如何获取Java中的URL的HTTP响应代码？

Question

请告诉我获取特定网址URL响应代码的步骤或代码。

Answer 1

HttpURLConnection：

URL url = new URL("http://example.com"); 
HttpURLConnection connection = (HttpURLConnection)url.openConnection(); 
connection.setRequestMethod("GET"); 
connection.connect(); 

int code = connection.getResponseCode(); 

这决不是一个坚固的例子;你需要处理IOException和什么。但它应该让你开始。

如果您需要更多功能的东西，请查看HttpClient。

Answer 2

URL url = new URL("http://www.google.com/humans.txt"); 
HttpURLConnection http = (HttpURLConnection)url.openConnection(); 
int statusCode = http.getResponseCode(); 

Answer 3

你可以尝试以下方法：

class ResponseCodeCheck 
{ 

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

     URL url = new URL("http://google.com"); 
     HttpURLConnection connection = (HttpURLConnection)url.openConnection(); 
     connection.setRequestMethod("GET"); 
     connection.connect(); 

     int code = connection.getResponseCode(); 
     System.out.println("Response code of the object is "+code); 
     if (code==200) 
     { 
      System.out.println("OK"); 
     } 
    } 
} 

Answer 4

import java.io.IOException; 
import java.net.URL; 
import java.net.HttpURLConnection; 

public class API{ 
    public static void main(String args[]) throws IOException 
    { 
     URL url = new URL("http://www.google.com"); 
     HttpURLConnection http = (HttpURLConnection)url.openConnection(); 
     int statusCode = http.getResponseCode(); 
     System.out.println(statusCode); 
    } 
} 

Answer 5

HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
      connection.setDoOutput(true); 
      connection.setDoInput(true); 
      connection.setRequestMethod("POST"); 

。 。 。 。 。 。 。

System.out.println("Value" + connection.getResponseCode()); 
      System.out.println(connection.getResponseMessage()); 
      System.out.println("content"+connection.getContent()); 

Answer 6

这是对我工作：

import java.io.IOException; 
import java.net.HttpURLConnection; 
import java.net.URL; 

public class UrlHelpers { 

    public static int getHTTPResponseStatusCode(String u) throws IOException { 

     URL url = new URL(u); 
     HttpURLConnection http = (HttpURLConnection)url.openConnection(); 
     return http.getResponseCode(); 
    } 
} 

希望这可以帮助别人:)

Answer 7

这为我工作：

  import org.apache.http.client.HttpClient; 
      import org.apache.http.client.methods.HttpGet; 
      import org.apache.http.impl.client.DefaultHttpClient; 
      import org.apache.http.HttpResponse; 
      import java.io.BufferedReader; 
      import java.io.InputStreamReader; 



      public static void main(String[] args) throws Exception { 
         HttpClient client = new DefaultHttpClient(); 
         //args[0] ="http://hostname:port/xyz/zbc"; 
         HttpGet request1 = new HttpGet(args[0]); 
         HttpResponse response1 = client.execute(request1); 
         int code = response1.getStatusLine().getStatusCode(); 

         try(BufferedReader br = new BufferedReader(new InputStreamReader((response1.getEntity().getContent())));){ 
          // Read in all of the post results into a String. 
          String output = ""; 
          Boolean keepGoing = true; 
          while (keepGoing) { 
           String currentLine = br.readLine();   
           if (currentLine == null) { 
            keepGoing = false; 
           } else { 
            output += currentLine; 
           } 
          } 
          System.out.println("Response-->"+output); 
         } 

         catch(Exception e){ 
           System.out.println("Exception"+e); 

          } 


        } 

Answer 8

您可以使用Java HTTP/https url连接以从网站获取响应代码和其他信息以及这里是一个示例代码。

try { 

      url = new URL("https://www.google.com"); // create url object for the given string 
      HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
      if(https_url.startsWith("https")){ 
       connection = (HttpsURLConnection) url.openConnection(); 
      } 

      ((HttpURLConnection) connection).setRequestMethod("HEAD"); 
      connection.setConnectTimeout(50000); //set the timeout 
      connection.connect(); //connect 
      String responseMessage = connection.getResponseMessage(); //here you get the response message 
      responseCode = connection.getResponseCode(); //this is http response code 
      System.out.println(obj.getUrl()+" is up. Response Code : " + responseMessage); 
      connection.disconnect();` 
}catch(Exception e){ 
e.printStackTrace(); 
} 

Answer 9

通过扫描仪获取数据（有效载荷不均匀）的有效方法。

public static String getResponseFromHttpUrl(URL url) throws IOException { 
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); 
    try { 
     InputStream in = urlConnection.getInputStream(); 

     Scanner scanner = new Scanner(in); 
     scanner.useDelimiter("\\A"); // Put entire content to next token string, Converts utf8 to 16, Handles buffering for different width packets 

     boolean hasInput = scanner.hasNext(); 
     if (hasInput) { 
      return scanner.next(); 
     } else { 
      return null; 
     } 
    } finally { 
     urlConnection.disconnect(); 
    } 
} 

Answer 10

试试这个代码和平被检查的400个错误信息

huc = (HttpURLConnection)(new URL(url).openConnection()); 

huc.setRequestMethod("HEAD"); 

huc.connect(); 

respCode = huc.getResponseCode(); 

if(respCode >= 400) { 
    System.out.println(url+" is a broken link"); 
} else { 
    System.out.println(url+" is a valid link"); 
}