springboot 使用restTemplate 发送https请求 忽略ssl证书

最近在写接口的时候给对方回推数据，发送https请求的时候遇到这么个报错：javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested targetHTTPS经由超文本传输协议（HTTP）进行通信，但利用SSL/TLS来加密数据包，这里遇到的问题就是这个安全证书缺少产生的，所以，为了解决这个问题，一般有良好总方法，第一种是将对方网站的证书提前下到本地导入，这里的场景不大适合这个方式，所以采用第二种方式，忽略ssl证书的方法：

具体步骤大致有3步，首先添加一个RestTemplateConfig配置文件，源码如下：

import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.ssl.TrustStrategy;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;
import javax.net.ssl.SSLContext;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;

/**
 * <p>Description: restTemplate配置类</p >
 * <p>Copyright: Copyright (c) 2022</p >
 *
 * @author zhunter
 * @version 1.0
 * @date 2022-09-07-16:32
 */

@Configuration
public class RestTemplateConfig {

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

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory(){
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
        factory.setConnectTimeout(15000);
        factory.setReadTimeout(5000);
        return factory;
    }

    public static HttpComponentsClientHttpRequestFactory generateHttpRequestFactory()
            throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException
    {
        TrustStrategy acceptingTrustStrategy = (x509Certificates, authType) -> true;
        SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();
        SSLConnectionSocketFactory connectionSocketFactory = new SSLConnectionSocketFactory(sslContext, new NoopHostnameVerifier());

        HttpClientBuilder httpClientBuilder = HttpClients.custom();
        httpClientBuilder.setSSLSocketFactory(connectionSocketFactory);
        CloseableHttpClient httpClient = httpClientBuilder.build();
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
        factory.setHttpClient(httpClient);
        return factory;
    }
}

第二步，修改初始化RestTemplate类：

RestTemplate restTemplate = new RestTemplate(RestTemplateConfig.generateHttpRequestFactory());

第三步便可以将发送信息写进代码中发送请求了

/**
     * 调用第三方服务器接口
     * 传入JSONObject表示post请求
     * 不传表示get请求
     * @param url 路由
     * @param jsonObject 参数
     * @param method 方法
     * @return
     */
    public static JSONObject forwardAlgorithm(String url,JSONObject jsonObject,HttpMethod method) throws Exception{
        RestTemplate restTemplate = new RestTemplate(RestTemplateConfig.generateHttpRequestFactory());
        //此处加编码格式转换
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setContentType(org.springframework.http.MediaType.APPLICATION_JSON_UTF8);
        HttpEntity httpEntity = new HttpEntity(jsonObject, httpHeaders);
        //访问第三方服务器
        ResponseEntity<String> exchange = restTemplate.exchange(url, method, httpEntity, String.class);
        return JSONObject.parseObject(exchange.getBody(),JSONObject.class);
    }