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：
/**
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);
}
}