java - 如何在Java/Android中发送没有任何参数的POST请求？

Question

这是我通常用来向 API 发送 POST 请求的代码:

if (method == "POST") {
    // request method is POST
    // defaultHttpClient

    HttpPost httpPost = new HttpPost(url);

    httpPost.setEntity(new UrlEncodedFormEntity(params));


    HttpResponse httpResponse = httpClient.execute(httpPost);
    HttpEntity httpEntity = httpResponse.getEntity();

    inputStream = httpEntity.getContent();
}

到目前为止一切顺利，但现在有一个新的 API 调用应该是 POST 但没有参数 因此，如果我将 NULL 作为参数传递，则会出现空指针异常，并且没有不带参数的新 UrlEncodedFormEntity() 构造函数，那么我该怎么办？

Answer 1

如果您没有要在 POST 中发送的实体，请跳过添加实体的命令。

if (method == "POST") {
    HttpPost httpPost = new HttpPost(url);
    if (params != null)
        httpPost.setEntity(new UrlEncodedFormEntity(params));
     // else - just nothing

    HttpResponse httpResponse = httpClient.execute(httpPost);
    HttpEntity httpEntity = httpResponse.getEntity();

    inputStream = httpEntity.getContent();
}