抓取服务器图片下载到本地

2019-11-15 00:44:48

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抓取服务器图片下载到本地Sample code：import org.apache.http.Header;import org.apache.http.HttPResponse;import org.apache.http.HttpStatus;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;public void download(String path, String url) { // String url = "xxxxxxxx"; // String path = "F:/test.jpg"; HttpClient client = null; try { // 创建HttpClient对象 client = new DefaultHttpClient(); // 获得HttpGet对象 HttpGet httpGet = getHttpGet(url, null, null); // 发送请求获得返回结果 HttpResponse response = client.execute(httpGet); // 如果成功 if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { byte[] result = EntityUtils.toByteArray(response.getEntity()); BufferedOutputStream bw = null; try { // 创建文件对象 File f = new File(path); // 创建文件路径 if (!f.getParentFile().exists()) f.getParentFile().mkdirs(); // 写入文件 bw = new BufferedOutputStream(new FileOutputStream(path)); bw.write(result); } catch (Exception e) { log.error("保存文件错误,path=" + path + ",url=" + url, e); } finally { try { if (bw != null) bw.close(); } catch (Exception e) { log.error( "finally BufferedOutputStream shutdown close", e); } } } // 如果失败 else { StringBuffer errorMsg = new StringBuffer(); errorMsg.append("httpStatus:"); errorMsg.append(response.getStatusLine().getStatusCode()); errorMsg.append(response.getStatusLine().getReasonPhrase()); errorMsg.append(", Header: "); Header[] headers = response.getAllHeaders(); for (Header header : headers) { errorMsg.append(header.getName()); errorMsg.append(":"); errorMsg.append(header.getValue()); } log.error("HttpResonse Error:" + errorMsg); } } catch (ClientProtocolException e) { log.error("下载文件保存到本地,http连接异常,path=" + path + ",url=" + url, e); } catch (IOException e) { log.error("下载文件保存到本地,文件操作异常,path=" + path + ",url=" + url, e); } finally { try { client.getConnectionManager().shutdown(); } catch (Exception e) { log.error("finally HttpClient shutdown error", e); } } } private static HttpGet getHttpGet(String url, Map<String, String> params, String encode) { StringBuffer buf = new StringBuffer(url); if (params != null) { // 地址增加?或者& String flag = (url.indexOf('?') == -1) ? "?" : "&"; // 添加参数 for (String name : params.keySet()) { buf.append(flag); buf.append(name); buf.append("="); try { String param = params.get(name); if (param == null) { param = ""; } buf.append(URLEncoder.encode(param, encode)); } catch (UnsupportedEncodingException e) { log.error("URLEncoder Error,encode=" + encode + ",param=" + params.get(name), e); } flag = "&"; } } HttpGet httpGet = new HttpGet(buf.toString()); return httpGet; }

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