Java Text File Read readFile(String filePath)

Description

read File

License

Open Source License

Declaration

public static String readFile(String filePath) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w w  w .j a v a 2 s . co  m
 * This file is part of Giswater
 * Copyright (C) 2013 Tecnics Associats
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Author:
 *   David Erill <derill@giswater.org>
 */

import java.awt.Component;

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.io.StringWriter;

import java.util.ResourceBundle;

import java.util.logging.Logger;

import javax.swing.JOptionPane;

public class Main {
    private static final int NUM_LEVELS = 10;
    private static Logger logger;
    private static ResourceBundle bundleText;

    public static String readFile(String filePath) throws IOException {
        return readFile(filePath, true);
    }

    public static String readFile(String filePath, boolean showError) throws IOException {

        File fileName = new File(filePath);
        if (!fileName.exists()) {
            if (showError) {
                showError("inp_error_notfound", filePath);
            } else {
                logError("inp_error_notfound", filePath);
            }
            return "";
        }
        RandomAccessFile rat = new RandomAccessFile(fileName, "r");
        String line;
        String content = "";
        while ((line = rat.readLine()) != null) {
            content += line + "\n";
        }
        rat.close();

        return content;

    }

    public static void showError(String msg) {
        showError(msg, "");
    }

    public static void showError(Exception e) {
        showError(e, "");
    }

    public static void showError(String msg, String param) {
        showError(null, msg, param);
    }

    public static void showError(Component comp, String msg) {
        showError(null, msg, "");
    }

    public static void showError(Component comp, String msg, String param) {

        String userMsg = getBundleString(msg);
        if (!param.equals("")) {
            userMsg += "\n" + param;
        }
        logError(msg, param);
        JOptionPane.showMessageDialog(comp, userMsg, getBundleString("inp_descr"), JOptionPane.WARNING_MESSAGE);

    }

    public static void showError(Exception e, String param) {
        logError(e, param);
        JOptionPane.showMessageDialog(null, e.getMessage(), getBundleString("inp_descr"),
                JOptionPane.WARNING_MESSAGE);
    }

    public static void logError(String msg) {
        logError(msg, "");
    }

    public static void logError(Exception e) {
        logError(e, "");
    }

    public static void logError(String msg, String param) {
        if (logger != null) {
            String errorMsg = getBundleString(msg);
            if (!param.equals("")) {
                errorMsg += "\nParameter: " + param;
            }
            logger.warning(errorMsg);
        }
    }

    public static void logError(Exception e, String param) {

        if (logger != null) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw, true);
            e.printStackTrace(pw);
            pw.flush();
            sw.flush();
            String fullStack = sw.toString();
            String[] lines = fullStack.split(System.getProperty("line.separator"));
            String shortStack = "";
            for (int i = 0; i < NUM_LEVELS; i++) {
                shortStack += lines[i] + "\n";
            }
            if (param != "") {
                shortStack += "Parameter: " + param;
            }
            logger.warning(shortStack);
        }

    }

    public static String getBundleString(String key) {
        return getBundleString(bundleText, key);
    }

    public static String getBundleString(ResourceBundle bundle, String key) {
        try {
            return bundle.getString(key);
        } catch (Exception e) {
            return key;
        }
    }
}

Related

1. getFileContents(String filePath)
2. getFileContents(String path)
3. getFileContents(String pathToFile)
4. getFileContents(String pFileName)
5. loadAsString(String location)
6. readFile(String path)
7. readTextFile(File file, int max, String ellipsis)
8. readTextFile(final DataInputStream is)
9. readTextFile(final String path, final String enc)