原因分析:
大多数现代的 HTTPS 连接将使用 TLS 1.2协议 或 TLS 1.3 协议,具体取决于服务器和客户端支持的版本以及其之间的协商,而JDK7及以下版本默认使用是TLS v1协议,所以在调用HTTPS接口时,会出现java.net.SocketException: Connection reset报错;
下面是不同JDK版本的默认TLS协议:
java
JDK 6
SSL v3
TLS v1(默认)
TLS v1.1(JDK6 update 111 及以上)
JDK 7
SSLv3
TLS v1(默认)
TLS v1.1
TLS v1.2
JDK 8
SSL v3
TLS v1
TLS v1.1
TLS v1.2(默认)
解决方案:
手动设置TLS协议为v1.2版本,下面我提供了POST+JSON+用户认证请求(如果不需要用户认证的,可以去掉)代码示例供参考:
java
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.codec.binary.Base64;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
public class HttpClientUtils {
public static void main(String[] args) {
try {
String path = "https://XXXXXXXXXX";
JSONObject param = new JSONObject();
param.put("param1", "参数1");
param.put("param2", "参数2");
String resStr = HttpClientUtils.sendHttpsPostTLSAdd(path, param.toJSONString(), "用户账号", "用户密码", "UTF-8");
System.out.println(resStr);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* post请求,设置TLS协议
* @param url
* @param json
* @param username 用户名
* @param password 密码
* @param charSet 请求编码(UTF-8)
* @return
* @throws Exception
*/
public static String sendHttpsPostTLSAdd(String url, String json, String username, String password, String charSet) throws Exception {
// 实现一个X509TrustManager接口,用于绕过验证,不用修改里面的方法
X509TrustManager trustManager = new X509TrustManager() {
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
@Override
public void checkClientTrusted(X509Certificate[] arg0, String arg1)
throws CertificateException {
}
@Override
public void checkServerTrusted(X509Certificate[] arg0, String arg1)
throws CertificateException {
}
};
// 设置TLS协议版本为TLSv1.2
SSLContext sc = SSLContext.getInstance("TLSv1.2");
sc.init(null, new TrustManager[] { trustManager }, null);
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sc);
// 得到httpClient对象
CloseableHttpClient httpClient = null;
HttpPost httpPost = null;
String result = null;
httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
httpPost = new HttpPost(url);
// 用户认证
String authString = username + ":" + password;
String encodedAuthString = Base64.encodeBase64String(authString.getBytes());
httpPost.setHeader("Authorization", "Basic " + encodedAuthString);
// 推送配置
StringEntity entity = new StringEntity(json, charSet);
entity.setContentEncoding(charSet); // 设置编码格式
entity.setContentType("application/json"); // 设置JSON请求
httpPost.setEntity(entity);
// 执行
HttpResponse response = httpClient.execute(httpPost);
if (response != null) {
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
result = EntityUtils.toString(resEntity, charSet);
}
}
return result;
}
}