Question

我正在处理一个应用程序，它与url连接并从页面检索数据。不幸的是它没有到达我感兴趣的页面。

如何通过Java代码中的GET方法将其重定向到所需的页面？

输出“readline”方法显示我的命中/MRcgi/MRlogin.pl，但我希望转到不同的网址

O / P

 <TITLE> Service Core</TITLE>
            <script type="text/javascript">
                var replace_function = function() {
                    window.location.replace('/MRcgi/MRlogin.pl?USER=***p&PASSWORD=webauth&PROJECTID=-1');
                }

代码 -

    URL obj = new URL(url);
    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
    String userPassword = "*****";

    String encoding = new String(
            org.apache.commons.codec.binary.Base64
                    .encodeBase64(org.apache.commons.codec.binary.StringUtils
                            .getBytesUtf8(userPassword)));



    ((HttpURLConnection) con).setRequestMethod("GET");
    con.setRequestProperty("Content-Type", "text/plain");
    con.setRequestProperty("charset", "UTF-8");
    con.setRequestProperty("Authorization", "Basic " + encoding);


    // Send post request
    ///
    // con.setDoOutput(false); 
      /*  DataOutputStream wr = new DataOutputStream(con.getOutputStream()); 
        System.out.println("1111" +wr); 
        wr.writeBytes(urlParameters); 
        wr.flush(); 
        wr.close();*/


    int responseCode = ((HttpURLConnection) con).getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + con);
    //System.out.println("Post parameters : " + urlParameters);
    System.out.println("Response Code : " + responseCode);
    //window.location.replace("");

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

    String inputLine;
    StringBuffer response = new StringBuffer();
    System.out.println("-----" + in.readLine());
    while ((inputLine = in.readLine()) != null) {
        System.out.println(inputLine);
        //response.append(inputLine);

    }
    in.close();

Answer 1

Raz，URL方法不遵循重定向，并且在指定一些其他HTTP行为时不那么灵活：请求类型，标题等。

我建议您使用Apache HTTP Client代替您的需求。这是an example with authentication from official docs：

CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
        new AuthScope("httpbin.org", 80),
        new UsernamePasswordCredentials("user", "passwd"));
CloseableHttpClient httpclient = HttpClients.custom()
        .setDefaultCredentialsProvider(credsProvider)
        .build();
try {
    HttpGet httpget = new HttpGet("http://httpbin.org/basic-auth/user/passwd");

    System.out.println("Executing request " + httpget.getRequestLine());
    CloseableHttpResponse response = httpclient.execute(httpget);
    try {
        System.out.println("----------------------------------------");
        System.out.println(response.getStatusLine());
        System.out.println(EntityUtils.toString(response.getEntity()));
    } finally {
        response.close();
    }
} finally {
    httpclient.close();
}

请注意，如果使用JDK7或更高版本，则可以使用try-with-resources隐式关闭资源。

在java代码中将url重定向到新url

1 个答案: