HttpClient（三）-- 抓取图片

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使用HttpClient抓取图片，先通过 entity.getContent() 获取输入流，然后使用 common io 中的文件复制方法将图片专区到本地，代码如下：

1.需要依赖common io包

<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>

2.Java代码：

public static void main(String[] args) throws ClientProtocolException, IOException {
// 图片路径
String url = "https://ss0.bdstatic.com/94oJfD_bAAcT8t7mm9GUKT-xh_/timg?image&quality=100&size=b4000_4000&sec=1505227453&di=197253946d222b27d4894f18cfd00fe0&src=http://www2.chinaedu.com/101resource003/kewaiuser/dersk/yddd15/img/yddd15_1_clip_image001.jpg";
// 创建httpClient实例
CloseableHttpClient httpClient = HttpClients.createDefault();
// 创建httpGet实例
HttpGet httpGet = new HttpGet(url);
// 设置请求头消息
httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0");
CloseableHttpResponse response = httpClient.execute(httpGet);
// 获取 .后缀
String fileName = url.substring(url.lastIndexOf("."), url.length()); if(response != null){
HttpEntity entity = response.getEntity(); // 获取返回实体
if(entity != null){
System.out.println("Content-Type:" + entity.getContentType().getValue());
InputStream inputStream = entity.getContent();
// 文件复制，common io 包下，需要引入依赖
FileUtils.copyToFile(inputStream, new File("C:joe" + fileName));
}
}
if(response != null){
response.close();
}
if(httpClient != null){
httpClient.close();
}
}