Spring Boot中启动HTTPS
如果你使用Spring Boot，并且想在内嵌tomcat中添加HTTPS，需要如下步骤
要有一个证书，买的或者自己生成的
在Spring Boot中启动HTTPS
将HTTP重定向到HTTPS（可选）
获取SSL证书
有两种方式
这里作为演示，采用keytool生成
输入下面的命令，根据提示输入信息
keytool -genkey -alias tomcat -storetype PKCS12 -keyalg RSA -keysize 2048 -keystore keystore.p12 -validity 3650Enter keystore password:
Re-enter new password:
What is your first and last name?
[Unknown]:
What is the name of your organizational unit?
[Unknown]:
What is the name of your organization?
[Unknown]:
What is the name of your City or Locality?
[Unknown]:
What is the name of your State or Province?
[Unknown]:
What is the two-letter country code for this unit?
[Unknown]:
Is CN=Unknown, OU=Unknown, O=Unknown, L=Unknown, ST=Unknown, C=Unknown correct?
[no]: yes/是
会生成一个PKCS12格式的叫做keystore.p12的证书，之后启动Spring Boot时会引用这个证书
Spring Boot 中开启HTTPS
默认情况下Spring Boot内嵌的Tomcat服务器会在8080端口启动HTTP服务，Spring Boot允许在application.properties中配置HTTP或HTTPS，但是不可同时配置，如果两个都启动，至少有一个要以编程的方式配置，Spring Boot官方文档建议在application.properties中配置HTTPS，因为HTTPS比HTTP更复杂一些，可以参考spring-boot-sample-tomcat-multi-connectors的实例
在application.properties中配置HTTPS
server.port: 8081
server.ssl.key-store: classpath:keystore.p12
server.ssl.key-store-password: dooioo888
server.ssl.keyStoreType: PKCS12
server.ssl.keyAlias: tomcat
这就够了
将HTTP请求重定向到HTTPS（可选）
让我们的应用支持HTTP是个好想法，但是需要重定向到HTTPS，上面说了不能同时在application.properties中同时配置两个connector，所以要以编程的方式配置HTTP connector，然后重定向到HTTPS connector
这需要在配置类中配置一个TomcatEmbeddedServletContainerFactory bean，代码如下
@Bean
public EmbeddedServletContainerFactory servletContainer() {
TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory() { @Override
protected void postProcessContext(Context context) {
SecurityConstraint securityConstraint = new SecurityConstraint();
securityConstraint.setUserConstraint("CONFIDENTIAL");
SecurityCollection collection = new SecurityCollection();
collection.addPattern("/*");
securityConstraint.addCollection(collection);
context.addConstraint(securityConstraint);
}
};
tomcat.addAdditionalTomcatConnectors(initiateHttpConnector()); return tomcat;
} private Connector initiateHttpConnector() {
Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
connector.setScheme("http");
connector.setPort(8080);
connector.setSecure(false);
connector.setRedirectPort(8443); return connector;
}搞定！
