路径 如:c:/fqf
- * @param newPath String 复制后路径 如:f:/fqf/ff
- * @return boolean
- */
- public void copyFolder(String oldPath, String newPath) {
- try {
- (new File(newPath)).mkdirs(); //如果文件夹不存在 则建立新文件夹
- 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()){//如果是子文件夹
- copyFolder(oldPath "/" file[i],newPath "/" file[i]);
- }
- }
- }
- catch (Exception e) {
- System.out.println("复制整个文件夹内容操作出错");
- e.printStackTrace();
- }
- }
- /**
- * 移动文件到指定目录
- * @param oldPath String 如:c:/fqf.txt
- * @param newPath String 如:d:/fqf.txt
- */
- public void moveFile(String oldPath, String newPath) {
- copyFile(oldPath, newPath);
- delFile(oldPath);
- }
- /**
- * 移动文件到指定目录
- * @param oldPath String 如:c:/fqf.txt
- * @param newPath String 如:d:/fqf.txt
- */
- public void moveFolder(String oldPath, String newPath) {
- copyFolder(oldPath, newPath);
- delFolder(oldPath);
- }
- }
补充:软件开发 , Java ,