openfeign 绕开ssl

要绕开OpenFeign的SSL验证，可以通过配置FeignClient的属性来实现。在FeignClient的注解中，可以添加`@FeignClient(name = "example", configuration = ExampleFeignConfiguration.class)`，其中`ExampleFeignConfiguration`是一个自定义的配置类。在这个配置类中，可以使用`feign.okhttp.OkHttpClient`来创建一个自定义的OkHttpClient，并通过设置`sslSocketFactory`和`hostnameVerifier`来绕开SSL验证。

以下是一个示例的配置类：

@Configuration
public class ExampleFeignConfiguration {

    @Bean
    public OkHttpClient okHttpClient() throws Exception {
        TrustManager\[\] trustAllCerts = new TrustManager\[\]{new X509TrustManager() {
            public X509Certificate\[\] getAcceptedIssuers() {
                return new X509Certificate\[0\];
            }

            public void checkClientTrusted(X509Certificate\[\] certs, String authType) {
            }

            public void checkServerTrusted(X509Certificate\[\] certs, String authType) {
            }
        }};

        SSLContext sslContext = SSLContext.getInstance("TLS");
        sslContext.init(null, trustAllCerts, new SecureRandom());

        HostnameVerifier hostnameVerifier = (hostname, session) -> true;

        return new OkHttpClient.Builder()
                .sslSocketFactory(sslContext.getSocketFactory(), (X509TrustManager) trustAllCerts\[0\])
                .hostnameVerifier(hostnameVerifier)
                .build();
    }
}

在这个配置类中，我们创建了一个自定义的OkHttpClient，通过设置`sslSocketFactory`和`hostnameVerifier`来绕开SSL验证。然后，在FeignClient的注解中，指定使用这个配置类。

这样配置之后，OpenFeign就会使用自定义的OkHttpClient来发送请求，从而绕开SSL验证。
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