通过http URL 获取图片流 转为字节数组

/**
* 获取 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(); //通过输入流获取图片数据
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;
}

--2
/**
* 读取 本地文件，转为字节数组
* @param url 本地文件路径
* @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;
}