Java URL Load readContentFromFile(URL u, String encoding)

Description

read Content From File

License

Open Source License

Declaration

public static String readContentFromFile(URL u, String encoding) 

Method Source Code

//package com.java2s;
// it under the terms of the GNU General Public License as published by

import java.io.BufferedReader;

import java.io.File;
import java.io.FileInputStream;

import java.io.InputStream;
import java.io.InputStreamReader;

import java.net.URL;

public class Main {
    public static final int INTERNAL_BUFFER_SIZE = 16 * 1024;

    public static String readContentFromFile(URL u, String encoding) {
        String content = "";

        try {/*from w w w  . j  a va2s .co  m*/
            int readLength = 0;
            char[] readBuffer = new char[INTERNAL_BUFFER_SIZE];

            BufferedReader uReader = null;
            StringBuffer buf = new StringBuffer();
            char c;
            long toRead = Long.MAX_VALUE;

            if (encoding != null && !encoding.equalsIgnoreCase("")) {
                uReader = new BufferedReader(new InputStreamReader(u.openStream(), encoding), INTERNAL_BUFFER_SIZE);
            } else {
                uReader = new BufferedReader(new InputStreamReader(u.openStream()), INTERNAL_BUFFER_SIZE);
            }

            // read gtom source into buffer
            while (toRead > 0 && (readLength = uReader.read(readBuffer, 0, INTERNAL_BUFFER_SIZE)) != -1) {
                if (toRead < readLength) {
                    //well, if toRead(long) is less than readLenght(int)
                    //then there can be no overflow, so the cast is safe
                    readLength = (int) toRead;
                }

                buf.append(readBuffer, 0, readLength);
                toRead -= readLength;
            }

            // 4.close reader
            uReader.close();

            content = new String(buf);
        } catch (java.net.MalformedURLException urlEx) {
            urlEx.printStackTrace();
        } catch (java.io.IOException ioEx) {
            ioEx.printStackTrace();
        }

        return content;
    }

    public static String readContentFromFile(String inputFilename, String encoding) {
        String content = "", st = "";

        try {
            File df = new File(inputFilename);
            BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(df), encoding));

            content = reader.readLine();
            while ((st = reader.readLine()) != null) {
                content += "\n" + st;
            }

            // 4.close reader
            reader.close();
        } catch (java.net.MalformedURLException urlEx) {
            urlEx.printStackTrace();
        } catch (java.io.IOException ioEx) {
            ioEx.printStackTrace();
        }

        return content;
    }

    public static String readContentFromFile(InputStream inputStream) {
        String content = "";

        try {
            int readLength = 0;
            char[] readBuffer = new char[INTERNAL_BUFFER_SIZE];

            BufferedReader uReader = null;
            StringBuffer buf = new StringBuffer();
            char c;
            long toRead = Long.MAX_VALUE;

            uReader = new BufferedReader(new InputStreamReader(inputStream), INTERNAL_BUFFER_SIZE);

            // read gtom source into buffer
            while (toRead > 0 && (readLength = uReader.read(readBuffer, 0, INTERNAL_BUFFER_SIZE)) != -1) {
                if (toRead < readLength) {
                    //well, if toRead(long) is less than readLenght(int)
                    //then there can be no overflow, so the cast is safe
                    readLength = (int) toRead;
                }

                buf.append(readBuffer, 0, readLength);
                toRead -= readLength;
            }

            // 4.close reader
            uReader.close();

            content = new String(buf);
        } catch (java.net.MalformedURLException urlEx) {
            urlEx.printStackTrace();
        } catch (java.io.IOException ioEx) {
            ioEx.printStackTrace();
        }

        return content;
    }
}

Related

1. readAsStringUTF8(URL url)
2. readBytes(URL url)
3. readBytesFromURL(String url)
4. readBytesFromUrl(URL url)
5. readContent(URL url)
6. readContents(URL url)
7. readContentsToArray(URL url)
8. readContentsToList(URL url)
9. readContentsToString(URL url)