[网络协议]SpringBoot配置Https

1、创建自签名证书

#使用JDK工具生成自签名证书JKS密钥库
keytool -genkeypair -alias tomcat_https -keypass 123456 -keyalg RSA -keysize 2048 -validity 365 -keystore d:/tomcat_https.keystore -storepass 123456
#从密钥库中导出数字证书
keytool -keystore d:/tomcat_https.keystore -export -alias tomcat_https -file d:/server.cer

生成好的证书文件如下：

2、配置密钥库

将生成的密钥库文件和数字证书的拷贝至resource目录下并在application文件中配置相关信息：

#https默认端口：443，http默认端口：80
server.port=443
server.http-port=80

#开启https，配置跟证书一一对应
server.ssl.enabled=true
#指定证书
server.ssl.key-store=classpath:tomcat_https.keystore
server.ssl.key-store-type=JKS
#别名
server.ssl.key-alias=tomcat_https
#密码
server.ssl.key-password=123456
server.ssl.key-store-password=123456

spring.application.name=springboot-https

项目目录结构如下：

3、http强制跳转https

在config目录下新建Http2Https.java文件，内容如下：

package cn.tsa.gitee.config;

import org.apache.catalina.Context;
import org.apache.catalina.connector.Connector;
import org.apache.tomcat.util.descriptor.web.SecurityCollection;
import org.apache.tomcat.util.descriptor.web.SecurityConstraint;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * http强制跳转https
 */
@Configuration
public class Http2Https {

    @Value("${server.port}")
    private int sslPort;//https的端口

    @Value("${server.http-port}")
    private int httpPort;//http的端口

    @Bean
    public TomcatServletWebServerFactory servletContainerFactory() {
        TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory() {
            @Override
            protected void postProcessContext(Context context) {
                //设置安全性约束
                SecurityConstraint securityConstraint = new SecurityConstraint();
                securityConstraint.setUserConstraint("CONFIDENTIAL");
                //设置约束条件
                SecurityCollection collection = new SecurityCollection();
                //拦截所有请求
                collection.addPattern("/*");
                securityConstraint.addCollection(collection);
                context.addConstraint(securityConstraint);
            }
        };
        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
        //设置将分配给通过此连接器接收到的请求的方案
        connector.setScheme("http");

        //true： http使用http, https使用https;
        //false： http重定向到https;
        connector.setSecure(false);

        //设置监听请求的端口号，这个端口不能其他已经在使用的端口重复，否则会报错
        connector.setPort(httpPort);

        //重定向端口号(非SSL到SSL)
        connector.setRedirectPort(sslPort);

        tomcat.addAdditionalTomcatConnectors(connector);
        return tomcat;
    }
}

4、地址访问

启动项目，访问：http://localhost:80/hello或者https://localhost:443/hello，都会自动跳转到https://localhost/hello

5、程序访问

测试程序访问接口：

在util目录下新建HttpsUtil.java文件，内容如下：

package cn.tsa.gitee.util;

import java.io.*;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

public class HttpsUtil {

    private static final class DefaultTrustManager implements X509TrustManager {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }
    }

    private static HttpsURLConnection getHttpsURLConnection(String uri, String method) throws IOException {
        SSLContext ctx = null;
        try {
            ctx = SSLContext.getInstance("TLS");
            ctx.init(new KeyManager[0], new TrustManager[]{new DefaultTrustManager()}, new SecureRandom());
        } catch (KeyManagementException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        SSLSocketFactory ssf = ctx.getSocketFactory();

        URL url = new URL(uri);
        HttpsURLConnection httpsConn = (HttpsURLConnection) url.openConnection();
        httpsConn.setSSLSocketFactory(ssf);
        httpsConn.setHostnameVerifier(new HostnameVerifier() {
            @Override
            public boolean verify(String arg0, SSLSession arg1) {
                return true;
            }
        });
        httpsConn.setRequestMethod(method);
        httpsConn.setDoInput(true);
        httpsConn.setDoOutput(true);
        return httpsConn;
    }

    private static byte[] getBytesFromStream(InputStream is) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] kb = new byte[1024];
        int len;
        while ((len = is.read(kb)) != -1) {
            baos.write(kb, 0, len);
        }
        byte[] bytes = baos.toByteArray();
        baos.close();
        is.close();
        return bytes;
    }

    private static void setBytesToStream(OutputStream os, byte[] bytes) throws IOException {
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        byte[] kb = new byte[1024];
        int len;
        while ((len = bais.read(kb)) != -1) {
            os.write(kb, 0, len);
        }
        os.flush();
        os.close();
        bais.close();
    }

    public static byte[] doGet(String uri) throws IOException {
        HttpsURLConnection httpsConn = getHttpsURLConnection(uri, "GET");
        return getBytesFromStream(httpsConn.getInputStream());
    }

    public static byte[] doPost(String uri, String data) throws IOException {
        HttpsURLConnection httpsConn = getHttpsURLConnection(uri, "POST");
        setBytesToStream(httpsConn.getOutputStream(), data.getBytes());
        return getBytesFromStream(httpsConn.getInputStream());
    }
}