Question

我试图点击https网址并下载该文件。以下是代码。

import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.io.*;
import java.net.*;

public class SampleTest {

    public static void main(String[] args) throws Exception {

        URL url;
        InputStream is = null;
        BufferedReader br;
        String line;
        // Install Authenticator
        MyAuthenticator.setPasswordAuthentication("myUsername", "myPassword");
        Authenticator.setDefault (new MyAuthenticator ());

        try {
            url = new URL("https://myURL/");
            is = url.openStream();   
            br = new BufferedReader(new InputStreamReader(is));
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }
        } catch (MalformedURLException mue) {
            mue.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        } finally {
            try {
                if (is != null) is.close();
            } catch (IOException ioe) {
                // nothing to see here
            }
        }

    }
    }

class MyAuthenticator extends Authenticator {
    private static String username = "";
    private static String password = "";

    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(MyAuthenticator.username,
                MyAuthenticator.password.toCharArray());
    }

    public static void setPasswordAuthentication(String username, String password) {
        MyAuthenticator.username = username;
        MyAuthenticator.password = password;
    }
}

以下是生成的异常：

java.io.IOException: Server returned HTTP response code: 403 for URL: 
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1876)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at java.net.URL.openStream(URL.java:1045)
    at SampleTest.main(SampleTest.java:20)

请指教。我尝试了所有可能的方法来验证和访问URL，但没有运气。以前任何人都面临同样的问题。

- 已编辑 - 尝试使用以下代码。连接的语句已打印，然后是异常。

 public static void main(String args[]) throws Exception{

        URLConnection connection = new URL("https://myURL/").openConnection();
        connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
        connection.connect();
        System.out.print("--connected---");

       BufferedReader r  = new BufferedReader(new InputStreamReader(connection.getInputStream(), Charset.forName("UTF-8")));
       System.out.print("--rrr---" + r);
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = r.readLine()) != null) {
            sb.append(line);
        }
        System.out.println(sb.toString());
    }

例外：

--connected---Exception in thread "main" java.io.IOException: Server returned HTTP response code: 403 for URL: https://myURL
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1876)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at FinalTest.main(FinalTest.java:20)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

Answer 1

我尝试模拟您的问题并设法在通过HTTPS进行身份验证时重现相同的错误，但之后我设法通过设置系统属性来解决它，如下所示。

System.setProperty（＆＃34; http.agent＆＃34;，＆＃34; Mozilla / 4.76＆＃34;）;

P.S我的JDK设置为1.8

无法解决URL的异常java.io.IOException：403

1 个答案: