1 package cn.cctv.NET; 2 import java.io.ByteArrayOutputStream; 3 import java.io.File; 4 import java.io.FileOutputStream; 5 import java.io.InputStream; 6 import java.net.HttpURLConnection; 7 import java.Net.URL; 8 public class ImageRequest { 9 /** 10 * @param args 11 */ 12 public static void main(String[] args) throws Exception { 13 //new一个URL对象 14 URL url = new URL("http://img.hexun.com/2011-06-21/130726386.jpg"); 15 //打开链接 16 HttpURLConnection conn = (HttpURLConnection)url.openConnection(); 17 //设置请求方式为"GET" 18 conn.setRequestMethod("GET"); 19 //超时响应时间为5秒 20 conn.setConnectTimeout(5 * 1000); 21 //通过输入流获取图片数据 22 InputStream inStream = conn.getInputStream(); 23 //得到图片的二进制数据,以二进制封装得到数据,具有通用性 24 byte[] data = readInputStream(inStream); 25 //new一个文件对象用来保存图片,默认保存当前工程根目录 26 File imageFile = new File("BeautyGirl.jpg"); 27 //创建输出流 28 FileOutputStream outStream = new FileOutputStream(imageFile); 29 //写入数据 30 outStream.write(data); 31 //关闭输出流 32 outStream.close(); 33 } 34 public static byte[] readInputStream(InputStream inStream) throws Exception{ 35 ByteArrayOutputStream outStream = new ByteArrayOutputStream(); 36 //创建一个Buffer字符串 37 byte[] buffer = new byte[1024]; 38 //每次读取的字符串长度,如果为-1,代表全部读取完毕 39 int len = 0; 40 //使用一个输入流从buffer里把数据读取出来 41 while( (len=inStream.read(buffer)) != -1 ){ 42 //用输出流往buffer里写入数据,中间参数代表从哪个位置开始读,len代表读取的长度 43 outStream.write(buffer, 0, len); 44 } 45 //关闭输入流 46 inStream.close(); 47 //把outStream里的数据写入内存 48 return outStream.toByteArray(); 49 } 50 }