Java Utililty Methods FileInputStream Read

List of utility methods to do FileInputStream Read

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Description

The list of methods to do FileInputStream Read are organized into topic(s).

Method

voidreadFile(String path, String root, OutputStream out)
Dump the contents of the given path (relative to the root) to the output stream. 
File rootDir = new File(root);
while (path.startsWith("/") && (path.length() > 0))
    path = path.substring(1);
if (path.length() <= 0)
    throw new FileNotFoundException("Not serving up the root dir");
File target = new File(rootDir, path);
if (!target.exists())
    throw new FileNotFoundException("Requested file does not exist: " + path);
...
StringreadFile(String pPathToFile)
Read a file and return the content. 
StringBuffer out = new StringBuffer();
FileInputStream inputStrem = new FileInputStream(new File(pPathToFile));
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte buf[] = new byte[1024];
int len;
while ((len = inputStrem.read(buf)) > 0) {
    outStream.write(buf, 0, len);
    out.append(outStream.toString());
...
StringreadFile(String resource)
read File 
FileInputStream in = new FileInputStream(resource);
if (in == null) {
    throw new FileNotFoundException(resource);
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len;
while ((len = in.read(buffer)) > 0) {
...
StringBufferreadFile(String sFileName)
Legge un file 
int nI = 0;
byte buf[] = new byte[4096];
StringBuffer sHold = new StringBuffer();
BufferedInputStream bfin = null;
try {
    bfin = new BufferedInputStream(new FileInputStream(sFileName));
    while ((nI = bfin.read(buf)) != -1) {
        if (nI != -1)
...
StringreadFileAsBinary(File file)
read File As Binary 
StringBuffer stringBuffer = new StringBuffer();
BufferedInputStream input = null;
try {
    input = new BufferedInputStream(new FileInputStream(file));
    int read = 0;
    byte[] buffer = new byte[1024];
    while ((read = input.read(buffer)) != -1)
        stringBuffer.append(read);
...
FileInputStreamreadFileAsInputStream(File file)
Read a file as FileInputStream. 
try {
    return new FileInputStream(file);
} catch (FileNotFoundException e) {
    return null;
InputStreamreadFileAsInputStream(String fileName)
Reads the file corresponding to the passed file name. 
if (fileName == null)
    throw new IllegalArgumentException("No file name specified.");
File f = new File(fileName);
FileInputStream input = null;
try {
    input = new FileInputStream(f);
    return new BufferedInputStream(input);
} catch (Exception e) {
...
PropertiesreadFileAsProperties(File file)
Uses the contents of a file to populate a Properties object. 
Properties properties = new Properties();
properties.load(new FileInputStream(file));
return properties;
InputStreamreadFileAsResource(String fileName)
read File As Resource 
InputStream f;
try {
    FileInputStream fis = new FileInputStream(fileName);
    f = fis;
} catch (FileNotFoundException ex) {
    f = new Object() {
    }.getClass().getEnclosingClass().getClassLoader().getResourceAsStream(fileName);
if (f == null) {
    throw new IOException("Cannot load file " + fileName);
return f;
StringReadFileAsUtf8String(String filePath)
Read File As Utf String 
final File file = new File(filePath);
final long fileLength = file.length();
if (fileLength > Integer.MAX_VALUE) {
    throw new IOException(filePath + " size is too large: " + fileLength);
final byte[] buffer = new byte[(int) fileLength];
final FileInputStream istream = new FileInputStream(file);
try {
...