Java学习心得之 HttpClient的GET和POST请求

作者：枫雪庭

出处：http://www.cnblogs.com/FengXueTing-px/

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Java学习心得之 HttpClient的GET和POST请求

1. 前言
2. GET请求
3. POST请求

一、前言

本篇博文记录了HttpClient的GET和POST请求

本文内容基于以下文章：

http://huangqiqing123.iteye.com/blog/2054436 　　　　　　　　　　　　　　        (HttpClient之 addHeader与setHeader)
http://zywang.iteye.com/blog/916834 　　　　　　　　　　　　　　　　　　        　(使用Apache HttpClient访问JSP发送GET和POST请求)
http://www.linuxidc.com/Linux/2012-02/55502p3.htm 　　　　　　　　　　　　     (HttpClient 4.0的使用详解)

二、GET请求

GET请求的实例如下：

    //httpClient
    HttpClient httpClient = new DefaultHttpClient();

    // get method
    HttpGet httpGet = new HttpGet("https://api.microsofthealth.net/v1/me/Summaries/Daily");

    // set header
    String Au="Bearer "+access_token;
    httpGet.setHeader("Authorization",Au);  

    //response
    HttpResponse response = null;
    try{
        response = httpClient.execute(httpGet);
    }catch (Exception e) {} 

    //get response into String
    String temp="";
    try{
        HttpEntity entity = response.getEntity();
        temp=EntityUtils.toString(entity,"UTF-8");
    }catch (Exception e) {} 

    return temp;

三、POST请求：

GET请求的实例如下：

    //httpClient
    HttpClient httpClient = new DefaultHttpClient();

    // get method
    HttpPost httpPost = new HttpPost("https://login.live.com/oauth20_token.srf");    

    // set header
    httpPost.setHeader("Content-Type","application/x-www-form-urlencoded"); 

    //set params
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("client_id",client_id));
    params.add(new BasicNameValuePair("redirect_uri",redirect_uri));
    params.add(new BasicNameValuePair("client_secret",client_secret));
    params.add(new BasicNameValuePair("code",code));
    params.add(new BasicNameValuePair("grant_type","authorization_code"));
    try{
        httpPost.setEntity(new UrlEncodedFormEntity(params));
    }catch (Exception e) {} 

    //response
    HttpResponse response = null;
    try{
        response = httpClient.execute(httpPost);
    }catch (Exception e) {}

    //get response into String
    String temp="";
    try{
        HttpEntity entity = response.getEntity();
        temp=EntityUtils.toString(entity,"UTF-8");
    }catch (Exception e) {}

    return temp;