使用httpclient 调用post方式api

PostExample.java

package client;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
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;

/**
 * 调用post方式的接口，获取参数
 * 
 * @author weizhankui
 * 
 */
public class PostExample {
	public static void visitPostUrl() throws ClientProtocolException,
			IOException {
		HttpClient httpclient = new DefaultHttpClient();
		HttpPost httppost = new HttpPost(
				"http://localhost:8080/msg/test?apikey=apikey");
		// 参数
		List<NameValuePair> nvps = new ArrayList<NameValuePair>();
		nvps.add(new BasicNameValuePair("uid", "这是uid"));
		nvps.add(new BasicNameValuePair("type", "这是类型"));
		// 设置编码
		httppost.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8));

		System.out.println("执行: " + httppost.getRequestLine());

		HttpResponse response = httpclient.execute(httppost);
		HttpEntity resEntity = response.getEntity();
		// 返回状态码
		StatusLine statusLine = response.getStatusLine();
		if (statusLine.getStatusCode() >= 300) {
			System.out.println("出错了" + statusLine.getReasonPhrase());
		}
		// 返回值
		if (resEntity != null) {
			System.out.println(new String(EntityUtils.toByteArray(resEntity),
					Charset.forName("utf-8")));
		}
	}

	public static void main(String[] args) {
		try {
			visitPostUrl();
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}