package cn.net.ching;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class ImageRequest {
/**
* @param args
*/
public static void main(String[] args) throws Exception {
//new一個URL對象
URL url = new URL("http://pic1.nipic.com/2008-12-15/20081215211851562_2.jpg");
//打開鏈接
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//設置請求方式為"GET"
conn.setRequestMethod("GET");
//超時響應時間為5秒
conn.setConnectTimeout(5 * 1000);
//通過輸入流獲取圖片數據
InputStream inStream = conn.getInputStream();
//得到圖片的二進制數據，以二進制封裝得到數據，具有通用性
byte[] data = readInputStream(inStream);
//new一個文件對象用來保存圖片，默認保存當前工程根目錄
File imageFile = new File("BeautyGirl16.jpg");
//創建輸出流
FileOutputStream outStream = new FileOutputStream(imageFile);
//寫入數據
outStream.write(data);
//關閉輸出流
outStream.close();
}
public static byte[] readInputStream(InputStream inStream) throws Exception{
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
//創建一個Buffer字符串
byte[] buffer = new byte[1024];
//每次讀取的字符串長度，如果為-1，代表全部讀取完畢
int len = 0;
//使用一個輸入流從buffer里把數據讀取出來
while( (len=inStream.read(buffer)) != -1 ){
//用輸出流往buffer里寫入數據，中間參數代表從哪個位置開始讀，len代表讀取的長度
outStream.write(buffer, 0, len);
}
//關閉輸入流
inStream.close();
//把outStream里的數據寫入內存
return outStream.toByteArray();
}
}