平时工作中难免需要调用http接口来获取数据,尤其对于json的标准数据。一下为在httpclient4.2中使用的方式
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
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.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.PoolingClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;
public class HttpClientGetTest {
static String url = "http://localhost/index.do";
private static PoolingClientConnectionManager cm = new PoolingClientConnectionManager();
private static HttpClient hc = new DefaultHttpClient(cm);
public static void main(String[] args) {
cm.setMaxTotal(100);
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("action", "aaa"));
//增加请求参数
params.add(new BasicNameValuePair("name", "true"));
String body = post(url, params);
long startTime = new Date().getTime();
body = get(url, params);
System.out.println(new Date().getTime() - startTime);
body = get(url, params);
System.out.println(new Date().getTime() - startTime);
body = get(url, params);
System.out.println(new Date().getTime() - startTime);
body = get(url, params);
System.out.println(new Date().getTime() - startTime);
System.out.println(body);
hc.getConnectionManager().shutdown();
}
/**
* // Post请求 貌似post不能用
*
* @param url
* @param params
* @return
*/
public static String post(String url, List<NameValuePair> params) {
String body = null;
try {
// Post请求
HttpPost httppost = new HttpPost(url);
// 设置参数
httppost.setEntity(new UrlEncodedFormEntity(params, "utf-8"));
// 发送请求
HttpResponse httpresponse = hc.execute(httppost);
// 获取返回数据
HttpEntity entity = httpresponse.getEntity();
body = EntityUtils.toString(entity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return body;
}
/**
* Get请求
*
* @param url
* @param params
* @return
*/
public static String get(String url, List<NameValuePair> params) {
String body = null;
try {
// Get请求
HttpGet httpget = new HttpGet(url);
// 设置参数
String str = EntityUtils.toString(new UrlEncodedFormEntity(params,
"utf-8"));
// for (NameValuePair nameValuePair : params) {
// httppost.getParams().setParameter(nameValuePair.getName(),
// nameValuePair.getValue());
// }
// httpget.setURI(new URI(httpget.getURI().toString() + "?" +
// URLEncodedUtils.format(params, "UTF-8")));
httpget.setURI(new URI(httpget.getURI().toString() + "?" + str));
// 发送请求
HttpContext context = new BasicHttpContext();
HttpResponse httpresponse = hc.execute(httpget, context);
// 获取返回数据
HttpEntity entity = httpresponse.getEntity();
body = EntityUtils.toString(entity);
} catch (ParseException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (URISyntaxException e) {
e.printStackTrace();
}finally{
httpget.releaseConnection();
}
return body;
}
}
分享到:
相关推荐
httpclient使用教程
使用httpClient进行代理
httpclient使用详解共8页.pdf.zip
Http协议使用封装jar包(commons-codec-1.3.jar、commons-httpclient-3.1.jar、commons-logging-1.1.jar) 简单使用方法: public static void main(String[] args) { // String str1 = "...
URLConnection和HttpClient使用入门
httpClient 教程 使用事例 单向认证
httpclient是Apache Jakarta Common 下的子项目,可以用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端编程工具包,本文档提供使用httpclient的使用方法
HttpClient已经应用在很多的项目中,比如Apache Jakarta上很著名的另外两个开源项目Cactus和HTMLUnit都使用了HttpClient。 适用人群:JavaWeb开发者 使用场景:在Java后端程序中,模拟浏览器端进行Web请求。 其它:...
Httpclient,一个我们平时开发时经常用到的组件
在.Net Core应用开发中,调用第三方接口也是常有的事情,HttpClient使用人数、使用频率算是最高的一种了,在.Net Core中,HttpClient的使用方式随着版本的升级也发生了一些变化,本次就讲解一下Asp.Net Core2.1前后...
完整的上传实例包括图片和参数配置,可以通过该样例进行扩展使用
NULL 博文链接:https://zhcheng.iteye.com/blog/1292350