如何将 json 放入 HTTPPost 请求正文中，然后响应读取正文答案

【问题标题】：How to put json in HTTPPostRequest Body and then on response reading the body如何将 json 放入 HTTPPost 请求正文中，然后响应读取正文
【发布时间】：2016-09-05 09:11:51
【问题描述】：

我正在尝试使用正文进行 HTTP 发布请求。我想知道如何将 json 对象放入请求正文中，然后读取正文作为响应。

HttpClient httpClient = HttpClientBuilder.create().build();
    String responseString = null;
    try {
        HttpPost request = new HttpPost(link);
        log.info("Executing request " + request.getRequestLine());
        StringEntity params = new StringEntity(data);
        request.addHeader("content-type", "application/json");
        request.setEntity(params);
        HttpResponse response = httpClient.execute(request);
        HttpEntity entity = response.getEntity();
        responseString = EntityUtils.toString(entity, "UTF-8");
    } catch (Exception e) {
        log.info("Exception thrown while executing HTTPPostRequest");
    }
    return responseString;

这是我目前用来发出请求的代码片段。如果使用“StringEntity”是将数据放入正文中的正确选择。我得到了空的正文，它应该返回包含 json 数据的正文

【问题讨论】：

检查这个：stackoverflow.com/questions/7181534/…

标签： java post http-post

【解决方案1】：

只要你的“数据”是 json 就可以了。

HttpClient httpClient = HttpClientBuilder.create().build();
    String responseString = null;
    try {
        HttpPost request = new HttpPost(link);
        log.info("Executing request " + request.getRequestLine());
        StringEntity content = new StringEntity(data);
        content.setContentType("application/json"); 
        //or request.setHeader("Content-type", "application/json");
        request.setEntity(content);
        HttpResponse response = httpClient.execute(request);
        HttpEntity entity = response.getEntity();
        responseString = EntityUtils.toString(entity, "UTF-8");
    } catch (Exception e) {
        log.info("Exception thrown while executing HTTPPostRequest");
    }
    return responseString;

【讨论】：