例： httpClient

import java.io.ByteArrayOutputStream;
import java.io.IOException;
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.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

public class HttpPostUtil {
	
	public void static test(){
	      try {
	          //设置客户端编码
	          // Create HttpClient Object
	          HttpClient httpClient =  HttpClients.createDefault();

	          // Post请求
	          HttpPost httppost = new HttpPost("http://notify.dev.fenqile.com");

	          //设置post编码
	          httppost.getParams().setParameter("http.protocol.content-charset", HTTP.UTF_8);
	          httppost.getParams().setParameter(HTTP.CONTENT_ENCODING, HTTP.UTF_8);
	          httppost.getParams().setParameter(HTTP.CHARSET_PARAM, HTTP.UTF_8);
	          httppost.getParams().setParameter(HTTP.DEFAULT_PROTOCOL_CHARSET, HTTP.UTF_8);
	          //设置post编码
	          // 设置参数
	          List<NameValuePair> params = new ArrayList<NameValuePair>();
	          params.add(new BasicNameValuePair("appid", "xxxxx"));
	          httppost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
	          //设置报文头
	          httppost.setHeader("Content-Type", "application/x-www-form-urlencoded");
	          // 发送请求
	          HttpResponse httpresponse = httpClient.execute(httppost);
	          // 获取返回数据
	          HttpEntity entity = httpresponse.getEntity();

	          ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
	          entity.writeTo(outputStream);
              System.out.println(new String(outputStream.toByteArray(), "utf-8"));
	          if (entity != null) {
	              entity.consumeContent();
	          }
	      } catch (IOException e) {
	          e.printStackTrace();
	      }
	}
	public static void main(String[] args) {
		 HttpPostUtil.test();
	}
	  
}