Example usage for java.io FileInputStream close

List of usage examples for java.io FileInputStream close

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Introduction

In this page you can find the example usage for java.io FileInputStream close.

Prototype

public void close() throws IOException

Source Link

Document

Closes this file input stream and releases any system resources associated with the stream.

Usage

From source file:edu.hawaii.soest.kilonalu.dvp2.DavisWxParser.java

public static void main(String[] args) {

    // Ensure we have a path to the binary file
    if (args.length != 1) {
        logger.info("Please provide the path to a file containing a binary LOOP packet.");
        System.exit(1);/*  w  w  w .j av  a2  s  .c  o m*/
    } else {
        try {
            // open and read the file
            File packetFile = new File(args[0]);
            FileInputStream fis = new FileInputStream(packetFile);
            FileChannel fileChannel = fis.getChannel();
            ByteBuffer inBuffer = ByteBuffer.allocateDirect(8192);
            ByteBuffer packetBuffer = ByteBuffer.allocateDirect(8192);

            while (fileChannel.read(inBuffer) != -1 || inBuffer.position() > 0) {
                inBuffer.flip();
                packetBuffer.put(inBuffer.get());
                inBuffer.compact();
            }
            fileChannel.close();
            fis.close();
            packetBuffer.put(inBuffer.get());

            // create an instance of the parser, and report the field contents after parsing
            DavisWxParser davisWxParser = new DavisWxParser(packetBuffer);

            // Set up a simple logger that logs to the console
            PropertyConfigurator.configure(davisWxParser.getLogConfigurationFile());

            logger.info("loopID:                         " + davisWxParser.getLoopID());
            logger.info("barTrend:                       " + davisWxParser.getBarTrend());
            logger.info("barTrendAsString:               " + davisWxParser.getBarTrendAsString());
            logger.info("packetType:                     " + davisWxParser.getPacketType());
            logger.info("nextRecord:                     " + davisWxParser.getNextRecord());
            logger.info("barometer:                      " + davisWxParser.getBarometer());
            logger.info("insideTemperature:              " + davisWxParser.getInsideTemperature());
            logger.info("insideHumidity:                 " + davisWxParser.getInsideHumidity());
            logger.info("outsideTemperature:             " + davisWxParser.getOutsideTemperature());
            logger.info("windSpeed:                      " + davisWxParser.getWindSpeed());
            logger.info("tenMinuteAverageWindSpeed:      " + davisWxParser.getTenMinuteAverageWindSpeed());
            logger.info("windDirection:                  " + davisWxParser.getWindDirection());
            logger.info(
                    "extraTemperatures:              " + Arrays.toString(davisWxParser.getExtraTemperatures()));
            logger.info(
                    "soilTemperatures:               " + Arrays.toString(davisWxParser.getSoilTemperatures()));
            logger.info(
                    "leafTemperatures:               " + Arrays.toString(davisWxParser.getLeafTemperatures()));
            logger.info("outsideHumidity:                " + davisWxParser.getOutsideHumidity());
            logger.info(
                    "extraHumidities:                " + Arrays.toString(davisWxParser.getExtraHumidities()));
            logger.info("rainRate:                       " + davisWxParser.getRainRate());
            logger.info("uvRadiation:                    " + davisWxParser.getUvRadiation());
            logger.info("solarRadiation:                 " + davisWxParser.getSolarRadiation());
            logger.info("stormRain:                      " + davisWxParser.getStormRain());
            logger.info("currentStormStartDate:          " + davisWxParser.getCurrentStormStartDate());
            logger.info("dailyRain:                      " + davisWxParser.getDailyRain());
            logger.info("monthlyRain:                    " + davisWxParser.getMonthlyRain());
            logger.info("yearlyRain:                     " + davisWxParser.getYearlyRain());
            logger.info("dailyEvapoTranspiration:        " + davisWxParser.getDailyEvapoTranspiration());
            logger.info("monthlyEvapoTranspiration:      " + davisWxParser.getMonthlyEvapoTranspiration());
            logger.info("yearlyEvapoTranspiration:       " + davisWxParser.getYearlyEvapoTranspiration());
            logger.info("soilMoistures:                  " + Arrays.toString(davisWxParser.getSoilMoistures()));
            logger.info("leafWetnesses:                  " + Arrays.toString(davisWxParser.getLeafWetnesses()));
            logger.info("insideAlarm:                    " + davisWxParser.getInsideAlarm());
            logger.info("rainAlarm:                      " + davisWxParser.getRainAlarm());
            logger.info("outsideAlarms:                  " + davisWxParser.getOutsideAlarms());
            logger.info("extraTemperatureHumidityAlarms: " + davisWxParser.getExtraTemperatureHumidityAlarms());
            logger.info("soilLeafAlarms:                 " + davisWxParser.getSoilLeafAlarms());
            logger.info("transmitterBatteryStatus:       " + davisWxParser.getTransmitterBatteryStatus());
            logger.info("consoleBatteryVoltage:          " + davisWxParser.getConsoleBatteryVoltage());
            logger.info("forecastIconValues:             " + davisWxParser.getForecastAsString());
            logger.info("forecastRuleNumber:             " + davisWxParser.getForecastRuleNumberAsString());
            logger.info("timeOfSunrise:                  " + davisWxParser.getTimeOfSunrise());
            logger.info("timeOfSunset:                   " + davisWxParser.getTimeOfSunset());
            logger.info("recordDelimiter:                " + davisWxParser.getRecordDelimiterAsHexString());
            logger.info("crcChecksum:                    " + davisWxParser.getCrcChecksum());

        } catch (java.io.FileNotFoundException fnfe) {
            fnfe.printStackTrace();

        } catch (java.io.IOException ioe) {
            ioe.printStackTrace();

        }

    }
}

From source file:it.polimi.tower4clouds.rules.batch.BatchTool.java

public static void main(String[] args) {
    Options options = buildOptions();//from   w w  w  . ja v  a 2 s. co m
    CommandLineParser parser = new BasicParser();
    HelpFormatter formatter = new HelpFormatter();
    FileInputStream inputFile = null;
    try {
        // parse the command line arguments
        CommandLine cmd = parser.parse(options, args);
        if (cmd.getOptions().length != 1) {
            System.err.println("Parsing failed: Reason: one and only one option is required");
            formatter.printHelp("qos-models", options);
        } else if (cmd.hasOption("h")) {
            formatter.printHelp("qos-models", options);
        } else if (cmd.hasOption("v")) {
            String file = cmd.getOptionValue("v");
            inputFile = new FileInputStream(file);
            MonitoringRules rules = XMLHelper.deserialize(inputFile, MonitoringRules.class);
            RulesValidator validator = new RulesValidator();
            Set<Problem> problems = validator.validateAllRules(rules);
            printResult(problems);
        } else if (cmd.hasOption("c")) {
            String file = cmd.getOptionValue("c");
            inputFile = new FileInputStream(file);
            Constraints constraints = XMLHelper.deserialize(inputFile, Constraints.class);
            QoSValidator validator = new QoSValidator();
            Set<Problem> problems = validator.validateAllConstraints(constraints);
            printResult(problems);
        } else if (cmd.hasOption("r")) {
            String file = cmd.getOptionValue("r");
            inputFile = new FileInputStream(file);
            Constraints constraints = XMLHelper.deserialize(inputFile, Constraints.class);
            MonitoringRuleFactory factory = new MonitoringRuleFactory();
            MonitoringRules rules = factory.makeRulesFromQoSConstraints(constraints);
            XMLHelper.serialize(rules, System.out);
        }
    } catch (ParseException e) {
        System.err.println("Parsing failed.  Reason: " + e.getMessage());
        formatter.printHelp("qos-models", options);
    } catch (FileNotFoundException e) {
        System.err.println("Could not locate input file: " + e.getMessage());
    } catch (JAXBException | SAXException e) {
        System.err.println("Input file could not be parsed: ");
        e.printStackTrace();
    } catch (Exception e) {
        System.err.println("Unknown error: ");
        e.printStackTrace();
    } finally {
        if (inputFile != null) {
            try {
                inputFile.close();
            } catch (IOException e) {
            }
        }
    }
}

From source file:me.mast3rplan.phantombot.PhantomBot.java

public static void main(String[] args) throws IOException {
    /* List of properties that must exist. */
    String requiredProperties[] = new String[] { "oauth", "channel", "owner", "user" };
    String requiredPropertiesErrorMessage = "";

    /* Properties configuration */
    Properties startProperties = new Properties();

    /* Indicates that the botlogin.txt file should be overwritten/created. */
    Boolean changed = false;/*w ww .  ja v a 2  s. c  om*/

    /* Print the user dir */
    com.gmt2001.Console.out.println("The working directory is: " + System.getProperty("user.dir"));

    /* Load up the bot info from the bot login file */
    try {
        if (new File("./botlogin.txt").exists()) {
            try {
                FileInputStream inputStream = new FileInputStream("botlogin.txt");
                startProperties.load(inputStream);
                inputStream.close();

                if (startProperties.getProperty("debugon", "false").equals("true")) {
                    com.gmt2001.Console.out.println("Debug Mode Enabled via botlogin.txt");
                    PhantomBot.enableDebugging = true;
                }

                if (startProperties.getProperty("debuglog", "false").equals("true")) {
                    com.gmt2001.Console.out.println("Debug Log Only Mode Enabled via botlogin.txt");
                    PhantomBot.enableDebugging = true;
                    PhantomBot.enableDebuggingLogOnly = true;
                }

                if (startProperties.getProperty("reloadscripts", "false").equals("true")) {
                    com.gmt2001.Console.out.println("Enabling Script Reloading");
                    PhantomBot.reloadScripts = true;
                }
                if (startProperties.getProperty("rhinodebugger", "false").equals("true")) {
                    com.gmt2001.Console.out.println("Rhino Debugger will be launched if system supports it.");
                    PhantomBot.enableRhinoDebugger = true;
                }
            } catch (IOException ex) {
                com.gmt2001.Console.err.printStackTrace(ex);
            }
        } else {

            /* Fill in the Properties object with some default values. Note that some values are left 
             * unset to be caught in the upcoming logic to enforce settings.
             */
            startProperties.setProperty("baseport", "25000");
            startProperties.setProperty("usehttps", "false");
            startProperties.setProperty("webenable", "true");
            startProperties.setProperty("msglimit30", "18.75");
            startProperties.setProperty("musicenable", "true");
            startProperties.setProperty("whisperlimit60", "60.0");
        }
    } catch (Exception ex) {
        com.gmt2001.Console.err.printStackTrace(ex);
    }

    /* Check to see if there's a webOauth set */
    if (startProperties.getProperty("webauth") == null) {
        startProperties.setProperty("webauth", generateWebAuth());
        com.gmt2001.Console.debug.println("New webauth key has been generated for botlogin.txt");
        changed = true;
    }
    /* Check to see if there's a webOAuthRO set */
    if (startProperties.getProperty("webauthro") == null) {
        startProperties.setProperty("webauthro", generateWebAuth());
        com.gmt2001.Console.debug.println("New webauth read-only key has been generated for botlogin.txt");
        changed = true;
    }
    /* Check to see if there's a panelUsername set */
    if (startProperties.getProperty("paneluser") == null) {
        com.gmt2001.Console.debug.println(
                "No Panel Username, using default value of 'panel' for Control Panel and YouTube Player");
        startProperties.setProperty("paneluser", "panel");
        changed = true;
    }
    /* Check to see if there's a panelPassword set */
    if (startProperties.getProperty("panelpassword") == null) {
        com.gmt2001.Console.debug.println(
                "No Panel Password, using default value of 'panel' for Control Panel and YouTube Player");
        startProperties.setProperty("panelpassword", "panel");
        changed = true;
    }
    /* Check to see if there's a youtubeOAuth set */
    if (startProperties.getProperty("ytauth") == null) {
        startProperties.setProperty("ytauth", generateWebAuth());
        com.gmt2001.Console.debug.println("New YouTube websocket key has been generated for botlogin.txt");
        changed = true;
    }
    /* Check to see if there's a youtubeOAuthThro set */
    if (startProperties.getProperty("ytauthro") == null) {
        startProperties.setProperty("ytauthro", generateWebAuth());
        com.gmt2001.Console.debug
                .println("New YouTube read-only websocket key has been generated for botlogin.txt");
        changed = true;
    }

    /* Make a new botlogin with the botName, oauth or channel is not found */
    if (startProperties.getProperty("user") == null || startProperties.getProperty("oauth") == null
            || startProperties.getProperty("channel") == null) {
        try {
            com.gmt2001.Console.out.print("\r\n");
            com.gmt2001.Console.out.print("Welcome to the PhantomBot setup process!\r\n");
            com.gmt2001.Console.out
                    .print("If you have any issues please report them on our forum or Tweet at us!\r\n");
            com.gmt2001.Console.out.print("Forum: https://community.phantombot.tv/\r\n");
            com.gmt2001.Console.out.print("Twitter: https://twitter.com/phantombotapp/\r\n");
            com.gmt2001.Console.out.print("PhantomBot Knowledgebase: https://docs.phantombot.tv/\r\n");
            com.gmt2001.Console.out.print("PhantomBot WebPanel: https://docs.phantombot.tv/kb/panel/\r\n");
            com.gmt2001.Console.out.print("\r\n");
            com.gmt2001.Console.out.print("\r\n");

            com.gmt2001.Console.out.print("1. Please enter the bot's Twitch username: ");
            startProperties.setProperty("user", System.console().readLine().trim());

            com.gmt2001.Console.out.print("\r\n");
            com.gmt2001.Console.out
                    .print("2. You will now need a OAuth token for the bot to be able to chat.\r\n");
            com.gmt2001.Console.out.print(
                    "Please note, this OAuth token needs to be generated while you're logged in into the bot's Twitch account.\r\n");
            com.gmt2001.Console.out.print(
                    "If you're not logged in as the bot, please go to https://twitch.tv/ and login as the bot.\r\n");
            com.gmt2001.Console.out.print("Get the bot's OAuth token here: https://twitchapps.com/tmi/\r\n");
            com.gmt2001.Console.out.print("Please enter the bot's OAuth token: ");
            startProperties.setProperty("oauth", System.console().readLine().trim());

            com.gmt2001.Console.out.print("\r\n");
            com.gmt2001.Console.out.print(
                    "3. You will now need your channel OAuth token for the bot to be able to change your title and game.\r\n");
            com.gmt2001.Console.out.print(
                    "Please note, this OAuth token needs to be generated while you're logged in into your caster account.\r\n");
            com.gmt2001.Console.out.print(
                    "If you're not logged in as the caster, please go to https://twitch.tv/ and login as the caster.\r\n");
            com.gmt2001.Console.out.print("Get the your OAuth token here: https://phantombot.tv/oauth/\r\n");
            com.gmt2001.Console.out.print("Please enter your OAuth token: ");
            startProperties.setProperty("apioauth", System.console().readLine().trim());

            com.gmt2001.Console.out.print("\r\n");
            com.gmt2001.Console.out
                    .print("4. Please enter the name of the Twitch channel the bot should join: ");
            startProperties.setProperty("channel", System.console().readLine().trim());

            com.gmt2001.Console.out.print("\r\n");
            com.gmt2001.Console.out.print("5. Please enter a custom username for the web panel: ");
            startProperties.setProperty("paneluser", System.console().readLine().trim());

            com.gmt2001.Console.out.print("\r\n");
            com.gmt2001.Console.out.print("6. Please enter a custom password for the web panel: ");
            startProperties.setProperty("panelpassword", System.console().readLine().trim());

            changed = true;
            newSetup = true;
        } catch (NullPointerException ex) {
            com.gmt2001.Console.err.printStackTrace(ex);
            com.gmt2001.Console.out.println("[ERROR] Failed to setup PhantomBot. Now exiting...");
            System.exit(0);
        }
    }

    /* Make sure the oauth has been set correctly */
    if (startProperties.getProperty("oauth") != null) {
        if (!startProperties.getProperty("oauth").startsWith("oauth")
                && !startProperties.getProperty("oauth").isEmpty()) {
            startProperties.setProperty("oauth", "oauth:" + startProperties.getProperty("oauth"));
            changed = true;
        }
    }

    /* Make sure the apiOAuth has been set correctly */
    if (startProperties.getProperty("apioauth") != null) {
        if (!startProperties.getProperty("apioauth").startsWith("oauth")
                && !startProperties.getProperty("apioauth").isEmpty()) {
            startProperties.setProperty("apioauth", "oauth:" + startProperties.getProperty("apioauth"));
            changed = true;
        }
    }

    /* Make sure the channelName does not have a # */
    if (startProperties.getProperty("channel").startsWith("#")) {
        startProperties.setProperty("channel", startProperties.getProperty("channel").substring(1));
        changed = true;
    } else if (startProperties.getProperty("channel").contains(".tv")) {
        startProperties.setProperty("channel", startProperties.getProperty("channel")
                .substring(startProperties.getProperty("channel").indexOf(".tv/") + 4).replaceAll("/", ""));
        changed = true;
    }

    /* Check for the owner after the channel check is done. */
    if (startProperties.getProperty("owner") == null) {
        if (startProperties.getProperty("channel") != null) {
            if (!startProperties.getProperty("channel").isEmpty()) {
                startProperties.setProperty("owner", startProperties.getProperty("channel"));
                changed = true;
            }
        }
    }

    /* Iterate the properties and delete entries for anything that does not have a 
     * value.
     */
    for (String propertyKey : startProperties.stringPropertyNames()) {
        if (startProperties.getProperty(propertyKey).isEmpty()) {
            changed = true;
            startProperties.remove(propertyKey);
        }
    }

    /* 
     * Check for required settings.
     */
    for (String requiredProperty : requiredProperties) {
        if (startProperties.getProperty(requiredProperty) == null) {
            requiredPropertiesErrorMessage += requiredProperty + " ";
        }
    }

    if (!requiredPropertiesErrorMessage.isEmpty()) {
        com.gmt2001.Console.err.println();
        com.gmt2001.Console.err.println("Missing Required Properties: " + requiredPropertiesErrorMessage);
        com.gmt2001.Console.err.println("Exiting PhantomBot");
        System.exit(0);
    }

    /* Check to see if anything changed */
    if (changed) {
        Properties outputProperties = new Properties() {
            @Override
            public synchronized Enumeration<Object> keys() {
                return Collections.enumeration(new TreeSet<>(super.keySet()));
            }
        };

        try {
            try (FileOutputStream outputStream = new FileOutputStream("botlogin.txt")) {
                outputProperties.putAll(startProperties);
                outputProperties.store(outputStream, "PhantomBot Configuration File");
            }
        } catch (IOException ex) {
            com.gmt2001.Console.err.printStackTrace(ex);
        }
    }

    /* Start PhantomBot */
    PhantomBot.instance = new PhantomBot(startProperties);
}

From source file:cht.Parser.java

public static void main(String[] args) throws IOException {

    // TODO get from google drive
    boolean isUnicode = false;
    boolean isRemoveInputFileOnComplete = false;
    int rowNum;//from   w w  w. j  av a 2 s  . c  om
    int colNum;
    Gson gson = new GsonBuilder().setPrettyPrinting().create();

    Properties prop = new Properties();

    try {
        prop.load(new FileInputStream("config.txt"));
    } catch (IOException ex) {
        ex.printStackTrace();
    }

    String inputFilePath = prop.getProperty("inputFile");
    String outputDirectory = prop.getProperty("outputDirectory");
    System.out.println(outputDirectory);
    // optional
    String unicode = prop.getProperty("unicode");
    String removeInputFileOnComplete = prop.getProperty("removeInputFileOnComplete");

    inputFilePath = inputFilePath.trim();
    outputDirectory = outputDirectory.trim();

    if (unicode != null) {
        isUnicode = Boolean.parseBoolean(unicode.trim());
    }
    if (removeInputFileOnComplete != null) {
        isRemoveInputFileOnComplete = Boolean.parseBoolean(removeInputFileOnComplete.trim());
    }

    Writer out = null;
    FileInputStream in = null;
    final String newLine = System.getProperty("line.separator").toString();
    final String separator = File.separator;
    try {
        in = new FileInputStream(inputFilePath);

        Workbook workbook = new XSSFWorkbook(in);

        Sheet sheet = workbook.getSheetAt(0);

        rowNum = sheet.getLastRowNum() + 1;
        colNum = sheet.getRow(0).getPhysicalNumberOfCells();

        for (int j = 1; j < colNum; ++j) {
            String outputFilename = sheet.getRow(0).getCell(j).getStringCellValue();
            // guess directory
            int slash = outputFilename.indexOf('/');
            if (slash != -1) { // has directory
                outputFilename = outputFilename.substring(0, slash) + separator
                        + outputFilename.substring(slash + 1);
            }

            String outputPath = FilenameUtils.concat(outputDirectory, outputFilename);
            System.out.println("--Writing " + outputPath);
            out = new OutputStreamWriter(new FileOutputStream(outputPath), "UTF-8");
            TreeMap<String, Object> map = new TreeMap<String, Object>();
            for (int i = 1; i < rowNum; i++) {
                try {
                    String key = sheet.getRow(i).getCell(0).getStringCellValue();
                    //String value = "";
                    Cell tmp = sheet.getRow(i).getCell(j);
                    if (tmp != null) {
                        // not empty string!
                        value = sheet.getRow(i).getCell(j).getStringCellValue();
                    }
                    if (!key.equals("") && !key.startsWith("#") && !key.startsWith(".")) {
                        value = isUnicode ? StringEscapeUtils.escapeJava(value) : value;

                        int firstdot = key.indexOf(".");
                        String keyName, keyAttribute;
                        if (firstdot > 0) {// a.b.c.d 
                            keyName = key.substring(0, firstdot); // a
                            keyAttribute = key.substring(firstdot + 1); // b.c.d
                            TreeMap oldhash = null;
                            Object old = null;
                            if (map.get(keyName) != null) {
                                old = map.get(keyName);
                                if (old instanceof TreeMap == false) {
                                    System.out.println("different type of key:" + key);
                                    continue;
                                }
                                oldhash = (TreeMap) old;
                            } else {
                                oldhash = new TreeMap();
                            }

                            int firstdot2 = keyAttribute.indexOf(".");
                            String rootName, childName;
                            if (firstdot2 > 0) {// c, d.f --> d, f
                                rootName = keyAttribute.substring(0, firstdot2);
                                childName = keyAttribute.substring(firstdot2 + 1);
                            } else {// c, d  -> d, null
                                rootName = keyAttribute;
                                childName = null;
                            }

                            TreeMap<String, Object> object = myPut(oldhash, rootName, childName);
                            map.put(keyName, object);

                        } else {// c, d  -> d, null
                            keyName = key;
                            keyAttribute = null;
                            // simple string mode
                            map.put(key, value);
                        }

                    }

                } catch (Exception e) {
                    // just ingore empty rows
                }

            }
            String json = gson.toJson(map);
            // output json
            out.write(json + newLine);
            out.close();
        }
        in.close();

        System.out.println("\n---Complete!---");
        System.out.println("Read input file from " + inputFilePath);
        System.out.println(colNum - 1 + " output files ate generated at " + outputDirectory);
        System.out.println(rowNum + " records are generated for each output file.");
        System.out.println("output file is ecoded as unicode? " + (isUnicode ? "yes" : "no"));
        if (isRemoveInputFileOnComplete) {
            File input = new File(inputFilePath);
            input.deleteOnExit();
            System.out.println("Deleted " + inputFilePath);
        }

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (in != null) {
            in.close();
        }
    }

}

From source file:Main.java

public static byte[] LoadImage(String filePath) throws Exception {
      File file = new File(filePath);
      int size = (int) file.length();
      byte[] buffer = new byte[size];
      FileInputStream in = new FileInputStream(file);
      in.read(buffer);/*from ww w .ja  va2s  . com*/
      in.close();
      return buffer;
  }

From source file:Main.java

public static String readTxtFromFile(File file) throws Exception {
    ByteBuffer buffer = ByteBuffer.allocate((int) file.length());
    FileInputStream in = new FileInputStream(file);
    in.getChannel().read(buffer);//from ww  w  .j a va2s. c  o m
    in.close();
    return new String(buffer.array());
}

From source file:MainClass.java

public static void typeFile(String filename) throws IOException {
    FileInputStream fin = new FileInputStream(filename);
    try {//  w w  w.j  a  v a2 s .  c  om
        copy(fin, System.out);
    } finally {
        fin.close();
    }
}

From source file:Main.java

public static int getFileSize(File file) {
    int size = 0;

    try {/* w  ww.  ja  v a 2s. c  o  m*/
        FileInputStream fis = new FileInputStream(file);
        size = fis.available();
        fis.close();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return size;
}

From source file:Main.java

public static Document getXmlDocument(File file) throws Exception {
    DocumentBuilderFactory docBuilderFactory = null;
    DocumentBuilder db = null;// w w  w . j av  a2 s .c o  m
    Document document = null;
    docBuilderFactory = DocumentBuilderFactory.newInstance();
    db = docBuilderFactory.newDocumentBuilder();

    if (file.exists()) {
        FileInputStream in = new FileInputStream(file);
        document = db.parse(in);
        in.close();
    }
    db = null;
    docBuilderFactory = null;
    return document;
}

From source file:Main.java

public static String getStringFromFile(String filePath) throws Exception {
    FileInputStream fin = new FileInputStream(new File(filePath));
    String ret = convertStreamToString(fin);
    fin.close();
    return ret;//from ww  w  .  ja  v a2s.  c  o  m
}