java - 当我向 URL 发布 https 请求时出现 "unable to find valid certification path to requested target"

Question

我已在本地 Tomcat 中完成 SSL 配置。
当我调用 getOutputStream() 时抛出异常

public static InputStream send( String uri, Map<String, String> queryString, 
            Map<String, String> headers, String method, String reqBody) throws IOException
    {
        String body = (reqBody != null ? reqBody : "");

        //URL myURL = new URL(addUrlParam(uri, queryString));
        URL myURL = new URL(uri);
        HttpURLConnection httpConn = (HttpURLConnection)myURL.openConnection();

        httpConn.setRequestMethod(method);
        httpConn.setRequestProperty("Content-Length", String.valueOf(body.toString().getBytes().length));

        if ( headers != null ) {
            for ( String key : headers.keySet() ) {
                httpConn.setRequestProperty(key, headers.get(key));
            }
        }

        httpConn.setDoInput(true);

        //POST
        if (!HTTP_GET.equals(method) || body.length() > 0) {
            httpConn.setDoOutput(true);
            httpConn.setUseCaches(false); //POST do not use user caches
            ***httpConn.getOutputStream().write(body.toString().getBytes());***
            httpConn.getOutputStream().flush();
        }

        return httpConn.getInputStream();
    }

如何解决这个问题？

提前致谢!!

Answer 1

Java 需要已知根 CA 的有效证书路径。如果您尝试访问具有自签名证书的站点，则需要将自签名证书的 CA key 作为 CA key 添加到您的 keystore 中。假设您的 CA 证书位于文件 cacert.pem 中，请按如下方式使用 keytool:

keytool -importcert -file cacert.pem -keystore client.jks -storepass some-password