httpclient读取字节流并转换为byte[]数组

矫情吗；* 2022-04-23 02:00 180阅读 0赞

在web项目中,httpclient 工具被经常使用.最近一个需求是,俩个应用 , 
    第一个应用存入用户上传图片地址,然后存储到ftp服务器上,
    第二个应用使用httpclient读取第一个应用存入ftp的图片字节流.  
    下面是代码:

/**
         * httpclient发送get请求
         */
        public static byte[] httpGet(String uri) {
            CloseableHttpClient httpclient = HttpClients.createDefault();
            byte[] fileBytes = null;
            try {
                // 创建httpclient get请求.
                HttpGet httpget = new HttpGet(uri);
    
                System.out.println(" request for :" + httpget.getURI());
                // 执行get请求.
                CloseableHttpResponse response = httpclient.execute(httpget);
                try {
                    //获取响应实体
                    HttpEntity entity = response.getEntity();
                    InputStream inputContent = entity.getContent();
                    fileBytes = input2byte(inputContent);
                } finally {
                    response.close();
                }
            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (ParseException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                // 关闭连接,释放资源
                try {
                    httpclient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return fileBytes;
        }
    
        /**
         * inputStream转换为byte字节数组
         * @param inStream
         * @return
         * @throws IOException
         */
        public static final byte[] input2byte(InputStream inStream) throws IOException {
            ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
            byte[] buff = new byte[100];
            int rc = 0;
            while ((rc = inStream.read(buff, 0, 100)) > 0) {
                 swapStream.write(buff, 0, rc);
            }
            byte[] in2b = swapStream.toByteArray();
            return in2b;
       }

代码还不够完善.请多多指点.