测试环境

Windows 7

IE 11

Intellij IDEA 2017

JDK 1.8.0_25

Tomcat 6.0.36

httpcore 4.4.6

httpclient 4.5.3

keytool：证书生成工具，在JDK 1.4以后的版本中都包含了这一工具，它的位置为<JAVA_HOME>\bin\keytool.exe

单向认证

• 生成服务端keystore

C:\Users\Administrator>keytool -genkeypair -alias server -keyalg RSA -keysize 1024 -keypass changeit -keystore d:/server -storepass changeit
您的名字与姓氏是什么?
  [Unknown]:  localhost
您的组织单位名称是什么?
  [Unknown]:  localhost
您的组织名称是什么?
  [Unknown]:  localhost
您所在的城市或区域名称是什么?
  [Unknown]:  hz
您所在的省/市/自治区名称是什么?
  [Unknown]:  zj
该单位的双字母国家/地区代码是什么?
  [Unknown]:  cn
CN=localhost, OU=localhost, O=localhost, L=hz, ST=zj, C=cn是否正确?
  [否]:  y

注意：keypass 和 storepass 要保持一致 如上例中的changeit

• 导出服务端证书

C:\Users\Administrator>keytool -exportcert -alias server -file d:/server.cer -keystore d:/server -storepass changeit

• 将服务端证书导入到客户端的环境中

C:\Users\Administrator>keytool -importcert -alias server -keystore %JAVA_HOME%\jre\lib\security\cacerts -storepass changeit -file d:/server.cer
所有者: CN=localhost, OU=localhost, O=localhost, L=hz, ST=zj, C=cn
发布者: CN=localhost, OU=localhost, O=localhost, L=hz, ST=zj, C=cn
序列号: 7ba673fa
有效期开始日期: Sun May 21 16:34:22 CST 2017, 截止日期: Sat Aug 19 16:34:22 CST
2017
证书指纹:
         MD5: F6:00:4B:9B:43:63:5A:26:20:4D:32:5B:70:FA:C4:71
         SHA1: 25:EB:6A:06:FA:46:73:A7:AB:7E:C2:C3:A1:E2:3B:62:1C:A8:BF:24
         SHA256: A2:DD:86:9F:22:69:2F:C2:D3:0C:36:93:6A:DB:E4:68:87:47:E1:10:C8:
4F:0C:9B:01:64:51:45:E6:BF:58:A4
         签名算法名称: SHA256withRSA
         版本: 3

扩展:

#1: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: E3 04 36 1E 00 1C 77 34   29 2C AE BF CC FC 28 F5  ..6...w4),....(.
0010: D8 17 1C 17                                        ....
]
]

是否信任此证书? [否]:  y
证书已添加到密钥库中

这一步可以不用执行，只要代码中设置不校验证书即可，但是这样不安全，不推荐。

• 配置Tomcat

    <Connector port="443" protocol="HTTP/1.1" SSLEnabled="true"
               maxThreads="150" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS"
               keystoreFile="D:/server"
               keystorePass="changeit"/>

• 测试

1. 浏览器访问 https://localhost （提示警告 选择继续浏览即可）
2. httpclient测试访问

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.ssl.TrustStrategy;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * Created by leafsunday on 2017/5/20 .
 */
public class HttpsTest {

    public static void main(String args[]) throws Exception{
        CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory()).build();
        HttpGet httpGet = new HttpGet("https://localhost");
        CloseableHttpResponse response = httpClient.execute(httpGet);
        String httpStr = EntityUtils.toString(response.getEntity(), "utf-8");
        System.out.println(httpStr);
    }

    /**
     * 创建SSL安全连接
     *
     * @return
     */
    private static SSLConnectionSocketFactory createSSLConnSocketFactory() throws Exception {

        SSLContext sslContext = SSLContextBuilder.create()
                /*
                //设置不校验服务端证书 不安全（不推荐）
                .loadTrustMaterial(null, new TrustStrategy() {
                    public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        return true;
                    }
                })
                */
                .build();

        return new SSLConnectionSocketFactory(sslContext
            /*
                //设置不校验hostname
                , new HostnameVerifier() {
            public boolean verify(String s, SSLSession sslSession) {
                return true;
            }
        }
        */
        );
    }
}