Spring Boot RestTemplate 绕过HTTPS证书验证--解决https证书报错

1.Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request p…

sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target…

调用微信端获取openid的接口结果一直报https证书的问题，明明之前都已经获得了openid,结果不知道为什么又给报这个错。。。。。令人头秃。找了好多博客最后也忘了是借鉴哪位大佬的解决了问题。
解决方法如下：
1.在com.httpclient包下创建一个SSL类代码如下

package com.httpclient;

import org.springframework.http.client.SimpleClientHttpRequestFactory;

import javax.net.ssl.*;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;

/**
 * 跳过证书验证封装
 */
public class SSL extends SimpleClientHttpRequestFactory {

    @Override
    protected void prepareConnection(HttpURLConnection connection, String httpMethod)
            throws IOException {
        if (connection instanceof HttpsURLConnection) {
            prepareHttpsConnection((HttpsURLConnection) connection);
        }
        super.prepareConnection(connection, httpMethod);
    }

    private void prepareHttpsConnection(HttpsURLConnection connection) {
        connection.setHostnameVerifier(new SkipHostnameVerifier());
        try {
            connection.setSSLSocketFactory(createSslSocketFactory());
        }
        catch (Exception ex) {
            // Ignore
        }
    }

    private SSLSocketFactory createSslSocketFactory() throws Exception {
        SSLContext context = SSLContext.getInstance("TLS");
        context.init(null, new TrustManager[] { new SkipX509TrustManager() },
                new SecureRandom());
        return context.getSocketFactory();
    }

    private class SkipHostnameVerifier implements HostnameVerifier {

        @Override
        public boolean verify(String s, SSLSession sslSession) {
            return true;
        }

    }

    private static class SkipX509TrustManager implements X509TrustManager {

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[0];
        }

        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) {
        }

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

    }

}

再创建一个RestTemplateConfig类代码如下

package com.config;

import com.httpclient.SSL;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

@Configuration
public class RestTemplateConfig {
    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        return new RestTemplate(factory);
    }

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SSL factory = new SSL();
        factory.setReadTimeout(5000);
        factory.setConnectTimeout(15000);//单位为ms
        return factory;
    }
}