java修改文件名
import java.io.*;
public class test1
{
public static void main(String[] args) {
File file=new File("D:/gai.jpg"); //指定文件名及路徑
String name="123";
String filename=file.getAbsolutePath();
if(filename.indexOf(".")>=0)
{
filename = filename.substring(0,filename.lastIndexOf("."));
}
file.renameTo(new File(name+".jpg")); //改名
}
}
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1.創(chuàng)建文件夾
//import java.io.*;
File myFolderPath = new File(%%1);
try {
if (!myFolderPath.exists()) {
myFolderPath.mkdir();
}
}
catch (Exception e) {
System.out.println("新建目錄操作出錯(cuò)");
e.printStackTrace();
}
2.創(chuàng)建文件
//import java.io.*;
File myFilePath = new File(%%1);
try {
if (!myFilePath.exists()) {
myFilePath.createNewFile();
}
FileWriter resultFile = new FileWriter(myFilePath);
PrintWriter myFile = new PrintWriter(resultFile);
myFile.println(%%2);
myFile.flush();
resultFile.close();
}
catch (Exception e) {
System.out.println("新建文件操作出錯(cuò)");
e.printStackTrace();
}
3.刪除文件
//import java.io.*;
File myDelFile = new File(%%1);
try {
myDelFile.delete();
}
catch (Exception e) {
System.out.println("刪除文件操作出錯(cuò)");
e.printStackTrace();
}
4.刪除文件夾
/*
import java.io.*;
import java.util.*;
*/
LinkedList folderList = new LinkedList<String>();
folderList.add(%%1);
while (folderList.size() > 0) {
File file = new File(folderList.poll());
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
fileList.add(files[i]);
}
}
for (File f : fileList) {
f.delete();
}
}
folderList = new LinkedList<String>();
folderList.add(%%1);
while (folderList.size() > 0) {
File file = new File(folderList.getLast());
if (file.delete()) {
folderList.removeLast();
} else {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
folderList.add(files[i].getPath());
}
}
}
5.刪除一個(gè)文件下夾所有的文件夾
/*
import java.io.*;
private static LinkedList<String> folderList=null;
*/
File delfile=new File(%%1);
File[] files=delfile.listFiles();
for(int i=0;i<files.length;i++){
if(files[i].isDirectory()){
if(!files[i].delete()){
folderList = new LinkedList<String>();
folderList.add(files[i]);
while (folderList.size() > 0) {
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· 2009-10-23 21:56
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2樓
File file = new File(folderList.poll());
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
fileList.add(files[i]);
}
}
for (File f : fileList) {
f.delete();
}
}
folderList = new LinkedList<String>();
folderList.add(files[i]);
while (folderList.size() > 0) {
File file = new File(folderList.getLast());
if (file.delete()) {
folderList.removeLast();
} else {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
folderList.add(files[i].getPath());
}
}
}
}
}
}
6.清空文件夾
//import java.io.*;
File delfilefolder=new File(%%1);
try {
if (!delfilefolder.exists() && !delfilefolder.delete()){
LinkedList folderList = new LinkedList<String>();
folderList.add(delfilefolder);
while (folderList.size() > 0) {
File file = new File(folderList.poll());
File[] files = file.listFiles();
ArrayList<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
fileList.add(files[i]);
}
}
for (File f : fileList) {
f.delete();
}
}
folderList = new LinkedList<String>();
folderList.add(delfilefolder);
while (folderList.size() > 0) {
File file = new File(folderList.getLast());
if (file.delete()) {
folderList.removeLast();
} else {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
folderList.add(files[i].getPath());
}
}
}
}
delfilefolder.mkdir();
}
catch (Exception e) {
System.out.println("清空目錄操作出錯(cuò)");
e.printStackTrace();
}
7.讀取文件
//import java.io.*;
// 逐行讀取數(shù)據(jù)
FileReader fr = new FileReader(%%1);
BufferedReader br = new BufferedReader(fr);
String %%2 = br.readLine();
while (%%2 != null) {
%%3
%%2 = br.readLine();
}
br.close();
fr.close();
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· 2009-10-23 21:56
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· 
· 無尾獸零號(hào)機(jī)
· 4位粉絲
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3樓
9.寫入隨機(jī)文件
//import java.io.*;
try {
RandomAcessFile logFile=new RandomAcessFile(%%1,"rw");
long lg=logFile.length();
logFile.seek(%%2);
logFile.writeByte(%%3);
}catch(IOException ioe){
System.out.println("無法寫入文件："+ioe.getMessage());
}
10.讀取文件屬性
//import java.io.*;
// 文件屬性的取得
File af = new File(%%1);
if (af.exists()) {
System.out.println(f.getName() + "的屬性如下： 文件長(zhǎng)度為：" + f.length());
System.out.println(f.isFile() ? "是文件" : "不是文件");
System.out.println(f.isDirectory() ? "是目錄" : "不是目錄");
System.out.println(f.canRead() ? "可讀取" : "不");
System.out.println(f.canWrite() ? "是隱藏文件" : "");
System.out.println("文件夾的最后修改日期為：" + new Date(f.lastModified()));
} else {
System.out.println(f.getName() + "的屬性如下：");
System.out.println(f.isFile() ? "是文件" : "不是文件");
System.out.println(f.isDirectory() ? "是目錄" : "不是目錄");
System.out.println(f.canRead() ? "可讀取" : "不");
System.out.println(f.canWrite() ? "是隱藏文件" : "");
System.out.println("文件的最后修改日期為：" + new Date(f.lastModified()));
}
if(f.canRead()){
%%2
}
if(f.canWrite()){
%%3
}
11.寫入屬性
//import java.io.*;
File filereadonly=new File(%%1);
try {
boolean b=filereadonly.setReadOnly();
}
catch (Exception e) {
System.out.println("拒絕寫訪問："+e.printStackTrace());
}
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· 2009-10-24 15:19
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· 
· 無尾獸零號(hào)機(jī)
· 4位粉絲
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4樓
8.寫入文件
//import java.io.*;
// 將數(shù)據(jù)寫入文件
try {
FileWriter fw = new FileWriter(%%1);
fw.write(%%2);
fw.flush();
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
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· 2009-10-24 15:19
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· 
· 無尾獸零號(hào)機(jī)
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5樓
12.枚舉一個(gè)文件夾中的所有文件
/*
import java.io.*;
import java.util.*;
*/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
while (folderList.size() > 0) {
File file = new File(folderList.poll());
File[] files = file.listFiles();
List<File> fileList = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
folderList.add(files[i].getPath());
} else {
fileList.add(files[i]);
}
}
for (File f : fileList) {
%%2=f.getAbsoluteFile();
%%3
}
}
13.復(fù)制文件夾
/*
import java.io.*;
import java.util.*;
*/
LinkedList<String> folderList = new LinkedList<String>();
folderList.add(%%1);
LinkedList<String> folderList2 = new LinkedList<String>();
folderList2.add(%%2+ %%1.substring(%%1.lastIndexOf("\\")));
while (folderList.size() > 0) {
(new File(folderList2.peek())).mkdirs(); // 如果文件夾不存在 則建立新文件夾
File folders = new File(folderList.peek());
String[] file = folders.list();
File temp = null;
try {
for (int i = 0; i < file.length; i++) {
if (folderList.peek().endsWith(File.separator)) {
temp = new File(folderList.peek() + File.separator
+ file[i]);
} else {
temp = new File(folderList.peek() + File.separator
+ file[i]);
}
if (temp.isFile()) {
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(
folderList2.peek() + File.separator
+ (temp.getName()).toString());
byte[] b = new byte[5120];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
if (temp.isDirectory()) {// 如果是子文件夾
for (File f : temp.listFiles()) {
if (f.isDirectory()) {
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
+ File.separator + f.getName());
}
}
}
}
} catch (Exception e) {
//System.out.println("復(fù)制整個(gè)文件夾內(nèi)容操作出錯(cuò)");
e.printStackTrace();
}
folderList.removeFirst();
folderList2.removeFirst();
}
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· 2009-10-24 15:19
· 回復(fù)
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· 
· 無尾獸零號(hào)機(jī)
· 4位粉絲
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6樓
14.復(fù)制一個(gè)目錄下所有的文件夾到另一個(gè)文件夾下
/*
import java.io.*;
import java.util.*;
*/
File copyfolders=new File(%%1);
File[] copyfoldersList=copyfolders.listFiles();
for(int k=0;k<copyfoldersList.length;k++){
if(copyfoldersList[k].isDirectory()){
List<String>folderList=new ArrayList<String>();
folderList.add(copyfoldersList[k].getPath());
List<String>folderList2=new ArrayList<String>();
folderList2.add(%%2+"/"+copyfoldersList[k].getName());
for(int j=0;j<folderList.size();j++){
(new File(folderList2.get(j))).mkdirs(); //如果文件夾不存在 則建立新文件夾
File folders=new File(folderList.get(j));
String[] file=folders.list();
File temp=null;
try {
for (int i = 0; i < file.length; i++) {
if(folderList.get(j).endsWith(File.separator)){
temp=new File(folderList.get(j)+File.separator+file[i]);
}
else{
temp=new File(folderList.get(j)+File.separator+file[i]);
}
FileInputStream input = new FileInputStream(temp);
if(temp.isFile()){
FileOutputStream output = new FileOutputStream(folderList2.get(j) + File.separator +
(temp.getName()).toString());
byte[] b = new byte[5120];
int len;
while ( (len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
if(temp.isDirectory()){//如果是子文件夾
folderList.add(folderList.get(j)+"/"+file[i]);
folderList2.add(folderList2.get(j)+"/"+file[i]);
}
}
}
catch (Exception e) {
System.out.println("復(fù)制整個(gè)文件夾內(nèi)容操作出錯(cuò)");
e.printStackTrace();
}
}
}
}
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· 2009-10-24 15:20
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· 無尾獸零號(hào)機(jī)
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7樓
43.ZIP壓縮文件夾
/*
import java.io.*;
import java.util.*;
import java.util.zip.*;
*/
public static String zipFileProcess(ArrayList outputZipFileNameList, String outputZipNameAndPath) {
ArrayList fileNames = new ArrayList();
ArrayList files = new ArrayList();
FileOutputStream fileOut = null;
ZipOutputStream outputStream = null;
FileInputStream fileIn = null;
StringBuffer sb = new StringBuffer(outputZipNameAndPath);
// FileInputStream fileIn =null;
try {
if (outputZipNameAndPath.indexOf(".zip") != -1) {
outputZipNameAndPath = outputZipNameAndPath;
} else {
sb.append(".zip");
outputZipNameAndPath = sb.toString();
}
fileOut = new FileOutputStream(outputZipNameAndPath);
outputStream = new ZipOutputStream(fileOut);
int outputZipFileNameListSize = 0;
if (outputZipFileNameList != null) {
outputZipFileNameListSize = outputZipFileNameList.size();
}
for (int i = 0; i < outputZipFileNameListSize; i++) {
File rootFile = new File(outputZipFileNameList.get(i).toString());
listFile(rootFile, fileNames, files, "");
}
for (int loop = 0; loop < files.size(); loop++) {
fileIn = new FileInputStream((File) files.get(loop));
outputStream.putNextEntry(new ZipEntry((String) fileNames.get(loop)));
byte[] buffer = new byte[1024];
while (fileIn.read(buffer) != -1) {
outputStream.write(buffer);
}
outputStream.closeEntry();
fileIn.close();
}
return outputZipNameAndPath;
} catch (IOException ioe) {
return null;
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
}
}
if (fileIn != null) {
try {
fileIn.close();
} catch (IOException e) {
}
}
}
}
private static void listFile(File parentFile, List nameList, List fileList, String directoryName) {
if (parentFile.isDirectory()) {
File[] files = parentFile.listFiles();
for (int loop = 0; loop < files.length; loop++) {
listFile(files[loop], nameList, fileList, directoryName + parentFile.getName() + "/");
}
} else {
fileList.add(parentFile);
nameList.add(directoryName + parentFile.getName());
}
}
ArrayList outputZipFileName=new ArrayList();
String savePath="";
int argSize = 0;
savePath = %%1;
outputZipFileName.add(%%2);
ZipFileOther instance=new ZipFileOther();
instance.zipFileProcess(outputZipFileName,savePath);
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import java.io.*;
public class FileOperate {
public FileOperate() {
}
/**
* 新建目錄
* @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("新建目錄操作出錯(cuò)");
e.printStackTrace();
}
}
/**
* 新建文件
* @param filePathAndName String 文件路徑及名稱 如c:/fqf.txt
* @param fileContent String 文件內(nèi)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("新建目錄操作出錯(cuò)");
e.printStackTrace();
}
}
/**
* 刪除文件
* @param filePathAndName String 文件路徑及名稱 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("刪除文件操作出錯(cuò)");
e.printStackTrace();
}
}
/**
* 刪除文件夾
* @param filePathAndName String 文件夾路徑及名稱 如c:/fqf
* @param fileContent String
* @return boolean
*/
public void delFolder(String folderPath) {
try {
delAllFile(folderPath); //刪除完里面所有內(nèi)容
String filePath = folderPath;
filePath = filePath.toString();
java.io.File myFilePath = new java.io.File(filePath);
myFilePath.delete(); //刪除空文件夾
}
catch (Exception e) {
System.out.println("刪除文件夾操作出錯(cuò)");
e.printStackTrace();
}
}
/**
* 刪除文件夾里面的所有文件
* @param path String 文件夾路徑 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]);//先刪除文件夾里面的文件
delFolder(path+"/"+ tempList[i]);//再刪除空文件夾
}
}
}
/**
* 復(fù)制單個(gè)文件
* @param oldPath String 原文件路徑 如：c:/fqf.txt
* @param newPath String 復(fù)制后路徑 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()) { //文件存在時(shí)
InputStream inStream = new FileInputStream(oldPath); //讀入原文件
FileOutputStream fs = new FileOutputStream(newPath);
byte[] buffer = new byte[1444];
int length;
while ( (byteread = inStream.read(buffer)) != -1) {
bytesum += byteread; //字節(jié)數(shù) 文件大小
System.out.println(bytesum);
fs.write(buffer, 0, byteread);
}
inStream.close();
}
}
catch (Exception e) {
System.out.println("復(fù)制單個(gè)文件操作出錯(cuò)");
e.printStackTrace();
}
}
/**
* 復(fù)制整個(gè)文件夾內(nèi)容
* @param oldPath String 原文件路徑 如：c:/fqf
* @param newPath String 復(fù)制后路徑 如：f:/fqf/ff
* @return boolean
*/
public void copyFolder(String oldPath, String newPath) {
try {
(new File(newPath)).mkdirs(); //如果文件夾不存在 則建立新文件夾
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()){//如果是子文件夾
copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
}
}
}
catch (Exception e) {
System.out.println("復(fù)制整個(gè)文件夾內(nèi)容操作出錯(cuò)");
e.printStackTrace();
}
}
/**
* 移動(dòng)文件到指定目錄
* @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);
}
/**
* 移動(dòng)文件到指定目錄
* @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);
}
}
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