java - Java 中的重定向 URL 类型 301

Question

我学会了从 URL 中了解实际链接重定向的位置。在重定向 URL 网站上进行 testinf 后，它给出 url 重定向类型 301。因此，我根据下面的链接进行测试以获得真实的链接。 Get hold of redirect url with Java org.apache.http.client

代码如下所示:

HttpGet httpget = new HttpGet(filename);
HttpContext context = new BasicHttpContext(); 
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpResponse response = httpClient.execute((HttpUriRequest) httpget, context); 
if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK)
    throw new IOException(response.getStatusLine().toString());
HttpUriRequest currentReq = (HttpUriRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST);
HttpHost currentHost = (HttpHost)  context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
String currentUrl = currentHost.toURI() + currentReq.getURI();
System.out.println(currentUrl);

但我收到了这条消息:

The method execute(HttpUriRequest, HttpContext) in the type AbstractHttpClient is not >applicable for the arguments (HttpGet, HttpContext)

有人可以帮助我吗，这段代码出了什么问题？

Answer 1

您的代码对我来说运行良好，具有此 httpclient 依赖项:

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.1.2</version>
</dependency>

以及这些导入:

import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpContext;

检查您是否使用了正确的依赖项。