JAVA写的一个文件夹的文件拷贝另一个文件夹的下
2013-10-19 02:13
543 查看
package com.upload;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public class Upload {
/**
* 功能:Java读取txt文件的内容
* 步骤:1:先获得文件句柄
* 2:获得文件句柄当做是输入一个字节码流,需要对这个输入流进行读取
* 3:读取到输入流后,需要读取生成字节流
* 4:一行一行的输出。readline()。
* 备注:需要考虑的是异常情况
* @param filePath
*/
public List<String> readTxtFile(String filePath){
List<String> files = new ArrayList<String>();
try {
String encoding="GBK";
File file=new File(filePath);
if(file.isFile() && file.exists()){ //判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file),encoding);//考虑到编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while((lineTxt = bufferedReader.readLine()) != null){
String temp[] = lineTxt.replaceAll("\\\\","/").split("/");
if (temp.length > 1) {
lineTxt = temp[temp.length - 1];
}
System.out.println(lineTxt);
files.add(lineTxt);
}
read.close();
}else{
System.out.println("找不到指定的文件");
}
} catch (Exception e) {
System.out.println("读取文件内容出错");
e.printStackTrace();
}
return files;
}
/**
* 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
4000
(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();
}
}
public static void main(String[] args) throws Exception {
Upload upload = new Upload();
List<String> files = new ArrayList<String>();
String filePath = "E:"+File.separator+"Work"+File.separator+"Upload"+File.separator+"src" + File.separator + "filepathname.txt";
int number = upload.readTxtFile(filePath).size();
System.out.println("总数为:" + number);
files = upload.readTxtFile(filePath);
}
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public class Upload {
/**
* 功能:Java读取txt文件的内容
* 步骤:1:先获得文件句柄
* 2:获得文件句柄当做是输入一个字节码流,需要对这个输入流进行读取
* 3:读取到输入流后,需要读取生成字节流
* 4:一行一行的输出。readline()。
* 备注:需要考虑的是异常情况
* @param filePath
*/
public List<String> readTxtFile(String filePath){
List<String> files = new ArrayList<String>();
try {
String encoding="GBK";
File file=new File(filePath);
if(file.isFile() && file.exists()){ //判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file),encoding);//考虑到编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while((lineTxt = bufferedReader.readLine()) != null){
String temp[] = lineTxt.replaceAll("\\\\","/").split("/");
if (temp.length > 1) {
lineTxt = temp[temp.length - 1];
}
System.out.println(lineTxt);
files.add(lineTxt);
}
read.close();
}else{
System.out.println("找不到指定的文件");
}
} catch (Exception e) {
System.out.println("读取文件内容出错");
e.printStackTrace();
}
return files;
}
/**
* 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
4000
(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();
}
}
public static void main(String[] args) throws Exception {
Upload upload = new Upload();
List<String> files = new ArrayList<String>();
String filePath = "E:"+File.separator+"Work"+File.separator+"Upload"+File.separator+"src" + File.separator + "filepathname.txt";
int number = upload.readTxtFile(filePath).size();
System.out.println("总数为:" + number);
files = upload.readTxtFile(filePath);
}