I asked a question earlier about extracting RAR archives in Java and someone pointed me to JUnrar. The official site is down but it seems to be quite widely used as I found a lot of discussions about it online.
Could someone show me how to use JUnrar to extract all the files in an archive? I found a little snippet online but it doesn't seem to work. It shows each item in the archive to be a directory even if it is a file.
Archive rar = new Archive(new File("C://Weather_Icons.rar"));
FileHeader fh = rar.nextFileHeader();
while(fh != null){
if (fh.isDirectory()) {
logger.severe("directory: " + fh.getFileNameString() );
}
//File out = new File(fh.getFileNameString());
//FileOutputStream os = new FileOutputStream(out);
//rar.extractFile(fh, os);
//os.close();
fh=rar.nextFileHeader();
}
Thanks.
May be you should also check this snippet code. A copy of which can be found below.
public class MVTest {
/**
* #param args
*/
public static void main(String[] args) {
String filename = "/home/rogiel/fs/home/movies/vp.mp3.part1.rar";
File f = new File(filename);
Archive a = null;
try {
a = new Archive(new FileVolumeManager(f));
} catch (RarException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (a != null) {
a.getMainHeader().print();
FileHeader fh = a.nextFileHeader();
while (fh != null) {
try {
File out = new File("/home/rogiel/fs/test/"
+ fh.getFileNameString().trim());
System.out.println(out.getAbsolutePath());
FileOutputStream os = new FileOutputStream(out);
a.extractFile(fh, os);
os.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (RarException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
fh = a.nextFileHeader();
}
}
}
}
Related
I have created a program to convert text to xml by using ReverseXSL API.
This program is to be executed by an application by calling static method (static int transformXSL).
I am able to execute and produce output with running from Eclipse. However, When I ran program (jar) by using application it stuck somewhere and I couldnt find anything.
Then, I debugged by "Debug as...-> Remote Java Application" in Eclipse from Application and found "InvocationTargetException" at ClassLoaders.callStaticFunction.
Below Static method is called by application.
public class MyTest4 {
public MyTest4()
{
}
public static int transformXSL(String defFile, String inputFile, String XSLFile, String OutputFile) {
System.out.println("Dheeraj's method is called");
// start time
FileWriter fw=null;
try {
fw = new FileWriter("D://Countime.txt");
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
BufferedWriter output=new BufferedWriter(fw);
DateFormat sd=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
Date dt= new Date();
System.out.println("Date is calculated");
try {
output.write("Start Time:"+sd.format(dt).toString());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(sd.format(dt));
FileReader myDEFReader=null, myXSLReader=null;
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t=null;
FileInputStream inStream = null;
ByteArrayOutputStream outStream = null;
// Step 1:
//instantiate a transformer with the specified DEF and XSLT
if (new File(defFile).canRead())
{
try {
myDEFReader = new FileReader(defFile);
System.out.println("Definition file is read");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
else myDEFReader = null;
if (new File(XSLFile).canRead())
try {
myXSLReader = new FileReader(XSLFile);
System.out.println("XSL file is read");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
else myXSLReader = null;
try {
t = tf.newTransformer(myDEFReader, myXSLReader);
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("Step 1: DEF AND XSLT Transformation completed");
// Step 2:
// Read Input data
try {
inStream = new FileInputStream(inputFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
outStream = new ByteArrayOutputStream();
System.out.println("Step 2: Reading Input file: completed");
// Step 3:
// Transform Input
try {
try (BufferedReader br = new BufferedReader(new FileReader("D://2.txt"))) {
String line = null;
while ((line = br.readLine()) != null) {
System.out.println("Content: "+line);
}
}
System.out.println("File: "+inputFile.toString());
System.out.println("\n content: \n"+ inStream.toString());
System.out.println("Calling Transform Function");
t.transform(inStream, outStream);
System.out.println("Transformation is called");
outStream.close();
try(OutputStream outputStream = new FileOutputStream(OutputFile)) {
outStream.writeTo(outputStream);
System.out.println("Outstream is generated; Output file is creating");
}
System.out.println(outStream.toString());
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (FactoryConfigurationError e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerFactoryConfigurationError e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (javax.xml.transform.TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("output file is created");
// End time
Date dt2= new Date();
System.out.println(sd.format(dt2));
System.out.println("End time:"+dt2.toString());
try {
output.append("End Time:"+sd.format(dt2).toString());
output.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return 0;
}
}
How does this code delete the file I had and makes a new one??
public void actualizaJTextArea(String cliente){
mensagens.setText("");
Scanner scanner = null;
File file = createFile(cliente + "chatswith.txt");
try {
scanner = new Scanner(file);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
(...)
scanner.close();
}
public static File createFile(String s){
File file = new File(s);
if(!file.exists()){
try {
boolean b = file.createNewFile();
System.out.println(b);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return file;
}
Does the method createNewFile() do this?
Thanks and I'm sorry if this has been asked before I just can't find it.
EDIT
I am also using createFile() in here to write in it but the use is the same so i guess that can't be it:
public void recebeMensagem(boolean b){
while(true){
Mensagem m = null;
try {
m = (Mensagem)input.readObject();
System.out.println("Mensagem Recebida:"+m);
} catch (ClassNotFoundException e){
} catch (IOException e) {
try {
input.close();
System.out.println("Server desligou...");
break;
} catch (IOException e1) {
}
}
if(m != null){
for(Mensagens mensagens:v){
for(String string: m.getReceivers()){
if (mensagens.getCliente().equals(m.getAuthor()) && mensagens.getContacto().equals(string)){
mensagens.actualizaJTextArea(cliente);
}
}
}
for(String Str :m.getReceivers()){
PrintWriter p = null;
File file = Mensagens.createFile(cliente + "chatswith.txt");
try {
p = new PrintWriter(new FileWriter(file));
p.append(m.getAuthor()+"</<"+Str+"</<"+m.getText()+"\n");
p.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
createNewFile() is atomic and it will not delete the file if it is present. Please look at the boolean output, it should be false if your file exists already.
EDIT
add append parameter to FileWriter. It is overwriting every time.
FROM
p = new PrintWriter(new FileWriter(file));
TO
p = new PrintWriter(new FileWriter(file,true));
I am trying to convert large 3gp file(>than 25mb) to byte array but it gives outofmemory exception.i am able to convert less than 25 mb 3gp file to bytearray.
File file1 = new File (Environment.getExternalStorageDirectory() + "1.3gp");
FileInputStream fis = null;
try {
fis = new FileInputStream(file1);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
while (fis.available() > 0) {
bos.write(fis.read());
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
byte[] bytes = bos.toByteArray();
File someFile = new File (Environment.getExternalStorageDirectory()+ "/output.txt");
FileOutputStream fos = null;
try {
fos = new FileOutputStream(someFile);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
fos.write(bytes);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
fos.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
fos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
////
how to convert the large 3gp file into bytearray.
give a proper example or method.
Set the -Xmx option on the virtual machine being used to run the program to a larger value to give it more memory to work with.
You can do that as a command line option if running the program directly, or as a setting on the project in your IDE if running it from an IDE.
This question already has answers here:
Loading html file to webview on android from assets folder using Android Studio
(3 answers)
Closed 5 years ago.
try {
File f = new File( "file:///android_asset/[2011]011TAXMANN.COM00167(PATNA)") ;
FileInputStream fis= new FileInputStream(f);
System.out.println("_______YOUR HTML CONTENT CODE IS BELLOW WILL BE PRINTED IN 2 SECOND _______");
Thread.sleep(2000);
int ch;
while((ch=fis.read())!=-1)
{
fileContent=fileContent+(char)ch; // here i stored the content of .Html file in fileContent variable
}
System.out.print(fileContent);
//}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
This is my code. I want to read html content from asstes folder my file is available in asstes folder But it gives exception FileNotFoundException. So plz any one tell me how to read html content from asstes folder in android?
File f = new File( "file:///android_asset/[2011]011TAXMANN.COM00167(PATNA)") ;
when i debug f gives= file:/android_asset/[2011]011TAXMANN.COM00167(PATNA)
plz tell me how to get corrct directory and where i m doing wrong it shud me coming file:///android_asset/[2011]011TAXMANN.COM00167(PATNA)
This is the way to load HTML file from assets in WebView
webview.loadUrl("file:///android_asset/Untitled-1.html");
Untitled-1.html---File name that should be save first as .html extension
Edited
try this link
http://developer.android.com/reference/android/content/res/AssetManager.html
there is method from this doc
public final String[] list (String path)
You cat get InputStream by this code:
getResources().getAssets().open("you_file_name_goes_here");
you don't want to use
webview.loadUrl('file:///android_asset/htmlFile.html');
right?
try this i found it in a blog:
static String getHTMLDataBuffer(String url,Context context) {
InputStream htmlStream;
try {
if (Utils.isReferExternalMemory() && url.contains("sdcard")) {
String tempPath = url.substring(7, url.length());//remove file:// from the url
File file = new File(tempPath);
htmlStream = new FileInputStream(file);
}else{
String tempPath = url.replace("file:///android_asset/", "");
htmlStream = context.getAssets().open(tempPath);
}
Reader is = null;
try {
is = new BufferedReader(new InputStreamReader(htmlStream, "UTF8"));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// read string from reader
final char[] buffer = new char[1024];
StringBuilder out = new StringBuilder();
int read;
do {
read = is.read(buffer, 0, buffer.length);
if (read>0) {
out.append(buffer, 0, read);
}
} while (read>=0);
return out.toString();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
usage:
String data = getHTMLDataBuffer("file:///android_asset/yourHtmlFile",this);
webview.loadDataWithBaseURL("http://example.com", data, "text/html", "utf-8", null);
Sorry for my bad english :)
I'm trying to save a url as a string so that I can use it in another part of my app but its not working properly. Here's what I have.
Saving
String FILENAME = "usertimetable";
String string = mWebView.getOriginalUrl();
FileOutputStream fos = null;
try {
fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos.write(string.getBytes());
fos.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Opening
FileInputStream fis = null;
try {
fis = openFileInput("usertimetable");
url = fis.toString();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Try using the read() method, rather than toString().
(http://developer.android.com/reference/java/io/FileInputStream.html for more info.)