27983dbe
 孙向锦
project init
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package com.sunvote.xpadapp.utils;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class FileUtil {
public static byte[] getByteArrayFromFile(String fileName) {
File file = null;
try {
file = new File(fileName);
} catch (Exception e) {
e.printStackTrace();
return null;
}
if (!file.exists() || !file.isFile() || !file.canRead()) {
return null;
}
int len = (int) file.length();
byte buffer[] = new byte[len];
try {
FileInputStream fis = new FileInputStream(file);
while (fis.read(buffer) > 0) {
}
fis.close();
} catch (Exception e) {
e.printStackTrace();
}
return buffer;
}
public static byte[] getByteArrayFromFile(File file) {
if (!file.exists() || !file.isFile() || !file.canRead()) {
return null;
}
int len = (int) file.length();
byte buffer[] = new byte[len];
try {
FileInputStream fis = new FileInputStream(file);
while (fis.read(buffer) > 0) {
}
fis.close();
} catch (Exception e) {
e.printStackTrace();
}
return buffer;
}
public static boolean saveByteArrayToFile(String fileName, byte[] data) {
boolean success = false;
if (null != fileName) {
String name = fileName;
int count = 0;
File file = new File(name);
while (file.exists()) {
count++;
name = fileName + count;
file = new File(name);
}
file.getParentFile().mkdirs();
try {
FileOutputStream fs = new FileOutputStream(fileName);
fs.write(data);
fs.close();
success = true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return success;
} else {
return success;
}
}
public static void deleteFile(File file) {
if(file == null){
return;
}
if (file.isFile()) {
file.delete();
return;
}
if (file.isDirectory()) {
File[] childFiles = file.listFiles();
if (childFiles == null || childFiles.length == 0) {
file.delete();
return;
}
for (int i = 0; i < childFiles.length; i++) {
deleteFile(childFiles[i]);
}
file.delete();
}
}
public static void deleteFileInDir(File file) {
if(file == null){
return;
}
if (file.isFile()) {
file.delete();
return;
}
if (file.isDirectory()) {
File[] childFiles = file.listFiles();
if (childFiles == null || childFiles.length == 0) {
return;
}
for (int i = 0; i < childFiles.length; i++) {
deleteFileInDir(childFiles[i]);
}
}
}
}
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