通過http URL 獲取圖片流 轉爲字節數組

一、通過http URL 獲取圖片流 轉爲字節數組

/**
     * 獲取 文件 流
     * @param url
     * @return
     * @throws IOException
     */
    private byte[] getFile(String url) throws IOException{
        URL urlConet = new URL(url);
        HttpURLConnection con = (HttpURLConnection)urlConet.openConnection();    
        con.setRequestMethod("GET");    
        con.setConnectTimeout(4 * 1000);    
        InputStream inStream = con .getInputStream();    //通過輸入流獲取圖片數據    
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();    
        byte[] buffer = new byte[2048];    
        int len = 0;    
        while( (len=inStream.read(buffer)) != -1 ){    
            outStream.write(buffer, 0, len);    
        }    
        inStream.close();    
        byte[] data =  outStream.toByteArray(); 
        return data;
    }

 二、讀取本地文件轉爲數組

/**
     * 讀取 本地文件，轉爲字節數組
     * @param url 本地文件路徑
     * @return
     * @throws IOException
     */
    private byte[] getImage(String url) throws IOException{
        BufferedInputStream in = new BufferedInputStream(new FileInputStream(url));
        ByteArrayOutputStream out = new ByteArrayOutputStream(1024);    
       
        byte[] temp = new byte[2048];        
        int size = 0;        
        while ((size = in.read(temp)) != -1) {        
            out.write(temp, 0, size);        
        }        
        in.close();  
        byte[] content = out.toByteArray();  
        return content;
    }