如何使用谷歌API从谷歌图像保存图像？

Question

i'm trying to search in Google-images some different and save the first result for every query with java Google API.

I managed to search in Google and get the json object which contains the search results. the object contains the web sites which contains the images,and not the image address

code:

URL url = new URL("https://ajax.googleapis.com/ajax/services/search/images?" +
                    "v=1.0&q="+properties.getProperty(Integer.toString(i))+"&userip=IP");
            URLConnection connection = url.openConnection();
            connection.addRequestProperty("Referer", "images.google.com");

        String line;
        StringBuilder builder = new StringBuilder();
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        while((line = reader.readLine()) != null) {
        builder.append(line);
        }

        JSONObject json = new JSONObject(builder.toString())

I'm also know how to save image if i had the image link.

my problem is how to get the first (or second or whatever) image right address and not the web address (example www.yadayadayada.com/image.png)

10x

Answer 1

JSON interface is described at JSON Developer's Guide . In particular, JSON reference section outlines response format and guaranteed fields. You can use a value of url property.

Given the URL, you can read the image and write it to the disk using ImageIO . Here is the relevant tutorial .

If the image manipulation and presentation is not required, then you could use HttpURLConnection to simply download the file.

EDIT: example

Below is a simple example based on the code included in the question. It performs a search and displays the first image.

import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;

public class TestImage {

    public static void main(String[] args) {
        try{
            URL url = new URL("https://ajax.googleapis.com/ajax/services/search/images?v=1.0&q=Godfather");
            URLConnection connection = url.openConnection();

            String line;
            StringBuilder builder = new StringBuilder();
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            while((line = reader.readLine()) != null) {
                builder.append(line);
            }

            JSONObject json = new JSONObject(builder.toString());
            String imageUrl = json.getJSONObject("responseData").getJSONArray("results").getJSONObject(0).getString("url");

            BufferedImage image = ImageIO.read(new URL(imageUrl));
            JOptionPane.showMessageDialog(null, "", "", JOptionPane.INFORMATION_MESSAGE, new ImageIcon(image));
        } catch(Exception e){
            JOptionPane.showMessageDialog(null, e.getMessage(), "Failure", JOptionPane.ERROR_MESSAGE);
            e.printStackTrace();
        }
    }
}