如何通过 ssl 发送请求？

Question

我正在尝试从 localhost 向服务器发送请求，但它返回以下错误。

javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?

代码

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;


public class Test {

 public void connectMyServer(){

        Login auth = new Login("username", "password");

        JAXBContext cntx = JAXBContext.newInstance(Login.class);
        Marshaller m = cntx.createMarshaller();
        m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);

        try {
            URL url = new URL("https://www.server.com/requests");
            HttpsURLConnection con = (HttpsURLConnection) url.openConnection();

            con.setRequestMethod("POST");
            con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            con.setDoOutput(true);
            con.setDoInput(true);

            OutputStream os = con.getOutputStream();
            m.marshal(auth, os);
            m.marshal(auth, System.out);

            os.flush();
            con.getResponseCode();

            BufferedReader in = new BufferedReader(new InputStreamReader(
                    con.getInputStream()));

            String inputLine;
            while ((inputLine = in.readLine()) != null) {
                System.out.println(inputLine);
            }
            in.close();
            con.disconnect();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Answer 1

当您应该使用 HttpsURLConnection 时，您正在尝试将 HttpURLConnection 用于 SSL。

编辑：

我试过了：

import java.net.URL;
import java.util.List;
import java.util.Map;

import javax.net.ssl.HttpsURLConnection;

public class Test
{

    public static void main(String[] args) throws Exception
    {
        URL url = new URL("https://www.google.com");
        HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
        Map<String,List<String>> fields = con.getHeaderFields();
        con.disconnect();
    }
}

它运行没有问题。

无论您的技术团队说什么，您的错误消息都表明远程服务器正在响应，就好像它使用 HTTP 而不是 HTTPS。