添加 ssl 证书 spring 启动应用程序无法启动后

Question

After i added ssl certificate by the instruction on this sitehttps://www.thomasvitale.com/https-spring-boot-ssl-certificate/ application fails to start with following error:

***************************                                                                               
APPLICATION FAILED TO START                                                                               
***************************                                                                               

Description:                                                                                              

The Tomcat connector configured to listen on port 80 failed to start. The port may already be in use or th
e connector may be misconfigured. 

When i change the port i get the same error. netstat -ntulp shows there is no programms are running on that port. When i comment lines associated with ssl in application.properties the server starts normally. Please help me

Answer 1

Try to configure your backend just like that:

1. Add dependency:

    implementation 'org.apache.httpcomponents:httpclient:4.5'

2. Provide RestTemplate bean:

@Bean
private RestTemplate restTemplate() {
        SSLContext sslContext = buildSslContext();
        SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(sslContext);

        HttpClient httpClient = HttpClients.custom()
                .setSSLSocketFactory(socketFactory)
                .build();

        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpClient);

        return new RestTemplate(factory);
    }

private SSLContext buildSslContext() {
        try {
            char[] keyStorePassword = sslProperties.getKeyStorePassword();
            return new SSLContextBuilder()
                    .loadKeyMaterial(
                            KeyStore.getInstance(new File(sslProperties.getKeyStore()), keyStorePassword),
                            keyStorePassword
                    ).build();
        } catch (Exception ex) {
            throw new IllegalStateException("Unable to instantiate SSL context", ex);
        } finally {
            sslProperties.setKeyStorePassword(null);
            sslProperties.setTrustStorePassword(null);
        }
    }

3. Provide required SSL properties in your application.properties or application.yaml file:

server:
    ssl:
        enabled: true
        key-store: /path/to/key.keystore
        key-store-password: password
        key-alias: alias
        trust-store: /path/to/truststore
        trust-store-password: password

That's it. Now you can see your Tomcat is starting on 8080 (or another port) (https).

Alternatively, you can use my spring boot starter

Answer 2

Look further down your stack trace. You'll most probably see a section in your stack trace related to some SSL exception, preventing Tomcat from starting up correctly.