Java-利用HttpClient进行https访问

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本文介绍如何通过HttpClient进行https访问。

下载并导入httpClient

下载httpClient，并将jar包导入到项目中

创建SSLClient类

创建SSLClient类，继承DefaultHttpClient，负责创建SSL连接:

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public class SSLClient extends DefaultHttpClient{
	
	public SSLClient() throws Exception{
        super();
        SSLContext ctx = SSLContext.getInstance("TLS");
        X509TrustManager tm = new X509TrustManager() {
                @Override
                public void checkClientTrusted(X509Certificate[] chain,
                        String authType) throws CertificateException {
                }
                @Override
                public void checkServerTrusted(X509Certificate[] chain,
                        String authType) throws CertificateException {
                }
                @Override
                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
        };
        ctx.init(null, new TrustManager[]{tm}, null);
        SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        ClientConnectionManager ccm = this.getConnectionManager();
        SchemeRegistry sr = ccm.getSchemeRegistry();
        sr.register(new Scheme("https", 443, ssf));
    }
	
}

Get请求

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public static String doGet(String url, String params){
	HttpClient httpClient = null;
	HttpGet httpGet = null;
	String result = null; 
	try{
		httpClient = new SSLClient();
		httpGet = new HttpGet(url + (params != null ? ("?" + params) : ""));
		HttpResponse response = httpClient.execute(httpGet);
		if(response != null){
			HttpEntity resEntity = response.getEntity();
			if(resEntity != null){
				result = EntityUtils.toString(resEntity, "utf-8");
			}
		}
	}catch(Exception ex){
		ex.printStackTrace();
	}
	return result;
}

Post请求

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public static String doPost(String url, Map<String,String> params){
		HttpClient httpClient = null;
		HttpPost httpPost = null;
		String result = null;
		try{
			httpClient = new SSLClient();
			httpPost = new HttpPost(url);
			List<NameValuePair> list = new ArrayList<NameValuePair>();
			Iterator iterator = params.entrySet().iterator();
			while(iterator.hasNext()){
				Entry<String,String> elem = (Entry<String, String>) iterator.next();
				list.add(new BasicNameValuePair(elem.getKey(),elem.getValue()));
			}
			if(list.size() > 0){
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "utf-8");
				httpPost.setEntity(entity);
			}
			HttpResponse response = httpClient.execute(httpPost);
			if(response != null){
				HttpEntity resEntity = response.getEntity();
				if(resEntity != null){
					result = EntityUtils.toString(resEntity, "utf-8");
				}
			}
		}catch(Exception ex){
			ex.printStackTrace();
		}
		return result;
	}

获取Cookie

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cookies = ((AbstractHttpClient) httpClient).getCookieStore().getCookies();