Java URL Load saveImageAsFile(String imageUrl, String destinationFile, boolean overwrite)

Description

Save an image url to the disk

License

Apache License

Parameter

Parameter	Description
imageUrl	a parameter
destinationFile	a parameter
overwrite	a parameter

Exception

Parameter	Description
IOException	an exception

Declaration

public static long saveImageAsFile(String imageUrl, String destinationFile, boolean overwrite) 

Method Source Code

//package com.java2s;
/*// w w  w  .  j a  v  a 2 s .c  o m
 * Copyright 2013 Midhun Harikumar
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

public class Main {
    private static final int BUFFER_SIZE = 4096;

    /**
     * Save an image url to the disk
     * 
     * @param imageUrl
     * @param destinationFile
     * @param overwrite
     * @throws IOException
     */
    public static long saveImageAsFile(String imageUrl, String destinationFile, boolean overwrite) {
        URL url = null;
        long fileSize = 0;
        InputStream is = null;
        OutputStream os = null;
        try {
            if (overwrite == false) {
                // If overwrite is false, check if the file exists
                File file = new File(destinationFile);
                if (file.exists()) {
                    // Short circuit the file saving logic
                    throw new Exception("Skipping save as file already exists");
                }
            }
            // Open the image URL stream and download / read the image data
            url = new URL(imageUrl);
            is = url.openStream();
            os = new FileOutputStream(destinationFile);

            // At a time, BUFFER_SIZE amount of data will be read from the stream
            byte[] b = new byte[BUFFER_SIZE];
            int length;
            while ((length = is.read(b)) != -1) {
                fileSize += length;
                os.write(b, 0, length);
            }
        } catch (IOException e) {
            System.err.println(e.getMessage());
        } catch (Exception e) {
            System.err.println(e.getMessage());
        } finally {
            try {
                if (is != null)
                    is.close();
                if (os != null)
                    os.close();
            } catch (IOException e) {
                System.err.println(e.getMessage());
                return fileSize;
            }
        }
        return fileSize;
    }
}

Related

1. readURLToByteArray(URL url)
2. readURLToString(URL u, String encoding)
3. saveFile(final URL url, final File file)
4. saveFileFromURL(URL url, File destinationFile)
5. saveImage(String imageUrl, String destinationFile)
6. saveUrl(String filename, String urlString)
7. saveUrl(String filename, URL url)
8. saveURL(URL url, OutputStream os)