以JSON请求发送图像 [英] Send Image in JSON request

问题描述

我正在将JSON与REST api结合使用以使用Web服务.

I'm using JSON with REST api for using web service.

现在，我还需要在请求中发送图片.有可能吗?

Now I also need to send Images in request. Is it possible?

如果是，我需要在客户端/服务器端进行哪些更改.

If yes, what changes do I need to do on client/server side.

在我的Java代码中，我应该如何发送图像内容(我需要单独设置内容类型)吗?

And in my Java code, how should I send the image content (do I need to set a content type separately)?

推荐答案

做到这一点的方法是将其作为内容发送到HttpPost请求中，如下所示:

The way to do that would be to send it as content inside a HttpPost request as below

HttpClient client = new DefaultHttpClient();
HttpPost postRequest = new HttpPost(url);
String body = getMessageBody();
try
{
    postRequest.setEntity(new StringEntity(body, "UTF8"));
    postRequest.setHeader("Content-Type", "application/x-www-form-urlencoded");
    HttpResponse response = client.execute(postRequest);
    return response;
} catch (UnsupportedEncodingException e)
{
    e.printStackTrace();
} catch (ClientProtocolException e)
{
    e.printStackTrace();
} catch (IOException e)
{
    e.printStackTrace();
}

对图像进行字符串编码的方法是执行以下操作.

The way you would string encode the image would be to do the following.

BufferedImage img = ImageIO.read(new File("filename.jpg"));             
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(img, "jpg", baos);
baos.flush();
Base64 base = new Base64(false);
String encodedImage = base.encodeToString(baos.toByteArray());
baos.close();
encodedImage = java.net.URLEncoder.encode(encodedImage, "ISO-8859-1");

祝你好运

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