HttpClient:如何发送参数和检索答案

// 创建HttpClient对象
HttpClient httpClient = new DefaultHttpClient();

// 创建HttpPost请求对象
HttpPost httpPost = new HttpPost("http://example.com/api");

// 创建参数列表
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("param1", "value1"));
params.add(new BasicNameValuePair("param2", "value2"));

// 设置参数实体
httpPost.setEntity(new UrlEncodedFormEntity(params));

// 发送请求并获取响应
HttpResponse httpResponse = httpClient.execute(httpPost);

// 获取响应实体
HttpEntity httpEntity = httpResponse.getEntity();

// 判断响应状态码
int statusCode = httpResponse.getStatusLine().getStatusCode();
if (statusCode == HttpStatus.SC_OK) {
    // 解析响应实体
    String response = EntityUtils.toString(httpEntity);
    // 处理响应数据
    System.out.println(response);
} else {
    // 处理错误状态码
    System.out.println("请求失败：" + statusCode);
}

// 关闭连接
httpClient.getConnectionManager().shutdown();