实际开发过程中，server端是不须要多加代码处理的，由于ssl验证过程是由server（tomcat、nginx等）完毕的。

这段代码也是參考了网上的：

新建一个web项目，项目结构和须要引入的jar例如以下：

web.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>Secure Sockets Layer</display-name>
  <servlet>
    <servlet-name>SSLServlet</servlet-name>
    <servlet-class>com.sengle.cloud.servlet.SSLServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>SSLServlet</servlet-name>
    <url-pattern>/sslServlet</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  <!-- SSL配置 -->
  <security-constraint>
    <web-resource-collection>
      <web-resource-name>SSL</web-resource-name>
      <url-pattern>/*</url-pattern>
    </web-resource-collection>
    <user-data-constraint>
      <description>SSL required</description>
      <transport-guarantee>CONFIDENTIAL</transport-guarantee>
    </user-data-constraint>
  </security-constraint>
</web-app>

server端，写了个servlet（注意配置到web.xml中）。代码例如以下：

import java.io.IOException;
import java.io.PrintWriter;
import java.security.cert.X509Certificate;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SSLServlet extends HttpServlet {

    private static final long serialVersionUID = 1601507150278487538L;
    private static final String ATTR_CER = "javax.servlet.request.X509Certificate";
    private static final String CONTENT_TYPE = "text/plain;charset=UTF-8";
    private static final String DEFAULT_ENCODING = "UTF-8";
    private static final String SCHEME_HTTPS = "https";

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType(CONTENT_TYPE);
        response.setCharacterEncoding(DEFAULT_ENCODING);
        PrintWriter out = response.getWriter();
        X509Certificate[] certs = (X509Certificate[]) request.getAttribute(ATTR_CER);
        if (certs != null) {
            int count = certs.length;
            out.println("共检測到[" + count + "]个client证书");
            for (int i = 0; i < count; i++) {
                out.println("client证书 [" + (++i) + "]： ");
                out.println("校验结果：" + verifyCertificate(certs[--i]));
                out.println("证书具体：\r" + certs[i].toString());
            }
        } else {
            if (SCHEME_HTTPS.equalsIgnoreCase(request.getScheme())) {
                out.println("这是一个HTTPS请求。可是没有可用的client证书");
                request.setAttribute("user", "username");
                out.println(request.getAttribute("user"));
            } else {
                out.println("这不是一个HTTPS请求，因此无法获得client证书列表 ");
                
            }
        }
        out.close();
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }
    
    /**
     * <p>
     * 校验证书是否过期
     * </p>
     * 
     * @param certificate
     * @return
     */
    private boolean verifyCertificate(X509Certificate certificate) {
        boolean valid = true;
        try {
            certificate.checkValidity();
        } catch (Exception e) {
            e.printStackTrace();
            valid = false;
        }
        return valid;
    }

/**
 * Copyright (C) 2011-2014 sgcc Inc. 
 * All right reserved. 
 * modify info:
 */
package com.sengle.cloud.client;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.KeyStore;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;


public class HttpsClient {
    private static final String KEY_STORE_TYPE_TRUST = "jks"; //假设证书为bks格式，那么要改为bks，同一时候以下的KEY_STORE_TYPE_CLIENT也要改为bks
//    private static final String KEY_STORE_TYPE_CLIENT = "PKCS12"; //假设KEY_STORE_TYPE_TRUST为jks，则KEY_STORE_TYPE_CLIENT为PKCS12
    private static final String KEY_STORE_TYPE_CLIENT = "PKCS12"; //假设KEY_STORE_TYPE_TRUST为bks，则此处也应该为bks。
    private static final String SCHEME_HTTPS = "https";
    private static final int HTTPS_PORT = 8443; //此处为tomcat中的配置。默觉得8443
    private static final String HTTPS_URL = "https://10.100.100.24:8443/SSL/sslServlet";
    
    private static final String basePath = "D:/SSL/";
    private static final String KEY_STORE_CLIENT_PATH = basePath + "/client-24.p12"; //假设为bks，那么此处应该为bks格式的证书
    private static final String KEY_STORE_TRUST_PATH = basePath + "/client-24.truststore"; //假设为bks，那么此处应该为bks格式的证书
    private static final String KEY_STORE_PASSWORD = "123456"; //password
    private static final String KEY_STORE_TRUST_PASSWORD = "123456";  // password

    public static void main(String[] args) throws Exception {
        ssl();
    }
    
    private static void ssl() throws Exception {
        HttpClient httpClient = new DefaultHttpClient();
        try {
            KeyStore keyStore  = KeyStore.getInstance(KEY_STORE_TYPE_CLIENT);
            KeyStore trustStore  = KeyStore.getInstance(KEY_STORE_TYPE_TRUST);
            InputStream ksIn = new FileInputStream(KEY_STORE_CLIENT_PATH);
            InputStream tsIn = new FileInputStream(new File(KEY_STORE_TRUST_PATH));
            try {
                keyStore.load(ksIn, KEY_STORE_PASSWORD.toCharArray());
                trustStore.load(tsIn, KEY_STORE_TRUST_PASSWORD.toCharArray());
            } finally {
                try { ksIn.close(); } catch (Exception ignore) {}
                try { tsIn.close(); } catch (Exception ignore) {}
            }
            //双向验证载入keystore和truststore两个证书
            SSLSocketFactory socketFactory = new SSLSocketFactory(keyStore, KEY_STORE_PASSWORD, trustStore);
         
            /*
             * 单向验证，仅仅载入truststore
            SSLSocketFactory socketFactory = new SSLSocketFactory(trustStore);
            */
            
            Scheme sch = new Scheme(SCHEME_HTTPS, HTTPS_PORT, socketFactory);
            httpClient.getConnectionManager().getSchemeRegistry().register(sch);
            HttpGet httpget = new HttpGet(HTTPS_URL);
            System.out.println("executing request" + httpget.getRequestLine());
            HttpResponse response = httpClient.execute(httpget);
            HttpEntity entity = response.getEntity();
            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            if (entity != null) {
                System.out.println("Response content length: " + entity.getContentLength());
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
                String text;
                while ((text = bufferedReader.readLine()) != null) {
                    System.out.println(text);
                }
                bufferedReader.close();
            }
            EntityUtils.consume(entity);
        } finally {
            httpClient.getConnectionManager().shutdown();
        }
    }
}