Java通过http请求保存远程图片至本地详解编程语言

//new一个URL对象 URL url = new URL("http://www.open-open.com/code/images/opencode.jpg"); //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=null; try{ inStream = conn.getInputStream(); }catch (Exception e) { System.out.println("Error"+one+","+two); System.out.println("///"); if(two==20){ one++; two=1; }else{ two++; if(one==21){ return; continue; //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); //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(one+","+two+".jpg"); System.out.println(one+","+two); //创建输出流 FileOutputStream outStream = new FileOutputStream(imageFile); //写入数据 outStream.write(data); //关闭输出流 outStream.close(); if(two==20){ one++; two=1; }else{ two++; if(one==20){ return; 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(); }

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/10539.html

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