package com.http.get;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import org.apache.http.message.BasicNameValuePair;
public class HttpUtils {
    private static String URL_PATH = "http://192.168.0.102:8080/myhttp/pro1.png";
    public HttpUtils() {
        // TODO Auto-generated constructor stub
    }
    public static void saveImageToDisk() {
        InputStream inputStream = getInputStream();
        byte[] data = new byte[1024];
        int len = 0;
        FileOutputStream fileOutputStream = null;
        try {
            fileOutputStream = new FileOutputStream("C:\\test.png");
            while ((len = inputStream.read(data)) != -1) {
                fileOutputStream.write(data, 0, len);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
    /**
     * 獲得伺服器端的資料,以InputStream形式返回
     * @return
     */
    public static InputStream getInputStream() {
        InputStream inputStream = null;
        HttpURLConnection httpURLConnection = null;
        try {
            URL url = new URL(URL_PATH);
            if (url != null) {
                httpURLConnection = (HttpURLConnection) url.openConnection();
                // 設定連線網路的超時時間
                httpURLConnection.setConnectTimeout(3000);
                httpURLConnection.setDoInput(true);
                // 表示設定本次http請求使用GET方式請求
                httpURLConnection.setRequestMethod("GET");
                int responseCode = httpURLConnection.getResponseCode();
                if (responseCode == 200) {
                    // 從伺服器獲得一個輸入流
                    inputStream = httpURLConnection.getInputStream();
                }
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return inputStream;
    }
    public static void main(String[] args) {
        // 從伺服器獲得圖片儲存到本地
        saveImageToDisk();
    }
}