使用httpclient发送digestAuth认证的请求

以下是使用httpclient发送digestAuth认证的请求的示例代码：

import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.DigestScheme;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class DigestAuthExample {

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

        String username = "username";
        String password = "password";
        String url = "http://example.com/api/resource";

        HttpHost targetHost = new HttpHost("example.com", 80, "http");
        CloseableHttpClient httpClient = HttpClients.createDefault();

        // Create authentication context
        DigestScheme digestAuth = new DigestScheme();
        digestAuth.overrideParamter("realm", "example.com");
        digestAuth.overrideParamter("nonce", "1234567890");
        digestAuth.overrideParamter("qop", "auth");
        digestAuth.overrideParamter("algorithm", "MD5");

        AuthScope authScope = new AuthScope(targetHost.getHostName(), targetHost.getPort());
        UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(username, password);

        HttpClientContext context = HttpClientContext.create();
        context.setCredentialsProvider(authScope, new BasicCredentialsProvider());
        context.setAuthSchemeRegistry(AuthSchemeRegistryBuilder.create().register(AuthSchemes.DIGEST, digestAuth).build());

        // Make the request
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = httpClient.execute(targetHost, httpGet, context);

        // Get the response body
        HttpEntity entity = response.getEntity();
        String responseBody = EntityUtils.toString(entity);

        // Print the response body
        System.out.println(responseBody);

        // Close the response and the client
        response.close();
        httpClient.close();
    }
}

在此示例中，我们首先定义了目标主机（targetHost）和要发送的HTTP请求的URL（url）。然后，我们使用HttpClients.createDefault()方法创建一个HTTP客户端。接下来，我们创建了一个DigestScheme对象，并使用overrideParamter方法设置了必要的参数。然后，我们创建了一个AuthScope对象和一个UsernamePasswordCredentials对象，用于指定要使用的用户名和密码。接下来，我们创建了一个HttpClientContext对象，并使用setCredentialsProvider和setAuthSchemeRegistry方法将上面创建的AuthScope对象、UsernamePasswordCredentials对象和DigestScheme对象添加到上下文中。最后，我们使用httpClient.execute方法发送HTTP请求，并使用EntityUtils.toString方法从响应实体中获取响应正文。最后，我们打印响应正文并关闭响应和HTTP客户端