java下载图片(通用)httpClient,io流
httpClient下载图片
public static void downImage(CloseableHttpClient client, String imgUrl, String savePath) {
HttpGet request = new HttpGet(imgUrl);
// 设置请求超时和传输超时
RequestConfig requestConfig = RequestConfig.custom()
.setSocketTimeout(50000).setConnectTimeout(50000).build();
//伪造请求头
request.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36");
request.setConfig(requestConfig);
// 报错PKIX path building failed 不验证证书添加下面注释语句
/* try {
SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(null, new TrustSelfSignedStrategy()).build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[]{"TLSv1"}, null, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
client = HttpClients.custom().setSSLSocketFactory(sslsf).build();
} catch (Exception e) {
e.printStackTrace();
}*/
try {
CloseableHttpResponse response = client.execute(request);
if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {
HttpEntity entity = response.getEntity();
InputStream in = entity.getContent();
FileUtils.copyInputStreamToFile(in, new File(savePath));
System.out.println("下载成功:" + imgUrl);
}
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
} finally {
request.releaseConnection();
}
}
我们测试一下:
public static void main(String[] args) {
CloseableHttpClient client =null;
try {
client = HttpClients.createDefault();//写循环外
downImage(client,"http://www.XXXX.com.cn/uploadfile/ftpfile/XXX.png", "E:/image/1478150765619314881279.PNG");
} catch (Exception e) {
e.printStackTrace();
}finally{
if(client!=null){
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
io流下载
public class ImageDownload {
public static boolean httpDownload(String httpUrl, String saveFile) {
// 1.下载网络文件
int byteRead;
URL url;
try {
url = new URL(httpUrl);
} catch (MalformedURLException e1) {
e1.printStackTrace();
return false;
}
try {
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//2.获取链接
// URLConnection conn = url.openConnection();
if (conn.getResponseCode() == 404) {
System.out.println("状态码呱啦啦啦啦啦啦啦啦==" + url);
return false;
}
//3.输入流
InputStream inStream = conn.getInputStream();
//3.写入文件
File file = new File(saveFile);
if (!file.exists()) {
//先得到文件的上级目录，并创建上级目录，在创建文件
file.getParentFile().mkdir();
try {
//创建文件
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
FileOutputStream fs = new FileOutputStream(file);
byte[] buffer = new byte[1024];
while ((byteRead = inStream.read(buffer)) != -1) {
fs.write(buffer, 0, byteRead);
}
inStream.close();
fs.close();
return true;
} catch (FileNotFoundException e) {
System.out.println("文件找不到呱啦啦啦啦啦啦啦啦==" + url);
e.printStackTrace();
return false;
} catch (IOException e) {
System.out.println("IO呱啦啦啦啦啦啦啦啦==" + url);
e.printStackTrace();
return false;
}
}
}
测试一下:
public static void main(String[] args) {
ImageDownload.httpDownload("http://www.xxxxx.cn/uploadfile/ftpfile/xxxxx.png,", "E:\\image\\xxxx.PNG");
}