the environmental background of the problems and what methods you have tried
in my implementation of the HttpHandler, rewrite handle method,
writes a normal string (such as "hello") to responseBody, and the browser accesses this method to get the corresponding data.
but write the json string (for example: "{" pid ":" 510229197206267348 "," pname ":" Zhang San "}"). The browser accesses Status Code: 200OK, but Status is failed.
I guess it"s the data format type set in the background header, but headers.set ("Content-Type", "application/json; charset=utf-8") is set; it doesn"t work either.
write "{" pid ":" 510229197206267348 "," pname ":" Zhang San "}" access service method screenshot:
"hello word":
related codes
public static void main(String[] arg) throws Exception {
HttpServer server = HttpServer.create(new InetSocketAddress(8001), 0);
server.createContext("/post", new BasicPostHttpHandler());
// excutor
server.setExecutor(null);
server.start();
}
public class BasicPostHttpHandler implements HttpHandler{
@Override
public void handle(HttpExchange httpExchange) throws IOException {
InputStream is = httpExchange.getRequestBody();
String requestData = is2string(is);
System.out.println("request: " + requestData);
String response = "{\"pid\":\"510229197206267348\",\"pname\":\"\"}"; // failed
// String response = "hello world"; //
System.out.println("response: " + response);
is.close();
Headers headers = httpExchange.getResponseHeaders();
headers.set("Content-Type", "application/json; charset=utf-8");
headers.set("Access-Control-Allow-Origin", "*");
headers.set("Access-Control-Allow-Methods","GET,POST,PUT,DELETE,OPTIONS");
headers.set("Access-Control-Allow-Headers", "Origin,X-Requested-With,Content-Type,Accept");
httpExchange.sendResponseHeaders(200, response.length());
OutputStream os = httpExchange.getResponseBody();
os.write(response.getBytes());
os.close();
}
private String is2string(InputStream is) throws IOException {
final int bufferSize = 1024;
final char[] buffer = new char[bufferSize];
final StringBuilder out = new StringBuilder();
Reader in = new InputStreamReader(is, "UTF-8");
for (; ; ) {
int rsz = in.read(buffer, 0, buffer.length);
if (rsz < 0)
break;
out.append(buffer, 0, rsz);
}
return out.toString();
}
}