在Apache HTTP客户端中，当遇到401错误和格式错误时，可能是由于NTLM响应消息顺序错误引起的。下面是一个解决方法的代码示例：

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthSchemeProvider;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.NTCredentials;
import org.apache.http.client.AuthCache;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.auth.BasicSchemeFactory;
import org.apache.http.impl.auth.NTLMScheme;
import org.apache.http.impl.auth.NTLMSchemeFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

public class NTLMExample {

    public static void main(String[] args) throws Exception {
        // 创建NTLM认证方案提供者
        AuthSchemeProvider authSchemeProvider = new NTLMSchemeFactory();

        // 创建NTLM凭据
        NTCredentials credentials = new NTCredentials("username", "password", "workstation", "domain");

        // 创建NTLM认证上下文
        AuthCache authCache = new BasicAuthCache();
        authCache.put(new HttpHost("hostname", port, "realm"), new BasicScheme());

        // 创建HTTP客户端上下文
        HttpClientContext context = HttpClientContext.create();
        context.setCredentialsProvider(credentialsProvider);
        context.setAuthCache(authCache);

        // 创建HTTP客户端
        CloseableHttpClient httpClient = HttpClients.custom()
                .setDefaultCredentialsProvider(credentialsProvider)
                .setDefaultAuthSchemeRegistry(authSchemeRegistry)
                .build();

        // 创建HTTP GET请求
        HttpGet httpGet = new HttpGet("http://hostname:port/path");

        // 执行请求
        HttpResponse response = httpClient.execute(httpGet, context);
        HttpEntity entity = response.getEntity();

        // 处理响应
        if (entity != null) {
            String responseText = EntityUtils.toString(entity);
            System.out.println(responseText);
        }
    }
}

请注意，上述代码示例中的"username"，"password"，"workstation"，"domain"，"hostname"和"port"分别是根据实际情况填写的。确保将它们替换为正确的值。

此代码示例创建了一个使用NTLM认证的HTTP客户端，并处理了401错误和格式错误。它设置了NTLM认证方案提供者和凭据，创建了HTTP客户端上下文和认证缓存，并将它们与HTTP客户端一起使用。然后，发送HTTP GET请求并处理响应。