分块读写

final HttpClient client = HttpClient.ofDefault();

final SegmentRequest request = client.post("http://127.0.0.1:8080/").segment();

for (int i = 0; i < 100; i++) {
    // request.isWritable（）判断适用于较大内容的分块写
    if (request.isWritable()) {
        request.write("It's body".getBytes());
    } else {
        throw new IllegalStateException("Channel is unwritable");
    }
}

HttpResponse response = request.end("It's end".getBytes()).get();
System.out.println(response.status());
System.out.println(response.body().string(StandardCharsets.UTF_8));