我正在使用resttemplate发出post请求，并收到以下错误：找不到到到请求目标的有效证书路径

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transformToListClass': Invocation of init method failed; nested exception is java.lang.RuntimeException: org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://emploenefitsdev/rion/v1/rion/": sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is 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 target

Caused by: java.lang.RuntimeException: org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://emploenefitsdev/rion/v1/rion/": sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is 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 target

Caused by: org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://emploenefitsdev/rion/v1/rion/": sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is 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 target

Caused by: 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 target

Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

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

我的方法如下：

public ImageDescriptor generateImage(String payLoad, String templateName, String slogPrefix) {
        try {
            ImageDescriptor descriptor = new ImageDescriptor();

            String myEUrl = "https://emploenefitsdev/rion/v1/rion/";
            String eURL = myUrl.concat(Constant.F_SLASH).concat(templateName);

            log.info("payload" + payLoad);

            ResponseEntity<Resource> responseEntity = restTemplate.exchange(
                    eURL,
                    HttpMethod.POST,
                    niService.getStringHttpEntityWithPayload(payLoad),
                    Resource.class);
            log.info(String.format("%s generateImage Result: [%s] ", slogPrefix, responseEntity.getStatusCode()));
            descriptor.setInputStream(Objects.requireNonNull(responseEntity.getBody()).getInputStream());

            convert(responseEntity.getBody().getInputStream(), "sherrr.pdf");

            log.info("file is:"+ convert(responseEntity.getBody().getInputStream(), "sherrr.pdf"));

            return descriptor;
        } catch (IOException e) {
            e.printStackTrace();
            log.error("Error: " + slogPrefix + " generate image failed " + e.getMessage());
            throw new RuntimeException(e);
        }
    }