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{/** * 读取网络图片并保存至服务器硬盘中 * @param imgUrl * @return 图片保存的服务器路径 */public static String getImages(String imgUrl){String imgPath = "";try{ //new一个URL对象 URL url = new URL(imgUrl); //打开链接 HttpURLConnection conn = (HttpURLConnection)url.openConnection(); //设置请求方式为"GET" conn.setRequestMethod("GET"); //超时响应时间为5秒 conn.setConnectTimeout(5 * 1000); //通过输入流获取图片数据 InputStream inStream = conn.getInputStream(); //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 byte[]data = readInputStream(inStream); imgPath = ImageRequest.class.getClassLoader().getResource("").getPath(); imgPath = imgPath.split("WEB-INF")[0]; imgPath = imgPath+"images/"+"haha.jpg"; //new一个文件对象用来保存图片,默认保存当前工程根目录 File imageFile = new File(imgPath); //创建输出流 FileOutputStream outStream = new FileOutputStream(imageFile); //写入数据 outStream.write(data); //关闭输出流 outStream.close(); //服务器文件路径 imgPath = imgPath.split("WebRoot")[1]; System.out.PRintln(imgPath);}catch(Exception e){e.printStackTrace();}return imgPath;} /** * 读取文件流 * @param inStream * @return * @throws Exception */ public static byte[] readInputStream(InputStream inStream) throws Exception{ ByteArrayOutputStream outStream = new ByteArrayOutputStream(); //创建一个Buffer字符串 byte[] buffer = new byte[1024]; //每次读取的字符串长度,如果为-1,代表全部读取完毕 int len = 0; //使用一个输入流从buffer里把数据读取出来 while( (len=inStream.read(buffer)) != -1 ){ //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 outStream.write(buffer, 0, len); } //关闭输入流 inStream.close(); //把outStream里的数据写入内存 return outStream.toByteArray(); } public static void main(String[] args) throws Exception { ImageRequest.getImages("http://image.meilele.com/images/201311/1385338928366387259.jpg"); }}
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