HttpClient 调用API

package main;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
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.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.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class Main {

private static HttpClient hc = new DefaultHttpClient();

/**
* @param args
*/
public static void main(String[] args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("email", "[e-mail]"));
params.add(new BasicNameValuePair("pwd", "xxx"));
params.add(new BasicNameValuePair("save_login", "1"));

String url = "http://www.oschina.net/action/user/login";

String body = post(url, params);
System.out.println(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));
httpget.setURI(new URI(httpget.getURI().toString() + "?" + str));
// 发送请求
HttpResponse httpresponse = hc.execute(httpget);
// 获取返回数据
HttpEntity entity = httpresponse.getEntity();
body = EntityUtils.toString(entity);
if (entity != null) {
entity.consumeContent();
}
} catch (ParseException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (URISyntaxException e) {
e.printStackTrace();
}
return body;
}

/**
* // Post请求
* @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));
// 发送请求
HttpResponse httpresponse = hc.execute(httppost);
// 获取返回数据
HttpEntity entity = httpresponse.getEntity();
body = EntityUtils.toString(entity);
if (entity != null) {
entity.consumeContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return body;
}

}