如何从servlet发送数据到rest api [英] how to send data from servlet to rest api

问题描述

我想将数据从我的 servlet 发送到 rest api.是怎么做的:

I want to send data from my servlet to a rest api . Is it how it's done :

protected void doPost(
      HttpServletRequest  request
    , HttpServletResponse response
) throws ServletException, IOException {

    String Id= "MyId";

    response.setContentType("application/json");
    response.getWriter().write(Id);
    getServletContext()
        .getRequestDispatcher("<PathofAPI>")
        .forward(request, response);
}

一旦数据被发送，如何在我的休息 api 中检索它

And once the data is send how to retreive it in my rest api

推荐答案

或者，您必须使用 getter 和 setter 为您创建 Id 参数的 POJO 类:

Alternatively you must create POJO class for you Id parameter with getters and setters:

String createRequestUrl="YOUR_LINK WHERE_YOU GET answer FROM";
RestTemplate template=new RestTemplate();
your_POJO_object.setYour_Pojo_Object(Id);
ObjectMapper objectMapper = new ObjectMapper();
MultiValueMap<String, String> orderRequestHeaders=new 
LinkedMultiValueMap<String,String>();
orderRequestHeaders.add("Content-Type", "application/json");
orderRequestHeaders.add("Accept", "application/json");
String orderCreateRequest=objectMapper.writeValueAsString(YOUR POJO object.class);
HttpEntity<String> orderRequest=new HttpEntity<String>(orderCreateRequest, orderRequestHeaders);
String response=template.postForObject(createRequestUrl, orderRequest, String.class);

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