使用原始httpClient 实现 http post 请求

使用原始httpClient实现http post请求，可以按照以下步骤进行：

1. 创建一个HttpClient对象

HttpClient client = new DefaultHttpClient();

2. 创建HttpPost请求对象，并设置请求的URL

HttpPost post = new HttpPost("http://yoururl.com");

3. 创建请求参数，并设置到HttpPost对象中

List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("name", "value"));
post.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

4. 执行HttpPost请求，并获取响应结果

HttpResponse response = client.execute(post);
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity);

完整的代码示例：

import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpPostExample {

    public static void main(String[] args) {
        try {
            HttpClient client = new DefaultHttpClient();
            HttpPost post = new HttpPost("http://yoururl.com");

            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("name", "value"));
            post.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

            HttpResponse response = client.execute(post);
            HttpEntity entity = response.getEntity();

            String result = EntityUtils.toString(entity);
            System.out.println(result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}