Springboot starts http2

hexiaoming123 2021-02-22 23:39:51
springboot starts http2 http

http2 Need to be in https Open on the basis of therefore You need a certificate here

#Java It comes with a key management tool --keytool, Use this tool , We can generate a self signed certificate 
C:\project\github\spring-component-use-demo>keytool -genkey -alias undertow -storetype PKCS12 -keyalg RSA -keysize 2048 -keystore keystore.p12 -dname "CN=li, OU=zelin, O=zelin, L=bj, ST= bj, C=CN"
 Enter the keystore password :
 Enter the new password again :
# The password here needs to be configured later in the project The generated keystore.p12 Just put it in the root directory of the project 

Project configuration

# Port number 
# To configure ssl (https)
#keystore.p12 The path of 
# The password you entered before 
# To configure ssl (https) end
# Use http2


public class Http2Controller {

public String demo() {

return "demo";

Name Status Protocol 200 h2

http turn https To configure ( The configuration here is only suitable for Tomcat)

public class Http2HttpsConfig {

public Connector connector(@Value("${server.port}") int port){

Connector connector=new Connector("org.apache.coyote.http11.Http11NioProtocol");
return connector;
public TomcatServletWebServerFactory tomcatServletWebServerFactory(Connector connector){

TomcatServletWebServerFactory tomcat=new TomcatServletWebServerFactory(){

protected void postProcessContext(Context context) {

SecurityConstraint securityConstraint=new SecurityConstraint();
SecurityCollection collection=new SecurityCollection();
return tomcat;

Source code https://github.com/li-ze-lin/spring-component-use-demo/tree/master/open-http2


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