HttpClient4.5 SSL访问工具类

要从网上找一个HttpClient SSL访问工具类太难了，原因是HttpClient版本太多了，稍有差别就不能用，最后笔者干脆自己封装了一个访问HTTPS并绕过证书工具类。

主要是基于新版本HttpClient 4.5：

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/**
解决httpClient对https请求报不支持SSLv3问题.
JDK_HOME/jrebcurity/java.security 文件中注释掉：
jdk.certpath.disabledAlgorithms=MD2
jdk.tls.disabledAlgorithms=DSA(或jdk.tls.disabledAlgorithms=SSLv3)
*/
public class HttpsUtil {
    public static CloseableHttpClient createClient() throws Exception{
        TrustStrategy trustStrategy = new TrustStrategy() {
            @Override
            public boolean isTrusted(X509Certificate[] xc, String msg)
                    throws CertificateException {
                return true;
            }
        };
        SSLContextBuilder builder = new SSLContextBuilder();
        builder.loadTrustMaterial(trustStrategy);
        HostnameVerifier hostnameVerifierAllowAll = new HostnameVerifier() {
            @Override
            public boolean verify(String name, SSLSession session) {
                return true;
            }
        };
        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
                builder.build(), new String[] { "SSLv2Hello", "SSLv3", "TLSv1",
                        "TLSv1.1", "TLSv1.2" }, null, hostnameVerifierAllowAll);
         
        HttpRequestRetryHandler myRetryHandler = new HttpRequestRetryHandler() {
            public boolean retryRequest(
                    IOException exception,
                    int executionCount,
                    HttpContext context) {
                //重试设置
                if (executionCount >= 5) {
                    // Do not retry if over max retry count
                    return false;
                }
                if (exception instanceof InterruptedIOException) {
                    // Timeout
                    return false;
                }
                if (exception instanceof UnknownHostException) {
                    // Unknown host
                    return false;
                }
                if (exception instanceof ConnectTimeoutException) {
                    // Connection refused
                    return false;
                }
                if (exception instanceof SSLException) {
                    // SSL handshake exception
                    return false;
                }
                HttpClientContext clientContext = HttpClientContext.adapt(context);
                HttpRequest request = clientContext.getRequest();
                boolean idempotent = !(request instanceof HttpEntityEnclosingRequest);
                if (idempotent) {
                    return true;
                }
                return false;
            }
        };      
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(120000)
                .setSocketTimeout(120000)//超时设置
                .build();
        CloseableHttpClient httpclient = HttpClients.custom()
                .setSSLSocketFactory(sslsf)
                .setRetryHandler(myRetryHandler)//重试设置
                .setDefaultRequestConfig(requestConfig)
                .build();
        return httpclient;
    }
     
    public static String get(String url) throws Exception {
        return get(url,null,null);
    }
         
    public static String get(String url,Map<String, String> header,Map<String, String> outCookies) throws Exception {
        String body = "";       
        String Encoding ="utf-8";       
        CloseableHttpClient client = createClient();
        try {
            CookieStore cookieStore = new BasicCookieStore();           
            HttpClientContext localContext = HttpClientContext.create();
            localContext.setCookieStore(cookieStore);
            // 创建get方式请求对象
            HttpGet httpGet = new HttpGet(url);
            if(header!=null){
                if(header.get("Accept")!=null) httpGet.setHeader("Accept", header.get("Accept"));
                if(header.get("Cookie")!=null) httpGet.setHeader("Cookie", header.get("Cookie"));
                if(header.get("Accept-Encoding")!=null) httpGet.setHeader("Accept-Encoding", header.get("Accept-Encoding"));
                if(header.get("Accept-Language")!=null) httpGet.setHeader("Accept-Language", header.get("Accept-Language"));
                if(header.get("Host")!=null) httpGet.setHeader("Host", header.get("Host"));
                if(header.get("User-Agent")!=null) httpGet.setHeader("User-Agent", header.get("User-Agent"));
                if(header.get("x-requested-with")!=null) httpGet.setHeader("x-requested-with", header.get("x-requested-with"));
                if(header.get("Encoding")!=null) Encoding =header.get("Encoding");
            }
            System.out.println("请求地址：" + url);
            // 执行请求操作，并拿到结果（同步阻塞）
            CloseableHttpResponse response = client.execute(httpGet,localContext);          
            // 获取结果实体
            try {
                // 如果需要输出cookie
                if(outCookies!=null){
                    List<Cookie> cookies = cookieStore.getCookies();                  
                    for (int i = 0; i < cookies.size(); i++) {
                        outCookies.put(cookies.get(i).getName(),cookies.get(i).getValue());
                    }
                }
                HttpEntity entity = response.getEntity();
                System.out.println("返回：" + response.getStatusLine());
                if (entity != null) {
                    // 按指定编码转换结果实体为String类型
                    body = EntityUtils.toString(entity, Encoding);
                    // System.out.println("返回："+body);
                }
            } finally {
                response.close();
            }
        } finally {
            client.close();
        }
        return body;
    }
 
    public static String post(String url, Map<String, String> params)
            throws Exception {
        return post(url, params, null,null);
    }
     
    public static String post(String url, Map<String, String> params, Map<String, String> header,Map<String, String> outCookies)
            throws Exception {
        String body = "";
        String encoding ="utf-8";
        String contentType="text/html";
        CloseableHttpClient client = createClient();
        CookieStore cookieStore = new BasicCookieStore();           
        HttpClientContext localContext = HttpClientContext.create();
        localContext.setCookieStore(cookieStore);
        try {
            // 创建post方式请求对象
            HttpPost httpPost = new HttpPost(url);
            if(header!=null){
                if(header.get("Accept")!=null) httpPost.setHeader("Accept", header.get("Accept"));
                if(header.get("Cookie")!=null) httpPost.setHeader("Cookie", header.get("Cookie"));              
                if(header.get("Accept-Encoding")!=null) httpPost.setHeader("Accept-Encoding", header.get("Accept-Encoding"));
                if(header.get("Accept-Language")!=null) httpPost.setHeader("Accept-Language", header.get("Accept-Language"));
                if(header.get("Host")!=null) httpPost.setHeader("Host", header.get("Host"));
                if(header.get("User-Agent")!=null) httpPost.setHeader("User-Agent", header.get("User-Agent"));
                if(header.get("x-requested-with")!=null) httpPost.setHeader("x-requested-with", header.get("x-requested-with"));
                if(header.get("Encoding")!=null) encoding =header.get("Encoding");
                if(header.get("Content-Type")!=null) contentType =header.get("Content-Type");
            }
            // 装填参数
            if (contentType.equalsIgnoreCase("text/html")) {
                List<NameValuePair> nvps = new ArrayList<NameValuePair>();
                if (params != null) {
                    for (Entry<String, String> entry : params.entrySet()) {
                        nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                    }
                }
                httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));
            }
            //JOSN格式参数
            if (contentType.equalsIgnoreCase("application/json")) {
                StringEntity myEntity = new StringEntity(JSON.toJSONString(params.get("data")),
                        ContentType.create("application/json", "UTF-8"));
                httpPost.setEntity(myEntity);
            }
            System.out.println("请求地址：" + url);
            // 执行请求操作，并拿到结果（同步阻塞）
            CloseableHttpResponse response = client.execute(httpPost,localContext);
            // 获取结果实体
            try {
                // 如果需要输出cookie
                if(outCookies!=null){
                    List<Cookie> cookies = cookieStore.getCookies();                  
                    for (int i = 0; i < cookies.size(); i++) {
                        outCookies.put(cookies.get(i).getName(),cookies.get(i).getValue());
                    }
                }
                HttpEntity entity = response.getEntity();
                System.out.println("返回：" + response.getStatusLine());
                if (entity != null) {
                    // 按指定编码转换结果实体为String类型
                    body = EntityUtils.toString(entity, encoding);
                    // System.out.println("返回："+body);
                }
            } finally {
                response.close();
            }
        } finally {
            client.close();
        }
        return body;
    }
    public static void main(String[] args) throws Exception {
        String body =get("https://www.baidu.com/");
        System.out.println(body);
    }
}