Java如何post请求时发送JSON数据呢?

httpClient发送JSON数据的示例

实现思路:
   1.引入Apache HttpClient jar包
   2.创建一个HttpPost请求
       并添加header application/x-www-form-urlencoded
   3.创建一个StringEntity
        将JSON传递给它
   4.运行代码

HttpClient httpClient = HttpClientBuilder.create().build();
try {
    HttpPost request = new HttpPost("http://java265.com");
    StringEntity params = new StringEntity("details={\"name\":\"xyz\",\"age\":\"20\"} ");
    request.addHeader("content-type", "application/x-www-form-urlencoded");
    request.setEntity(params);
    HttpResponse response = httpClient.execute(request);
} catch (Exception ex) {
} finally {

}