cURL和HttpURLConnection - 发布JSON数据
如何使用HttpURLConnection发布JSON数据?我想这一点:cURL和HttpURLConnection - 发布JSON数据
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();
我得到的编译错误在第14行
卷曲请求:
curl -H "Accept: application/json" \
-H "Content-Type: application/json" \
-d "{'value': 7.5}" \
"a URL"
这是处理卷曲请求的方式?任何信息对我都很有帮助。
谢谢。
OutputStream期望与字节一起使用,并且您将字符传递给它。试试这个:
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();
难道不能以这种方式发送复杂的json对象吗?例如... “{”points“:[{”point“:{”latitude“:40.8195085182092,”longitude“: - 73.75127574479318},”description“:”test“},{”point“:{纬度“:40.2195085182092,”经度“: - 74.75127574479318},”description“:”test2“}],”mode“:”WALKING“}” ...是通过此方法发送的对象,得到500的HTTP响应代码。 – crowmagnumb 2013-12-03 04:30:20
@CrowMagnumb你应该发布一个单独的问题。 500意味着服务器尝试处理您的请求时发生内部错误。 – ykaganovich 2013-12-03 19:59:27
好吧,我已经这么做了[这里](http://*.com/questions/20452366/http-response-code-500-sending-complex-json-object-using-httpurlconnection)感谢您的建议。 – crowmagnumb 2013-12-08 10:34:44
您可能需要使用OutputStreamWriter类。
final String toWriteOut = "{'value': 7.5}";
final OutputStreamWriter osw = new OutputStreamWriter(connection.getOutputStream());
osw.write(toWriteOut);
osw.close();
对'OutputStream'有什么好处? – Darpan 2015-07-30 07:15:17
您应该发布编译错误 – ykaganovich 2012-03-08 19:08:58