HttpClient4使用

 

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", "xxx@gmail.com"));
        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;
    }
 
}

　　

2. HttpClient4使用     

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", "xxx@gmail.com"));

        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;

    }

 

}

转自：http://www.oschina.net/code/snippet_54371_1515