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通過Java HTTP連接將網絡圖片下載到本地
package imageView;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* @說明 從網絡獲取圖片到本地
* @version 1.0
* @since
*/
public class GetImage {
/**
* 測試
* @param args
*/
public static void main(String[] args) {
String url = "https://www.baidu.com/img/baidu_sylogo1.gif";
byte[] btImg = getImageFromNetByUrl(url);
if(null != btImg && btImg.length > 0){
System.out.println("讀取到：" + btImg.length + " 字節");
String fileName = "百度.gif";
writeImageToDisk(btImg, fileName);
}else{
System.out.println("沒有從該連接獲得內容");
}
}
/**
* 將圖片寫入到磁盤
* @param img 圖片數據流
* @param fileName 文件保存時的名稱
*/
public static void writeImageToDisk(byte[] img, String fileName){
try {
File file = new File("C:\\" + fileName);
FileOutputStream fops = new FileOutputStream(file);
fops.write(img);
fops.flush();
fops.close();
System.out.println("圖片已經寫入到C盤");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 根據地址獲得數據的字節流
* @param strUrl 網絡連接地址
* @return
*/
public static byte[] getImageFromNetByUrl(String strUrl){
try {
URL url = new URL(strUrl);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5 * 1000);
InputStream inStream = conn.getInputStream();//通過輸入流獲取圖片數據
byte[] btImg = readInputStream(inStream);//得到圖片的二進製數據
return btImg;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 從輸入流中獲取數據
* @param inStream 輸入流
* @return
* @throws Exception
*/
public static byte[] readInputStream(InputStream inStream) throws Exception{
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while( (len=inStream.read(buffer)) != -1 ){
outStream.write(buffer, 0, len);
}
inStream.close();
return outStream.toByteArray();
}
}
https://cuisuqiang.iteye.com/blog/1726173
最後更新：2017-04-04 07:03:12