cURL和HttpURLConnection - Post JSON数据

问题描述

如何使用HttpURLConnection发布JSON数据？我尝试这样：

How to post JSON data using HttpURLConnection? I am trying this:

HttpURLConnection httpcon = (HttpURLConnection) ((new URL("a url").openConnection()));
httpcon.setDoOutput(true);
httpcon.setRequestProperty("Content-Type", "application/json");
httpcon.setRequestProperty("Accept", "application/json");
httpcon.setRequestMethod("POST");
httpcon.connect();

StringReader reader = new StringReader("{'value': 7.5}");
OutputStream os = httpcon.getOutputStream();

char[] buffer = new char[4096];
int bytes_read;
while((bytes_read = reader.read(buffer)) != -1) {
    os.write(buffer, 0, bytes_read);// I am getting compilation error here
}
os.close();

我在第14行收到编译错误。

I am getting compilation error in line 14.

cURL请求是：

curl -H "Accept: application/json" \
-H "Content-Type: application/json" \
-d "{'value': 7.5}" \
"a URL"

这是处理cURL请求的方式吗？任何信息将对我非常有帮助。

Is this the way to handle cURL request? Any information will be very helpful to me.

谢谢。

推荐答案

OutputStream希望使用字节，你传递它的字符。尝试这样：

OutputStream expects to work with bytes, and you're passing it characters. Try this:

HttpURLConnection httpcon = (HttpURLConnection) ((new URL("a url").openConnection()));
httpcon.setDoOutput(true);
httpcon.setRequestProperty("Content-Type", "application/json");
httpcon.setRequestProperty("Accept", "application/json");
httpcon.setRequestMethod("POST");
httpcon.connect();

byte[] outputBytes = "{'value': 7.5}".getBytes("UTF-8");
OutputStream os = httpcon.getOutputStream();
os.write(outputBytes);

os.close();

这篇关于cURL和HttpURLConnection - Post JSON数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！